public CharSequence apply(ImportManager importManager) {
JvmOperation cacheMethod =
(JvmOperation)
logicalContainerProvider.getLogicalContainer(createExtensionInfo.getCreateExpression());
StringBuilderBasedAppendable appendable = new StringBuilderBasedAppendable(importManager);
JvmDeclaredType containerType = cacheMethod.getDeclaringType();
JvmTypeReference listType = typeReferences.getTypeForName(ArrayList.class, containerType);
JvmTypeReference collectonLiterals =
typeReferences.getTypeForName(CollectionLiterals.class, containerType);
String cacheVarName = cacheField.getSimpleName();
String cacheKeyVarName = appendable.declareVariable("CacheKey", "_cacheKey");
appendable.append("final ");
typeReferenceSerializer.serialize(listType, containerType, appendable);
appendable.append(cacheKeyVarName).append(" = ");
typeReferenceSerializer.serialize(collectonLiterals, containerType, appendable);
appendable.append(".newArrayList(");
EList<JvmFormalParameter> list = cacheMethod.getParameters();
for (Iterator<JvmFormalParameter> iterator = list.iterator(); iterator.hasNext(); ) {
JvmFormalParameter jvmFormalParameter = iterator.next();
appendable.append(getVarName(jvmFormalParameter));
if (iterator.hasNext()) {
appendable.append(", ");
}
}
appendable.append(");");
// declare result variable
JvmTypeReference returnType = typeProvider.getType(createExtensionInfo.getCreateExpression());
appendable.append("\nfinal ");
typeReferenceSerializer.serialize(returnType, containerType, appendable);
String resultVarName = "_result";
appendable.append(" ").append(resultVarName).append(";");
// open synchronize block
appendable.append("\nsynchronized (").append(cacheVarName).append(") {");
appendable.increaseIndentation();
// if the cache contains the key return the previously created object.
appendable
.append("\nif (")
.append(cacheVarName)
.append(".containsKey(")
.append(cacheKeyVarName)
.append(")) {");
appendable.increaseIndentation();
appendable
.append("\nreturn ")
.append(cacheVarName)
.append(".get(")
.append(cacheKeyVarName)
.append(");");
appendable.decreaseIndentation().append("\n}");
// execute the creation
compiler.toJavaStatement(createExtensionInfo.getCreateExpression(), appendable, true);
appendable.append("\n");
appendable.append(resultVarName).append(" = ");
compiler.toJavaExpression(createExtensionInfo.getCreateExpression(), appendable);
appendable.append(";");
// store the newly created object in the cache
appendable
.append("\n")
.append(cacheVarName)
.append(".put(")
.append(cacheKeyVarName)
.append(", ")
.append(resultVarName)
.append(");");
// close synchronize block
appendable.decreaseIndentation();
appendable.append("\n}");
appendable
.append("\n")
.append(initializerMethod.getSimpleName())
.append("(")
.append(resultVarName);
for (JvmFormalParameter parameter : cacheMethod.getParameters()) {
appendable.append(", ").append(parameter.getName());
}
appendable.append(");");
// return the result
appendable.append("\nreturn ");
appendable.append(resultVarName).append(";");
return appendable.toString();
}
protected void transform(XtendFunction source, JvmGenericType container) {
JvmOperation operation = typesFactory.createJvmOperation();
container.getMembers().add(operation);
associator.associatePrimary(source, operation);
String sourceName = source.getName();
JvmVisibility visibility = source.getVisibility();
if (source.isDispatch()) {
if (!source.eIsSet(Xtend2Package.Literals.XTEND_FUNCTION__VISIBILITY))
visibility = JvmVisibility.PROTECTED;
sourceName = "_" + sourceName;
}
operation.setSimpleName(sourceName);
operation.setVisibility(visibility);
operation.setStatic(source.isStatic());
for (XtendParameter parameter : source.getParameters()) {
JvmFormalParameter jvmParam = typesFactory.createJvmFormalParameter();
jvmParam.setName(parameter.getName());
jvmParam.setParameterType(cloneWithProxies(parameter.getParameterType()));
operation.getParameters().add(jvmParam);
associator.associate(parameter, jvmParam);
jvmTypesBuilder.translateAnnotationsTo(parameter.getAnnotations(), jvmParam);
}
JvmTypeReference returnType = null;
if (source.getReturnType() != null) {
returnType = cloneWithProxies(source.getReturnType());
} else {
returnType = getTypeProxy(operation);
}
operation.setReturnType(returnType);
copyAndFixTypeParameters(source.getTypeParameters(), operation);
for (JvmTypeReference exception : source.getExceptions()) {
operation.getExceptions().add(cloneWithProxies(exception));
}
jvmTypesBuilder.translateAnnotationsTo(source.getAnnotationInfo().getAnnotations(), operation);
CreateExtensionInfo createExtensionInfo = source.getCreateExtensionInfo();
if (createExtensionInfo != null) {
JvmTypeReference arrayList =
typeReferences.getTypeForName(ArrayList.class, container, typeReferences.wildCard());
JvmTypeReference hashMap =
typeReferences.getTypeForName(
HashMap.class, container, arrayList, cloneWithProxies(returnType));
JvmField cacheVar =
jvmTypesBuilder.toField(
source, CREATE_CHACHE_VARIABLE_PREFIX + source.getName(), hashMap);
cacheVar.setFinal(true);
jvmTypesBuilder.setInitializer(cacheVar, compileStrategies.forCacheVariable(container));
container.getMembers().add(cacheVar);
JvmOperation initializer = typesFactory.createJvmOperation();
container.getMembers().add(initializer);
initializer.setSimpleName(CREATE_INITIALIZER_PREFIX + source.getName());
initializer.setVisibility(JvmVisibility.PRIVATE);
initializer.setReturnType(typeReferences.getTypeForName(Void.TYPE, source));
for (JvmTypeReference exception : source.getExceptions()) {
initializer.getExceptions().add(cloneWithProxies(exception));
}
jvmTypesBuilder.setBody(
operation, compileStrategies.forCacheMethod(createExtensionInfo, cacheVar, initializer));
// the first parameter is the created object
JvmFormalParameter jvmParam = typesFactory.createJvmFormalParameter();
jvmParam.setName(createExtensionInfo.getName());
jvmParam.setParameterType(getTypeProxy(createExtensionInfo.getCreateExpression()));
initializer.getParameters().add(jvmParam);
associator.associate(createExtensionInfo, jvmParam);
// add all others
for (XtendParameter parameter : source.getParameters()) {
jvmParam = typesFactory.createJvmFormalParameter();
jvmParam.setName(parameter.getName());
jvmParam.setParameterType(cloneWithProxies(parameter.getParameterType()));
initializer.getParameters().add(jvmParam);
associator.associate(parameter, jvmParam);
}
associator.associate(source, initializer);
associator.associateLogicalContainer(createExtensionInfo.getCreateExpression(), operation);
associator.associateLogicalContainer(source.getExpression(), initializer);
} else {
associator.associateLogicalContainer(source.getExpression(), operation);
}
jvmTypesBuilder.setDocumentation(operation, jvmTypesBuilder.getDocumentation(source));
}