ant/src/main/org/apache/tools/zip/UnrecognizedExtraField.java

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
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 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
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 * This software consists of voluntary contributions made by many
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 */

package org.apache.tools.zip;

/**
 * Simple placeholder for all those extra fields we don't want to deal
 * with.
 *
 * <p>Assumes local file data and central directory entries are
 * identical - unless told the opposite.</p>
 *
 * @author <a href="stefan.bodewig@epost.de">Stefan Bodewig</a>
 * @version $Revision$
 */
public class UnrecognizedExtraField implements ZipExtraField {

    /**
     * The Header-ID.
     *
     * @since 1.1
     */
    private ZipShort headerId;

    public void setHeaderId(ZipShort headerId) {
        this.headerId = headerId;
    }

    public ZipShort getHeaderId() {return headerId;}

    /**
     * Extra field data in local file data - without
     * Header-ID or length specifier.
     *
     * @since 1.1
     */
    private byte[] localData;

    public void setLocalFileDataData(byte[] data) {
        localData = data;
    }

    public ZipShort getLocalFileDataLength() {
        return new ZipShort(localData.length);
    }

    public byte[] getLocalFileDataData() {return localData;}

    /**
     * Extra field data in central directory - without
     * Header-ID or length specifier.
     *
     * @since 1.1
     */
    private byte[] centralData;

    public void setCentralDirectoryData(byte[] data) {
        centralData = data;
    }

    public ZipShort getCentralDirectoryLength() {
        if (centralData != null) {
            return new ZipShort(centralData.length);
        }
        return getLocalFileDataLength();
    }

    public byte[] getCentralDirectoryData() {
        if (centralData != null) {
            return centralData;
        }
        return getLocalFileDataData();
    }

    public void parseFromLocalFileData(byte[] data, int offset, int length) {
        byte[] tmp = new byte[length];
        System.arraycopy(data, offset, tmp, 0, length);
        setLocalFileDataData(tmp);
    }
}