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
17package org.apache.harmony.xml.parsers;
18
19import java.util.HashMap;
20import java.util.Map;
21import javax.xml.parsers.ParserConfigurationException;
22import javax.xml.parsers.SAXParser;
23import javax.xml.parsers.SAXParserFactory;
24import org.xml.sax.SAXNotRecognizedException;
25
26/**
27 * Provides a straightforward SAXParserFactory implementation based on
28 * Expat. The class is used internally only, thus only notable members
29 * that are not already in the abstract superclass are documented.
30 */
31public class SAXParserFactoryImpl extends SAXParserFactory {
32
33    private static final String NAMESPACES
34            = "http://xml.org/sax/features/namespaces";
35
36    private static final String VALIDATION
37            = "http://xml.org/sax/features/validation";
38
39    private Map<String, Boolean> features = new HashMap<String, Boolean>();
40
41    @Override
42    public boolean getFeature(String name) throws SAXNotRecognizedException {
43        if (name == null) {
44            throw new NullPointerException("name == null");
45        }
46
47        if (!name.startsWith("http://xml.org/sax/features/")) {
48            throw new SAXNotRecognizedException(name);
49        }
50
51        return Boolean.TRUE.equals(features.get(name));
52    }
53
54    @Override
55    public boolean isNamespaceAware() {
56        try {
57            return getFeature(NAMESPACES);
58        } catch (SAXNotRecognizedException ex) {
59            throw new AssertionError(ex);
60        }
61    }
62
63    @Override
64    public boolean isValidating() {
65        try {
66            return getFeature(VALIDATION);
67        } catch (SAXNotRecognizedException ex) {
68            throw new AssertionError(ex);
69        }
70    }
71
72    @Override
73    public SAXParser newSAXParser() throws ParserConfigurationException {
74        if (isValidating()) {
75            throw new ParserConfigurationException(
76                    "No validating SAXParser implementation available");
77        }
78
79        try {
80            return new SAXParserImpl(features);
81        } catch (Exception ex) {
82            throw new ParserConfigurationException(ex.toString());
83        }
84    }
85
86    @Override
87    public void setFeature(String name, boolean value) throws SAXNotRecognizedException {
88        if (name == null) {
89            throw new NullPointerException("name == null");
90        }
91
92        if (!name.startsWith("http://xml.org/sax/features/")) {
93            throw new SAXNotRecognizedException(name);
94        }
95
96        if (value) {
97            features.put(name, Boolean.TRUE);
98        } else {
99            // This is needed to disable features that are enabled by default.
100            features.put(name, Boolean.FALSE);
101        }
102    }
103
104    @Override
105    public void setNamespaceAware(boolean value) {
106        try {
107            setFeature(NAMESPACES, value);
108        } catch (SAXNotRecognizedException ex) {
109            throw new AssertionError(ex);
110        }
111    }
112
113    @Override
114    public void setValidating(boolean value) {
115        try {
116            setFeature(VALIDATION, value);
117        } catch (SAXNotRecognizedException ex) {
118            throw new AssertionError(ex);
119        }
120    }
121}
122