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The source code/* * Copyright (C) The Apache Software Foundation. All rights reserved. * * This software is published under the terms of the Apache Software * License version 1.1, a copy of which has been included with this * distribution in the LICENSE.txt file. */ package org.apache.log4j.lf5.util; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; /** * Provides utility methods for input and output streams. * * @author Richard Wan */ // Contributed by ThoughtWorks Inc. public abstract class StreamUtils { //-------------------------------------------------------------------------- // Constants: //-------------------------------------------------------------------------- /** * Default value is 2048. */ public static final int DEFAULT_BUFFER_SIZE = 2048; //-------------------------------------------------------------------------- // Protected Variables: //-------------------------------------------------------------------------- //-------------------------------------------------------------------------- // Private Variables: //-------------------------------------------------------------------------- //-------------------------------------------------------------------------- // Constructors: //-------------------------------------------------------------------------- //-------------------------------------------------------------------------- // Public Methods: //-------------------------------------------------------------------------- /** * Copies information from the input stream to the output stream using * a default buffer size of 2048 bytes. * @throws java.io.IOException */ public static void copy(InputStream input, OutputStream output) throws IOException { copy(input, output, DEFAULT_BUFFER_SIZE); } /** * Copies information from the input stream to the output stream using * the specified buffer size * @throws java.io.IOException */ public static void copy(InputStream input, OutputStream output, int bufferSize) throws IOException { byte[] buf = new byte[bufferSize]; int bytesRead = input.read(buf); while (bytesRead != -1) { output.write(buf, 0, bytesRead); bytesRead = input.read(buf); } output.flush(); } /** * Copies information between specified streams and then closes * both of the streams. * @throws java.io.IOException */ public static void copyThenClose(InputStream input, OutputStream output) throws IOException { copy(input, output); input.close(); output.close(); } /** * @returns a byte[] containing the information contained in the * specified InputStream. * @throws java.io.IOException */ public static byte[] getBytes(InputStream input) throws IOException { ByteArrayOutputStream result = new ByteArrayOutputStream(); copy(input, result); result.close(); return result.toByteArray(); } //-------------------------------------------------------------------------- // Protected Methods: //-------------------------------------------------------------------------- //-------------------------------------------------------------------------- // Private Methods: //-------------------------------------------------------------------------- //-------------------------------------------------------------------------- // Nested Top-Level Classes or Interfaces //-------------------------------------------------------------------------- } |
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