    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 = (e1, e2) -> {
    025        if (e1.offset < e2.offset) {
    026            return -1;
    027        } else if (e1.offset > e2.offset) {
    028            return 1;
    029        } else {
    030            return 0;
    031        }
    032    };
    033
    034    public TiffElement(final long offset, final int length) {
    035        this.offset = offset;
    036        this.length = length;
    037    }
    038
    039    public abstract String getElementDescription();
    040
    041    public abstract static class DataElement extends TiffElement {
    042        private final byte[] data;
    043
    044        public DataElement(final long offset, final int length, final byte[] data) {
    045            super(offset, length);
    046
    047            this.data = data;
    048        }
    049
    050        public byte[] getData() {
    051            return data.clone();
    052        }
    053
    054        public int getDataLength() {
    055            return data.length;
    056        }
    057    }
    058
    059    public static final class Stub extends TiffElement {
    060        public Stub(final long offset, final int length) {
    061            super(offset, length);
    062        }
    063
    064        @Override
    065        public String getElementDescription() {
    066            return "Element, offset: " + offset + ", length: " + length
    067                    + ", last: " + (offset + length);
    068        }
    069
    070    }
    071}