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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during
compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based
@AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step.
This library is a superset of AspectJ weaver and hence also of AspectJ runtime.
/*******************************************************************************
* Copyright (c) 2011 Contributors.
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v 2.0
* which accompanies this distribution and is available at
* https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
*
* Contributors:
* Abraham Nevado - Lucierna initial implementation
* Just a slight variation of current DocumentParser.java from Alexandre Vasseur.
*******************************************************************************/
package org.aspectj.weaver.loadtime.definition;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.Map;
import org.aspectj.util.LangUtil;
import org.aspectj.weaver.loadtime.definition.Definition.AdviceKind;
import org.aspectj.weaver.loadtime.definition.Definition.DeclareAnnotationKind;
import org.xml.sax.SAXException;
/**
* This class has been created to avoid deadlocks when instrumenting SAXParser.
* So it is used as a wrapper for the ligthweigh XML parser LightXMLParser.
*
* @author A. Nevado
*/
public class SimpleAOPParser {
private final static String ASPECTJ_ELEMENT = "aspectj";
private final static String WEAVER_ELEMENT = "weaver";
private final static String DUMP_ELEMENT = "dump";
private final static String DUMP_BEFOREANDAFTER_ATTRIBUTE = "beforeandafter";
private final static String DUMP_PERCLASSLOADERDIR_ATTRIBUTE = "perclassloaderdumpdir";
private final static String INCLUDE_ELEMENT = "include";
private final static String EXCLUDE_ELEMENT = "exclude";
private final static String OPTIONS_ATTRIBUTE = "options";
private final static String ASPECTS_ELEMENT = "aspects";
private final static String ASPECT_ELEMENT = "aspect";
private final static String CONCRETE_ASPECT_ELEMENT = "concrete-aspect";
private final static String NAME_ATTRIBUTE = "name";
private final static String SCOPE_ATTRIBUTE = "scope";
private final static String REQUIRES_ATTRIBUTE = "requires";
private final static String EXTEND_ATTRIBUTE = "extends";
private final static String PRECEDENCE_ATTRIBUTE = "precedence";
private final static String PERCLAUSE_ATTRIBUTE = "perclause";
private final static String POINTCUT_ELEMENT = "pointcut";
private final static String WITHIN_ATTRIBUTE = "within";
private final static String EXPRESSION_ATTRIBUTE = "expression";
private static final String DECLARE_ANNOTATION = "declare-annotation";
private static final String ANNONATION_TAG = "annotation";
private static final String ANNO_KIND_TYPE = "type";
private static final String ANNO_KIND_METHOD = "method";
private static final String ANNO_KIND_FIELD = "field";
private final static String BEFORE_ELEMENT = "before";
private final static String AFTER_ELEMENT = "after";
private final static String AROUND_ELEMENT = "around";
private final Definition m_definition;
private boolean m_inAspectJ;
private boolean m_inWeaver;
private boolean m_inAspects;
private Definition.ConcreteAspect m_lastConcreteAspect;
private SimpleAOPParser() {
m_definition = new Definition();
}
public static Definition parse(final URL url) throws Exception {
// FileReader freader = new FileReader("/tmp/aop.xml");
InputStream in = url.openStream();
LightXMLParser xml = new LightXMLParser();
xml.parseFromReader(new InputStreamReader(in));
SimpleAOPParser sap = new SimpleAOPParser();
traverse(sap, xml);
return sap.m_definition;
}
private void startElement(String qName, Map attrMap) throws Exception {
if (ASPECT_ELEMENT.equals(qName)) {
String name = (String) attrMap.get(NAME_ATTRIBUTE);
String scopePattern = replaceXmlAnd((String) attrMap
.get(SCOPE_ATTRIBUTE));
String requiredType = (String) attrMap.get(REQUIRES_ATTRIBUTE);
if (!isNull(name)) {
m_definition.getAspectClassNames().add(name);
if (scopePattern != null) {
m_definition.addScopedAspect(name, scopePattern);
}
if (requiredType != null) {
m_definition.setAspectRequires(name, requiredType);
}
}
} else if (WEAVER_ELEMENT.equals(qName)) {
String options = (String) attrMap.get(OPTIONS_ATTRIBUTE);
if (!isNull(options)) {
m_definition.appendWeaverOptions(options);
}
m_inWeaver = true;
} else if (CONCRETE_ASPECT_ELEMENT.equals(qName)) {
String name = (String) attrMap.get(NAME_ATTRIBUTE);
String extend = (String) attrMap.get(EXTEND_ATTRIBUTE);
String precedence = (String) attrMap.get(PRECEDENCE_ATTRIBUTE);
String perclause = (String) attrMap.get(PERCLAUSE_ATTRIBUTE);
if (!isNull(name)) {
m_lastConcreteAspect = new Definition.ConcreteAspect(name,
extend, precedence, perclause);
m_definition.getConcreteAspects().add(m_lastConcreteAspect);
}
} else if (POINTCUT_ELEMENT.equals(qName)
&& m_lastConcreteAspect != null) {
String name = (String) attrMap.get(NAME_ATTRIBUTE);
String expression = (String) attrMap.get(EXPRESSION_ATTRIBUTE);
if (!isNull(name) && !isNull(expression)) {
m_lastConcreteAspect.pointcuts.add(new Definition.Pointcut(
name, replaceXmlAnd(expression)));
}
} else if (ASPECTJ_ELEMENT.equals(qName)) {
if (m_inAspectJ) {
throw new Exception("Found nested element");
}
m_inAspectJ = true;
} else if (ASPECTS_ELEMENT.equals(qName)) {
m_inAspects = true;
} else if (INCLUDE_ELEMENT.equals(qName) && m_inWeaver) {
String typePattern = getWithinAttribute(attrMap);
if (!isNull(typePattern)) {
m_definition.getIncludePatterns().add(typePattern);
}
} else if (EXCLUDE_ELEMENT.equals(qName) && m_inWeaver) {
String typePattern = getWithinAttribute(attrMap);
if (!isNull(typePattern)) {
m_definition.getExcludePatterns().add(typePattern);
}
} else if (DUMP_ELEMENT.equals(qName) && m_inWeaver) {
String typePattern = getWithinAttribute(attrMap);
if (!isNull(typePattern)) {
m_definition.getDumpPatterns().add(typePattern);
}
String beforeAndAfter = (String) attrMap
.get(DUMP_BEFOREANDAFTER_ATTRIBUTE);
if (isTrue(beforeAndAfter)) {
m_definition.setDumpBefore(true);
}
String perWeaverDumpDir = (String) attrMap
.get(DUMP_PERCLASSLOADERDIR_ATTRIBUTE);
if (isTrue(perWeaverDumpDir)) {
m_definition.setCreateDumpDirPerClassloader(true);
}
} else if (EXCLUDE_ELEMENT.equals(qName) && m_inAspects) {
String typePattern = getWithinAttribute(attrMap);
if (!isNull(typePattern)) {
m_definition.getAspectExcludePatterns().add(typePattern);
}
} else if (INCLUDE_ELEMENT.equals(qName) && m_inAspects) {
String typePattern = getWithinAttribute(attrMap);
if (!isNull(typePattern)) {
m_definition.getAspectIncludePatterns().add(typePattern);
}
}else if (DECLARE_ANNOTATION.equals(qName) && m_inAspects) {
String anno = (String) attrMap.get(ANNONATION_TAG);
if (!isNull(anno)){
String pattern = (String) attrMap.get(ANNO_KIND_FIELD);
if (pattern != null){
m_lastConcreteAspect.declareAnnotations.add(new Definition.DeclareAnnotation(
DeclareAnnotationKind.Field, pattern, anno));
}
else{
pattern = (String) attrMap.get(ANNO_KIND_METHOD);
if (pattern != null){
m_lastConcreteAspect.declareAnnotations.add(new Definition.DeclareAnnotation(
DeclareAnnotationKind.Method, pattern, anno));
}
else{
pattern = (String) attrMap.get(ANNO_KIND_TYPE);
if (pattern != null){
m_lastConcreteAspect.declareAnnotations.add(new Definition.DeclareAnnotation(
DeclareAnnotationKind.Type, pattern, anno));
}
}
}
}
}
else if (BEFORE_ELEMENT.equals(qName) && m_inAspects ) {
String pointcut = (String) attrMap.get(POINTCUT_ELEMENT);
String adviceClass = (String) attrMap.get("invokeClass");
String adviceMethod = (String) attrMap.get("invokeMethod");
if (!isNull(pointcut) && !isNull(adviceClass) && !isNull(adviceMethod)) {
m_lastConcreteAspect.pointcutsAndAdvice.add(new Definition.PointcutAndAdvice(AdviceKind.Before,
replaceXmlAnd(pointcut), adviceClass, adviceMethod));
} else {
throw new SAXException("Badly formed element");
}
} else if (AFTER_ELEMENT.equals(qName) && m_inAspects) {
String pointcut = (String) attrMap.get(POINTCUT_ELEMENT);
String adviceClass = (String) attrMap.get("invokeClass");
String adviceMethod = (String) attrMap.get("invokeMethod");
if (!isNull(pointcut) && !isNull(adviceClass) && !isNull(adviceMethod)) {
m_lastConcreteAspect.pointcutsAndAdvice.add(new Definition.PointcutAndAdvice(AdviceKind.After,
replaceXmlAnd(pointcut), adviceClass, adviceMethod));
} else {
throw new SAXException("Badly formed element");
}
} else if (AROUND_ELEMENT.equals(qName) && m_inAspects) {
String pointcut = (String) attrMap.get(POINTCUT_ELEMENT);
String adviceClass = (String) attrMap.get("invokeClass");
String adviceMethod = (String) attrMap.get("invokeMethod");
if (!isNull(pointcut) && !isNull(adviceClass) && !isNull(adviceMethod)) {
m_lastConcreteAspect.pointcutsAndAdvice.add(new Definition.PointcutAndAdvice(AdviceKind.Around,
replaceXmlAnd(pointcut), adviceClass, adviceMethod));
}
}
else {
throw new Exception(
"Unknown element while parsing element: " + qName);
}
}
private void endElement(String qName) throws Exception {
if (CONCRETE_ASPECT_ELEMENT.equals(qName)) {
m_lastConcreteAspect = null;
} else if (ASPECTJ_ELEMENT.equals(qName)) {
m_inAspectJ = false;
} else if (WEAVER_ELEMENT.equals(qName)) {
m_inWeaver = false;
} else if (ASPECTS_ELEMENT.equals(qName)) {
m_inAspects = false;
}
}
private String getWithinAttribute(Map attributes) {
return replaceXmlAnd((String) attributes.get(WITHIN_ATTRIBUTE));
}
private static String replaceXmlAnd(String expression) {
// TODO AV do we need to handle "..)AND" or "AND(.." ?
return LangUtil.replace(expression, " AND ", " && ");
}
private boolean isNull(String s) {
return (s == null || s.length() <= 0);
}
private boolean isTrue(String s) {
return (s != null && s.equals("true"));
}
private static void traverse(SimpleAOPParser sap, LightXMLParser xml)
throws Exception {
sap.startElement(xml.getName(), xml.getAttributes());
Iterable childrens = xml.getChildrens();
for (LightXMLParser child : childrens) {
traverse(sap, child);
}
sap.endElement(xml.getName());
}
}