RamFileOutputStream.java

/*
 * 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.commons.vfs.provider.ram;

import java.io.IOException;
import java.io.OutputStream;

import org.apache.commons.vfs.FileSystemException;

/**
 * OutputStream to a RamFile
 */
public class RamFileOutputStream extends OutputStream
{

	/**
	 * File
	 */
	protected RamFileObject file;

	/**
	 * buffer
	 */
	protected byte buffer1[] = new byte[1];

	protected boolean closed = false;

	private IOException exc;

	/**
	 * @param mode
	 */
	public RamFileOutputStream(RamFileObject file)
	{
		super();
		this.file = file;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.io.DataOutput#write(byte[], int, int)
	 */
	public void write(byte[] b, int off, int len) throws IOException
	{
		int size = this.file.getData().size();
		int newSize = this.file.getData().size() + len;
		// Store the Exception in order to notify the client again on close()
		try
		{
			this.file.resize(newSize);
		}
		catch (IOException e)
		{
			this.exc = e;
			throw e;
		}
		System.arraycopy(b, off, this.file.getData().getBuffer(), size, len);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.io.DataOutput#write(int)
	 */
	public void write(int b) throws IOException
	{
		buffer1[0] = (byte) b;
		this.write(buffer1);
	}

	public void flush() throws IOException
	{
	}

	public void close() throws IOException
	{
		if (closed)
		{
			return;
		}
		// Notify on close that there was an IOException while writing
		if (exc != null)
		{
			throw exc;
		}
		try
		{
			this.closed = true;
			// Close the
			this.file.endOutput();
		}
		catch (Exception e)
		{
			throw new FileSystemException(e);
		}
	}

}