Java tutorial
/* * 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.ant.compress.taskdefs; import java.io.InputStream; import java.io.IOException; import java.io.OutputStream; import java.util.HashMap; import java.util.Map; import org.apache.ant.compress.resources.CommonsCompressCompressorResource; import org.apache.ant.compress.resources.Pack200Resource; import org.apache.ant.compress.util.CompressorStreamFactory; import org.apache.commons.compress.compressors.CompressorInputStream; import org.apache.commons.compress.compressors.CompressorOutputStream; import org.apache.commons.compress.compressors.pack200.Pack200CompressorOutputStream; import org.apache.commons.compress.compressors.pack200.Pack200Strategy; import org.apache.tools.ant.types.EnumeratedAttribute; import org.apache.tools.ant.types.Environment; import org.apache.tools.ant.types.Resource; /** * Compresses using pack200. * @since Apache Compress Antlib 1.1 */ public final class Pack200 extends PackBase { private Pack200StrategyEnum strategy = Pack200StrategyEnum.IN_MEMORY; private final Map/*<String, String>*/ properties = new HashMap(); public Pack200() { super(new PackBase.ResourceWrapper() { public CommonsCompressCompressorResource wrap(Resource dest) { return new Pack200Resource(dest); } }); setFactory(new CompressorStreamFactory() { public CompressorOutputStream getCompressorStream(OutputStream stream) throws IOException { return new Pack200CompressorOutputStream(stream, strategy.getStrategy(), properties); } public CompressorInputStream getCompressorStream(InputStream stream) throws IOException { throw new UnsupportedOperationException(); } }); } /** * Whether to cache archive data in memory (the default) or a * temporary file. */ public void setPack200Strategy(Pack200StrategyEnum s) { strategy = s; } /** * Sets a property for the Pack200 packer. */ public void addConfiguredProperty(Environment.Variable prop) { prop.validate(); properties.put(prop.getKey(), prop.getValue()); } /** * Pack200Strategy to use: cache in memory or use a temporary file. * * @since Commons Compress 1.1 */ public static final class Pack200StrategyEnum extends EnumeratedAttribute { private static final Map STRATEGIES = new HashMap(); private static final String IN_MEMORY_KEY = "in-memory"; private static final String TEMP_FILE_KEY = "temp-file"; static { STRATEGIES.put(IN_MEMORY_KEY, Pack200Strategy.IN_MEMORY); STRATEGIES.put(TEMP_FILE_KEY, Pack200Strategy.TEMP_FILE); } public String[] getValues() { return new String[] { IN_MEMORY_KEY, TEMP_FILE_KEY }; } static final Pack200StrategyEnum IN_MEMORY = new Pack200StrategyEnum(IN_MEMORY_KEY); private Pack200StrategyEnum(String name) { setValue(name); } public Pack200StrategyEnum() { } public Pack200Strategy getStrategy() { return (Pack200Strategy) STRATEGIES.get(getValue()); } } }