/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2004 Sun
 * Microsystems, Inc. All Rights Reserved.
 */
package org.netbeans.core.output2;

import java.io.IOException;
import java.nio.ByteBuffer;

/**
 * Heap based implementation of the Storage interface, over a byte array.
 *
 */
class HeapStorage implements Storage {
    private boolean closed = true;
    private byte[] bytes = new byte[2048];
    private int size = 0;

    public Storage toFileMapStorage() throws IOException {
        FileMapStorage result = new FileMapStorage();
        result.write(getReadBuffer(0, size));
        return result;
    }

    public ByteBuffer getReadBuffer(int start, int length) throws IOException {
        return ByteBuffer.wrap(bytes, start, length);
    }

    public ByteBuffer getWriteBuffer(int length) throws IOException {
        return ByteBuffer.allocate(length);
    }

    public synchronized int write(ByteBuffer buf) throws IOException {
        closed = false;
        int oldSize = size;
        size += buf.limit() + 2;
        if (size > bytes.length) {
            byte[] oldBytes = bytes;
            bytes = new byte[Math.max (oldSize * 2, (buf.limit() * 2) + oldSize)]; 
            System.arraycopy (oldBytes, 0, bytes, 0, oldSize);
        }
        buf.flip();
        buf.get(bytes, oldSize, buf.limit());
        
        bytes[size-1] = '\n'; //NOI18N
        return oldSize;
    }

    public synchronized void dispose() {
        bytes = new byte[0];
        size = 0;
    }

    public synchronized int size() {
        return size;
    }

    public void flush() throws IOException {
        //N/A
    }

    public void close() throws IOException {
        closed = true;
    }

    public boolean isClosed() {
        return closed;  //To change body of implemented methods use File | Settings | File Templates.
    }
}