001/**
002 *
003 * Copyright © 2014 Florian Schmaus
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * 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.jivesoftware.smackx.rsm.packet;
018
019import org.jivesoftware.smack.packet.ExtensionElement;
020import org.jivesoftware.smack.packet.Stanza;
021import org.jivesoftware.smack.util.XmlStringBuilder;
022
023public class RSMSet implements ExtensionElement {
024
025    public static final String ELEMENT = "set";
026    public static final String NAMESPACE = "http://jabber.org/protocol/rsm";
027
028    private final String after;
029    private final String before;
030    private final int count;
031    private final int index;
032    private final String last;
033    private final int max;
034    private final String firstString;
035    private final int firstIndex;
036
037    public enum PageDirection {
038        before,
039        after
040    }
041
042    public RSMSet(int max) {
043        this(max, -1);
044    }
045
046    public RSMSet(int max, int index) {
047        this(null, null, -1, index, null, max, null, -1);
048    }
049
050    public RSMSet(String item, PageDirection pageDirection) {
051        this(-1, item, pageDirection);
052    }
053
054    public RSMSet(int max, String item, PageDirection pageDirection) {
055        switch (pageDirection) {
056        case before:
057            this.before = item;
058            this.after = null;
059            break;
060        case after:
061            this.before = null;
062            this.after = item;
063            break;
064        default:
065            throw new AssertionError();
066        }
067        this.count = -1;
068        this.index = -1;
069        this.last = null;
070        this.max = max;
071        this.firstString = null;
072        this.firstIndex = -1;
073    }
074
075    public RSMSet(String after, String before, int count, int index,
076                    String last, int max, String firstString, int firstIndex) {
077        this.after = after;
078        this.before = before;
079        this.count = count;
080        this.index = index;
081        this.last = last;
082        this.max = max;
083        this.firstString = firstString;
084        this.firstIndex = firstIndex;
085    }
086
087    public String getAfter() {
088        return after;
089    }
090
091    public String getBefore() {
092        return before;
093    }
094
095    public int getCount() {
096        return count;
097    }
098
099    public int getIndex() {
100        return index;
101    }
102
103    public String getLast() {
104        return last;
105    }
106
107    public int getMax() {
108        return max;
109    }
110
111    public String getFirst() {
112        return firstString;
113    }
114
115    public int getFirstIndex() {
116        return firstIndex;
117    }
118
119    @Override
120    public String getElementName() {
121        return ELEMENT;
122    }
123
124    @Override
125    public String getNamespace() {
126        return NAMESPACE;
127    }
128
129    @Override
130    public XmlStringBuilder toXML(String enclosingNamespace) {
131        XmlStringBuilder xml = new XmlStringBuilder(this);
132        xml.rightAngleBracket();
133        xml.optElement("after", after);
134        xml.optElement("before", before);
135        xml.optIntElement("count", count);
136        if (firstString != null) {
137            xml.halfOpenElement("first");
138            xml.optIntAttribute("index", firstIndex);
139            xml.rightAngleBracket();
140            xml.append(firstString);
141            xml.closeElement("first");
142        }
143        xml.optIntElement("index", index);
144        xml.optElement("last", last);
145        xml.optIntElement("max", max);
146        xml.closeElement(this);
147        return xml;
148    }
149
150    public static RSMSet from(Stanza packet) {
151        return (RSMSet) packet.getExtension(ELEMENT, NAMESPACE);
152    }
153
154    public static RSMSet newAfter(String after) {
155        return new RSMSet(after, PageDirection.after);
156    }
157
158    public static RSMSet newBefore(String before) {
159        return new RSMSet(before, PageDirection.before);
160    }
161}