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.ByteOrder; 021import java.nio.charset.StandardCharsets; 022 023import org.apache.commons.imaging.ImagingException; 024import org.apache.commons.imaging.common.BinaryFileParser; 025import org.apache.commons.imaging.common.BinaryFunctions; 026import org.apache.commons.imaging.formats.jpeg.JpegConstants; 027 028public class JpegXmpParser extends BinaryFileParser { 029 030 public JpegXmpParser() { 031 super(ByteOrder.BIG_ENDIAN); 032 } 033 034 public boolean isXmpJpegSegment(final byte[] segmentData) { 035 return BinaryFunctions.startsWith(segmentData, JpegConstants.XMP_IDENTIFIER); 036 } 037 038 public String parseXmpJpegSegment(final byte[] segmentData) throws ImagingException { 039 if (!isXmpJpegSegment(segmentData)) { 040 throw new ImagingException("Invalid JPEG XMP Segment."); 041 } 042 final int index = JpegConstants.XMP_IDENTIFIER.size(); 043 044 // segment data is UTF-8 encoded xml. 045 return new String(segmentData, index, segmentData.length - index, StandardCharsets.UTF_8); 046 } 047 048}