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.ImageReadException; 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 setByteOrder(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) 039 throws ImageReadException { 040 if (!isXmpJpegSegment(segmentData)) { 041 throw new ImageReadException("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}