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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.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>
*
*/
public class UnrecognizedExtraField
implements CentralDirectoryParsingZipExtraField {
/**
* The Header-ID.
*
* @since 1.1
*/
private ZipShort headerId;
/**
* Set the header id.
* @param headerId the header id to use
*/
public void setHeaderId(ZipShort headerId) {
this.headerId = headerId;
}
/**
* Get the header id.
* @return the header id
*/
public ZipShort getHeaderId() {
return headerId;
}
/**
* Extra field data in local file data - without
* Header-ID or length specifier.
*
* @since 1.1
*/
private byte[] localData;
/**
* Set the extra field data in the local file data -
* without Header-ID or length specifier.
* @param data the field data to use
*/
public void setLocalFileDataData(byte[] data) {
localData = ZipUtil.copy(data);
}
/**
* Get the length of the local data.
* @return the length of the local data
*/
public ZipShort getLocalFileDataLength() {
return new ZipShort(localData.length);
}
/**
* Get the local data.
* @return the local data
*/
public byte[] getLocalFileDataData() {
return ZipUtil.copy(localData);
}
/**
* Extra field data in central directory - without
* Header-ID or length specifier.
*
* @since 1.1
*/
private byte[] centralData;
/**
* Set the extra field data in central directory.
* @param data the data to use
*/
public void setCentralDirectoryData(byte[] data) {
centralData = ZipUtil.copy(data);
}
/**
* Get the central data length.
* If there is no central data, get the local file data length.
* @return the central data length
*/
public ZipShort getCentralDirectoryLength() {
if (centralData != null) {
return new ZipShort(centralData.length);
}
return getLocalFileDataLength();
}
/**
* Get the central data.
* @return the central data if present, else return the local file data
*/
public byte[] getCentralDirectoryData() {
if (centralData != null) {
return ZipUtil.copy(centralData);
}
return getLocalFileDataData();
}
/**
* @param data the array of bytes.
* @param offset the source location in the data array.
* @param length the number of bytes to use in the data array.
* @see ZipExtraField#parseFromLocalFileData(byte[], int, int)
*/
public void parseFromLocalFileData(byte[] data, int offset, int length) {
byte[] tmp = new byte[length];
System.arraycopy(data, offset, tmp, 0, length);
setLocalFileDataData(tmp);
}
/**
* @param data the array of bytes.
* @param offset the source location in the data array.
* @param length the number of bytes to use in the data array.
*/
public void parseFromCentralDirectoryData(byte[] data, int offset,
int length) {
byte[] tmp = new byte[length];
System.arraycopy(data, offset, tmp, 0, length);
setCentralDirectoryData(tmp);
if (localData == null) {
setLocalFileDataData(tmp);
}
}
}
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