[go: nahoru, domu]
1package com.android.server.wifi.hotspot2.omadm;
2
3import org.xml.sax.Attributes;
4import org.xml.sax.InputSource;
5import org.xml.sax.SAXException;
6import org.xml.sax.helpers.DefaultHandler;
7
8import java.io.IOException;
9import java.io.StringReader;
10
11import javax.xml.parsers.ParserConfigurationException;
12import javax.xml.parsers.SAXParser;
13import javax.xml.parsers.SAXParserFactory;
14
15/**
16 * Parses an OMA-DM XML tree.
17 * OMA-DM = Open Mobile Association Device Management
18 */
19public class OMAParser extends DefaultHandler {
20    private XMLNode mRoot;
21    private XMLNode mCurrent;
22
23    public OMAParser() {
24        mRoot = null;
25        mCurrent = null;
26    }
27
28    public MOTree parse(String text, String urn) throws IOException, SAXException {
29        try {
30            SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
31            parser.parse(new InputSource(new StringReader(text)), this);
32            return new MOTree(mRoot, urn);
33        } catch (ParserConfigurationException pce) {
34            throw new SAXException(pce);
35        }
36    }
37
38    public XMLNode getRoot() {
39        return mRoot;
40    }
41
42    @Override
43    public void startElement(String uri, String localName, String qName, Attributes attributes)
44            throws SAXException {
45        XMLNode parent = mCurrent;
46
47        mCurrent = new XMLNode(mCurrent, qName, attributes);
48
49        if (mRoot == null)
50            mRoot = mCurrent;
51        else
52            parent.addChild(mCurrent);
53    }
54
55    @Override
56    public void endElement(String uri, String localName, String qName) throws SAXException {
57        if (!qName.equals(mCurrent.getTag()))
58            throw new SAXException("End tag '" + qName + "' doesn't match current node: " +
59                    mCurrent);
60
61        try {
62            mCurrent.close();
63        } catch (IOException ioe) {
64            throw new SAXException("Failed to close element", ioe);
65        }
66
67        mCurrent = mCurrent.getParent();
68    }
69
70    @Override
71    public void characters(char[] ch, int start, int length) throws SAXException {
72        mCurrent.addText(ch, start, length);
73    }
74}
75