001/**
002 *
003 * Copyright 2014 Anno van Vliet
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.xdatalayout.provider;
018
019import java.io.IOException;
020import java.util.List;
021
022import org.jivesoftware.smack.xml.XmlPullParser;
023import org.jivesoftware.smack.xml.XmlPullParserException;
024
025import org.jivesoftware.smackx.xdatalayout.packet.DataLayout;
026import org.jivesoftware.smackx.xdatalayout.packet.DataLayout.DataFormLayoutElement;
027import org.jivesoftware.smackx.xdatalayout.packet.DataLayout.Fieldref;
028import org.jivesoftware.smackx.xdatalayout.packet.DataLayout.Reportedref;
029import org.jivesoftware.smackx.xdatalayout.packet.DataLayout.Section;
030import org.jivesoftware.smackx.xdatalayout.packet.DataLayout.Text;
031
032/**
033 * Extension Provider for Page layout of forms.
034 *
035 * @author Anno van Vliet
036 *
037 */
038public class DataLayoutProvider {
039
040    public static DataLayout parse(XmlPullParser parser) throws XmlPullParserException, IOException {
041        DataLayout dataLayout = new DataLayout(parser.getAttributeValue("", "label"));
042        parseLayout(dataLayout.getPageLayout(), parser);
043        return dataLayout;
044    }
045
046    private static Section parseSection(XmlPullParser parser) throws XmlPullParserException, IOException {
047        Section layout = new Section(parser.getAttributeValue("", "label"));
048        parseLayout(layout.getSectionLayout(), parser);
049        return layout;
050    }
051
052    private static void parseLayout(List<DataFormLayoutElement> layout, XmlPullParser parser) throws XmlPullParserException, IOException {
053        final int initialDepth = parser.getDepth();
054        outerloop: while (true) {
055            XmlPullParser.Event eventType = parser.next();
056            switch (eventType) {
057            case START_ELEMENT:
058                switch (parser.getName()) {
059                case Text.ELEMENT:
060                    layout.add(new Text(parser.nextText()));
061                    break;
062                case Section.ELEMENT:
063                    layout.add(parseSection(parser));
064                    break;
065                case Fieldref.ELEMENT:
066                    layout.add(parseFieldref(parser));
067                    break;
068                case Reportedref.ELEMENT:
069                    layout.add(new Reportedref());
070                    break;
071                default:
072                    break;
073                }
074                break;
075            case END_ELEMENT:
076                if (parser.getDepth() == initialDepth) {
077                    break outerloop;
078                }
079                break;
080            default:
081                // Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
082                break;
083            }
084        }
085    }
086
087    private static Fieldref parseFieldref(XmlPullParser parser) throws XmlPullParserException, IOException {
088        final int initialDepth = parser.getDepth();
089        Fieldref fieldref = new Fieldref(parser.getAttributeValue("", "var"));
090        outerloop: while (true) {
091            XmlPullParser.Event eventType = parser.next();
092            if (eventType == XmlPullParser.Event.END_ELEMENT && parser.getDepth() == initialDepth) {
093                break outerloop;
094            }
095        }
096        return fieldref;
097    }
098
099}