Author: imario
Date: Mon Mar 19 13:28:23 2007
New Revision: 520089
URL: http://svn.apache.org/viewvc?view=rev&rev=520089
Log:
VFS-90: wrapper to make a RandomAccessContent look like a
java.io.RandomAccessFile
Added:
jakarta/commons/proper/vfs/trunk/sandbox/src/main/java/org/apache/commons/vfs/RACRandomAccessFile.java
Added:
jakarta/commons/proper/vfs/trunk/sandbox/src/main/java/org/apache/commons/vfs/RACRandomAccessFile.java
URL:
http://svn.apache.org/viewvc/jakarta/commons/proper/vfs/trunk/sandbox/src/main/java/org/apache/commons/vfs/RACRandomAccessFile.java?view=auto&rev=520089
==============================================================================
---
jakarta/commons/proper/vfs/trunk/sandbox/src/main/java/org/apache/commons/vfs/RACRandomAccessFile.java
(added)
+++
jakarta/commons/proper/vfs/trunk/sandbox/src/main/java/org/apache/commons/vfs/RACRandomAccessFile.java
Mon Mar 19 13:28:23 2007
@@ -0,0 +1,157 @@
+/*
+ * Copyright 2002-2005 The Apache Software Foundation.
+ *
+ * Licensed 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.commons.vfs;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.RandomAccessFile;
+
+/**
+ * Encapsulates a [EMAIL PROTECTED] RandomAccessContent} instance, allowing it
to be used
+ * as a [EMAIL PROTECTED] RandomAccessFile} instance.
+ *
+ * @author Elifarley Callado Coelho Cruz <[EMAIL PROTECTED]>
+ * @version 1.1, $LastChangedRevision: 1163 $, $LastChangedDate: 2006-12-13
03:18:57 +0000 (Qua, 13 Dez 2006) $
+ */
+public class RACRandomAccessFile extends RandomAccessFile implements
RandomAccessContent
+{
+ private RandomAccessContent rac;
+ protected final byte[] singleByteBuf = new byte[1];
+
+ private static File createTempFile() throws IOException
+ {
+ return File.createTempFile("fraf", "");
+ }
+
+ private void deleteTempFile(File tempFile)
+ {
+ try
+ {
+ super.close();
+ }
+ catch (IOException ex)
+ {
+ throw new RuntimeException(ex);
+ }
+ finally
+ {
+ tempFile.delete();
+ }
+ }
+
+ public RACRandomAccessFile(RandomAccessContent rac) throws IOException
+ {
+ this(createTempFile());
+ this.rac = rac;
+ }
+
+ private RACRandomAccessFile(File tempFile) throws IOException
+ {
+ super(tempFile, "r");
+ deleteTempFile(tempFile);
+ }
+
+ public long getFilePointer() throws IOException
+ {
+ return this.rac.getFilePointer();
+ }
+
+ public void seek(long pos) throws IOException
+ {
+ this.rac.seek(pos);
+ }
+
+ public int skipBytes(int n) throws IOException
+ {
+ return this.rac.skipBytes(n);
+ }
+
+ public long length() throws IOException
+ {
+ return this.rac.length();
+ }
+
+ /* (non-Javadoc)
+ * @see org.ecc.base.io.FilterRandomAccessFile#setLength(long)
+ */
+ public void setLength(long newLength) throws IOException
+ {
+ throw new IOException("Underlying RandomAccessContent instance
length cannot be modified.");
+ }
+
+ public InputStream getInputStream() throws IOException
+ {
+ return this.rac.getInputStream();
+ }
+
+ public void close() throws IOException
+ {
+ this.rac.close();
+ }
+
+
+ /**
+ * @see java.io.RandomAccessFile#read(byte[])
+ */
+ public final int read(byte[] b) throws IOException
+ {
+ return read(b, 0, b.length);
+ }
+
+ /**
+ * @see java.io.RandomAccessFile#read()
+ */
+ public final int read() throws IOException
+ {
+ final byte[] buf = this.singleByteBuf;
+ int count = read(buf, 0, 1);
+ return count < 0 ? -1 : (buf[0] & 0xFF);
+ }
+
+ public int read(byte[] b, int off, int len) throws IOException
+ {
+ this.rac.readFully(b, off, len);
+ return len;
+ }
+
+ /**
+ * @see java.io.RandomAccessFile#write(int)
+ */
+ public final void write(int b) throws IOException
+ {
+ final byte[] buf = this.singleByteBuf;
+ buf[0] = (byte) b;
+ write(buf, 0, 1);
+ }
+
+ /**
+ * @see java.io.RandomAccessFile#write(byte[])
+ */
+ public final void write(byte[] b) throws IOException
+ {
+ write(b, 0, b.length);
+ }
+
+ /**
+ * @see java.io.RandomAccessFile#write(byte[],int,int)
+ */
+ public void write(byte[] b, int off, int len) throws IOException
+ {
+ this.rac.write(b, off, len);
+ }
+
+}
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