    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.ImageReadException;
    024import org.apache.commons.imaging.formats.tiff.taginfos.TagInfo;
    025import org.apache.commons.imaging.internal.Debug;
    026
    027public class TiffContents {
    028    public final TiffHeader header;
    029    public final List<TiffDirectory> directories;
    030    public final List<TiffField> tiffFields;
    031
    032    public TiffContents(final TiffHeader tiffHeader, final List<TiffDirectory> directories, final List<TiffField> tiffFields) {
    033        this.header = tiffHeader;
    034        this.directories = Collections.unmodifiableList(directories);
    035        this.tiffFields = Collections.unmodifiableList(tiffFields);
    036    }
    037
    038    public List<TiffElement> getElements() throws ImageReadException {
    039        final List<TiffElement> result = new ArrayList<>();
    040
    041        result.add(header);
    042
    043        for (final TiffDirectory directory : directories) {
    044            result.add(directory);
    045
    046            final List<TiffField> fields = directory.entries;
    047            for (final TiffField field : fields) {
    048                final TiffElement oversizeValue = field.getOversizeValueElement();
    049                if (null != oversizeValue) {
    050                    result.add(oversizeValue);
    051                }
    052            }
    053
    054            if (directory.hasTiffImageData()) {
    055                result.addAll(directory.getTiffRawImageDataElements());
    056            }
    057            if (directory.hasJpegImageData()) {
    058                result.add(directory.getJpegRawImageDataElement());
    059            }
    060        }
    061
    062        return result;
    063    }
    064
    065    public TiffField findField(final TagInfo tag) throws ImageReadException {
    066        for (final TiffDirectory directory : directories) {
    067            final TiffField field = directory.findField(tag);
    068            if (null != field) {
    069                return field;
    070            }
    071        }
    072
    073        return null;
    074    }
    075
    076    public void dissect() throws ImageReadException {
    077        final List<TiffElement> elements = getElements();
    078
    079        Collections.sort(elements, TiffElement.COMPARATOR);
    080
    081        long lastEnd = 0;
    082        for (final TiffElement element : elements) {
    083            if (element.offset > lastEnd) {
    084                Debug.debug("\t" + "gap: " + (element.offset - lastEnd));
    085            }
    086            if (element.offset < lastEnd) {
    087                Debug.debug("\t" + "overlap");
    088            }
    089
    090            Debug.debug("element, start: " + element.offset + ", length: "
    091                    + element.length + ", end: "
    092                    + (element.offset + element.length) + ": "
    093                    + element.getElementDescription());
    094            final String verbosity = element.getElementDescription();
    095            if (null != verbosity) {
    096                Debug.debug(verbosity);
    097            }
    098
    099            lastEnd = element.offset + element.length;
    100        }
    101        Debug.debug("end: " + lastEnd);
    102        Debug.debug();
    103    }
    104
    105}