    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.tiff;
    018
    019import java.util.ArrayList;
    020import java.util.Collections;
    021import java.util.List;
    022
    023import org.apache.commons.imaging.ImagingException;
    024import org.apache.commons.imaging.formats.tiff.taginfos.TagInfo;
    025import org.apache.commons.imaging.internal.Debug;
    026
    027public class TiffContents {
    028
    029    public final TiffHeader header;
    030    public final List<TiffDirectory> directories;
    031    public final List<TiffField> tiffFields;
    032
    033    public TiffContents(final TiffHeader tiffHeader, final List<TiffDirectory> directories, final List<TiffField> tiffFields) {
    034        this.header = tiffHeader;
    035        this.directories = Collections.unmodifiableList(directories);
    036        this.tiffFields = Collections.unmodifiableList(tiffFields);
    037    }
    038
    039    public void dissect() throws ImagingException {
    040        final List<AbstractTiffElement> elements = getElements();
    041
    042        elements.sort(AbstractTiffElement.COMPARATOR);
    043
    044        long lastEnd = 0;
    045        for (final AbstractTiffElement element : elements) {
    046            if (element.offset > lastEnd) {
    047                Debug.debug("\t" + "gap: " + (element.offset - lastEnd));
    048            }
    049            if (element.offset < lastEnd) {
    050                Debug.debug("\t" + "overlap");
    051            }
    052
    053            Debug.debug("element, start: " + element.offset + ", length: " + element.length + ", end: " + (element.offset + element.length) + ": "
    054                    + element.getElementDescription());
    055            final String verbosity = element.getElementDescription();
    056            if (null != verbosity) {
    057                Debug.debug(verbosity);
    058            }
    059
    060            lastEnd = element.offset + element.length;
    061        }
    062        Debug.debug("end: " + lastEnd);
    063        Debug.debug();
    064    }
    065
    066    public TiffField findField(final TagInfo tag) throws ImagingException {
    067        for (final TiffDirectory directory : directories) {
    068            final TiffField field = directory.findField(tag);
    069            if (null != field) {
    070                return field;
    071            }
    072        }
    073
    074        return null;
    075    }
    076
    077    public List<AbstractTiffElement> getElements() throws ImagingException {
    078        final List<AbstractTiffElement> result = new ArrayList<>();
    079
    080        result.add(header);
    081
    082        for (final TiffDirectory directory : directories) {
    083            result.add(directory);
    084
    085            for (final TiffField field : directory) {
    086                final AbstractTiffElement oversizeValue = field.getOversizeValueElement();
    087                if (null != oversizeValue) {
    088                    result.add(oversizeValue);
    089                }
    090            }
    091
    092            if (directory.hasTiffImageData()) {
    093                result.addAll(directory.getTiffRawImageDataElements());
    094            }
    095            if (directory.hasJpegImageData()) {
    096                result.add(directory.getJpegRawImageDataElement());
    097            }
    098        }
    099
    100        return result;
    101    }
    102
    103}