public static VariantsMetaData extractFrom(BinarySpec spec) {
Map<String, Object> variants = Maps.newHashMap();
Class<? extends BinarySpec> specClass = spec.getClass();
Set<Class<?>> interfaces = ClassInspector.inspect(specClass).getSuperTypes();
for (Class<?> intf : interfaces) {
ClassDetails details = ClassInspector.inspect(intf);
Collection<? extends PropertyDetails> properties = details.getProperties();
for (PropertyDetails property : properties) {
List<Method> getters = property.getGetters();
for (Method getter : getters) {
if (getter.getAnnotation(Variant.class) != null) {
extractVariant(variants, spec, property.getName(), getter);
}
}
}
}
return new DefaultVariantsMetaData(Collections.unmodifiableMap(variants));
}
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);
}
}
}