AOO410/main/jurt/com/sun/star/lib/uno/bridges/java_remote/XConnectionInputStream_Adapter.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
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 * 
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package com.sun.star.lib.uno.bridges.java_remote;


import java.io.IOException;
import java.io.InputStream;

import com.sun.star.connection.XConnection;


class XConnectionInputStream_Adapter extends InputStream {
	static private final boolean DEBUG = false;

	protected XConnection _xConnection;
	protected byte        _bytes[][] = new byte[1][];

	XConnectionInputStream_Adapter(XConnection xConnection) {
		if(xConnection == null)	throw new NullPointerException("the XConnection must not be null");

		if(DEBUG) System.err.println("#### " + getClass().getName()  + " - instantiated ");

		_xConnection = xConnection;
	}

	public int read() throws IOException {

		int len  ;

		try {
			len = _xConnection.read(_bytes, 1);
		}
		catch(com.sun.star.io.IOException ioException) {
			throw new IOException(ioException.toString());
		}

		if(DEBUG) System.err.println("#### " + getClass().getName()  + " - one byte read:" +  _bytes[0][0]);

		return len == 0 ? -1 : _bytes[0][0] & 0xff;
	}

	public int read(byte[] b, int off, int len) throws IOException {
// 		byte bytes[][] = new byte[1][];

		try {
			len = _xConnection.read(_bytes, len - off);
		}
		catch(com.sun.star.io.IOException ioException) {
			throw new IOException(ioException.toString());
		}

		System.arraycopy(_bytes[0], 0, b, off, len);

		return len == 0 ? -1 : len;
	}
}