com.google.inject.DefaultConstructionProxyFactory Maven / Gradle / Ivy
/**
* 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.internal.BytecodeGen;
import com.google.inject.internal.BytecodeGen.Visibility;
import com.google.inject.internal.ImmutableMap;
import com.google.inject.spi.InjectionPoint;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.List;
/**
* Produces construction proxies that invoke the class constructor.
*
* @author [email protected] (Bob Lee)
*/
class DefaultConstructionProxyFactory implements ConstructionProxyFactory {
private final InjectionPoint injectionPoint;
/**
* @param injectionPoint an injection point whose member is a constructor of {@code T}.
*/
DefaultConstructionProxyFactory(InjectionPoint injectionPoint) {
this.injectionPoint = injectionPoint;
}
public ConstructionProxy create() {
@SuppressWarnings("unchecked") // the injection point is for a constructor of T
final Constructor constructor = (Constructor) injectionPoint.getMember();
// Use FastConstructor if the constructor is public.
if (Modifier.isPublic(constructor.getModifiers())) {
} else {
constructor.setAccessible(true);
}
return new ConstructionProxy() {
public T newInstance(Object... arguments) throws InvocationTargetException {
try {
return constructor.newInstance(arguments);
} catch (InstantiationException e) {
throw new AssertionError(e); // shouldn't happen, we know this is a concrete type
} catch (IllegalAccessException e) {
throw new AssertionError(e); // a security manager is blocking us, we're hosed
}
}
public InjectionPoint getInjectionPoint() {
return injectionPoint;
}
public Constructor getConstructor() {
return constructor;
}
};
}
}