/**
* Copyright (C) 2006 Google Inc.
*
* Licensed 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 com.google.inject;
import com.google.inject.util.GuiceFastClass;
import com.google.inject.util.Objects;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Modifier;
import net.sf.cglib.reflect.FastClass;
import net.sf.cglib.reflect.FastConstructor;
/**
* Default {@link ConstructionProxyFactory} implementation. Simply invokes the
* constructor. Can be reused by other {@code ConstructionProxyFactory}
* implementations.
*
* @author crazybob@google.com (Bob Lee)
*/
class DefaultConstructionProxyFactory implements ConstructionProxyFactory {
public <T> ConstructionProxy<T> get(final Constructor<T> constructor) {
// We can't use FastConstructor if the constructor is private or protected.
if (Modifier.isPrivate(constructor.getModifiers())
|| Modifier.isProtected(constructor.getModifiers())) {
constructor.setAccessible(true);
return new ConstructionProxy<T>() {
public T newInstance(Object... arguments) throws
InvocationTargetException {
Objects.assertNoNulls(arguments);
try {
return constructor.newInstance(arguments);
}
catch (InstantiationException e) {
throw new RuntimeException(e);
}
catch (IllegalAccessException e) {
throw new AssertionError(e);
}
}
};
}
Class<T> classToConstruct = constructor.getDeclaringClass();
FastClass fastClass = GuiceFastClass.create(classToConstruct);
final FastConstructor fastConstructor
= fastClass.getConstructor(constructor);
return new ConstructionProxy<T>() {
@SuppressWarnings("unchecked")
public T newInstance(Object... arguments)
throws InvocationTargetException {
Objects.assertNoNulls(arguments);
return (T) fastConstructor.newInstance(arguments);
}
};
}
}