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 java.util.Set;
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;
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 {
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 <aspectj> 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 <before> 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 <after> 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 <aspectj> 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) {
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());
ArrayList childrens = xml.getChildrens();
for (int i = 0; i < childrens.size(); i++) {
LightXMLParser child = (LightXMLParser) childrens.get(i);
traverse(sap, child);
}
sap.endElement(xml.getName());
}
}
SimpleAOPParser
ASPECTJ_ELEMENT: String
