jeremias 2003/03/27 02:20:34 Added: src/java/org/apache/fop/pdf StreamCacheFactory.java Log: Factory for StreamCache instances. Supports a hint for the expected stream size so memory allocation optimizations can occur for the in-memory implementation. Revision Changes Path 1.1 xml-fop/src/java/org/apache/fop/pdf/StreamCacheFactory.java Index: StreamCacheFactory.java =================================================================== /* * $Id: StreamCache.java,v 1.3 2003/03/07 08:25:47 jeremias Exp $ * ============================================================================ * The Apache Software License, Version 1.1 * ============================================================================ * * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved. * * Redistribution and use in source and binary forms, with or without modifica- * tion, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowledgment: "This product includes software * developed by the Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowledgment may appear in the software itself, if * and wherever such third-party acknowledgments normally appear. * * 4. The names "FOP" and "Apache Software Foundation" must not be used to * endorse or promote products derived from this software without prior * written permission. For written permission, please contact * [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache", nor may * "Apache" appear in their name, without prior written permission of the * Apache Software Foundation. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ============================================================================ * * This software consists of voluntary contributions made by many individuals * on behalf of the Apache Software Foundation and was originally created by * James Tauber <[EMAIL PROTECTED]>. For more information on the Apache * Software Foundation, please see <http://www.apache.org/>. */ package org.apache.fop.pdf; import java.io.IOException; /** * This class is serves as a factory from */ public class StreamCacheFactory { private static boolean defaultCacheToFile = false; private static StreamCacheFactory fileInstance = null; private static StreamCacheFactory memoryInstance = null; private boolean cacheToFile = false; /** * Returns an instance of a StreamCacheFactory with the requested features. * @param cacheToFile True if file shall be cached using a temporary file * @return StreamCacheFactory the requested factory */ public static StreamCacheFactory getInstance(boolean cacheToFile) { if (cacheToFile) { if (fileInstance == null) { fileInstance = new StreamCacheFactory(true); } return fileInstance; } else { if (memoryInstance == null) { memoryInstance = new StreamCacheFactory(false); } return memoryInstance; } } /** * Returns an instance of a StreamCacheFactory depending on the default * setting for cacheToFile. * @return StreamCacheFactory the requested factory */ public static StreamCacheFactory getInstance() { return getInstance(defaultCacheToFile); } /** * Sets the global default for cacheToFile * @param cacheToFile True if stream caches should be held in files. */ public static void setDefaultCacheToFile(boolean cacheToFile) { defaultCacheToFile = cacheToFile; } /** * Creates a new StreamCacheFactory. * @param cacheToFile True if file shall be cached using a temporary file */ public StreamCacheFactory(boolean cacheToFile) { this.cacheToFile = cacheToFile; } /** * Get the correct implementation (based on cacheToFile) of * StreamCache. * @throws IOException if there is an IO error * @return a new StreamCache for caching streams */ public StreamCache createStreamCache() throws IOException { if (this.cacheToFile) { return new TempFileStreamCache(); } else { return new InMemoryStreamCache(); } } /** * Get the correct implementation (based on cacheToFile) of * StreamCache. * @param hintSize a hint about the approximate expected size of the buffer * @throws IOException if there is an IO error * @return a new StreamCache for caching streams */ public StreamCache createStreamCache(int hintSize) throws IOException { if (this.cacheToFile) { return new TempFileStreamCache(); } else { return new InMemoryStreamCache(hintSize); } } /** * Get the value of the global cacheToFile flag. * @return the current cache to file flag */ public boolean getCacheToFile() { return this.cacheToFile; } }
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