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Apache Commons Compress defines an API for working with compression and archive formats. These include bzip2, gzip, pack200, LZMA, XZ, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4, Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, 7z, arj.
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/*
 *  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.commons.compress.harmony.pack200;

import java.io.IOException;
import java.io.OutputStream;
import java.util.jar.JarFile;
import java.util.jar.JarInputStream;

import org.apache.commons.compress.java.util.jar.Pack200.Packer;
import org.apache.commons.compress.utils.ParsingUtils;

/**
 * This class provides the binding between the standard Pack200 interface and the internal interface for (un)packing. As this uses generics for the SortedMap,
 * this class must be compiled and run on a Java 1.5 system. However, Java 1.5 is not necessary to use the internal libraries for unpacking.
 */
public class Pack200PackerAdapter extends Pack200Adapter implements Packer {

    private final PackingOptions options = new PackingOptions();

    @Override
    protected void firePropertyChange(final String propertyName, final Object oldValue, final Object newValue) throws IOException {
        super.firePropertyChange(propertyName, oldValue, newValue);
        if (newValue != null && !newValue.equals(oldValue)) {
            if (propertyName.startsWith(CLASS_ATTRIBUTE_PFX)) {
                final String attributeName = propertyName.substring(CLASS_ATTRIBUTE_PFX.length());
                options.addClassAttributeAction(attributeName, (String) newValue);
            } else if (propertyName.startsWith(CODE_ATTRIBUTE_PFX)) {
                final String attributeName = propertyName.substring(CODE_ATTRIBUTE_PFX.length());
                options.addCodeAttributeAction(attributeName, (String) newValue);
            } else if (propertyName.equals(DEFLATE_HINT)) {
                options.setDeflateHint((String) newValue);
            } else if (propertyName.equals(EFFORT)) {
                options.setEffort(ParsingUtils.parseIntValue((String) newValue));
            } else if (propertyName.startsWith(FIELD_ATTRIBUTE_PFX)) {
                final String attributeName = propertyName.substring(FIELD_ATTRIBUTE_PFX.length());
                options.addFieldAttributeAction(attributeName, (String) newValue);
            } else if (propertyName.equals(KEEP_FILE_ORDER)) {
                options.setKeepFileOrder(Boolean.parseBoolean((String) newValue));
            } else if (propertyName.startsWith(METHOD_ATTRIBUTE_PFX)) {
                final String attributeName = propertyName.substring(METHOD_ATTRIBUTE_PFX.length());
                options.addMethodAttributeAction(attributeName, (String) newValue);
            } else if (propertyName.equals(MODIFICATION_TIME)) {
                options.setModificationTime((String) newValue);
            } else if (propertyName.startsWith(PASS_FILE_PFX)) {
                if (oldValue != null && !oldValue.equals("")) {
                    options.removePassFile((String) oldValue);
                }
                options.addPassFile((String) newValue);
            } else if (propertyName.equals(SEGMENT_LIMIT)) {
                options.setSegmentLimit(ParsingUtils.parseLongValue((String) newValue));
            } else if (propertyName.equals(UNKNOWN_ATTRIBUTE)) {
                options.setUnknownAttributeAction((String) newValue);
            }
        }
    }

    @Override
    public void pack(final JarFile file, final OutputStream out) throws IOException {
        if (file == null || out == null) {
            throw new IllegalArgumentException("Must specify both input and output streams");
        }
        completed(0);
        try {
            new org.apache.commons.compress.harmony.pack200.Archive(file, out, options).pack();
        } catch (final Pack200Exception e) {
            throw new IOException("Failed to pack Jar:" + e);
        }
        completed(1);
    }

    @Override
    public void pack(final JarInputStream in, final OutputStream out) throws IOException {
        if (in == null || out == null) {
            throw new IllegalArgumentException("Must specify both input and output streams");
        }
        completed(0);
        final PackingOptions options = new PackingOptions();

        try {
            new org.apache.commons.compress.harmony.pack200.Archive(in, out, options).pack();
        } catch (final Pack200Exception e) {
            throw new IOException("Failed to pack Jar:" + e);
        }
        completed(1);
        in.close();
    }

}