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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.imaging.formats.tiff;
18  
19  import java.util.Comparator;
20  
21  public abstract class TiffElement {
22      public final long offset;
23      public final int length;
24      public static final Comparator<TiffElement> COMPARATOR = Comparator.comparingLong(e -> e.offset);
25  
26      public TiffElement(final long offset, final int length) {
27          this.offset = offset;
28          this.length = length;
29      }
30  
31      public abstract String getElementDescription();
32  
33      public abstract static class DataElement extends TiffElement {
34          private final byte[] data;
35  
36          public DataElement(final long offset, final int length, final byte[] data) {
37              super(offset, length);
38  
39              this.data = data;
40          }
41  
42          public byte[] getData() {
43              return data.clone();
44          }
45  
46          public int getDataLength() {
47              return data.length;
48          }
49      }
50  
51      public static final class Stub extends TiffElement {
52          public Stub(final long offset, final int length) {
53              super(offset, length);
54          }
55  
56          @Override
57          public String getElementDescription() {
58              return "Element, offset: " + offset + ", length: " + length
59                      + ", last: " + (offset + length);
60          }
61  
62      }
63  }