Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/164#discussion_r10785965
--- Diff:
mllib/src/main/java/org/apache/spark/mllib/input/BatchFilesRecordReader.java ---
@@ -0,0 +1,109 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.input;
+
+import java.io.IOException;
+
+import com.google.common.io.Closeables;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.FSDataInputStream;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.io.IOUtils;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.InputSplit;
+import org.apache.hadoop.mapreduce.lib.input.CombineFileSplit;
+import org.apache.hadoop.mapreduce.RecordReader;
+import org.apache.hadoop.mapreduce.TaskAttemptContext;
+
+/**
+ * Reads an entire file out in bytes format in <filename, content> format.
+ */
+
+public class BatchFilesRecordReader extends RecordReader<String, Text> {
+ private long startOffset;
+ private int length;
+ private Path path;
+
+ private String key = null;
+ private Text value = null;
+
+ private boolean processed = false;
+
+ private FileSystem fs;
+
+ public BatchFilesRecordReader(
+ CombineFileSplit split,
+ TaskAttemptContext context,
+ Integer index)
+ throws IOException {
+ path = split.getPath(index);
+ startOffset = split.getOffset(index);
+ length = (int) split.getLength(index);
+ fs = path.getFileSystem(context.getConfiguration());
+ }
+
+ @Override
+ public void initialize(InputSplit arg0, TaskAttemptContext arg1)
+ throws IOException, InterruptedException {
+ }
+
+ @Override
+ public void close() throws IOException {
+ }
+
+ @Override
+ public float getProgress() throws IOException {
+ return processed ? 1.0f : 0.0f;
+ }
+
+ @Override
+ public String getCurrentKey() throws IOException, InterruptedException
{
+ return key;
+ }
+
+ @Override
+ public Text getCurrentValue() throws IOException, InterruptedException{
+ return value;
+ }
+
+ @Override
+ public boolean nextKeyValue() throws IOException {
+ if (!processed) {
--- End diff --
So it only reads the first file and throws away the rest?
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