org.apache.commons.imaging.formats.jpeg.xmp.JpegXmpParser Maven / Gradle / Ivy
/*
* 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.commons.imaging.formats.jpeg.xmp;
import java.io.UnsupportedEncodingException;
import java.nio.ByteOrder;
import org.apache.commons.imaging.ImageReadException;
import org.apache.commons.imaging.common.BinaryFileParser;
import org.apache.commons.imaging.common.BinaryFunctions;
import org.apache.commons.imaging.formats.jpeg.JpegConstants;
public class JpegXmpParser extends BinaryFileParser {
public JpegXmpParser() {
setByteOrder(ByteOrder.BIG_ENDIAN);
}
public boolean isXmpJpegSegment(final byte[] segmentData) {
return BinaryFunctions.startsWith(segmentData, JpegConstants.XMP_IDENTIFIER);
}
public String parseXmpJpegSegment(final byte[] segmentData)
throws ImageReadException {
if (!isXmpJpegSegment(segmentData)) {
throw new ImageReadException("Invalid JPEG XMP Segment.");
}
final int index = JpegConstants.XMP_IDENTIFIER.size();
try {
// segment data is UTF-8 encoded xml.
return new String(segmentData, index, segmentData.length - index, "utf-8");
} catch (final UnsupportedEncodingException e) {
throw new ImageReadException("Invalid JPEG XMP Segment.", e);
}
}
}