private ClassMetaData inspectType(Class<?> type) {
boolean isConventionAware = type.getAnnotation(NoConventionMapping.class) == null;
boolean extensible = JavaReflectionUtil.getAnnotation(type, NonExtensible.class) == null;
ClassMetaData classMetaData = new ClassMetaData(extensible, isConventionAware);
inspectType(type, classMetaData);
attachSetMethods(classMetaData);
findMissingClosureOverloads(classMetaData);
classMetaData.complete();
return classMetaData;
}
private void attachSetMethods(ClassMetaData classMetaData) {
for (Method method : classMetaData.setMethods) {
PropertyMetaData property = classMetaData.getProperty(method.getName());
if (property != null) {
property.addSetMethod(method);
}
}
}
private void findMissingClosureOverloads(ClassMetaData classMetaData) {
for (Method method : classMetaData.actionMethods) {
Method overload =
findClosureOverload(method, classMetaData.closureMethods.get(method.getName()));
if (overload == null) {
classMetaData.actionMethodRequiresOverload(method);
}
}
}
private void inspectType(Class<?> type, ClassMetaData classMetaData) {
ClassDetails classDetails = ClassInspector.inspect(type);
for (Method method : classDetails.getAllMethods()) {
if (method.getAnnotation(Inject.class) != null) {
if (!Modifier.isPublic(method.getModifiers())
&& !Modifier.isProtected(method.getModifiers())) {
throw new UnsupportedOperationException(
String.format(
"Cannot attach @Inject to method %s.%s() as it is not public or protected.",
method.getDeclaringClass().getSimpleName(), method.getName()));
}
if (Modifier.isStatic(method.getModifiers())) {
throw new UnsupportedOperationException(
String.format(
"Cannot attach @Inject to method %s.%s() as it is static.",
method.getDeclaringClass().getSimpleName(), method.getName()));
}
}
}
for (PropertyDetails property : classDetails.getProperties()) {
PropertyMetaData propertyMetaData = classMetaData.property(property.getName());
for (Method method : property.getGetters()) {
propertyMetaData.addGetter(method);
}
for (Method method : property.getSetters()) {
propertyMetaData.addSetter(method);
}
}
for (Method method : classDetails.getInstanceMethods()) {
Class<?>[] parameterTypes = method.getParameterTypes();
if (parameterTypes.length == 1) {
classMetaData.addCandidateSetMethod(method);
}
if (parameterTypes.length > 0
&& parameterTypes[parameterTypes.length - 1].equals(Action.class)) {
classMetaData.addActionMethod(method);
} else if (parameterTypes.length > 0
&& parameterTypes[parameterTypes.length - 1].equals(Closure.class)) {
classMetaData.addClosureMethod(method);
}
}
}
private <T> Class<? extends T> generateUnderLock(Class<T> type) {
Map<Class<?>, Class<?>> cache = GENERATED_CLASSES.get(getClass());
if (cache == null) {
// WeakHashMap won't work here. It keeps a strong reference to the mapping value, which is the
// generated class in this case
// However, the generated class has a strong reference to the source class (by extending it),
// so the keys will always be
// strongly reachable while this Class is strongly reachable. Use weak references for both key
// and value of the mapping instead.
cache = new ReferenceMap(AbstractReferenceMap.WEAK, AbstractReferenceMap.WEAK);
GENERATED_CLASSES.put(getClass(), cache);
}
Class<?> generatedClass = cache.get(type);
if (generatedClass != null) {
return generatedClass.asSubclass(type);
}
if (Modifier.isPrivate(type.getModifiers())) {
throw new GradleException(
String.format(
"Cannot create a proxy class for private class '%s'.", type.getSimpleName()));
}
if (Modifier.isAbstract(type.getModifiers())) {
throw new GradleException(
String.format(
"Cannot create a proxy class for abstract class '%s'.", type.getSimpleName()));
}
Class<? extends T> subclass;
try {
ClassMetaData classMetaData = inspectType(type);
ClassBuilder<T> builder = start(type, classMetaData);
builder.startClass();
if (!DynamicObjectAware.class.isAssignableFrom(type)) {
if (ExtensionAware.class.isAssignableFrom(type)) {
throw new UnsupportedOperationException(
"A type that implements ExtensionAware must currently also implement DynamicObjectAware.");
}
builder.mixInDynamicAware();
}
if (!GroovyObject.class.isAssignableFrom(type)) {
builder.mixInGroovyObject();
}
builder.addDynamicMethods();
if (classMetaData.conventionAware && !IConventionAware.class.isAssignableFrom(type)) {
builder.mixInConventionAware();
}
Class noMappingClass = Object.class;
for (Class<?> c = type; c != null && noMappingClass == Object.class; c = c.getSuperclass()) {
if (c.getAnnotation(NoConventionMapping.class) != null) {
noMappingClass = c;
}
}
Set<PropertyMetaData> conventionProperties = new HashSet<PropertyMetaData>();
for (PropertyMetaData property : classMetaData.properties.values()) {
if (SKIP_PROPERTIES.contains(property.name)) {
continue;
}
if (property.injector) {
builder.addInjectorProperty(property);
for (Method getter : property.getters) {
builder.applyServiceInjectionToGetter(property, getter);
}
for (Method setter : property.setters) {
builder.applyServiceInjectionToSetter(property, setter);
}
continue;
}
boolean needsConventionMapping = false;
if (classMetaData.isExtensible()) {
for (Method getter : property.getters) {
if (!Modifier.isFinal(getter.getModifiers())
&& !getter.getDeclaringClass().isAssignableFrom(noMappingClass)) {
needsConventionMapping = true;
break;
}
}
}
if (needsConventionMapping) {
conventionProperties.add(property);
builder.addConventionProperty(property);
for (Method getter : property.getters) {
builder.applyConventionMappingToGetter(property, getter);
}
}
if (needsConventionMapping) {
for (Method setter : property.setters) {
if (!Modifier.isFinal(setter.getModifiers())) {
builder.applyConventionMappingToSetter(property, setter);
}
}
}
}
Set<Method> actionMethods = classMetaData.missingOverloads;
for (Method method : actionMethods) {
builder.addActionMethod(method);
}
// Adds a set method for each mutable property
for (PropertyMetaData property : classMetaData.properties.values()) {
if (property.setters.isEmpty()) {
continue;
}
if (Iterable.class.isAssignableFrom(property.getType())) {
// Currently not supported
continue;
}
if (property.setMethods.isEmpty()) {
for (Method setter : property.setters) {
builder.addSetMethod(property, setter);
}
} else if (conventionProperties.contains(property)) {
for (Method setMethod : property.setMethods) {
builder.applyConventionMappingToSetMethod(property, setMethod);
}
}
}
for (Constructor<?> constructor : type.getConstructors()) {
if (Modifier.isPublic(constructor.getModifiers())) {
builder.addConstructor(constructor);
}
}
subclass = builder.generate();
} catch (Throwable e) {
throw new GradleException(
String.format("Could not generate a proxy class for class %s.", type.getName()), e);
}
cache.put(type, subclass);
cache.put(subclass, subclass);
return subclass;
}