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Viewing changes to org.aspectj/modules/weaver/src/org/aspectj/weaver/loadtime/definition/SimpleAOPParser.java

  • Committer: Bazaar Package Importer
  • Author(s): Damien Raude-Morvan
  • Date: 2011-03-15 23:54:31 UTC
  • mfrom: (1.2.5 upstream)
  • mto: This revision was merged to the branch mainline in revision 9.
  • Revision ID: james.westby@ubuntu.com-20110315235431-iq2gxbsx08kpwuiw
* New upstream release.
* Updated Standards-Version to 3.9.1 (no changes needed).
* Fix local Javadoc links:
  - d/patches/07_javadoc_links.diff: Use locally installed
   javadoc packages and hyperlink with them.
  - d/control: Add B-D on default-java-doc and libasm3-java-doc.
* d/control: Drop B-D on itself (our new bootstrap infrastructure doesn't need
  that anymore).
* Split packages into :
  - aspectj: only contains CLI tools.
  - libaspectj-java: JAR librairies for /usr/share/java.
  - libaspectj-java-doc: 4 API's Javadoc.
  - aspectj-doc: Programming Guides and SDK Documentation.

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org.aspectj/modules/weaver/src/org/aspectj/weaver/loadtime/definition/SimpleAOPParser.java
 
1
/*******************************************************************************
 
2
 * Copyright (c) 2011 Contributors.
 
3
 * All rights reserved.
 
4
 * This program and the accompanying materials are made available
 
5
 * under the terms of the Eclipse Public License v1.0
 
6
 * which accompanies this distribution and is available at
 
7
 * http://eclipse.org/legal/epl-v10.html
 
8
 *
 
9
 * Contributors:
 
10
 *   Abraham Nevado - Lucierna  initial implementation
 
11
 *      Just a slight variation of current DocumentParser.java from Alexandre Vasseur. 
 
12
 *******************************************************************************/
 
13
package org.aspectj.weaver.loadtime.definition;
 
14
 
 
15
import java.io.InputStream;
 
16
import java.io.InputStreamReader;
 
17
import java.net.URL;
 
18
import java.util.ArrayList;
 
19
import java.util.Map;
 
20
 
 
21
import org.aspectj.util.LangUtil;
 
22
 
 
23
/**
 
24
 * This class has been created to avoid deadlocks when instrumenting SAXParser.
 
25
 * So it is used as a wrapper for the ligthweigh XML parser LightXMLParser.
 
26
 * 
 
27
 * @author A. Nevado
 
28
 */
 
29
public class SimpleAOPParser {
 
30
 
 
31
        private final static String ASPECTJ_ELEMENT = "aspectj";
 
32
        private final static String WEAVER_ELEMENT = "weaver";
 
33
        private final static String DUMP_ELEMENT = "dump";
 
34
        private final static String DUMP_BEFOREANDAFTER_ATTRIBUTE = "beforeandafter";
 
35
        private final static String DUMP_PERCLASSLOADERDIR_ATTRIBUTE = "perclassloaderdumpdir";
 
36
        private final static String INCLUDE_ELEMENT = "include";
 
37
        private final static String EXCLUDE_ELEMENT = "exclude";
 
38
        private final static String OPTIONS_ATTRIBUTE = "options";
 
39
        private final static String ASPECTS_ELEMENT = "aspects";
 
40
        private final static String ASPECT_ELEMENT = "aspect";
 
41
        private final static String CONCRETE_ASPECT_ELEMENT = "concrete-aspect";
 
42
        private final static String NAME_ATTRIBUTE = "name";
 
43
        private final static String SCOPE_ATTRIBUTE = "scope";
 
44
        private final static String REQUIRES_ATTRIBUTE = "requires";
 
45
        private final static String EXTEND_ATTRIBUTE = "extends";
 
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        private final static String PRECEDENCE_ATTRIBUTE = "precedence";
 
47
        private final static String PERCLAUSE_ATTRIBUTE = "perclause";
 
48
        private final static String POINTCUT_ELEMENT = "pointcut";
 
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        private final static String WITHIN_ATTRIBUTE = "within";
 
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        private final static String EXPRESSION_ATTRIBUTE = "expression";
 
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        private final Definition m_definition;
 
52
        private boolean m_inAspectJ;
 
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        private boolean m_inWeaver;
 
54
        private boolean m_inAspects;
 
55
 
 
56
        private Definition.ConcreteAspect m_lastConcreteAspect;
 
57
 
 
58
        private SimpleAOPParser() {
 
59
                m_definition = new Definition();
 
60
        }
 
61
 
 
62
        public static Definition parse(final URL url) throws Exception {
 
63
                // FileReader freader = new FileReader("/tmp/aop.xml");
 
64
                InputStream in = url.openStream();
 
65
                LightXMLParser xml = new LightXMLParser();
 
66
                xml.parseFromReader(new InputStreamReader(in));
 
67
                SimpleAOPParser sap = new SimpleAOPParser();
 
68
                traverse(sap, xml);
 
69
                return sap.m_definition;
 
70
        }
 
71
 
 
72
        private void startElement(String qName, Map attrMap) throws Exception {
 
73
                if (ASPECT_ELEMENT.equals(qName)) {
 
74
                        String name = (String) attrMap.get(NAME_ATTRIBUTE);
 
75
                        String scopePattern = replaceXmlAnd((String) attrMap
 
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                                        .get(SCOPE_ATTRIBUTE));
 
77
                        String requiredType = (String) attrMap.get(REQUIRES_ATTRIBUTE);
 
78
                        if (!isNull(name)) {
 
79
                                m_definition.getAspectClassNames().add(name);
 
80
                                if (scopePattern != null) {
 
81
                                        m_definition.addScopedAspect(name, scopePattern);
 
82
                                }
 
83
                                if (requiredType != null) {
 
84
                                        m_definition.setAspectRequires(name, requiredType);
 
85
                                }
 
86
                        }
 
87
                } else if (WEAVER_ELEMENT.equals(qName)) {
 
88
                        String options = (String) attrMap.get(OPTIONS_ATTRIBUTE);
 
89
                        if (!isNull(options)) {
 
90
                                m_definition.appendWeaverOptions(options);
 
91
                        }
 
92
                        m_inWeaver = true;
 
93
                } else if (CONCRETE_ASPECT_ELEMENT.equals(qName)) {
 
94
                        String name = (String) attrMap.get(NAME_ATTRIBUTE);
 
95
                        String extend = (String) attrMap.get(EXTEND_ATTRIBUTE);
 
96
                        String precedence = (String) attrMap.get(PRECEDENCE_ATTRIBUTE);
 
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                        String perclause = (String) attrMap.get(PERCLAUSE_ATTRIBUTE);
 
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                        if (!isNull(name)) {
 
99
                                m_lastConcreteAspect = new Definition.ConcreteAspect(name,
 
100
                                                extend, precedence, perclause);
 
101
                                m_definition.getConcreteAspects().add(m_lastConcreteAspect);
 
102
                        }
 
103
                } else if (POINTCUT_ELEMENT.equals(qName)
 
104
                                && m_lastConcreteAspect != null) {
 
105
                        String name = (String) attrMap.get(NAME_ATTRIBUTE);
 
106
                        String expression = (String) attrMap.get(EXPRESSION_ATTRIBUTE);
 
107
                        if (!isNull(name) && !isNull(expression)) {
 
108
                                m_lastConcreteAspect.pointcuts.add(new Definition.Pointcut(
 
109
                                                name, replaceXmlAnd(expression)));
 
110
                        }
 
111
                } else if (ASPECTJ_ELEMENT.equals(qName)) {
 
112
                        if (m_inAspectJ) {
 
113
                                throw new Exception("Found nested <aspectj> element");
 
114
                        }
 
115
                        m_inAspectJ = true;
 
116
                } else if (ASPECTS_ELEMENT.equals(qName)) {
 
117
                        m_inAspects = true;
 
118
                } else if (INCLUDE_ELEMENT.equals(qName) && m_inWeaver) {
 
119
                        String typePattern = getWithinAttribute(attrMap);
 
120
                        if (!isNull(typePattern)) {
 
121
                                m_definition.getIncludePatterns().add(typePattern);
 
122
                        }
 
123
                } else if (EXCLUDE_ELEMENT.equals(qName) && m_inWeaver) {
 
124
                        String typePattern = getWithinAttribute(attrMap);
 
125
                        if (!isNull(typePattern)) {
 
126
                                m_definition.getExcludePatterns().add(typePattern);
 
127
                        }
 
128
                } else if (DUMP_ELEMENT.equals(qName) && m_inWeaver) {
 
129
                        String typePattern = getWithinAttribute(attrMap);
 
130
                        if (!isNull(typePattern)) {
 
131
                                m_definition.getDumpPatterns().add(typePattern);
 
132
                        }
 
133
                        String beforeAndAfter = (String) attrMap
 
134
                                        .get(DUMP_BEFOREANDAFTER_ATTRIBUTE);
 
135
                        if (isTrue(beforeAndAfter)) {
 
136
                                m_definition.setDumpBefore(true);
 
137
                        }
 
138
                        String perWeaverDumpDir = (String) attrMap
 
139
                                        .get(DUMP_PERCLASSLOADERDIR_ATTRIBUTE);
 
140
                        if (isTrue(perWeaverDumpDir)) {
 
141
                                m_definition.setCreateDumpDirPerClassloader(true);
 
142
                        }
 
143
                } else if (EXCLUDE_ELEMENT.equals(qName) && m_inAspects) {
 
144
                        String typePattern = getWithinAttribute(attrMap);
 
145
                        if (!isNull(typePattern)) {
 
146
                                m_definition.getAspectExcludePatterns().add(typePattern);
 
147
                        }
 
148
                } else if (INCLUDE_ELEMENT.equals(qName) && m_inAspects) {
 
149
                        String typePattern = getWithinAttribute(attrMap);
 
150
                        if (!isNull(typePattern)) {
 
151
                                m_definition.getAspectIncludePatterns().add(typePattern);
 
152
                        }
 
153
                } else {
 
154
                        throw new Exception(
 
155
                                        "Unknown element while parsing <aspectj> element: " + qName);
 
156
                }
 
157
        }
 
158
 
 
159
        private void endElement(String qName) throws Exception {
 
160
                if (CONCRETE_ASPECT_ELEMENT.equals(qName)) {
 
161
                        m_lastConcreteAspect = null;
 
162
                } else if (ASPECTJ_ELEMENT.equals(qName)) {
 
163
                        m_inAspectJ = false;
 
164
                } else if (WEAVER_ELEMENT.equals(qName)) {
 
165
                        m_inWeaver = false;
 
166
                } else if (ASPECTS_ELEMENT.equals(qName)) {
 
167
                        m_inAspects = false;
 
168
                }
 
169
        }
 
170
 
 
171
        private String getWithinAttribute(Map attributes) {
 
172
                return replaceXmlAnd((String) attributes.get(WITHIN_ATTRIBUTE));
 
173
        }
 
174
 
 
175
        private static String replaceXmlAnd(String expression) {
 
176
                // TODO AV do we need to handle "..)AND" or "AND(.." ?
 
177
                return LangUtil.replace(expression, " AND ", " && ");
 
178
        }
 
179
 
 
180
        private boolean isNull(String s) {
 
181
                return (s == null || s.length() <= 0);
 
182
        }
 
183
 
 
184
        private boolean isTrue(String s) {
 
185
                return (s != null && s.equals("true"));
 
186
        }
 
187
 
 
188
        private static void traverse(SimpleAOPParser sap, LightXMLParser xml)
 
189
                        throws Exception {
 
190
                sap.startElement(xml.getName(), xml.getAttributes());
 
191
                ArrayList childrens = xml.getChildrens();
 
192
                for (int i = 0; i < childrens.size(); i++) {
 
193
                        LightXMLParser child = (LightXMLParser) childrens.get(i);
 
194
                        traverse(sap, child);
 
195
                }
 
196
                sap.endElement(xml.getName());
 
197
 
 
198
        }
 
199
}