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Copy pathSeekableByteArrayOutputStream.java
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86 lines (77 loc) · 2.91 KB
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/*
* Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
*
* Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
* that is described in this document. In particular, and without limitation, these intellectual property
* rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
* more additional patents or pending patent applications in the U.S. and in other countries.
*
* U.S. Government Rights - Commercial software. Government users are subject to the Sun
* Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
* supplements.
*
* Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
* registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
* are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
* U.S. and other countries.
*
* UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
* Company, Ltd.
*/
package com.sun.max.io;
import java.io.*;
/**
* A {@link ByteArrayOutputStream} that can have its write position {@linkplain #seek(int) updated}.
*
* @author Doug Simon
*/
public class SeekableByteArrayOutputStream extends ByteArrayOutputStream {
private int highestCount;
/**
* @see ByteArrayOutputStream#ByteArrayOutputStream()
*/
public SeekableByteArrayOutputStream() {
}
/**
* @see ByteArrayOutputStream#ByteArrayOutputStream(int)
*/
public SeekableByteArrayOutputStream(int size) {
super(size);
}
/**
* Updates the write position of this stream. The stream can only be repositioned between 0 and the
* {@linkplain #endOfStream() end of the stream}.
*
* @param index
* the index to which the write position of this stream will be set
* @throws IllegalArgumentException
* if {@code index > highestSeekIndex()}
*/
public void seek(int index) throws IllegalArgumentException {
if (endOfStream() < index) {
throw new IllegalArgumentException();
}
count = index;
}
/**
* Gets the index one past the highest index that has been written to in this stream.
*/
public int endOfStream() {
if (highestCount < count) {
highestCount = count;
}
return highestCount;
}
@Override
public void reset() {
super.reset();
highestCount = 0;
}
/**
* Copies the {@code length} bytes of this byte array output stream starting at {@code offset} to {@code buf}
* starting at {@code bufOffset}.
*/
public void copyTo(int offset, byte[] toBuffer, int toOffset, int length) {
System.arraycopy(this.buf, offset, toBuffer, toOffset, length);
}
}