    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}