com.hazelcast.org.objenesis.strategy.SingleInstantiatorStrategy Maven / Gradle / Ivy
/*
* Copyright 2006-2021 the original author or authors.
*
* 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.hazelcast.org.objenesis.strategy;
import com.hazelcast.org.objenesis.ObjenesisException;
import com.hazelcast.org.objenesis.instantiator.ObjectInstantiator;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
/**
* Strategy returning only one instantiator type. Useful if you know on which JVM Objenesis
* will be used and want to specify it explicitly.
*
* @author Henri Tremblay
*/
public class SingleInstantiatorStrategy implements InstantiatorStrategy {
private final Constructor constructor;
/**
* Create a strategy that will return always the same instantiator type. We assume this instantiator
* has one constructor taking the class to instantiate in parameter.
*
* @param the type we want to instantiate
* @param instantiator the instantiator type
*/
public > SingleInstantiatorStrategy(Class instantiator) {
try {
constructor = instantiator.getConstructor(Class.class);
}
catch(NoSuchMethodException e) {
throw new ObjenesisException(e);
}
}
/**
* Return an instantiator for the wanted type and of the one and only type of instantiator returned by this
* class.
*
* @param the type we want to instantiate
* @param type Class to instantiate
* @return The ObjectInstantiator for the class
*/
@SuppressWarnings("unchecked")
public ObjectInstantiator newInstantiatorOf(Class type) {
try {
return (ObjectInstantiator) constructor.newInstance(type);
} catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
throw new ObjenesisException(e);
}
}
}