/*
* Copyright 2011 the original author or authors.
*
* Licensed 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.gradle.api.internal.file.archive.compression;
import org.apache.tools.bzip2.CBZip2InputStream;
import org.apache.tools.bzip2.CBZip2OutputStream;
import org.gradle.api.internal.resources.URIBuilder;
import org.gradle.api.resources.ReadableResource;
import org.gradle.api.resources.ResourceException;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
public class Bzip2Archiver implements ReadableResource {
private final ReadableResource resource;
private final URI uri;
public Bzip2Archiver(ReadableResource resource) {
assert resource != null;
this.resource = resource;
this.uri = new URIBuilder(resource.getURI()).schemePrefix("bzip2:").build();
}
public static ArchiveOutputStreamFactory getCompressor() {
// this is not very beautiful but at some point we will
// get rid of ArchiveOutputStreamFactory in favor of the writable Resource
return new ArchiveOutputStreamFactory() {
public OutputStream createArchiveOutputStream(File destination) {
try {
OutputStream outStr = new FileOutputStream(destination);
outStr.write('B');
outStr.write('Z');
return new CBZip2OutputStream(outStr);
} catch (Exception e) {
String message = String.format("Unable to create bzip2 output stream for file %s", destination);
throw new RuntimeException(message, e);
}
}
};
}
public InputStream read() {
InputStream is = resource.read();
try {
// CBZip2InputStream expects the opening "BZ" to be skipped
byte[] skip = new byte[2];
is.read(skip);
return new CBZip2InputStream(is);
} catch (Exception e) {
String message = String.format("Unable to create bzip2 input stream for resource %s.", resource.getDisplayName());
throw new ResourceException(message, e);
}
}
public String getDisplayName() {
return resource.getDisplayName();
}
public URI getURI() {
return uri;
}
public String getBaseName() {
return resource.getBaseName();
}
}