/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.isis.core.commons.lang;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import com.google.common.primitives.Primitives;
import org.apache.isis.core.metamodel.exceptions.MetaModelException;
public class MethodExtensions {
private MethodExtensions() {
}
public static boolean isPublic(final Method method) {
return Modifier.isPublic(method.getModifiers());
}
public static boolean isStatic(final Method method) {
return Modifier.isStatic(method.getModifiers());
}
// //////////////////////////////////////
public static Object invoke(final Method method, final Object object) {
final Object[] parameters = MethodExtensions.getNullOrDefaultArgs(method);
return MethodExtensions.invoke(method, object, parameters);
}
public static Object invoke(final Method method, final Object object, final Object[] arguments) {
try {
Object[] defaultAnyPrimitive = defaultAnyPrimitive(method.getParameterTypes(), arguments);
return method.invoke(object, defaultAnyPrimitive);
} catch (final IllegalArgumentException e) {
throw e;
} catch (final InvocationTargetException e) {
ThrowableExtensions.throwWithinIsisException(e, "Exception executing " + method);
return null;
} catch (final IllegalAccessException e) {
throw new MetaModelException("illegal access of " + method, e);
}
}
private static Object[] defaultAnyPrimitive(Class<?>[] parameterTypes, Object[] arguments) {
if(parameterTypes == null || arguments == null || parameterTypes.length != arguments.length) {
return arguments;
}
final Object[] argumentsWithPrimitivesDefaulted = new Object[arguments.length];
for(int i=0; i<argumentsWithPrimitivesDefaulted.length; i++) {
argumentsWithPrimitivesDefaulted[i] = valueIfPrimitiveThenDefaulted(parameterTypes[i], arguments[i]);
}
return argumentsWithPrimitivesDefaulted;
}
private static Object valueIfPrimitiveThenDefaulted(Class<?> cls, Object argument) {
if(argument != null) {
return argument;
}
if(!cls.isPrimitive()) {
return argument;
}
return ClassUtil.defaultByPrimitiveClass.get(cls);
}
public static Object invokeStatic(final Method method, final Object[] parameters) {
return invoke(method, null, parameters);
}
public static Object invokeStatic(final Method method) {
return invoke(method, null, MethodExtensions.getNullOrDefaultArgs(method));
}
// //////////////////////////////////////
public static Object[] getNullOrDefaultArgs(final Method method) {
final Class<?>[] paramTypes = method.getParameterTypes();
final Object[] parameters = new Object[paramTypes.length];
for (int i = 0; i < parameters.length; i++) {
parameters[i] = ClassExtensions.getNullOrDefault(paramTypes[i]);
}
return parameters;
}
}