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 */ 017package org.apache.commons.imaging.formats.png; 018 019import java.util.ArrayList; 020import java.util.List; 021import java.util.Objects; 022 023import org.apache.commons.imaging.common.ImageMetadata; 024import org.apache.commons.imaging.formats.tiff.TiffImageMetadata; 025import org.apache.commons.imaging.internal.Debug; 026 027/** 028 * @since 1.0-alpha6 029 */ 030public class PngImageMetadata implements ImageMetadata { 031 032 private static final String NEWLINE = System.lineSeparator(); 033 034 private final ImageMetadata textualInformation; 035 private final TiffImageMetadata exif; 036 037 public PngImageMetadata(final ImageMetadata textualInformation) { 038 this(textualInformation, null); 039 } 040 041 public PngImageMetadata(final ImageMetadata textualInformation, final TiffImageMetadata exif) { 042 this.textualInformation = Objects.requireNonNull(textualInformation); 043 this.exif = exif; 044 } 045 046 public void dump() { 047 Debug.debug(this.toString()); 048 } 049 050 public TiffImageMetadata getExif() { 051 return exif; 052 } 053 054 @Override 055 public List<? extends ImageMetadataItem> getItems() { 056 if (exif == null) { 057 return textualInformation.getItems(); 058 } 059 060 final ArrayList<ImageMetadataItem> result = new ArrayList<>(textualInformation.getItems()); 061 result.addAll(exif.getItems()); 062 return result; 063 } 064 065 public ImageMetadata getTextualInformation() { 066 return textualInformation; 067 } 068 069 @Override 070 public String toString() { 071 return toString(null); 072 } 073 074 @Override 075 public String toString(String prefix) { 076 if (prefix == null) { 077 prefix = ""; 078 } 079 080 final StringBuilder result = new StringBuilder(); 081 082 result.append(prefix); 083 result.append("Textual information:"); 084 result.append(NEWLINE); 085 result.append(textualInformation.toString("\t")); 086 087 if (exif != null) { 088 result.append(NEWLINE); 089 result.append(prefix); 090 result.append("Exif metadata:"); 091 result.append(NEWLINE); 092 result.append(exif.toString("\t")); 093 } 094 095 return result.toString(); 096 } 097}