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The Apache Commons IO library contains utility classes, stream implementations, file filters, file comparators, endian transformation classes, and much more.

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/*
 * 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.Writer;

/**
 * Broken writer. This writer always throws an {@link IOException} from
 * all {@link Writer} methods.
 * 

* This class is mostly useful for testing error handling in code that uses a * writer. * * @since 2.0 */ public class BrokenWriter extends Writer { /** * The exception that is thrown by all methods of this class. */ private final IOException exception; /** * Creates a new writer that always throws the given exception. * * @param exception the exception to be thrown */ public BrokenWriter(final IOException exception) { this.exception = exception; } /** * Creates a new writer that always throws an {@link IOException} */ public BrokenWriter() { this(new IOException("Broken writer")); } /** * Throws the configured exception. * * @param cbuf ignored * @param off ignored * @param len ignored * @throws IOException always thrown */ @Override public void write(final char[] cbuf, final int off, final int len) throws IOException { throw exception; } /** * Throws the configured exception. * * @throws IOException always thrown */ @Override public void flush() throws IOException { throw exception; } /** * Throws the configured exception. * * @throws IOException always thrown */ @Override public void close() throws IOException { throw exception; } }





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