diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/BZip2Resource.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/BZip2Resource.java | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/BZip2Resource.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/BZip2Resource.java new file mode 100644 index 00000000..0c2dd4be --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/BZip2Resource.java @@ -0,0 +1,85 @@ +/* + * 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.tools.ant.types.resources; + +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; + +import org.apache.tools.bzip2.CBZip2InputStream; +import org.apache.tools.bzip2.CBZip2OutputStream; + +/** + * A Bzip2 compressed resource. + * + * <p>Wraps around another resource, delegates all queries to that + * other resource but uncompresses/compresses streams on the fly.</p> + * + * @since Ant 1.7 + */ +public class BZip2Resource extends CompressedResource { + private static final char[] MAGIC = new char[] {'B', 'Z'}; + + /** A no-arg constructor */ + public BZip2Resource() { + } + + /** + * Constructor with another resource to wrap. + * @param other the resource to wrap. + */ + public BZip2Resource(org.apache.tools.ant.types.ResourceCollection other) { + super(other); + } + + /** + * Decompress on the fly using {@link CBZip2InputStream}. + * @param in the stream to wrap. + * @return the wrapped stream. + * @throws IOException if there is a problem. + */ + protected InputStream wrapStream(InputStream in) throws IOException { + for (int i = 0; i < MAGIC.length; i++) { + if (in.read() != MAGIC[i]) { + throw new IOException("Invalid bz2 stream."); + } + } + return new CBZip2InputStream(in); + } + + /** + * Compress on the fly using {@link CBZip2OutputStream}. + * @param out the stream to wrap. + * @return the wrapped stream. + * @throws IOException if there is a problem. + */ + protected OutputStream wrapStream(OutputStream out) throws IOException { + for (int i = 0; i < MAGIC.length; i++) { + out.write(MAGIC[i]); + } + return new CBZip2OutputStream(out); + } + + /** + * Get the name of the compression method. + * @return the string "Bzip2". + */ + protected String getCompressionName() { + return "Bzip2"; + } +} |