    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.jpeg.segments;
    018
    019import static org.apache.commons.imaging.common.BinaryFunctions.readAndVerifyBytes;
    020import static org.apache.commons.imaging.common.BinaryFunctions.readByte;
    021import static org.apache.commons.imaging.common.BinaryFunctions.readBytes;
    022
    023import java.io.ByteArrayInputStream;
    024import java.io.IOException;
    025import java.io.InputStream;
    026
    027import org.apache.commons.imaging.ImagingException;
    028import org.apache.commons.imaging.formats.jpeg.JpegConstants;
    029
    030public final class App2Segment extends AppnSegment implements Comparable<App2Segment> {
    031    private final byte[] iccBytes;
    032    public final int curMarker;
    033    public final int numMarkers;
    034
    035    public App2Segment(final int marker, final byte[] segmentData) throws ImagingException, IOException {
    036        this(marker, segmentData.length, new ByteArrayInputStream(segmentData));
    037    }
    038
    039    public App2Segment(final int marker, int markerLength, final InputStream is2) throws ImagingException, IOException {
    040        super(marker, markerLength, is2);
    041
    042        if (JpegConstants.ICC_PROFILE_LABEL.isStartOf(getSegmentData())) {
    043            final InputStream is = new ByteArrayInputStream(getSegmentData());
    044
    045            readAndVerifyBytes(is, JpegConstants.ICC_PROFILE_LABEL, "Not a Valid App2 Segment: missing ICC Profile label");
    046
    047            curMarker = readByte("curMarker", is, "Not a valid App2 Marker");
    048            numMarkers = readByte("numMarkers", is, "Not a valid App2 Marker");
    049
    050            markerLength -= JpegConstants.ICC_PROFILE_LABEL.size();
    051            markerLength -= 1 + 1;
    052
    053            iccBytes = readBytes("App2 Data", is, markerLength, "Invalid App2 Segment: insufficient data");
    054        } else {
    055            // debugByteArray("Unknown APP2 Segment Type", bytes);
    056            curMarker = -1;
    057            numMarkers = -1;
    058            iccBytes = null;
    059        }
    060    }
    061
    062    @Override
    063    public int compareTo(final App2Segment other) {
    064        return curMarker - other.curMarker;
    065    }
    066
    067    @Override
    068    public boolean equals(final Object obj) {
    069        if (obj instanceof App2Segment) {
    070            final App2Segment other = (App2Segment) obj;
    071            return curMarker == other.curMarker;
    072        }
    073        return false;
    074    }
    075
    076    /**
    077     * @return the iccBytes
    078     */
    079    public byte[] getIccBytes() {
    080        return iccBytes != null ? iccBytes.clone() : null;
    081    }
    082
    083    @Override
    084    public int hashCode() {
    085        return curMarker;
    086    }
    087}