org.apache.ant.compress.util.SevenZStreamFactory Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of ant-compress Show documentation
Provides tasks and types that deal with AR, CPIO, TAR, DUMP and ZIP archives as well as BZIP2, PACK200, GZIP and XZ compressed files based on Apache Commons Compress.
There is a newer version: 1.5
Show newest version
/*
 *  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.util;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.ArchiveInputStream;
import org.apache.commons.compress.archivers.ArchiveOutputStream;
import org.apache.commons.compress.archivers.sevenz.SevenZMethod;
import org.apache.commons.compress.archivers.sevenz.SevenZOutputFile;
import org.apache.commons.compress.archivers.sevenz.SevenZFile;

/**
 * @since Apache Compress Antlib 1.3
 */
public class SevenZStreamFactory implements FileAwareArchiveStreamFactory {

    /**
     * @param stream the stream to read from, should be buffered
     * @param encoding the encoding of the entry names
     */
    public ArchiveInputStream getArchiveStream(InputStream stream,
                                               String encoding)
        throws IOException {
        throw new UnsupportedOperationException("only file-based archives can be read");
    }

    /**
     * @param stream the stream to write to, should be buffered
     * @param encoding the encoding of the entry names
     */
    public ArchiveOutputStream getArchiveStream(OutputStream stream,
                                                String encoding)
        throws IOException {
        throw new UnsupportedOperationException("only file-based archives can be written");
    }

    /**
     * @param file the file to read from
     * @param encoding the encoding of the entry names
     */
    public ArchiveInputStream getArchiveInputStream(File file,
                                                    String encoding)
        throws IOException {
        return new SevenZArchiveInputStream(file);
    }

    /**
     * @param file the file to write to
     * @param encoding the encoding of the entry names
     */
    public ArchiveOutputStream getArchiveOutputStream(File file,
                                                      String encoding)
        throws IOException {
        return new SevenZArchiveOutputStream(file);
    }

    /**
     * Not really a stream but provides an ArchiveInputStream
     * compatible interface over SevenZFile.
     */
    private static class SevenZArchiveInputStream extends ArchiveInputStream {

        private final SevenZFile zipFile;

        public SevenZArchiveInputStream(File file) throws IOException {
            zipFile = new SevenZFile(file);
        }

        public ArchiveEntry getNextEntry() throws IOException {
            return zipFile.getNextEntry();
        }

        public int read(byte[] b, int off, int len) throws IOException {
            return zipFile.read(b, off, len);
        }

        public void close() throws IOException {
            zipFile.close();
        }
    }

    /**
     * Not really a stream but provides an ArchiveOutputStream
     * compatible interface over SevenZOutputFile.
     */
    public static class SevenZArchiveOutputStream extends ArchiveOutputStream {

        private final SevenZOutputFile zipFile;

        public SevenZArchiveOutputStream(File file) throws IOException {
            zipFile = new SevenZOutputFile(file);
        }

        public void close() throws IOException {
            zipFile.close();
        }

        public void putArchiveEntry(ArchiveEntry entry) throws IOException {
            zipFile.putArchiveEntry(entry);
        }

        public void closeArchiveEntry() throws IOException {
            zipFile.closeArchiveEntry();
        }

        public void finish() throws IOException {
            zipFile.finish();
        }

        public ArchiveEntry createArchiveEntry(File inputFile, String entryName) 
            throws IOException {
            return zipFile.createArchiveEntry(inputFile, entryName);
        }

        public void write(byte[] b,int  off, int len) throws IOException {
            zipFile.write(b, off, len);
        }
                
        public void setContentCompression(SevenZMethod method) {
            zipFile.setContentCompression(method);
        }

    }

}