ExpatWrapper.h revision 9066cfe9886ac131c34d59ed0e2d287b0e3c0087
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#ifndef _XML_H_
17#define _XML_H_
18
19#include <expat.h>
20#include <ustring.h>
21#include <Drm2CommonTypes.h>
22
23using namespace ustl;
24
25class ExpatWrapper {
26public:
27    /**
28     * Constructor for ExpatWrapper.
29     */
30    ExpatWrapper();
31
32    /**
33     * Destructor for ExpatWrapper.
34     */
35    virtual ~ExpatWrapper();
36
37    /**
38     * decode call expat to parse the xml.
39     * @param buf The buffer to be parsed.
40     * @param len The length of the buffer.
41     * @param isFinal The flag to indicate whether the buffer
42     *                is a fragment or whole xml.
43     */
44    int decode(const char* buf, int len, int isFinal);
45
46    /**
47     * virtual funtion to deal with the start element in expat, need implement by child class.
48     */
49    virtual void startElement(const XML_Char *name, const XML_Char **atts);
50
51    /**
52     * virtual funtion to deal with the end element in expat, need implement by child class.
53     */
54    virtual void endElement(const XML_Char *name);
55
56    /**
57     * virtual funtion to deal with the data handler in expat, need implement by child class.
58     */
59    virtual void dataHandler(const XML_Char *s, int len);
60
61PRIVATE:
62    /**
63     * Callback for Expat startElement.
64     */
65    static void startElementCallback(void *userData, const XML_Char *name, const XML_Char **atts);
66
67    /**
68     * Callback for Expat endElement.
69     */
70    static void endElementCallback(void *userData, const XML_Char *name);
71
72    /**
73     * Callback for Expat dataHandler.
74     */
75    static void dataHandlerCallback(void *userData, const XML_Char *s, int len);
76
77PRIVATE:
78    XML_Parser mParser; /**< The expat parser object. */
79};
80
81#endif
82