/**
* Resolve current method generic return type to a {@link GenericMetadataSupport}.
*
* @param method Method to resolve the return type.
* @return {@link GenericMetadataSupport} representing this generic return type.
*/
public GenericMetadataSupport resolveGenericReturnType(Method method) {
Type genericReturnType = method.getGenericReturnType();
// logger.log("Method '" + method.toGenericString() + "' has return type : " +
// genericReturnType.getClass().getInterfaces()[0].getSimpleName() + " : " + genericReturnType);
if (genericReturnType instanceof Class) {
return new NotGenericReturnTypeSupport(genericReturnType);
}
if (genericReturnType instanceof ParameterizedType) {
return new ParameterizedReturnType(
this, method.getTypeParameters(), (ParameterizedType) method.getGenericReturnType());
}
if (genericReturnType instanceof TypeVariable) {
return new TypeVariableReturnType(
this, method.getTypeParameters(), (TypeVariable) genericReturnType);
}
throw new MockitoException(
"Ouch, it shouldn't happen, type '"
+ genericReturnType.getClass().getCanonicalName()
+ "' on method : '"
+ method.toGenericString()
+ "' is not supported : "
+ genericReturnType);
}
public static void main(String[]argv) throws Exception {
Method m = Goo.class.getDeclaredMethod("getStrings");
Type t = m.getGenericReturnType();
if (!t.toString().equals("java.util.List<java.lang.String>"))
throw new RuntimeException("Incorrect signature. Signature is "+t);
m = IFace.class.getDeclaredMethod("getStrings");
t = m.getGenericReturnType();
if (!t.toString().equals("java.util.List<java.lang.String>"))
throw new RuntimeException("Incorrect signature. Signature is "+t);
}
public Object invoke(Object target, Method method, Object[] params) throws Throwable {
if (EQUALS_METHOD.equals(method)) {
Object param = params[0];
if (param == null || !Proxy.isProxyClass(param.getClass())) {
return false;
}
InvocationHandler other = Proxy.getInvocationHandler(param);
return equals(other);
} else if (HASHCODE_METHOD.equals(method)) {
return hashCode();
}
MethodInvocation invocation =
new MethodInvocation(
method.getName(),
method.getReturnType(),
method.getGenericReturnType(),
method.getParameterTypes(),
delegate,
params);
invoker.invoke(invocation);
if (!invocation.found()) {
String methodName =
method.getDeclaringClass().getSimpleName() + "." + method.getName() + "()";
throw Exceptions.unsupportedMethod(methodName);
}
return invocation.getResult();
}
public static Class<?> determineGenericsType(Method method, boolean isReadMethod) {
Class<?> result = null;
if (isReadMethod) {
Type parameterType = method.getGenericReturnType();
result = determineGenericsType(parameterType);
} else {
Type[] parameterTypes = method.getGenericParameterTypes();
if (parameterTypes != null) {
result = determineGenericsType(parameterTypes[0]);
}
}
return result;
}
private Class<?> resolveReturnType(Method me) {
Type returnType = me.getGenericReturnType();
if (returnType instanceof ParameterizedType) {
ParameterizedType type = (ParameterizedType) returnType;
Type[] typeArguments = type.getActualTypeArguments();
for (Type typeArgument : typeArguments) {
if (typeArgument instanceof Class<?>) {
return (Class<?>) typeArgument;
}
}
return null;
}
return (Class<?>) returnType;
}
/**
* {@link InvocationHandler} implementation that allows strongly-typed access to the
* configuration.
*
* <p>TODO: it might be a great performance improvement to have APT generate code that does this
* during the development time by looking at the interface.
*/
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
// serve java.lang.Object methods by ourselves
Class<?> clazz = method.getDeclaringClass();
if (clazz == Object.class) {
try {
return method.invoke(this, args);
} catch (InvocationTargetException e) {
throw e.getTargetException();
}
}
if (method.getAnnotation(DuckTyped.class) != null) {
return invokeDuckMethod(method, proxy, args);
}
if (method.getAnnotation(ConfigExtensionMethod.class) != null) {
ConfigExtensionMethod cem = method.getAnnotation(ConfigExtensionMethod.class);
ConfigExtensionHandler handler =
(ConfigExtensionHandler)
((cem.value() != null)
? getServiceLocator().getService(ConfigExtensionHandler.class, cem.value())
: getServiceLocator().getService(ConfigExtensionHandler.class));
return invokeConfigExtensionMethod(handler, this, model.getProxyType(), args);
}
ConfigModel.Property p = model.toProperty(method);
if (p == null)
throw new IllegalArgumentException("No corresponding property found for method: " + method);
if (args == null || args.length == 0) {
// getter
return getter(p, method.getGenericReturnType());
} else {
throw new PropertyVetoException(
"Instance of "
+ getImplementation()
+ " named '"
+ getKey()
+ "' is not locked for writing when invoking method "
+ method.getName()
+ " you must use transaction semantics to access it.",
null);
}
}
private JSONArray getClassProperties(Class<?> clazz, int level) throws IntrospectionException {
JSONArray arr = new JSONArray();
TypeDiscoverer td = new TypeDiscoverer();
try {
for (PropertyDescriptor pd : Introspector.getBeanInfo(clazz).getPropertyDescriptors()) {
Method readMethod = pd.getReadMethod();
if (readMethod != null) {
if (readMethod.getDeclaringClass() == java.lang.Enum.class) {
// skip getDeclaringClass
continue;
} else if ("class".equals(pd.getName())) {
// skip getClass
continue;
}
} else {
// yields com.datatorrent.api.Context on JDK6 and
// com.datatorrent.api.Context.OperatorContext with JDK7
if ("up".equals(pd.getName())
&& com.datatorrent.api.Context.class.isAssignableFrom(pd.getPropertyType())) {
continue;
}
}
// LOG.info("name: " + pd.getName() + " type: " + pd.getPropertyType());
Class<?> propertyType = pd.getPropertyType();
if (propertyType != null) {
JSONObject propertyObj = new JSONObject();
propertyObj.put("name", pd.getName());
propertyObj.put("canGet", readMethod != null);
propertyObj.put("canSet", pd.getWriteMethod() != null);
if (readMethod != null) {
for (Class<?> c = clazz; c != null; c = c.getSuperclass()) {
OperatorClassInfo oci = classInfo.get(c.getName());
if (oci != null) {
MethodInfo getMethodInfo = oci.getMethods.get(readMethod.getName());
if (getMethodInfo != null) {
addTagsToProperties(getMethodInfo, propertyObj);
break;
}
}
}
// type can be a type symbol or parameterized type
td.setTypeArguments(clazz, readMethod.getGenericReturnType(), propertyObj);
} else {
if (pd.getWriteMethod() != null) {
td.setTypeArguments(
clazz, pd.getWriteMethod().getGenericParameterTypes()[0], propertyObj);
}
}
// if (!propertyType.isPrimitive() && !propertyType.isEnum() && !propertyType.isArray() &&
// !propertyType.getName().startsWith("java.lang") && level < MAX_PROPERTY_LEVELS) {
// propertyObj.put("properties", getClassProperties(propertyType, level + 1));
// }
arr.put(propertyObj);
}
}
} catch (JSONException ex) {
throw new RuntimeException(ex);
}
return arr;
}
