com.intel.bluetooth.obex.OBEXOperationOutputStream Maven / Gradle / Ivy

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/**
 *  BlueCove - Java library for Bluetooth
 *  Copyright (C) 2007 Vlad Skarzhevskyy
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  @version $Id: OBEXOperationOutputStream.java 893 2007-08-09 21:10:27Z skarzhevskyy $
 */
package com.intel.bluetooth.obex;

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

class OBEXOperationOutputStream extends OutputStream {

	private final OBEXOperationDelivery operation;

	private byte[] buffer; 
	
	private int bufferLength;
	
	private Object lock = new Object();
	
	private boolean isClosed = false;
	
	OBEXOperationOutputStream(int mtu, OBEXOperationDelivery op) {
		this.operation = op;
		buffer = new byte[mtu - OBEXOperationCodes.OBEX_MTU_HEADER_RESERVE];
		bufferLength = 0;
	}
	     
    public void write(int i) throws IOException {
		write(new byte[] {(byte)i}, 0, 1);
	}
    
    public void write(byte b[], int off, int len) throws IOException {
		if (this.operation.isClosed() || isClosed) {
			throw new IOException("stream closed");
		}
		if (b == null) {
			throw new NullPointerException();
		} else if ((off < 0) || (len < 0) || ((off + len) > b.length)) {
			throw new IndexOutOfBoundsException();
		} else if (len == 0) {
			return;
		}

		synchronized (lock) {
			int written = 0;
			while (written < len) {
				int avalable = (buffer.length - bufferLength);
				if ((len - written) < avalable) {
					avalable = len - written;
				}
				System.arraycopy(b, off + written, buffer, bufferLength, avalable);
				bufferLength += avalable;
				written += avalable;
				if (bufferLength == buffer.length) {
					this.operation.deliverPacket(false, buffer);
					bufferLength = 0;
				}
			}
		}
	}
    
    public void flush() throws IOException {
		deliverBuffer(false);
    }
    
    void deliverBuffer(boolean finalPacket) throws IOException {
		synchronized (lock) {
			byte[] b = new byte[bufferLength];
			System.arraycopy(buffer, 0, b, 0, bufferLength);
			this.operation.deliverPacket(finalPacket, b);
			bufferLength = 0;
		}
	}

    void abort() {
    	synchronized (lock) {
			isClosed = true;
    	}
    }
    
	public void close() throws IOException {
		if (!isClosed) {
			synchronized (lock) {
				isClosed = true;
				if (!operation.isClosed()) {
					deliverBuffer(true);
				}
			}
		}
	}
	
}