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The file system driver family for ZIP and related archive file types. Add the JAR artifact of this module to the run time class path to make its file system drivers available for service location in the client API modules.

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/*
 * Copyright (C) 2005-2013 Schlichtherle IT Services.
 * All rights reserved. Use is subject to license terms.
 */
package de.schlichtherle.truezip.zip;

import de.schlichtherle.truezip.util.JSE7;
import edu.umd.cs.findbugs.annotations.CleanupObligation;
import edu.umd.cs.findbugs.annotations.CreatesObligation;
import edu.umd.cs.findbugs.annotations.DischargesObligation;
import java.io.IOException;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;
import javax.annotation.WillCloseWhenClosed;

/**
 * An inflater input stream which uses a custom {@link Inflater} and provides
 * access to it.
 *
 * @author  Christian Schlichtherle
 */
@CleanupObligation
final class ZipInflaterInputStream extends InflaterInputStream {

    private static final InflaterFactory factory = JSE7.AVAILABLE
                        ? new InflaterFactory()        // JDK 7 is OK
                        : new Jdk6InflaterFactory();   // JDK 6 needs fixing

    @CreatesObligation
    ZipInflaterInputStream(@WillCloseWhenClosed DummyByteInputStream in, int size) {
        super(in, factory.newInflater(), size);
    }

    Inflater getInflater() {
        return inf;
    }

    @Override
    @DischargesObligation
    public void close() throws IOException {
        super.close();
        inf.end();
    }

    /** A factory for {@link Inflater} objects. */
    private static class InflaterFactory {
        protected Inflater newInflater() {
            return new Inflater(true);
        }
    }

    /** A factory for {@link Jdk6Inflater} objects. */
    private static final class Jdk6InflaterFactory extends InflaterFactory {
        @Override
        protected Inflater newInflater() {
            return new Jdk6Inflater(true);
        }
    }
}