http://git-wip-us.apache.org/repos/asf/hbase-site/blob/ecb8d8ba/0.94/apidocs/src-html/org/apache/hadoop/hbase/io/encoding/FastDiffDeltaEncoder.html ---------------------------------------------------------------------- diff --git a/0.94/apidocs/src-html/org/apache/hadoop/hbase/io/encoding/FastDiffDeltaEncoder.html b/0.94/apidocs/src-html/org/apache/hadoop/hbase/io/encoding/FastDiffDeltaEncoder.html index fbb011a..c9f897a 100644 --- a/0.94/apidocs/src-html/org/apache/hadoop/hbase/io/encoding/FastDiffDeltaEncoder.html +++ b/0.94/apidocs/src-html/org/apache/hadoop/hbase/io/encoding/FastDiffDeltaEncoder.html @@ -35,523 +35,526 @@ <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.27"></a> <span class="sourceLineNo">028</span>import org.apache.hadoop.io.RawComparator;<a name="line.28"></a> <span class="sourceLineNo">029</span><a name="line.29"></a> -<span class="sourceLineNo">030</span>/**<a name="line.30"></a> -<span class="sourceLineNo">031</span> * Encoder similar to {@link DiffKeyDeltaEncoder} but supposedly faster.<a name="line.31"></a> -<span class="sourceLineNo">032</span> *<a name="line.32"></a> -<span class="sourceLineNo">033</span> * Compress using:<a name="line.33"></a> -<span class="sourceLineNo">034</span> * - store size of common prefix<a name="line.34"></a> -<span class="sourceLineNo">035</span> * - save column family once in the first KeyValue<a name="line.35"></a> -<span class="sourceLineNo">036</span> * - use integer compression for key, value and prefix (7-bit encoding)<a name="line.36"></a> -<span class="sourceLineNo">037</span> * - use bits to avoid duplication key length, value length<a name="line.37"></a> -<span class="sourceLineNo">038</span> * and type if it same as previous<a name="line.38"></a> -<span class="sourceLineNo">039</span> * - store in 3 bits length of prefix timestamp<a name="line.39"></a> -<span class="sourceLineNo">040</span> * with previous KeyValue's timestamp<a name="line.40"></a> -<span class="sourceLineNo">041</span> * - one bit which allow to omit value if it is the same<a name="line.41"></a> -<span class="sourceLineNo">042</span> *<a name="line.42"></a> -<span class="sourceLineNo">043</span> * Format:<a name="line.43"></a> -<span class="sourceLineNo">044</span> * - 1 byte: flag<a name="line.44"></a> -<span class="sourceLineNo">045</span> * - 1-5 bytes: key length (only if FLAG_SAME_KEY_LENGTH is not set in flag)<a name="line.45"></a> -<span class="sourceLineNo">046</span> * - 1-5 bytes: value length (only if FLAG_SAME_VALUE_LENGTH is not set in flag)<a name="line.46"></a> -<span class="sourceLineNo">047</span> * - 1-5 bytes: prefix length<a name="line.47"></a> -<span class="sourceLineNo">048</span> * - ... bytes: rest of the row (if prefix length is small enough)<a name="line.48"></a> -<span class="sourceLineNo">049</span> * - ... bytes: qualifier (or suffix depending on prefix length)<a name="line.49"></a> -<span class="sourceLineNo">050</span> * - 1-8 bytes: timestamp suffix<a name="line.50"></a> -<span class="sourceLineNo">051</span> * - 1 byte: type (only if FLAG_SAME_TYPE is not set in the flag)<a name="line.51"></a> -<span class="sourceLineNo">052</span> * - ... bytes: value (only if FLAG_SAME_VALUE is not set in the flag)<a name="line.52"></a> -<span class="sourceLineNo">053</span> *<a name="line.53"></a> -<span class="sourceLineNo">054</span> */<a name="line.54"></a> -<span class="sourceLineNo">055</span>public class FastDiffDeltaEncoder extends BufferedDataBlockEncoder {<a name="line.55"></a> -<span class="sourceLineNo">056</span> final int MASK_TIMESTAMP_LENGTH = (1 << 0) | (1 << 1) | (1 << 2);<a name="line.56"></a> -<span class="sourceLineNo">057</span> final int SHIFT_TIMESTAMP_LENGTH = 0;<a name="line.57"></a> -<span class="sourceLineNo">058</span> final int FLAG_SAME_KEY_LENGTH = 1 << 3;<a name="line.58"></a> -<span class="sourceLineNo">059</span> final int FLAG_SAME_VALUE_LENGTH = 1 << 4;<a name="line.59"></a> -<span class="sourceLineNo">060</span> final int FLAG_SAME_TYPE = 1 << 5;<a name="line.60"></a> -<span class="sourceLineNo">061</span> final int FLAG_SAME_VALUE = 1 << 6;<a name="line.61"></a> -<span class="sourceLineNo">062</span><a name="line.62"></a> -<span class="sourceLineNo">063</span> private static class FastDiffCompressionState extends CompressionState {<a name="line.63"></a> -<span class="sourceLineNo">064</span> byte[] timestamp = new byte[KeyValue.TIMESTAMP_SIZE];<a name="line.64"></a> -<span class="sourceLineNo">065</span> int prevTimestampOffset;<a name="line.65"></a> -<span class="sourceLineNo">066</span><a name="line.66"></a> -<span class="sourceLineNo">067</span> @Override<a name="line.67"></a> -<span class="sourceLineNo">068</span> protected void readTimestamp(ByteBuffer in) {<a name="line.68"></a> -<span class="sourceLineNo">069</span> in.get(timestamp);<a name="line.69"></a> -<span class="sourceLineNo">070</span> }<a name="line.70"></a> -<span class="sourceLineNo">071</span><a name="line.71"></a> -<span class="sourceLineNo">072</span> @Override<a name="line.72"></a> -<span class="sourceLineNo">073</span> void copyFrom(CompressionState state) {<a name="line.73"></a> -<span class="sourceLineNo">074</span> super.copyFrom(state);<a name="line.74"></a> -<span class="sourceLineNo">075</span> FastDiffCompressionState state2 = (FastDiffCompressionState) state;<a name="line.75"></a> -<span class="sourceLineNo">076</span> System.arraycopy(state2.timestamp, 0, timestamp, 0,<a name="line.76"></a> -<span class="sourceLineNo">077</span> KeyValue.TIMESTAMP_SIZE);<a name="line.77"></a> -<span class="sourceLineNo">078</span> prevTimestampOffset = state2.prevTimestampOffset;<a name="line.78"></a> -<span class="sourceLineNo">079</span> }<a name="line.79"></a> -<span class="sourceLineNo">080</span><a name="line.80"></a> -<span class="sourceLineNo">081</span> /**<a name="line.81"></a> -<span class="sourceLineNo">082</span> * Copies the first key/value from the given stream, and initializes<a name="line.82"></a> -<span class="sourceLineNo">083</span> * decompression state based on it. Assumes that we have already read key<a name="line.83"></a> -<span class="sourceLineNo">084</span> * and value lengths. Does not set {@link #qualifierLength} (not used by<a name="line.84"></a> -<span class="sourceLineNo">085</span> * decompression) or {@link #prevOffset} (set by the calle afterwards).<a name="line.85"></a> -<span class="sourceLineNo">086</span> */<a name="line.86"></a> -<span class="sourceLineNo">087</span> private void decompressFirstKV(ByteBuffer out, DataInputStream in)<a name="line.87"></a> -<span class="sourceLineNo">088</span> throws IOException {<a name="line.88"></a> -<span class="sourceLineNo">089</span> int kvPos = out.position();<a name="line.89"></a> -<span class="sourceLineNo">090</span> out.putInt(keyLength);<a name="line.90"></a> -<span class="sourceLineNo">091</span> out.putInt(valueLength);<a name="line.91"></a> -<span class="sourceLineNo">092</span> prevTimestampOffset = out.position() + keyLength -<a name="line.92"></a> -<span class="sourceLineNo">093</span> KeyValue.TIMESTAMP_TYPE_SIZE;<a name="line.93"></a> -<span class="sourceLineNo">094</span> ByteBufferUtils.copyFromStreamToBuffer(out, in, keyLength + valueLength);<a name="line.94"></a> -<span class="sourceLineNo">095</span> rowLength = out.getShort(kvPos + KeyValue.ROW_OFFSET);<a name="line.95"></a> -<span class="sourceLineNo">096</span> familyLength = out.get(kvPos + KeyValue.ROW_OFFSET +<a name="line.96"></a> -<span class="sourceLineNo">097</span> KeyValue.ROW_LENGTH_SIZE + rowLength);<a name="line.97"></a> -<span class="sourceLineNo">098</span> type = out.get(prevTimestampOffset + KeyValue.TIMESTAMP_SIZE);<a name="line.98"></a> -<span class="sourceLineNo">099</span> }<a name="line.99"></a> -<span class="sourceLineNo">100</span><a name="line.100"></a> -<span class="sourceLineNo">101</span> }<a name="line.101"></a> -<span class="sourceLineNo">102</span><a name="line.102"></a> -<span class="sourceLineNo">103</span> private void compressSingleKeyValue(<a name="line.103"></a> -<span class="sourceLineNo">104</span> FastDiffCompressionState previousState,<a name="line.104"></a> -<span class="sourceLineNo">105</span> FastDiffCompressionState currentState,<a name="line.105"></a> -<span class="sourceLineNo">106</span> OutputStream out, ByteBuffer in) throws IOException {<a name="line.106"></a> -<span class="sourceLineNo">107</span> currentState.prevOffset = in.position();<a name="line.107"></a> -<span class="sourceLineNo">108</span> int keyLength = in.getInt();<a name="line.108"></a> -<span class="sourceLineNo">109</span> int valueOffset =<a name="line.109"></a> -<span class="sourceLineNo">110</span> currentState.prevOffset + keyLength + KeyValue.ROW_OFFSET;<a name="line.110"></a> -<span class="sourceLineNo">111</span> int valueLength = in.getInt();<a name="line.111"></a> -<span class="sourceLineNo">112</span> byte flag = 0;<a name="line.112"></a> -<span class="sourceLineNo">113</span><a name="line.113"></a> -<span class="sourceLineNo">114</span> if (previousState.isFirst()) {<a name="line.114"></a> -<span class="sourceLineNo">115</span> // copy the key, there is no common prefix with none<a name="line.115"></a> -<span class="sourceLineNo">116</span> out.write(flag);<a name="line.116"></a> -<span class="sourceLineNo">117</span> ByteBufferUtils.putCompressedInt(out, keyLength);<a name="line.117"></a> -<span class="sourceLineNo">118</span> ByteBufferUtils.putCompressedInt(out, valueLength);<a name="line.118"></a> -<span class="sourceLineNo">119</span> ByteBufferUtils.putCompressedInt(out, 0);<a name="line.119"></a> -<span class="sourceLineNo">120</span><a name="line.120"></a> -<span class="sourceLineNo">121</span> currentState.readKey(in, keyLength, valueLength);<a name="line.121"></a> -<span class="sourceLineNo">122</span><a name="line.122"></a> -<span class="sourceLineNo">123</span> ByteBufferUtils.moveBufferToStream(out, in, keyLength + valueLength);<a name="line.123"></a> -<span class="sourceLineNo">124</span> } else {<a name="line.124"></a> -<span class="sourceLineNo">125</span> // find a common prefix and skip it<a name="line.125"></a> -<span class="sourceLineNo">126</span> int commonPrefix = ByteBufferUtils.findCommonPrefix(in, in.position(),<a name="line.126"></a> -<span class="sourceLineNo">127</span> previousState.prevOffset + KeyValue.ROW_OFFSET,<a name="line.127"></a> -<span class="sourceLineNo">128</span> Math.min(keyLength, previousState.keyLength) -<a name="line.128"></a> -<span class="sourceLineNo">129</span> KeyValue.TIMESTAMP_TYPE_SIZE);<a name="line.129"></a> -<span class="sourceLineNo">130</span><a name="line.130"></a> -<span class="sourceLineNo">131</span> currentState.readKey(in, keyLength, valueLength,<a name="line.131"></a> -<span class="sourceLineNo">132</span> commonPrefix, previousState);<a name="line.132"></a> +<span class="sourceLineNo">030</span>import org.apache.hadoop.classification.InterfaceAudience;<a name="line.30"></a> +<span class="sourceLineNo">031</span><a name="line.31"></a> +<span class="sourceLineNo">032</span>/**<a name="line.32"></a> +<span class="sourceLineNo">033</span> * Encoder similar to {@link DiffKeyDeltaEncoder} but supposedly faster.<a name="line.33"></a> +<span class="sourceLineNo">034</span> *<a name="line.34"></a> +<span class="sourceLineNo">035</span> * Compress using:<a name="line.35"></a> +<span class="sourceLineNo">036</span> * - store size of common prefix<a name="line.36"></a> +<span class="sourceLineNo">037</span> * - save column family once in the first KeyValue<a name="line.37"></a> +<span class="sourceLineNo">038</span> * - use integer compression for key, value and prefix (7-bit encoding)<a name="line.38"></a> +<span class="sourceLineNo">039</span> * - use bits to avoid duplication key length, value length<a name="line.39"></a> +<span class="sourceLineNo">040</span> * and type if it same as previous<a name="line.40"></a> +<span class="sourceLineNo">041</span> * - store in 3 bits length of prefix timestamp<a name="line.41"></a> +<span class="sourceLineNo">042</span> * with previous KeyValue's timestamp<a name="line.42"></a> +<span class="sourceLineNo">043</span> * - one bit which allow to omit value if it is the same<a name="line.43"></a> +<span class="sourceLineNo">044</span> *<a name="line.44"></a> +<span class="sourceLineNo">045</span> * Format:<a name="line.45"></a> +<span class="sourceLineNo">046</span> * - 1 byte: flag<a name="line.46"></a> +<span class="sourceLineNo">047</span> * - 1-5 bytes: key length (only if FLAG_SAME_KEY_LENGTH is not set in flag)<a name="line.47"></a> +<span class="sourceLineNo">048</span> * - 1-5 bytes: value length (only if FLAG_SAME_VALUE_LENGTH is not set in flag)<a name="line.48"></a> +<span class="sourceLineNo">049</span> * - 1-5 bytes: prefix length<a name="line.49"></a> +<span class="sourceLineNo">050</span> * - ... bytes: rest of the row (if prefix length is small enough)<a name="line.50"></a> +<span class="sourceLineNo">051</span> * - ... bytes: qualifier (or suffix depending on prefix length)<a name="line.51"></a> +<span class="sourceLineNo">052</span> * - 1-8 bytes: timestamp suffix<a name="line.52"></a> +<span class="sourceLineNo">053</span> * - 1 byte: type (only if FLAG_SAME_TYPE is not set in the flag)<a name="line.53"></a> +<span class="sourceLineNo">054</span> * - ... bytes: value (only if FLAG_SAME_VALUE is not set in the flag)<a name="line.54"></a> +<span class="sourceLineNo">055</span> *<a name="line.55"></a> +<span class="sourceLineNo">056</span> */<a name="line.56"></a> +<span class="sourceLineNo">057</span>@InterfaceAudience.Private<a name="line.57"></a> +<span class="sourceLineNo">058</span>public class FastDiffDeltaEncoder extends BufferedDataBlockEncoder {<a name="line.58"></a> +<span class="sourceLineNo">059</span> final int MASK_TIMESTAMP_LENGTH = (1 << 0) | (1 << 1) | (1 << 2);<a name="line.59"></a> +<span class="sourceLineNo">060</span> final int SHIFT_TIMESTAMP_LENGTH = 0;<a name="line.60"></a> +<span class="sourceLineNo">061</span> final int FLAG_SAME_KEY_LENGTH = 1 << 3;<a name="line.61"></a> +<span class="sourceLineNo">062</span> final int FLAG_SAME_VALUE_LENGTH = 1 << 4;<a name="line.62"></a> +<span class="sourceLineNo">063</span> final int FLAG_SAME_TYPE = 1 << 5;<a name="line.63"></a> +<span class="sourceLineNo">064</span> final int FLAG_SAME_VALUE = 1 << 6;<a name="line.64"></a> +<span class="sourceLineNo">065</span><a name="line.65"></a> +<span class="sourceLineNo">066</span> private static class FastDiffCompressionState extends CompressionState {<a name="line.66"></a> +<span class="sourceLineNo">067</span> byte[] timestamp = new byte[KeyValue.TIMESTAMP_SIZE];<a name="line.67"></a> +<span class="sourceLineNo">068</span> int prevTimestampOffset;<a name="line.68"></a> +<span class="sourceLineNo">069</span><a name="line.69"></a> +<span class="sourceLineNo">070</span> @Override<a name="line.70"></a> +<span class="sourceLineNo">071</span> protected void readTimestamp(ByteBuffer in) {<a name="line.71"></a> +<span class="sourceLineNo">072</span> in.get(timestamp);<a name="line.72"></a> +<span class="sourceLineNo">073</span> }<a name="line.73"></a> +<span class="sourceLineNo">074</span><a name="line.74"></a> +<span class="sourceLineNo">075</span> @Override<a name="line.75"></a> +<span class="sourceLineNo">076</span> void copyFrom(CompressionState state) {<a name="line.76"></a> +<span class="sourceLineNo">077</span> super.copyFrom(state);<a name="line.77"></a> +<span class="sourceLineNo">078</span> FastDiffCompressionState state2 = (FastDiffCompressionState) state;<a name="line.78"></a> +<span class="sourceLineNo">079</span> System.arraycopy(state2.timestamp, 0, timestamp, 0,<a name="line.79"></a> +<span class="sourceLineNo">080</span> KeyValue.TIMESTAMP_SIZE);<a name="line.80"></a> +<span class="sourceLineNo">081</span> prevTimestampOffset = state2.prevTimestampOffset;<a name="line.81"></a> +<span class="sourceLineNo">082</span> }<a name="line.82"></a> +<span class="sourceLineNo">083</span><a name="line.83"></a> +<span class="sourceLineNo">084</span> /**<a name="line.84"></a> +<span class="sourceLineNo">085</span> * Copies the first key/value from the given stream, and initializes<a name="line.85"></a> +<span class="sourceLineNo">086</span> * decompression state based on it. Assumes that we have already read key<a name="line.86"></a> +<span class="sourceLineNo">087</span> * and value lengths. Does not set {@link #qualifierLength} (not used by<a name="line.87"></a> +<span class="sourceLineNo">088</span> * decompression) or {@link #prevOffset} (set by the calle afterwards).<a name="line.88"></a> +<span class="sourceLineNo">089</span> */<a name="line.89"></a> +<span class="sourceLineNo">090</span> private void decompressFirstKV(ByteBuffer out, DataInputStream in)<a name="line.90"></a> +<span class="sourceLineNo">091</span> throws IOException {<a name="line.91"></a> +<span class="sourceLineNo">092</span> int kvPos = out.position();<a name="line.92"></a> +<span class="sourceLineNo">093</span> out.putInt(keyLength);<a name="line.93"></a> +<span class="sourceLineNo">094</span> out.putInt(valueLength);<a name="line.94"></a> +<span class="sourceLineNo">095</span> prevTimestampOffset = out.position() + keyLength -<a name="line.95"></a> +<span class="sourceLineNo">096</span> KeyValue.TIMESTAMP_TYPE_SIZE;<a name="line.96"></a> +<span class="sourceLineNo">097</span> ByteBufferUtils.copyFromStreamToBuffer(out, in, keyLength + valueLength);<a name="line.97"></a> +<span class="sourceLineNo">098</span> rowLength = out.getShort(kvPos + KeyValue.ROW_OFFSET);<a name="line.98"></a> +<span class="sourceLineNo">099</span> familyLength = out.get(kvPos + KeyValue.ROW_OFFSET +<a name="line.99"></a> +<span class="sourceLineNo">100</span> KeyValue.ROW_LENGTH_SIZE + rowLength);<a name="line.100"></a> +<span class="sourceLineNo">101</span> type = out.get(prevTimestampOffset + KeyValue.TIMESTAMP_SIZE);<a name="line.101"></a> +<span class="sourceLineNo">102</span> }<a name="line.102"></a> +<span class="sourceLineNo">103</span><a name="line.103"></a> +<span class="sourceLineNo">104</span> }<a name="line.104"></a> +<span class="sourceLineNo">105</span><a name="line.105"></a> +<span class="sourceLineNo">106</span> private void compressSingleKeyValue(<a name="line.106"></a> +<span class="sourceLineNo">107</span> FastDiffCompressionState previousState,<a name="line.107"></a> +<span class="sourceLineNo">108</span> FastDiffCompressionState currentState,<a name="line.108"></a> +<span class="sourceLineNo">109</span> OutputStream out, ByteBuffer in) throws IOException {<a name="line.109"></a> +<span class="sourceLineNo">110</span> currentState.prevOffset = in.position();<a name="line.110"></a> +<span class="sourceLineNo">111</span> int keyLength = in.getInt();<a name="line.111"></a> +<span class="sourceLineNo">112</span> int valueOffset =<a name="line.112"></a> +<span class="sourceLineNo">113</span> currentState.prevOffset + keyLength + KeyValue.ROW_OFFSET;<a name="line.113"></a> +<span class="sourceLineNo">114</span> int valueLength = in.getInt();<a name="line.114"></a> +<span class="sourceLineNo">115</span> byte flag = 0;<a name="line.115"></a> +<span class="sourceLineNo">116</span><a name="line.116"></a> +<span class="sourceLineNo">117</span> if (previousState.isFirst()) {<a name="line.117"></a> +<span class="sourceLineNo">118</span> // copy the key, there is no common prefix with none<a name="line.118"></a> +<span class="sourceLineNo">119</span> out.write(flag);<a name="line.119"></a> +<span class="sourceLineNo">120</span> ByteBufferUtils.putCompressedInt(out, keyLength);<a name="line.120"></a> +<span class="sourceLineNo">121</span> ByteBufferUtils.putCompressedInt(out, valueLength);<a name="line.121"></a> +<span class="sourceLineNo">122</span> ByteBufferUtils.putCompressedInt(out, 0);<a name="line.122"></a> +<span class="sourceLineNo">123</span><a name="line.123"></a> +<span class="sourceLineNo">124</span> currentState.readKey(in, keyLength, valueLength);<a name="line.124"></a> +<span class="sourceLineNo">125</span><a name="line.125"></a> +<span class="sourceLineNo">126</span> ByteBufferUtils.moveBufferToStream(out, in, keyLength + valueLength);<a name="line.126"></a> +<span class="sourceLineNo">127</span> } else {<a name="line.127"></a> +<span class="sourceLineNo">128</span> // find a common prefix and skip it<a name="line.128"></a> +<span class="sourceLineNo">129</span> int commonPrefix = ByteBufferUtils.findCommonPrefix(in, in.position(),<a name="line.129"></a> +<span class="sourceLineNo">130</span> previousState.prevOffset + KeyValue.ROW_OFFSET,<a name="line.130"></a> +<span class="sourceLineNo">131</span> Math.min(keyLength, previousState.keyLength) -<a name="line.131"></a> +<span class="sourceLineNo">132</span> KeyValue.TIMESTAMP_TYPE_SIZE);<a name="line.132"></a> <span class="sourceLineNo">133</span><a name="line.133"></a> -<span class="sourceLineNo">134</span> if (keyLength == previousState.keyLength) {<a name="line.134"></a> -<span class="sourceLineNo">135</span> flag |= FLAG_SAME_KEY_LENGTH;<a name="line.135"></a> -<span class="sourceLineNo">136</span> }<a name="line.136"></a> -<span class="sourceLineNo">137</span> if (valueLength == previousState.valueLength) {<a name="line.137"></a> -<span class="sourceLineNo">138</span> flag |= FLAG_SAME_VALUE_LENGTH;<a name="line.138"></a> +<span class="sourceLineNo">134</span> currentState.readKey(in, keyLength, valueLength,<a name="line.134"></a> +<span class="sourceLineNo">135</span> commonPrefix, previousState);<a name="line.135"></a> +<span class="sourceLineNo">136</span><a name="line.136"></a> +<span class="sourceLineNo">137</span> if (keyLength == previousState.keyLength) {<a name="line.137"></a> +<span class="sourceLineNo">138</span> flag |= FLAG_SAME_KEY_LENGTH;<a name="line.138"></a> <span class="sourceLineNo">139</span> }<a name="line.139"></a> -<span class="sourceLineNo">140</span> if (currentState.type == previousState.type) {<a name="line.140"></a> -<span class="sourceLineNo">141</span> flag |= FLAG_SAME_TYPE;<a name="line.141"></a> +<span class="sourceLineNo">140</span> if (valueLength == previousState.valueLength) {<a name="line.140"></a> +<span class="sourceLineNo">141</span> flag |= FLAG_SAME_VALUE_LENGTH;<a name="line.141"></a> <span class="sourceLineNo">142</span> }<a name="line.142"></a> -<span class="sourceLineNo">143</span><a name="line.143"></a> -<span class="sourceLineNo">144</span> int commonTimestampPrefix = findCommonTimestampPrefix(<a name="line.144"></a> -<span class="sourceLineNo">145</span> currentState, previousState);<a name="line.145"></a> -<span class="sourceLineNo">146</span> flag |= commonTimestampPrefix << SHIFT_TIMESTAMP_LENGTH;<a name="line.146"></a> -<span class="sourceLineNo">147</span><a name="line.147"></a> -<span class="sourceLineNo">148</span> // Check if current and previous values are the same. Compare value<a name="line.148"></a> -<span class="sourceLineNo">149</span> // length first as an optimization.<a name="line.149"></a> -<span class="sourceLineNo">150</span> if (valueLength == previousState.valueLength) {<a name="line.150"></a> -<span class="sourceLineNo">151</span> int previousValueOffset = previousState.prevOffset<a name="line.151"></a> -<span class="sourceLineNo">152</span> + previousState.keyLength + KeyValue.ROW_OFFSET;<a name="line.152"></a> -<span class="sourceLineNo">153</span> if (ByteBufferUtils.arePartsEqual(in,<a name="line.153"></a> -<span class="sourceLineNo">154</span> previousValueOffset, previousState.valueLength,<a name="line.154"></a> -<span class="sourceLineNo">155</span> valueOffset, valueLength)) {<a name="line.155"></a> -<span class="sourceLineNo">156</span> flag |= FLAG_SAME_VALUE;<a name="line.156"></a> -<span class="sourceLineNo">157</span> }<a name="line.157"></a> -<span class="sourceLineNo">158</span> }<a name="line.158"></a> -<span class="sourceLineNo">159</span><a name="line.159"></a> -<span class="sourceLineNo">160</span> out.write(flag);<a name="line.160"></a> -<span class="sourceLineNo">161</span> if ((flag & FLAG_SAME_KEY_LENGTH) == 0) {<a name="line.161"></a> -<span class="sourceLineNo">162</span> ByteBufferUtils.putCompressedInt(out, keyLength);<a name="line.162"></a> -<span class="sourceLineNo">163</span> }<a name="line.163"></a> -<span class="sourceLineNo">164</span> if ((flag & FLAG_SAME_VALUE_LENGTH) == 0) {<a name="line.164"></a> -<span class="sourceLineNo">165</span> ByteBufferUtils.putCompressedInt(out, valueLength);<a name="line.165"></a> +<span class="sourceLineNo">143</span> if (currentState.type == previousState.type) {<a name="line.143"></a> +<span class="sourceLineNo">144</span> flag |= FLAG_SAME_TYPE;<a name="line.144"></a> +<span class="sourceLineNo">145</span> }<a name="line.145"></a> +<span class="sourceLineNo">146</span><a name="line.146"></a> +<span class="sourceLineNo">147</span> int commonTimestampPrefix = findCommonTimestampPrefix(<a name="line.147"></a> +<span class="sourceLineNo">148</span> currentState, previousState);<a name="line.148"></a> +<span class="sourceLineNo">149</span> flag |= commonTimestampPrefix << SHIFT_TIMESTAMP_LENGTH;<a name="line.149"></a> +<span class="sourceLineNo">150</span><a name="line.150"></a> +<span class="sourceLineNo">151</span> // Check if current and previous values are the same. Compare value<a name="line.151"></a> +<span class="sourceLineNo">152</span> // length first as an optimization.<a name="line.152"></a> +<span class="sourceLineNo">153</span> if (valueLength == previousState.valueLength) {<a name="line.153"></a> +<span class="sourceLineNo">154</span> int previousValueOffset = previousState.prevOffset<a name="line.154"></a> +<span class="sourceLineNo">155</span> + previousState.keyLength + KeyValue.ROW_OFFSET;<a name="line.155"></a> +<span class="sourceLineNo">156</span> if (ByteBufferUtils.arePartsEqual(in,<a name="line.156"></a> +<span class="sourceLineNo">157</span> previousValueOffset, previousState.valueLength,<a name="line.157"></a> +<span class="sourceLineNo">158</span> valueOffset, valueLength)) {<a name="line.158"></a> +<span class="sourceLineNo">159</span> flag |= FLAG_SAME_VALUE;<a name="line.159"></a> +<span class="sourceLineNo">160</span> }<a name="line.160"></a> +<span class="sourceLineNo">161</span> }<a name="line.161"></a> +<span class="sourceLineNo">162</span><a name="line.162"></a> +<span class="sourceLineNo">163</span> out.write(flag);<a name="line.163"></a> +<span class="sourceLineNo">164</span> if ((flag & FLAG_SAME_KEY_LENGTH) == 0) {<a name="line.164"></a> +<span class="sourceLineNo">165</span> ByteBufferUtils.putCompressedInt(out, keyLength);<a name="line.165"></a> <span class="sourceLineNo">166</span> }<a name="line.166"></a> -<span class="sourceLineNo">167</span> ByteBufferUtils.putCompressedInt(out, commonPrefix);<a name="line.167"></a> -<span class="sourceLineNo">168</span><a name="line.168"></a> -<span class="sourceLineNo">169</span> ByteBufferUtils.skip(in, commonPrefix);<a name="line.169"></a> -<span class="sourceLineNo">170</span> if (commonPrefix < currentState.rowLength + KeyValue.ROW_LENGTH_SIZE) {<a name="line.170"></a> -<span class="sourceLineNo">171</span> // Previous and current rows are different. Copy the differing part of<a name="line.171"></a> -<span class="sourceLineNo">172</span> // the row, skip the column family, and copy the qualifier.<a name="line.172"></a> -<span class="sourceLineNo">173</span> ByteBufferUtils.moveBufferToStream(out, in,<a name="line.173"></a> -<span class="sourceLineNo">174</span> currentState.rowLength + KeyValue.ROW_LENGTH_SIZE - commonPrefix);<a name="line.174"></a> -<span class="sourceLineNo">175</span> ByteBufferUtils.skip(in, currentState.familyLength +<a name="line.175"></a> -<span class="sourceLineNo">176</span> KeyValue.FAMILY_LENGTH_SIZE);<a name="line.176"></a> -<span class="sourceLineNo">177</span> ByteBufferUtils.moveBufferToStream(out, in,<a name="line.177"></a> -<span class="sourceLineNo">178</span> currentState.qualifierLength);<a name="line.178"></a> -<span class="sourceLineNo">179</span> } else {<a name="line.179"></a> -<span class="sourceLineNo">180</span> // The common part includes the whole row. As the column family is the<a name="line.180"></a> -<span class="sourceLineNo">181</span> // same across the whole file, it will automatically be included in the<a name="line.181"></a> -<span class="sourceLineNo">182</span> // common prefix, so we need not special-case it here.<a name="line.182"></a> -<span class="sourceLineNo">183</span> int restKeyLength = keyLength - commonPrefix -<a name="line.183"></a> -<span class="sourceLineNo">184</span> KeyValue.TIMESTAMP_TYPE_SIZE;<a name="line.184"></a> -<span class="sourceLineNo">185</span> ByteBufferUtils.moveBufferToStream(out, in, restKeyLength);<a name="line.185"></a> -<span class="sourceLineNo">186</span> }<a name="line.186"></a> -<span class="sourceLineNo">187</span> ByteBufferUtils.skip(in, commonTimestampPrefix);<a name="line.187"></a> -<span class="sourceLineNo">188</span> ByteBufferUtils.moveBufferToStream(out, in,<a name="line.188"></a> -<span class="sourceLineNo">189</span> KeyValue.TIMESTAMP_SIZE - commonTimestampPrefix);<a name="line.189"></a> -<span class="sourceLineNo">190</span><a name="line.190"></a> -<span class="sourceLineNo">191</span> // Write the type if it is not the same as before.<a name="line.191"></a> -<span class="sourceLineNo">192</span> if ((flag & FLAG_SAME_TYPE) == 0) {<a name="line.192"></a> -<span class="sourceLineNo">193</span> out.write(currentState.type);<a name="line.193"></a> -<span class="sourceLineNo">194</span> }<a name="line.194"></a> -<span class="sourceLineNo">195</span><a name="line.195"></a> -<span class="sourceLineNo">196</span> // Write the value if it is not the same as before.<a name="line.196"></a> -<span class="sourceLineNo">197</span> if ((flag & FLAG_SAME_VALUE) == 0) {<a name="line.197"></a> -<span class="sourceLineNo">198</span> ByteBufferUtils.copyBufferToStream(out, in, valueOffset, valueLength);<a name="line.198"></a> -<span class="sourceLineNo">199</span> }<a name="line.199"></a> -<span class="sourceLineNo">200</span><a name="line.200"></a> -<span class="sourceLineNo">201</span> // Skip key type and value in the input buffer.<a name="line.201"></a> -<span class="sourceLineNo">202</span> ByteBufferUtils.skip(in, KeyValue.TYPE_SIZE + currentState.valueLength);<a name="line.202"></a> -<span class="sourceLineNo">203</span> }<a name="line.203"></a> -<span class="sourceLineNo">204</span> }<a name="line.204"></a> -<span class="sourceLineNo">205</span><a name="line.205"></a> -<span class="sourceLineNo">206</span> private int findCommonTimestampPrefix(FastDiffCompressionState left,<a name="line.206"></a> -<span class="sourceLineNo">207</span> FastDiffCompressionState right) {<a name="line.207"></a> -<span class="sourceLineNo">208</span> int prefixTimestamp = 0;<a name="line.208"></a> -<span class="sourceLineNo">209</span> while (prefixTimestamp < (KeyValue.TIMESTAMP_SIZE - 1) &&<a name="line.209"></a> -<span class="sourceLineNo">210</span> left.timestamp[prefixTimestamp]<a name="line.210"></a> -<span class="sourceLineNo">211</span> == right.timestamp[prefixTimestamp]) {<a name="line.211"></a> -<span class="sourceLineNo">212</span> prefixTimestamp++;<a name="line.212"></a> -<span class="sourceLineNo">213</span> }<a name="line.213"></a> -<span class="sourceLineNo">214</span> return prefixTimestamp; // has to be at most 7 bytes<a name="line.214"></a> -<span class="sourceLineNo">215</span> }<a name="line.215"></a> -<span class="sourceLineNo">216</span><a name="line.216"></a> -<span class="sourceLineNo">217</span> private void uncompressSingleKeyValue(DataInputStream source,<a name="line.217"></a> -<span class="sourceLineNo">218</span> ByteBuffer out, FastDiffCompressionState state)<a name="line.218"></a> -<span class="sourceLineNo">219</span> throws IOException, EncoderBufferTooSmallException {<a name="line.219"></a> -<span class="sourceLineNo">220</span> byte flag = source.readByte();<a name="line.220"></a> -<span class="sourceLineNo">221</span> int prevKeyLength = state.keyLength;<a name="line.221"></a> -<span class="sourceLineNo">222</span><a name="line.222"></a> -<span class="sourceLineNo">223</span> if ((flag & FLAG_SAME_KEY_LENGTH) == 0) {<a name="line.223"></a> -<span class="sourceLineNo">224</span> state.keyLength = ByteBufferUtils.readCompressedInt(source);<a name="line.224"></a> -<span class="sourceLineNo">225</span> }<a name="line.225"></a> -<span class="sourceLineNo">226</span> if ((flag & FLAG_SAME_VALUE_LENGTH) == 0) {<a name="line.226"></a> -<span class="sourceLineNo">227</span> state.valueLength = ByteBufferUtils.readCompressedInt(source);<a name="line.227"></a> +<span class="sourceLineNo">167</span> if ((flag & FLAG_SAME_VALUE_LENGTH) == 0) {<a name="line.167"></a> +<span class="sourceLineNo">168</span> ByteBufferUtils.putCompressedInt(out, valueLength);<a name="line.168"></a> +<span class="sourceLineNo">169</span> }<a name="line.169"></a> +<span class="sourceLineNo">170</span> ByteBufferUtils.putCompressedInt(out, commonPrefix);<a name="line.170"></a> +<span class="sourceLineNo">171</span><a name="line.171"></a> +<span class="sourceLineNo">172</span> ByteBufferUtils.skip(in, commonPrefix);<a name="line.172"></a> +<span class="sourceLineNo">173</span> if (commonPrefix < currentState.rowLength + KeyValue.ROW_LENGTH_SIZE) {<a name="line.173"></a> +<span class="sourceLineNo">174</span> // Previous and current rows are different. Copy the differing part of<a name="line.174"></a> +<span class="sourceLineNo">175</span> // the row, skip the column family, and copy the qualifier.<a name="line.175"></a> +<span class="sourceLineNo">176</span> ByteBufferUtils.moveBufferToStream(out, in,<a name="line.176"></a> +<span class="sourceLineNo">177</span> currentState.rowLength + KeyValue.ROW_LENGTH_SIZE - commonPrefix);<a name="line.177"></a> +<span class="sourceLineNo">178</span> ByteBufferUtils.skip(in, currentState.familyLength +<a name="line.178"></a> +<span class="sourceLineNo">179</span> KeyValue.FAMILY_LENGTH_SIZE);<a name="line.179"></a> +<span class="sourceLineNo">180</span> ByteBufferUtils.moveBufferToStream(out, in,<a name="line.180"></a> +<span class="sourceLineNo">181</span> currentState.qualifierLength);<a name="line.181"></a> +<span class="sourceLineNo">182</span> } else {<a name="line.182"></a> +<span class="sourceLineNo">183</span> // The common part includes the whole row. As the column family is the<a name="line.183"></a> +<span class="sourceLineNo">184</span> // same across the whole file, it will automatically be included in the<a name="line.184"></a> +<span class="sourceLineNo">185</span> // common prefix, so we need not special-case it here.<a name="line.185"></a> +<span class="sourceLineNo">186</span> int restKeyLength = keyLength - commonPrefix -<a name="line.186"></a> +<span class="sourceLineNo">187</span> KeyValue.TIMESTAMP_TYPE_SIZE;<a name="line.187"></a> +<span class="sourceLineNo">188</span> ByteBufferUtils.moveBufferToStream(out, in, restKeyLength);<a name="line.188"></a> +<span class="sourceLineNo">189</span> }<a name="line.189"></a> +<span class="sourceLineNo">190</span> ByteBufferUtils.skip(in, commonTimestampPrefix);<a name="line.190"></a> +<span class="sourceLineNo">191</span> ByteBufferUtils.moveBufferToStream(out, in,<a name="line.191"></a> +<span class="sourceLineNo">192</span> KeyValue.TIMESTAMP_SIZE - commonTimestampPrefix);<a name="line.192"></a> +<span class="sourceLineNo">193</span><a name="line.193"></a> +<span class="sourceLineNo">194</span> // Write the type if it is not the same as before.<a name="line.194"></a> +<span class="sourceLineNo">195</span> if ((flag & FLAG_SAME_TYPE) == 0) {<a name="line.195"></a> +<span class="sourceLineNo">196</span> out.write(currentState.type);<a name="line.196"></a> +<span class="sourceLineNo">197</span> }<a name="line.197"></a> +<span class="sourceLineNo">198</span><a name="line.198"></a> +<span class="sourceLineNo">199</span> // Write the value if it is not the same as before.<a name="line.199"></a> +<span class="sourceLineNo">200</span> if ((flag & FLAG_SAME_VALUE) == 0) {<a name="line.200"></a> +<span class="sourceLineNo">201</span> ByteBufferUtils.copyBufferToStream(out, in, valueOffset, valueLength);<a name="line.201"></a> +<span class="sourceLineNo">202</span> }<a name="line.202"></a> +<span class="sourceLineNo">203</span><a name="line.203"></a> +<span class="sourceLineNo">204</span> // Skip key type and value in the input buffer.<a name="line.204"></a> +<span class="sourceLineNo">205</span> ByteBufferUtils.skip(in, KeyValue.TYPE_SIZE + currentState.valueLength);<a name="line.205"></a> +<span class="sourceLineNo">206</span> }<a name="line.206"></a> +<span class="sourceLineNo">207</span> }<a name="line.207"></a> +<span class="sourceLineNo">208</span><a name="line.208"></a> +<span class="sourceLineNo">209</span> private int findCommonTimestampPrefix(FastDiffCompressionState left,<a name="line.209"></a> +<span class="sourceLineNo">210</span> FastDiffCompressionState right) {<a name="line.210"></a> +<span class="sourceLineNo">211</span> int prefixTimestamp = 0;<a name="line.211"></a> +<span class="sourceLineNo">212</span> while (prefixTimestamp < (KeyValue.TIMESTAMP_SIZE - 1) &&<a name="line.212"></a> +<span class="sourceLineNo">213</span> left.timestamp[prefixTimestamp]<a name="line.213"></a> +<span class="sourceLineNo">214</span> == right.timestamp[prefixTimestamp]) {<a name="line.214"></a> +<span class="sourceLineNo">215</span> prefixTimestamp++;<a name="line.215"></a> +<span class="sourceLineNo">216</span> }<a name="line.216"></a> +<span class="sourceLineNo">217</span> return prefixTimestamp; // has to be at most 7 bytes<a name="line.217"></a> +<span class="sourceLineNo">218</span> }<a name="line.218"></a> +<span class="sourceLineNo">219</span><a name="line.219"></a> +<span class="sourceLineNo">220</span> private void uncompressSingleKeyValue(DataInputStream source,<a name="line.220"></a> +<span class="sourceLineNo">221</span> ByteBuffer out, FastDiffCompressionState state)<a name="line.221"></a> +<span class="sourceLineNo">222</span> throws IOException, EncoderBufferTooSmallException {<a name="line.222"></a> +<span class="sourceLineNo">223</span> byte flag = source.readByte();<a name="line.223"></a> +<span class="sourceLineNo">224</span> int prevKeyLength = state.keyLength;<a name="line.224"></a> +<span class="sourceLineNo">225</span><a name="line.225"></a> +<span class="sourceLineNo">226</span> if ((flag & FLAG_SAME_KEY_LENGTH) == 0) {<a name="line.226"></a> +<span class="sourceLineNo">227</span> state.keyLength = ByteBufferUtils.readCompressedInt(source);<a name="line.227"></a> <span class="sourceLineNo">228</span> }<a name="line.228"></a> -<span class="sourceLineNo">229</span> int commonLength = ByteBufferUtils.readCompressedInt(source);<a name="line.229"></a> -<span class="sourceLineNo">230</span><a name="line.230"></a> -<span class="sourceLineNo">231</span> ByteBufferUtils.ensureSpace(out, state.keyLength + state.valueLength +<a name="line.231"></a> -<span class="sourceLineNo">232</span> KeyValue.ROW_OFFSET);<a name="line.232"></a> +<span class="sourceLineNo">229</span> if ((flag & FLAG_SAME_VALUE_LENGTH) == 0) {<a name="line.229"></a> +<span class="sourceLineNo">230</span> state.valueLength = ByteBufferUtils.readCompressedInt(source);<a name="line.230"></a> +<span class="sourceLineNo">231</span> }<a name="line.231"></a> +<span class="sourceLineNo">232</span> int commonLength = ByteBufferUtils.readCompressedInt(source);<a name="line.232"></a> <span class="sourceLineNo">233</span><a name="line.233"></a> -<span class="sourceLineNo">234</span> int kvPos = out.position();<a name="line.234"></a> -<span class="sourceLineNo">235</span><a name="line.235"></a> -<span class="sourceLineNo">236</span> if (!state.isFirst()) {<a name="line.236"></a> -<span class="sourceLineNo">237</span> // copy the prefix<a name="line.237"></a> -<span class="sourceLineNo">238</span> int common;<a name="line.238"></a> -<span class="sourceLineNo">239</span> int prevOffset;<a name="line.239"></a> -<span class="sourceLineNo">240</span><a name="line.240"></a> -<span class="sourceLineNo">241</span> if ((flag & FLAG_SAME_VALUE_LENGTH) == 0) {<a name="line.241"></a> -<span class="sourceLineNo">242</span> out.putInt(state.keyLength);<a name="line.242"></a> -<span class="sourceLineNo">243</span> out.putInt(state.valueLength);<a name="line.243"></a> -<span class="sourceLineNo">244</span> prevOffset = state.prevOffset + KeyValue.ROW_OFFSET;<a name="line.244"></a> -<span class="sourceLineNo">245</span> common = commonLength;<a name="line.245"></a> -<span class="sourceLineNo">246</span> } else {<a name="line.246"></a> -<span class="sourceLineNo">247</span> if ((flag & FLAG_SAME_KEY_LENGTH) != 0) {<a name="line.247"></a> -<span class="sourceLineNo">248</span> prevOffset = state.prevOffset;<a name="line.248"></a> -<span class="sourceLineNo">249</span> common = commonLength + KeyValue.ROW_OFFSET;<a name="line.249"></a> -<span class="sourceLineNo">250</span> } else {<a name="line.250"></a> -<span class="sourceLineNo">251</span> out.putInt(state.keyLength);<a name="line.251"></a> -<span class="sourceLineNo">252</span> prevOffset = state.prevOffset + KeyValue.KEY_LENGTH_SIZE;<a name="line.252"></a> -<span class="sourceLineNo">253</span> common = commonLength + KeyValue.KEY_LENGTH_SIZE;<a name="line.253"></a> -<span class="sourceLineNo">254</span> }<a name="line.254"></a> -<span class="sourceLineNo">255</span> }<a name="line.255"></a> -<span class="sourceLineNo">256</span><a name="line.256"></a> -<span class="sourceLineNo">257</span> ByteBufferUtils.copyFromBufferToBuffer(out, out, prevOffset, common);<a name="line.257"></a> -<span class="sourceLineNo">258</span><a name="line.258"></a> -<span class="sourceLineNo">259</span> // copy the rest of the key from the buffer<a name="line.259"></a> -<span class="sourceLineNo">260</span> int keyRestLength;<a name="line.260"></a> -<span class="sourceLineNo">261</span> if (commonLength < state.rowLength + KeyValue.ROW_LENGTH_SIZE) {<a name="line.261"></a> -<span class="sourceLineNo">262</span> // omit the family part of the key, it is always the same<a name="line.262"></a> -<span class="sourceLineNo">263</span> int rowWithSizeLength;<a name="line.263"></a> -<span class="sourceLineNo">264</span> int rowRestLength;<a name="line.264"></a> -<span class="sourceLineNo">265</span><a name="line.265"></a> -<span class="sourceLineNo">266</span> // check length of row<a name="line.266"></a> -<span class="sourceLineNo">267</span> if (commonLength < KeyValue.ROW_LENGTH_SIZE) {<a name="line.267"></a> -<span class="sourceLineNo">268</span> // not yet copied, do it now<a name="line.268"></a> -<span class="sourceLineNo">269</span> ByteBufferUtils.copyFromStreamToBuffer(out, source,<a name="line.269"></a> -<span class="sourceLineNo">270</span> KeyValue.ROW_LENGTH_SIZE - commonLength);<a name="line.270"></a> -<span class="sourceLineNo">271</span><a name="line.271"></a> -<span class="sourceLineNo">272</span> rowWithSizeLength = out.getShort(out.position() -<a name="line.272"></a> -<span class="sourceLineNo">273</span> KeyValue.ROW_LENGTH_SIZE) + KeyValue.ROW_LENGTH_SIZE;<a name="line.273"></a> -<span class="sourceLineNo">274</span> rowRestLength = rowWithSizeLength - KeyValue.ROW_LENGTH_SIZE;<a name="line.274"></a> -<span class="sourceLineNo">275</span> } else {<a name="line.275"></a> -<span class="sourceLineNo">276</span> // already in kvBuffer, just read it<a name="line.276"></a> -<span class="sourceLineNo">277</span> rowWithSizeLength = out.getShort(kvPos + KeyValue.ROW_OFFSET) +<a name="line.277"></a> -<span class="sourceLineNo">278</span> KeyValue.ROW_LENGTH_SIZE;<a name="line.278"></a> -<span class="sourceLineNo">279</span> rowRestLength = rowWithSizeLength - commonLength;<a name="line.279"></a> -<span class="sourceLineNo">280</span> }<a name="line.280"></a> -<span class="sourceLineNo">281</span><a name="line.281"></a> -<span class="sourceLineNo">282</span> // copy the rest of row<a name="line.282"></a> -<span class="sourceLineNo">283</span> ByteBufferUtils.copyFromStreamToBuffer(out, source, rowRestLength);<a name="line.283"></a> +<span class="sourceLineNo">234</span> ByteBufferUtils.ensureSpace(out, state.keyLength + state.valueLength +<a name="line.234"></a> +<span class="sourceLineNo">235</span> KeyValue.ROW_OFFSET);<a name="line.235"></a> +<span class="sourceLineNo">236</span><a name="line.236"></a> +<span class="sourceLineNo">237</span> int kvPos = out.position();<a name="line.237"></a> +<span class="sourceLineNo">238</span><a name="line.238"></a> +<span class="sourceLineNo">239</span> if (!state.isFirst()) {<a name="line.239"></a> +<span class="sourceLineNo">240</span> // copy the prefix<a name="line.240"></a> +<span class="sourceLineNo">241</span> int common;<a name="line.241"></a> +<span class="sourceLineNo">242</span> int prevOffset;<a name="line.242"></a> +<span class="sourceLineNo">243</span><a name="line.243"></a> +<span class="sourceLineNo">244</span> if ((flag & FLAG_SAME_VALUE_LENGTH) == 0) {<a name="line.244"></a> +<span class="sourceLineNo">245</span> out.putInt(state.keyLength);<a name="line.245"></a> +<span class="sourceLineNo">246</span> out.putInt(state.valueLength);<a name="line.246"></a> +<span class="sourceLineNo">247</span> prevOffset = state.prevOffset + KeyValue.ROW_OFFSET;<a name="line.247"></a> +<span class="sourceLineNo">248</span> common = commonLength;<a name="line.248"></a> +<span class="sourceLineNo">249</span> } else {<a name="line.249"></a> +<span class="sourceLineNo">250</span> if ((flag & FLAG_SAME_KEY_LENGTH) != 0) {<a name="line.250"></a> +<span class="sourceLineNo">251</span> prevOffset = state.prevOffset;<a name="line.251"></a> +<span class="sourceLineNo">252</span> common = commonLength + KeyValue.ROW_OFFSET;<a name="line.252"></a> +<span class="sourceLineNo">253</span> } else {<a name="line.253"></a> +<span class="sourceLineNo">254</span> out.putInt(state.keyLength);<a name="line.254"></a> +<span class="sourceLineNo">255</span> prevOffset = state.prevOffset + KeyValue.KEY_LENGTH_SIZE;<a name="line.255"></a> +<span class="sourceLineNo">256</span> common = commonLength + KeyValue.KEY_LENGTH_SIZE;<a name="line.256"></a> +<span class="sourceLineNo">257</span> }<a name="line.257"></a> +<span class="sourceLineNo">258</span> }<a name="line.258"></a> +<span class="sourceLineNo">259</span><a name="line.259"></a> +<span class="sourceLineNo">260</span> ByteBufferUtils.copyFromBufferToBuffer(out, out, prevOffset, common);<a name="line.260"></a> +<span class="sourceLineNo">261</span><a name="line.261"></a> +<span class="sourceLineNo">262</span> // copy the rest of the key from the buffer<a name="line.262"></a> +<span class="sourceLineNo">263</span> int keyRestLength;<a name="line.263"></a> +<span class="sourceLineNo">264</span> if (commonLength < state.rowLength + KeyValue.ROW_LENGTH_SIZE) {<a name="line.264"></a> +<span class="sourceLineNo">265</span> // omit the family part of the key, it is always the same<a name="line.265"></a> +<span class="sourceLineNo">266</span> int rowWithSizeLength;<a name="line.266"></a> +<span class="sourceLineNo">267</span> int rowRestLength;<a name="line.267"></a> +<span class="sourceLineNo">268</span><a name="line.268"></a> +<span class="sourceLineNo">269</span> // check length of row<a name="line.269"></a> +<span class="sourceLineNo">270</span> if (commonLength < KeyValue.ROW_LENGTH_SIZE) {<a name="line.270"></a> +<span class="sourceLineNo">271</span> // not yet copied, do it now<a name="line.271"></a> +<span class="sourceLineNo">272</span> ByteBufferUtils.copyFromStreamToBuffer(out, source,<a name="line.272"></a> +<span class="sourceLineNo">273</span> KeyValue.ROW_LENGTH_SIZE - commonLength);<a name="line.273"></a> +<span class="sourceLineNo">274</span><a name="line.274"></a> +<span class="sourceLineNo">275</span> rowWithSizeLength = out.getShort(out.position() -<a name="line.275"></a> +<span class="sourceLineNo">276</span> KeyValue.ROW_LENGTH_SIZE) + KeyValue.ROW_LENGTH_SIZE;<a name="line.276"></a> +<span class="sourceLineNo">277</span> rowRestLength = rowWithSizeLength - KeyValue.ROW_LENGTH_SIZE;<a name="line.277"></a> +<span class="sourceLineNo">278</span> } else {<a name="line.278"></a> +<span class="sourceLineNo">279</span> // already in kvBuffer, just read it<a name="line.279"></a> +<span class="sourceLineNo">280</span> rowWithSizeLength = out.getShort(kvPos + KeyValue.ROW_OFFSET) +<a name="line.280"></a> +<span class="sourceLineNo">281</span> KeyValue.ROW_LENGTH_SIZE;<a name="line.281"></a> +<span class="sourceLineNo">282</span> rowRestLength = rowWithSizeLength - commonLength;<a name="line.282"></a> +<span class="sourceLineNo">283</span> }<a name="line.283"></a> <span class="sourceLineNo">284</span><a name="line.284"></a> -<span class="sourceLineNo">285</span> // copy the column family<a name="line.285"></a> -<span class="sourceLineNo">286</span> ByteBufferUtils.copyFromBufferToBuffer(out, out,<a name="line.286"></a> -<span class="sourceLineNo">287</span> state.prevOffset + KeyValue.ROW_OFFSET + KeyValue.ROW_LENGTH_SIZE<a name="line.287"></a> -<span class="sourceLineNo">288</span> + state.rowLength, state.familyLength<a name="line.288"></a> -<span class="sourceLineNo">289</span> + KeyValue.FAMILY_LENGTH_SIZE);<a name="line.289"></a> -<span class="sourceLineNo">290</span> state.rowLength = (short) (rowWithSizeLength -<a name="line.290"></a> -<span class="sourceLineNo">291</span> KeyValue.ROW_LENGTH_SIZE);<a name="line.291"></a> -<span class="sourceLineNo">292</span><a name="line.292"></a> -<span class="sourceLineNo">293</span> keyRestLength = state.keyLength - rowWithSizeLength -<a name="line.293"></a> -<span class="sourceLineNo">294</span> state.familyLength -<a name="line.294"></a> -<span class="sourceLineNo">295</span> (KeyValue.FAMILY_LENGTH_SIZE + KeyValue.TIMESTAMP_TYPE_SIZE);<a name="line.295"></a> -<span class="sourceLineNo">296</span> } else {<a name="line.296"></a> -<span class="sourceLineNo">297</span> // prevRowWithSizeLength is the same as on previous row<a name="line.297"></a> -<span class="sourceLineNo">298</span> keyRestLength = state.keyLength - commonLength -<a name="line.298"></a> -<span class="sourceLineNo">299</span> KeyValue.TIMESTAMP_TYPE_SIZE;<a name="line.299"></a> -<span class="sourceLineNo">300</span> }<a name="line.300"></a> -<span class="sourceLineNo">301</span> // copy the rest of the key, after column family == column qualifier<a name="line.301"></a> -<span class="sourceLineNo">302</span> ByteBufferUtils.copyFromStreamToBuffer(out, source, keyRestLength);<a name="line.302"></a> -<span class="sourceLineNo">303</span><a name="line.303"></a> -<span class="sourceLineNo">304</span> // copy timestamp<a name="line.304"></a> -<span class="sourceLineNo">305</span> int prefixTimestamp =<a name="line.305"></a> -<span class="sourceLineNo">306</span> (flag & MASK_TIMESTAMP_LENGTH) >>> SHIFT_TIMESTAMP_LENGTH;<a name="line.306"></a> -<span class="sourceLineNo">307</span> ByteBufferUtils.copyFromBufferToBuffer(out, out,<a name="line.307"></a> -<span class="sourceLineNo">308</span> state.prevTimestampOffset, prefixTimestamp);<a name="line.308"></a> -<span class="sourceLineNo">309</span> state.prevTimestampOffset = out.position() - prefixTimestamp;<a name="line.309"></a> -<span class="sourceLineNo">310</span> ByteBufferUtils.copyFromStreamToBuffer(out, source,<a name="line.310"></a> -<span class="sourceLineNo">311</span> KeyValue.TIMESTAMP_SIZE - prefixTimestamp);<a name="line.311"></a> -<span class="sourceLineNo">312</span><a name="line.312"></a> -<span class="sourceLineNo">313</span> // copy the type and value<a name="line.313"></a> -<span class="sourceLineNo">314</span> if ((flag & FLAG_SAME_TYPE) != 0) {<a name="line.314"></a> -<span class="sourceLineNo">315</span> out.put(state.type);<a name="line.315"></a> -<span class="sourceLineNo">316</span> if ((flag & FLAG_SAME_VALUE) != 0) {<a name="line.316"></a> -<span class="sourceLineNo">317</span> ByteBufferUtils.copyFromBufferToBuffer(out, out, state.prevOffset +<a name="line.317"></a> -<span class="sourceLineNo">318</span> KeyValue.ROW_OFFSET + prevKeyLength, state.valueLength);<a name="line.318"></a> -<span class="sourceLineNo">319</span> } else {<a name="line.319"></a> -<span class="sourceLineNo">320</span> ByteBufferUtils.copyFromStreamToBuffer(out, source,<a name="line.320"></a> -<span class="sourceLineNo">321</span> state.valueLength);<a name="line.321"></a> -<span class="sourceLineNo">322</span> }<a name="line.322"></a> -<span class="sourceLineNo">323</span> } else {<a name="line.323"></a> -<span class="sourceLineNo">324</span> if ((flag & FLAG_SAME_VALUE) != 0) {<a name="line.324"></a> -<span class="sourceLineNo">325</span> ByteBufferUtils.copyFromStreamToBuffer(out, source,<a name="line.325"></a> -<span class="sourceLineNo">326</span> KeyValue.TYPE_SIZE);<a name="line.326"></a> -<span class="sourceLineNo">327</span> ByteBufferUtils.copyFromBufferToBuffer(out, out, state.prevOffset +<a name="line.327"></a> -<span class="sourceLineNo">328</span> KeyValue.ROW_OFFSET + prevKeyLength, state.valueLength);<a name="line.328"></a> -<span class="sourceLineNo">329</span> } else {<a name="line.329"></a> -<span class="sourceLineNo">330</span> ByteBufferUtils.copyFromStreamToBuffer(out, source,<a name="line.330"></a> -<span class="sourceLineNo">331</span> state.valueLength + KeyValue.TYPE_SIZE);<a name="line.331"></a> -<span class="sourceLineNo">332</span> }<a name="line.332"></a> -<span class="sourceLineNo">333</span> state.type = out.get(state.prevTimestampOffset +<a name="line.333"></a> -<span class="sourceLineNo">334</span> KeyValue.TIMESTAMP_SIZE);<a name="line.334"></a> -<span class="sourceLineNo">335</span> }<a name="line.335"></a> -<span class="sourceLineNo">336</span> } else { // this is the first element<a name="line.336"></a> -<span class="sourceLineNo">337</span> state.decompressFirstKV(out, source);<a name="line.337"></a> -<span class="sourceLineNo">338</span> }<a name="line.338"></a> -<span class="sourceLineNo">339</span><a name="line.339"></a> -<span class="sourceLineNo">340</span> state.prevOffset = kvPos;<a name="line.340"></a> -<span class="sourceLineNo">341</span> }<a name="line.341"></a> +<span class="sourceLineNo">285</span> // copy the rest of row<a name="line.285"></a> +<span class="sourceLineNo">286</span> ByteBufferUtils.copyFromStreamToBuffer(out, source, rowRestLength);<a name="line.286"></a> +<span class="sourceLineNo">287</span><a name="line.287"></a> +<span class="sourceLineNo">288</span> // copy the column family<a name="line.288"></a> +<span class="sourceLineNo">289</span> ByteBufferUtils.copyFromBufferToBuffer(out, out,<a name="line.289"></a> +<span class="sourceLineNo">290</span> state.prevOffset + KeyValue.ROW_OFFSET + KeyValue.ROW_LENGTH_SIZE<a name="line.290"></a> +<span class="sourceLineNo">291</span> + state.rowLength, state.familyLength<a name="line.291"></a> +<span class="sourceLineNo">292</span> + KeyValue.FAMILY_LENGTH_SIZE);<a name="line.292"></a> +<span class="sourceLineNo">293</span> state.rowLength = (short) (rowWithSizeLength -<a name="line.293"></a> +<span class="sourceLineNo">294</span> KeyValue.ROW_LENGTH_SIZE);<a name="line.294"></a> +<span class="sourceLineNo">295</span><a name="line.295"></a> +<span class="sourceLineNo">296</span> keyRestLength = state.keyLength - rowWithSizeLength -<a name="line.296"></a> +<span class="sourceLineNo">297</span> state.familyLength -<a name="line.297"></a> +<span class="sourceLineNo">298</span> (KeyValue.FAMILY_LENGTH_SIZE + KeyValue.TIMESTAMP_TYPE_SIZE);<a name="line.298"></a> +<span class="sourceLineNo">299</span> } else {<a name="line.299"></a> +<span class="sourceLineNo">300</span> // prevRowWithSizeLength is the same as on previous row<a name="line.300"></a> +<span class="sourceLineNo">301</span> keyRestLength = state.keyLength - commonLength -<a name="line.301"></a> +<span class="sourceLineNo">302</span> KeyValue.TIMESTAMP_TYPE_SIZE;<a name="line.302"></a> +<span class="sourceLineNo">303</span> }<a name="line.303"></a> +<span class="sourceLineNo">304</span> // copy the rest of the key, after column family == column qualifier<a name="line.304"></a> +<span class="sourceLineNo">305</span> ByteBufferUtils.copyFromStreamToBuffer(out, source, keyRestLength);<a name="line.305"></a> +<span class="sourceLineNo">306</span><a name="line.306"></a> +<span class="sourceLineNo">307</span> // copy timestamp<a name="line.307"></a> +<span class="sourceLineNo">308</span> int prefixTimestamp =<a name="line.308"></a> +<span class="sourceLineNo">309</span> (flag & MASK_TIMESTAMP_LENGTH) >>> SHIFT_TIMESTAMP_LENGTH;<a name="line.309"></a> +<span class="sourceLineNo">310</span> ByteBufferUtils.copyFromBufferToBuffer(out, out,<a name="line.310"></a> +<span class="sourceLineNo">311</span> state.prevTimestampOffset, prefixTimestamp);<a name="line.311"></a> +<span class="sourceLineNo">312</span> state.prevTimestampOffset = out.position() - prefixTimestamp;<a name="line.312"></a> +<span class="sourceLineNo">313</span> ByteBufferUtils.copyFromStreamToBuffer(out, source,<a name="line.313"></a> +<span class="sourceLineNo">314</span> KeyValue.TIMESTAMP_SIZE - prefixTimestamp);<a name="line.314"></a> +<span class="sourceLineNo">315</span><a name="line.315"></a> +<span class="sourceLineNo">316</span> // copy the type and value<a name="line.316"></a> +<span class="sourceLineNo">317</span> if ((flag & FLAG_SAME_TYPE) != 0) {<a name="line.317"></a> +<span class="sourceLineNo">318</span> out.put(state.type);<a name="line.318"></a> +<span class="sourceLineNo">319</span> if ((flag & FLAG_SAME_VALUE) != 0) {<a name="line.319"></a> +<span class="sourceLineNo">320</span> ByteBufferUtils.copyFromBufferToBuffer(out, out, state.prevOffset +<a name="line.320"></a> +<span class="sourceLineNo">321</span> KeyValue.ROW_OFFSET + prevKeyLength, state.valueLength);<a name="line.321"></a> +<span class="sourceLineNo">322</span> } else {<a name="line.322"></a> +<span class="sourceLineNo">323</span> ByteBufferUtils.copyFromStreamToBuffer(out, source,<a name="line.323"></a> +<span class="sourceLineNo">324</span> state.valueLength);<a name="line.324"></a> +<span class="sourceLineNo">325</span> }<a name="line.325"></a> +<span class="sourceLineNo">326</span> } else {<a name="line.326"></a> +<span class="sourceLineNo">327</span> if ((flag & FLAG_SAME_VALUE) != 0) {<a name="line.327"></a> +<span class="sourceLineNo">328</span> ByteBufferUtils.copyFromStreamToBuffer(out, source,<a name="line.328"></a> +<span class="sourceLineNo">329</span> KeyValue.TYPE_SIZE);<a name="line.329"></a> +<span class="sourceLineNo">330</span> ByteBufferUtils.copyFromBufferToBuffer(out, out, state.prevOffset +<a name="line.330"></a> +<span class="sourceLineNo">331</span> KeyValue.ROW_OFFSET + prevKeyLength, state.valueLength);<a name="line.331"></a> +<span class="sourceLineNo">332</span> } else {<a name="line.332"></a> +<span class="sourceLineNo">333</span> ByteBufferUtils.copyFromStreamToBuffer(out, source,<a name="line.333"></a> +<span class="sourceLineNo">334</span> state.valueLength + KeyValue.TYPE_SIZE);<a name="line.334"></a> +<span class="sourceLineNo">335</span> }<a name="line.335"></a> +<span class="sourceLineNo">336</span> state.type = out.get(state.prevTimestampOffset +<a name="line.336"></a> +<span class="sourceLineNo">337</span> KeyValue.TIMESTAMP_SIZE);<a name="line.337"></a> +<span class="sourceLineNo">338</span> }<a name="line.338"></a> +<span class="sourceLineNo">339</span> } else { // this is the first element<a name="line.339"></a> +<span class="sourceLineNo">340</span> state.decompressFirstKV(out, source);<a name="line.340"></a> +<span class="sourceLineNo">341</span> }<a name="line.341"></a> <span class="sourceLineNo">342</span><a name="line.342"></a> -<span class="sourceLineNo">343</span> @Override<a name="line.343"></a> -<span class="sourceLineNo">344</span> public void compressKeyValues(DataOutputStream out,<a name="line.344"></a> -<span class="sourceLineNo">345</span> ByteBuffer in, boolean includesMemstoreTS) throws IOException {<a name="line.345"></a> -<span class="sourceLineNo">346</span> in.rewind();<a name="line.346"></a> -<span class="sourceLineNo">347</span> ByteBufferUtils.putInt(out, in.limit());<a name="line.347"></a> -<span class="sourceLineNo">348</span> FastDiffCompressionState previousState = new FastDiffCompressionState();<a name="line.348"></a> -<span class="sourceLineNo">349</span> FastDiffCompressionState currentState = new FastDiffCompressionState();<a name="line.349"></a> -<span class="sourceLineNo">350</span> while (in.hasRemaining()) {<a name="line.350"></a> -<span class="sourceLineNo">351</span> compressSingleKeyValue(previousState, currentState,<a name="line.351"></a> -<span class="sourceLineNo">352</span> out, in);<a name="line.352"></a> -<span class="sourceLineNo">353</span> afterEncodingKeyValue(in, out, includesMemstoreTS);<a name="line.353"></a> -<span class="sourceLineNo">354</span><a name="line.354"></a> -<span class="sourceLineNo">355</span> // swap previousState <-> currentState<a name="line.355"></a> -<span class="sourceLineNo">356</span> FastDiffCompressionState tmp = previousState;<a name="line.356"></a> -<span class="sourceLineNo">357</span> previousState = currentState;<a name="line.357"></a> -<span class="sourceLineNo">358</span> currentState = tmp;<a name="line.358"></a> -<span class="sourceLineNo">359</span> }<a name="line.359"></a> -<span class="sourceLineNo">360</span> }<a name="line.360"></a> -<span class="sourceLineNo">361</span><a name="line.361"></a> -<span class="sourceLineNo">362</span> @Override<a name="line.362"></a> -<span class="sourceLineNo">363</span> public ByteBuffer uncompressKeyValues(DataInputStream source,<a name="line.363"></a> -<span class="sourceLineNo">364</span> int allocHeaderLength, int skipLastBytes, boolean includesMemstoreTS)<a name="line.364"></a> -<span class="sourceLineNo">365</span> throws IOException {<a name="line.365"></a> -<span class="sourceLineNo">366</span> int decompressedSize = source.readInt();<a name="line.366"></a> -<span class="sourceLineNo">367</span> ByteBuffer buffer = ByteBuffer.allocate(decompressedSize +<a name="line.367"></a> -<span class="sourceLineNo">368</span> allocHeaderLength);<a name="line.368"></a> -<span class="sourceLineNo">369</span> buffer.position(allocHeaderLength);<a name="line.369"></a> -<span class="sourceLineNo">370</span> FastDiffCompressionState state = new FastDiffCompressionState();<a name="line.370"></a> -<span class="sourceLineNo">371</span> while (source.available() > skipLastBytes) {<a name="line.371"></a> -<span class="sourceLineNo">372</span> uncompressSingleKeyValue(source, buffer, state);<a name="line.372"></a> -<span class="sourceLineNo">373</span> afterDecodingKeyValue(source, buffer, includesMemstoreTS);<a name="line.373"></a> -<span class="sourceLineNo">374</span> }<a name="line.374"></a> -<span class="sourceLineNo">375</span><a name="line.375"></a> -<span class="sourceLineNo">376</span> if (source.available() != skipLastBytes) {<a name="line.376"></a> -<span class="sourceLineNo">377</span> throw new IllegalStateException("Read too much bytes.");<a name="line.377"></a> -<span class="sourceLineNo">378</span> }<a name="line.378"></a> -<span class="sourceLineNo">379</span><a name="line.379"></a> -<span class="sourceLineNo">380</span> return buffer;<a name="line.380"></a> -<span class="sourceLineNo">381</span> }<a name="line.381"></a> +<span class="sourceLineNo">343</span> state.prevOffset = kvPos;<a name="line.343"></a> +<span class="sourceLineNo">344</span> }<a name="line.344"></a> +<span class="sourceLineNo">345</span><a name="line.345"></a> +<span class="sourceLineNo">346</span> @Override<a name="line.346"></a> +<span class="sourceLineNo">347</span> public void compressKeyValues(DataOutputStream out,<a name="line.347"></a> +<span class="sourceLineNo">348</span> ByteBuffer in, boolean includesMemstoreTS) throws IOException {<a name="line.348"></a> +<span class="sourceLineNo">349</span> in.rewind();<a name="line.349"></a> +<span class="sourceLineNo">350</span> ByteBufferUtils.putInt(out, in.limit());<a name="line.350"></a> +<span class="sourceLineNo">351</span> FastDiffCompressionState previousState = new FastDiffCompressionState();<a name="line.351"></a> +<span class="sourceLineNo">352</span> FastDiffCompressionState currentState = new FastDiffCompressionState();<a name="line.352"></a> +<span class="sourceLineNo">353</span> while (in.hasRemaining()) {<a name="line.353"></a> +<span class="sourceLineNo">354</span> compressSingleKeyValue(previousState, currentState,<a name="line.354"></a> +<span class="sourceLineNo">355</span> out, in);<a name="line.355"></a> +<span class="sourceLineNo">356</span> afterEncodingKeyValue(in, out, includesMemstoreTS);<a name="line.356"></a> +<span class="sourceLineNo">357</span><a name="line.357"></a> +<span class="sourceLineNo">358</span> // swap previousState <-> currentState<a name="line.358"></a> +<span class="sourceLineNo">359</span> FastDiffCompressionState tmp = previousState;<a name="line.359"></a> +<span class="sourceLineNo">360</span> previousState = currentState;<a name="line.360"></a> +<span class="sourceLineNo">361</span> currentState = tmp;<a name="line.361"></a> +<span class="sourceLineNo">362</span> }<a name="line.362"></a> +<span class="sourceLineNo">363</span> }<a name="line.363"></a> +<span class="sourceLineNo">364</span><a name="line.364"></a> +<span class="sourceLineNo">365</span> @Override<a name="line.365"></a> +<span class="sourceLineNo">366</span> public ByteBuffer uncompressKeyValues(DataInputStream source,<a name="line.366"></a> +<span class="sourceLineNo">367</span> int allocHeaderLength, int skipLastBytes, boolean includesMemstoreTS)<a name="line.367"></a> +<span class="sourceLineNo">368</span> throws IOException {<a name="line.368"></a> +<span class="sourceLineNo">369</span> int decompressedSize = source.readInt();<a name="line.369"></a> +<span class="sourceLineNo">370</span> ByteBuffer buffer = ByteBuffer.allocate(decompressedSize +<a name="line.370"></a> +<span class="sourceLineNo">371</span> allocHeaderLength);<a name="line.371"></a> +<span class="sourceLineNo">372</span> buffer.position(allocHeaderLength);<a name="line.372"></a> +<span class="sourceLineNo">373</span> FastDiffCompressionState state = new FastDiffCompressionState();<a name="line.373"></a> +<span class="sourceLineNo">374</span> while (source.available() > skipLastBytes) {<a name="line.374"></a> +<span class="sourceLineNo">375</span> uncompressSingleKeyValue(source, buffer, state);<a name="line.375"></a> +<span class="sourceLineNo">376</span> afterDecodingKeyValue(source, buffer, includesMemstoreTS);<a name="line.376"></a> +<span class="sourceLineNo">377</span> }<a name="line.377"></a> +<span class="sourceLineNo">378</span><a name="line.378"></a> +<span class="sourceLineNo">379</span> if (source.available() != skipLastBytes) {<a name="line.379"></a> +<span class="sourceLineNo">380</span> throw new 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name="line.397"></a> +<span class="sourceLineNo">398</span> @Override<a name="line.398"></a> +<span class="sourceLineNo">399</span> public String toString() {<a name="line.399"></a> +<span class="sourceLineNo">400</span> return FastDiffDeltaEncoder.class.getSimpleName();<a name="line.400"></a> +<span class="sourceLineNo">401</span> }<a name="line.401"></a> +<span class="sourceLineNo">402</span><a name="line.402"></a> +<span class="sourceLineNo">403</span> protected static class FastDiffSeekerSt
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