public InjectionNode generateProxy(InjectionNode injectionNode) {
if (!aopProxiesGenerated.containsKey(injectionNode.getClassName())) {
InjectionNode proxyInjectionNode = innerGenerateProxyCode(injectionNode);
aopProxiesGenerated.put(injectionNode.getClassName(), proxyInjectionNode);
}
return aopProxiesGenerated.get(injectionNode.getClassName());
}
private void buildMethodInterceptor(
JDefinedClass definedClass,
ConstructorInjectionPoint proxyConstructorInjectionPoint,
JMethod constructor,
JBlock constructorBody,
Map<ASTMethod, Map<InjectionNode, JFieldVar>> interceptorFields,
Map.Entry<ASTMethod, Set<InjectionNode>> methodInterceptorEntry)
throws ClassNotFoundException {
ASTMethod method = methodInterceptorEntry.getKey();
if (method.getAccessModifier().equals(ASTAccessModifier.PRIVATE)) {
throw new TransfuseAnalysisException("Unable to provide AOP on private methods");
}
if (!interceptorFields.containsKey(methodInterceptorEntry.getKey())) {
interceptorFields.put(
methodInterceptorEntry.getKey(), new HashMap<InjectionNode, JFieldVar>());
}
Map<InjectionNode, JFieldVar> injectionNodeInstanceNameMap =
interceptorFields.get(methodInterceptorEntry.getKey());
// setup interceptor fields
for (InjectionNode interceptorInjectionNode : methodInterceptorEntry.getValue()) {
String interceptorInstanceName = namer.generateName(interceptorInjectionNode);
JFieldVar interceptorField =
definedClass.field(
JMod.PRIVATE,
codeModel.ref(interceptorInjectionNode.getClassName()),
interceptorInstanceName);
injectionNodeInstanceNameMap.put(interceptorInjectionNode, interceptorField);
JVar interceptorParam =
constructor.param(
codeModel.ref(interceptorInjectionNode.getClassName()),
namer.generateName(interceptorInjectionNode));
constructorBody.assign(interceptorField, interceptorParam);
proxyConstructorInjectionPoint.addInjectionNode(interceptorInjectionNode);
}
JType returnType = codeModel.parseType(method.getReturnType().getName());
JMethod methodDeclaration =
definedClass.method(
method.getAccessModifier().getCodeModelJMod(), returnType, method.getName());
JBlock body = methodDeclaration.body();
// define method parameter
Map<ASTParameter, JVar> parameterMap = new HashMap<ASTParameter, JVar>();
for (ASTParameter parameter : method.getParameters()) {
parameterMap.put(
parameter,
methodDeclaration.param(
JMod.FINAL,
codeModel.ref(parameter.getASTType().getName()),
namer.generateName(parameter.getASTType())));
}
// aop interceptor
Map<InjectionNode, JFieldVar> interceptorNameMap =
interceptorFields.get(methodInterceptorEntry.getKey());
JArray paramArray = JExpr.newArray(codeModel.ref(Object.class));
for (ASTParameter astParameter : method.getParameters()) {
paramArray.add(parameterMap.get(astParameter));
}
JInvocation interceptorInvocation =
buildInterceptorChain(
definedClass,
method,
parameterMap,
methodInterceptorEntry.getValue(),
interceptorNameMap)
.invoke("invoke");
interceptorInvocation.arg(paramArray);
if (method.getReturnType().equals(ASTVoidType.VOID)) {
body.add(interceptorInvocation);
} else {
body._return(JExpr.cast(returnType.boxify(), interceptorInvocation));
}
}