    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 */
    017
    018package org.apache.commons.imaging.formats.jpeg.xmp;
    019
    020import java.nio.charset.StandardCharsets;
    021
    022import org.apache.commons.imaging.ImagingException;
    023import org.apache.commons.imaging.common.BinaryFileParser;
    024import org.apache.commons.imaging.formats.jpeg.JpegConstants;
    025
    026public class JpegXmpParser extends BinaryFileParser {
    027
    028    /**
    029     * Constructs a new instance with the default, big-endian, byte order.
    030     */
    031    public JpegXmpParser() {
    032        // empty
    033    }
    034
    035    public boolean isXmpJpegSegment(final byte[] segmentData) {
    036        return JpegConstants.XMP_IDENTIFIER.isStartOf(segmentData);
    037    }
    038
    039    public String parseXmpJpegSegment(final byte[] segmentData) throws ImagingException {
    040        if (!isXmpJpegSegment(segmentData)) {
    041            throw new ImagingException("Invalid JPEG XMP Segment.");
    042        }
    043        final int index = JpegConstants.XMP_IDENTIFIER.size();
    044
    045        // segment data is UTF-8 encoded xml.
    046        return new String(segmentData, index, segmentData.length - index, StandardCharsets.UTF_8);
    047    }
    048
    049}