1/*
2 * Copyright (C) 2007 Esmertec AG.
3 * Copyright (C) 2007 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18package com.android.mms.dom.smil.parser;
19
20import java.io.IOException;
21import java.io.InputStream;
22
23import org.w3c.dom.smil.SMILDocument;
24import org.xml.sax.InputSource;
25import org.xml.sax.SAXException;
26import org.xml.sax.XMLReader;
27import org.xml.sax.helpers.XMLReaderFactory;
28
29import com.google.android.mms.MmsException;
30
31public class SmilXmlParser {
32    private XMLReader mXmlReader;
33    private SmilContentHandler mContentHandler;
34
35    public SmilXmlParser() throws MmsException {
36        //FIXME: Now we don't have the SAXParser wrapped inside,
37        //       use the Driver class temporarily.
38        System.setProperty("org.xml.sax.driver", "org.xmlpull.v1.sax2.Driver");
39
40        try {
41            mXmlReader = XMLReaderFactory.createXMLReader();
42            mContentHandler = new SmilContentHandler();
43            mXmlReader.setContentHandler(mContentHandler);
44        } catch (SAXException e) {
45            throw new MmsException(e);
46        }
47    }
48
49    public SMILDocument parse(InputStream in) throws IOException, SAXException {
50        mContentHandler.reset();
51
52        mXmlReader.parse(new InputSource(in));
53
54        SMILDocument doc = mContentHandler.getSmilDocument();
55        validateDocument(doc);
56
57        return doc;
58    }
59
60    private void validateDocument(SMILDocument doc) {
61        /*
62         * Calling getBody() will create "smil", "head", and "body" elements if they
63         * are not present. It will also initialize the SequentialTimeElementContainer
64         * member of SMILDocument, which could not be set on creation of the document.
65         * @see com.android.mms.dom.smil.SmilDocumentImpl#getBody()
66         */
67        doc.getBody();
68
69        /*
70         * Calling getLayout() will create "layout" element if it is not present.
71         * @see com.android.mms.dom.smil.SmilDocumentImpl#getLayout()
72         */
73        doc.getLayout();
74    }
75}
76