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
18 package org.apache.commons.imaging.formats.jpeg.xmp;
19
20 import java.nio.charset.StandardCharsets;
21
22 import org.apache.commons.imaging.ImagingException;
23 import org.apache.commons.imaging.common.BinaryFileParser;
24 import org.apache.commons.imaging.formats.jpeg.JpegConstants;
25
26 public class JpegXmpParser extends BinaryFileParser {
27
28 /**
29 * Constructs a new instance with the default, big-endian, byte order.
30 */
31 public JpegXmpParser() {
32 // empty
33 }
34
35 public boolean isXmpJpegSegment(final byte[] segmentData) {
36 return JpegConstants.XMP_IDENTIFIER.isStartOf(segmentData);
37 }
38
39 public String parseXmpJpegSegment(final byte[] segmentData) throws ImagingException {
40 if (!isXmpJpegSegment(segmentData)) {
41 throw new ImagingException("Invalid JPEG XMP Segment.");
42 }
43 final int index = JpegConstants.XMP_IDENTIFIER.size();
44
45 // segment data is UTF-8 encoded xml.
46 return new String(segmentData, index, segmentData.length - index, StandardCharsets.UTF_8);
47 }
48
49 }