| /* |
| * 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.myfaces.trinidadbuild.plugin.javascript.uixtools; |
| |
| import java.io.IOException; |
| |
| /** |
| * A buffer to hold Token objects. Tokens can be read from and written to this |
| * buffer as if it were a queue. it is thread safe. Best if a single thread is |
| * reading and a single thread is writing. |
| * @version $Name: $ ($Revision$) $Date$ |
| */ |
| public class TokenBuffer extends Queue implements TokenReader |
| { |
| |
| /** |
| * @param bufferSize the maximum size of this buffer. |
| */ |
| public TokenBuffer(int bufferSize) |
| { |
| super(bufferSize); |
| } |
| |
| public TokenBuffer() |
| { |
| this(100); |
| } |
| |
| /** |
| * reads a Token from this buffer. This method blocks until data is available |
| * @return null if there is no more data and this buffer has been closed. |
| * @see TokenReader |
| */ |
| public synchronized Token read() throws IOException, InterruptedException |
| { |
| Token tok; |
| try |
| { |
| tok = (Token) super.remove(); |
| } |
| catch (IllegalStateException e) |
| { |
| tok = null; |
| } |
| |
| if (tok==_EXCEPTION_TOKEN) |
| { |
| throw _getException(); |
| } |
| return tok; |
| } |
| |
| /** |
| * This method blocks if the buffer is full. |
| * @param tok the token to write to this buffer |
| */ |
| public synchronized void write(Token tok) throws InterruptedException |
| { |
| super.add(tok); |
| } |
| |
| public synchronized void write(IOException e) throws InterruptedException |
| { |
| _setException(e); |
| write(_EXCEPTION_TOKEN); |
| close(); |
| } |
| |
| private synchronized void _setException(IOException e) |
| { |
| _exception = e; |
| } |
| |
| private synchronized IOException _getException() |
| { |
| return _exception; |
| } |
| |
| private IOException _exception = null; |
| |
| private static final Token _EXCEPTION_TOKEN = new Token(-1, 0); |
| } |