001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.imaging.formats.tiff;
018
019import java.util.Comparator;
020
021public abstract class TiffElement {
022    public final long offset;
023    public final int length;
024    public static final Comparator<TiffElement> COMPARATOR = Comparator.comparingLong(e -> e.offset);
025
026    public TiffElement(final long offset, final int length) {
027        this.offset = offset;
028        this.length = length;
029    }
030
031    public abstract String getElementDescription();
032
033    public abstract static class DataElement extends TiffElement {
034        private final byte[] data;
035
036        public DataElement(final long offset, final int length, final byte[] data) {
037            super(offset, length);
038
039            this.data = data;
040        }
041
042        public byte[] getData() {
043            return data.clone();
044        }
045
046        public int getDataLength() {
047            return data.length;
048        }
049    }
050
051    public static final class Stub extends TiffElement {
052        public Stub(final long offset, final int length) {
053            super(offset, length);
054        }
055
056        @Override
057        public String getElementDescription() {
058            return "Element, offset: " + offset + ", length: " + length
059                    + ", last: " + (offset + length);
060        }
061
062    }
063}