001/* ***** BEGIN LICENSE BLOCK *****
002 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
003 *
004 * The contents of this file are subject to the Mozilla Public License Version
005 * 1.1 (the "License"); you may not use this file except in compliance with
006 * the License. You may obtain a copy of the License at
007 * http://www.mozilla.org/MPL/
008 *
009 * Software distributed under the License is distributed on an "AS IS" basis,
010 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
011 * for the specific language governing rights and limitations under the
012 * License.
013 *
014 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
015 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
016 *
017 * The Initial Developer of the Original Code is
018 * Agfa Healthcare.
019 * Portions created by the Initial Developer are Copyright (C) 2011
020 * the Initial Developer. All Rights Reserved.
021 *
022 * Contributor(s):
023 * See @authors listed below
024 *
025 * Alternatively, the contents of this file may be used under the terms of
026 * either the GNU General Public License Version 2 or later (the "GPL"), or
027 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
028 * in which case the provisions of the GPL or the LGPL are applicable instead
029 * of those above. If you wish to allow use of your version of this file only
030 * under the terms of either the GPL or the LGPL, and not to allow others to
031 * use your version of this file under the terms of the MPL, indicate your
032 * decision by deleting the provisions above and replace them with the notice
033 * and other provisions required by the GPL or the LGPL. If you do not delete
034 * the provisions above, a recipient may use your version of this file under
035 * the terms of any one of the MPL, the GPL or the LGPL.
036 *
037 * ***** END LICENSE BLOCK ***** */
038
039package org.dcm4che3.data;
040
041import java.io.Serializable;
042
043/**
044 * @author Gunter Zeilinger <gunterze@gmail.com>
045 */
046public class ItemPointer implements Serializable {
047
048    private static final long serialVersionUID = 5183950023496022964L;
049
050    public final int sequenceTag;
051    public final String privateCreator;
052    public final int itemIndex;
053
054    public ItemPointer(int sequenceTag) {
055        this(null, sequenceTag, 0);
056    }
057
058    public ItemPointer(int sequenceTag, int itemIndex) {
059        this(null, sequenceTag, itemIndex);
060    }
061
062    public ItemPointer(String privateCreator, int sequenceTag) {
063        this(privateCreator, sequenceTag, 0);
064    }
065
066    public ItemPointer(String privateCreator, int sequenceTag, int itemIndex) {
067        this.sequenceTag = sequenceTag;
068        this.privateCreator = privateCreator;
069        this.itemIndex = itemIndex;
070    }
071
072    @Override
073    public boolean equals(Object o) {
074        if (this == o) return true;
075        if (o == null || getClass() != o.getClass()) return false;
076
077        ItemPointer that = (ItemPointer) o;
078
079        if (itemIndex != that.itemIndex) return false;
080        if (sequenceTag != that.sequenceTag) return false;
081        if (privateCreator != null ? !privateCreator.equals(that.privateCreator) : that.privateCreator != null)
082            return false;
083
084        return true;
085    }
086
087    @Override
088    public int hashCode() {
089        int result = sequenceTag;
090        result = 31 * result + (privateCreator != null ? privateCreator.hashCode() : 0);
091        result = 31 * result + itemIndex;
092        return result;
093    }
094}