| /* |
| * 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.io.output; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| /** |
| * Closed output stream. This stream throws an exception on all attempts to |
| * write something to the stream. |
| * <p> |
| * Typically uses of this class include testing for corner cases in methods |
| * that accept an output stream and acting as a sentinel value instead of |
| * a <code>null</code> output stream. |
| * |
| * @version $Id: ClosedOutputStream.java 601751 2007-12-06 14:55:45Z niallp $ |
| * @since Commons IO 1.4 |
| */ |
| public class ClosedOutputStream extends OutputStream { |
| |
| /** |
| * A singleton. |
| */ |
| public static final ClosedOutputStream CLOSED_OUTPUT_STREAM = new ClosedOutputStream(); |
| |
| /** |
| * Throws an {@link IOException} to indicate that the stream is closed. |
| * |
| * @param b ignored |
| * @throws IOException always thrown |
| */ |
| public void write(int b) throws IOException { |
| throw new IOException("write(" + b + ") failed: stream is closed"); |
| } |
| |
| } |