/**
* Looks up the aspect class name, based on the qualified name of the aspect.
*
* @param loader
* @param qualifiedName
* @return
*/
private static String lookupAspectClassName(
final ClassLoader loader, final String qualifiedName) {
if (qualifiedName.indexOf('/') <= 0) {
// no uuid
return null;
}
final Set definitionsBottomUp =
SystemDefinitionContainer.getRegularAndVirtualDefinitionsFor(loader);
// TODO: bottom up is broken now
// Collections.reverse(definitionsBottomUp);
for (Iterator iterator = definitionsBottomUp.iterator(); iterator.hasNext(); ) {
SystemDefinition definition = (SystemDefinition) iterator.next();
for (Iterator iterator1 = definition.getAspectDefinitions().iterator();
iterator1.hasNext(); ) {
AspectDefinition aspectDefinition = (AspectDefinition) iterator1.next();
if (qualifiedName.equals(aspectDefinition.getQualifiedName())) {
return aspectDefinition.getClassName();
}
}
}
return null;
}
/**
* Transforms the call side pointcuts.
*
* @param context the transformation context
* @param klass the class set.
*/
public void transform(final Context context, final Klass klass)
throws NotFoundException, CannotCompileException {
List definitions = SystemDefinitionContainer.getDefinitionsContext();
m_joinPointIndex =
TransformationUtil.getJoinPointIndex(klass.getCtClass()); // TODO thread safe reentrant
for (Iterator it = definitions.iterator(); it.hasNext(); ) {
final SystemDefinition definition = (SystemDefinition) it.next();
final CtClass ctClass = klass.getCtClass();
final ClassMetaData classMetaData = context.getMetaDataMaker().createClassMetaData(ctClass);
// filter caller classes
if (classFilter(definition, classMetaData, ctClass)) {
continue;
}
ctClass.instrument(
new ExprEditor() {
public void edit(MethodCall methodCall) throws CannotCompileException {
try {
CtBehavior where = null;
try {
where = methodCall.where();
} catch (RuntimeException e) {
// <clinit> access leads to a bug in Javassist
where = ctClass.getClassInitializer();
}
// filter caller methods
if (methodFilterCaller(where)) {
return;
}
// get the callee method name, signature and class name
CtMethod calleeMethod = methodCall.getMethod();
String calleeClassName = methodCall.getClassName();
// filter callee classes
if (!definition.inIncludePackage(calleeClassName)) {
return;
}
// filter callee methods
if (methodFilterCallee(calleeMethod)) {
return;
}
// create the class meta-data
ClassMetaData calleeSideClassMetaData;
try {
calleeSideClassMetaData =
context
.getMetaDataMaker()
.createClassMetaData(context.getClassPool().get(calleeClassName));
} catch (NotFoundException e) {
// TODO - AV - 20040507 small fix for test.aopc. that use on the fly generated
// classes
if (calleeClassName.equals(ctClass.getName())) {
calleeSideClassMetaData = classMetaData;
} else {
throw new WrappedRuntimeException(e);
}
}
// create the method meta-data
MethodMetaData calleeSideMethodMetaData =
JavassistMetaDataMaker.createMethodMetaData(methodCall.getMethod());
// is this a caller side method pointcut?
if (definition.isPickedOutByCallPointcut(
calleeSideClassMetaData, calleeSideMethodMetaData)) {
// // TODO: should this caller data be passed to the
// join point? It is possible.
// String callerMethodName = callerBehaviour.getName();
// String callerMethodSignature =
// callerBehaviour.getSignature();
// CtClass[] callerMethodParameterTypes =
// callerBehaviour.getParameterTypes();
// int callerMethodModifiers =
// callerBehaviour.getModifiers();
// check the callee class is not the same as target class, if that is the case
// then we have have class loaded and set in the ___AW_clazz already
String declaringClassMethodName = TransformationUtil.STATIC_CLASS_FIELD;
CtMethod method = methodCall.getMethod();
CtClass declaringClass = method.getDeclaringClass();
if (!declaringClass
.getName()
.replace('/', '.')
.equals(where.getDeclaringClass().getName().replace('/', '.'))) {
declaringClassMethodName = addCalleeMethodDeclaringClassField(ctClass, method);
}
// call the wrapper method instead of the callee method
StringBuffer body = new StringBuffer();
StringBuffer callBody = new StringBuffer();
callBody.append(TransformationUtil.JOIN_POINT_MANAGER_FIELD);
callBody.append('.');
callBody.append(TransformationUtil.PROCEED_WITH_CALL_JOIN_POINT_METHOD);
callBody.append('(');
callBody.append(TransformationUtil.calculateHash(method));
callBody.append(',');
callBody.append(m_joinPointIndex);
callBody.append(", args");
callBody.append(", $0, declaringClassMethodName, ");
callBody.append(TransformationUtil.JOIN_POINT_TYPE_METHOD_CALL);
callBody.append(");");
body.append('{');
if (method.getParameterTypes().length > 0) {
body.append("Object[] args = $args; ");
} else {
body.append("Object[] args = null; ");
}
body.append("Class declaringClassMethodName = ");
body.append(declaringClassMethodName);
body.append("; ");
if (methodCall.getMethod().getReturnType() == CtClass.voidType) {
body.append("$_ = ").append(callBody.toString()).append("}");
} else if (!methodCall.getMethod().getReturnType().isPrimitive()) {
body.append("$_ = ($r)");
body.append(callBody.toString());
body.append("}");
} else {
String localResult = TransformationUtil.ASPECTWERKZ_PREFIX + "res";
body.append("Object ").append(localResult).append(" = ");
body.append(callBody.toString());
body.append("if (").append(localResult).append(" != null)");
body.append("$_ = ($r) ").append(localResult).append("; else ");
body.append("$_ = ");
body.append(
JavassistHelper.getDefaultPrimitiveValue(
methodCall.getMethod().getReturnType()));
body.append("; }");
}
methodCall.replace(body.toString());
context.markAsAdvised();
m_joinPointIndex++;
}
} catch (NotFoundException nfe) {
nfe.printStackTrace();
// TODO: should we swallow this exception?
}
}
});
}
TransformationUtil.setJoinPointIndex(klass.getCtClass(), m_joinPointIndex);
}
/**
* Creates a new aspect container.
*
* @param aspectClass the aspect class
*/
private static AspectContainer createAspectContainer(final Class aspectClass) {
AspectDefinition aspectDefinition = null;
Set definitions =
SystemDefinitionContainer.getRegularAndVirtualDefinitionsFor(aspectClass.getClassLoader());
for (Iterator iterator = definitions.iterator();
iterator.hasNext() && aspectDefinition == null; ) {
SystemDefinition systemDefinition = (SystemDefinition) iterator.next();
for (Iterator iterator1 = systemDefinition.getAspectDefinitions().iterator();
iterator1.hasNext(); ) {
AspectDefinition aspectDef = (AspectDefinition) iterator1.next();
if (aspectClass.getName().replace('/', '.').equals(aspectDef.getClassName())) {
aspectDefinition = aspectDef;
break;
}
}
}
if (aspectDefinition == null) {
throw new Error("Could not find AspectDefinition for " + aspectClass.getName());
}
String containerClassName = aspectDefinition.getContainerClassName();
try {
Class containerClass;
if (containerClassName == null
|| aspectClass.getName().equals(CFlowSystemAspect.CLASS_NAME)) {
containerClass =
ContextClassLoader.loadClass(aspectClass.getClassLoader(), DEFAULT_ASPECT_CONTAINER);
} else {
containerClass =
ContextClassLoader.loadClass(aspectClass.getClassLoader(), containerClassName);
}
Constructor constructor = containerClass.getConstructor(new Class[] {AspectContext.class});
final AspectContext aspectContext =
new AspectContext(
aspectDefinition.getSystemDefinition().getUuid(),
aspectClass,
aspectDefinition.getName(),
DeploymentModel.getDeploymentModelAsInt(aspectDefinition.getDeploymentModel()),
aspectDefinition,
aspectDefinition.getParameters());
final AspectContainer container =
(AspectContainer) constructor.newInstance(new Object[] {aspectContext});
aspectContext.setContainer(container);
return container;
} catch (InvocationTargetException e) {
throw new DefinitionException(e.getTargetException().toString());
} catch (NoSuchMethodException e) {
throw new DefinitionException(
"aspect container does not have a valid constructor ["
+ containerClassName
+ "] need to take an AspectContext instance as its only parameter: "
+ e.toString());
} catch (Throwable e) {
StringBuffer cause = new StringBuffer();
cause.append("could not create aspect container using the implementation specified [");
cause.append(containerClassName);
cause.append("] due to: ");
cause.append(e.toString());
e.printStackTrace();
throw new DefinitionException(cause.toString());
}
}
