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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.util.List;

/**
 * Constant pool entry for a signature.
 */
public class CPSignature extends ConstantPoolEntry implements Comparable {

    private final CPUTF8 signatureForm;
    private final List classes;
    private final String signature;
    private final boolean formStartsWithBracket;

    public CPSignature(final String signature, final CPUTF8 signatureForm, final List classes) {
        this.signature = signature;
        this.signatureForm = signatureForm;
        this.classes = classes;
        formStartsWithBracket = signatureForm.toString().startsWith("(");
    }

    @Override
    public int compareTo(final Object arg0) {
        if (signature.equals(((CPSignature) arg0).signature)) {
            return 0;
        }
        if (formStartsWithBracket && !((CPSignature) arg0).formStartsWithBracket) {
            return 1;
        }
        if (((CPSignature) arg0).formStartsWithBracket && !formStartsWithBracket) {
            return -1;
        }
        if (classes.size() - ((CPSignature) arg0).classes.size() != 0) {
            return classes.size() - ((CPSignature) arg0).classes.size();
        }
        if (classes.size() > 0) {
            for (int i = classes.size() - 1; i >= 0; i--) {
                final CPClass cpClass = classes.get(i);
                final CPClass compareClass = ((CPSignature) arg0).classes.get(i);
                final int classComp = cpClass.compareTo(compareClass);
                if (classComp != 0) {
                    return classComp;
                }
            }
        }
        return signature.compareTo(((CPSignature) arg0).signature);
    }

    public List getClasses() {
        return classes;
    }

    public int getIndexInCpUtf8() {
        return signatureForm.getIndex();
    }

    public CPUTF8 getSignatureForm() {
        return signatureForm;
    }

    public String getUnderlyingString() {
        return signature;
    }

    @Override
    public String toString() {
        return signature;
    }
}