org.springframework.objenesis.instantiator.basic.ConstructorInstantiator Maven / Gradle / Ivy
/*
* Copyright 2006-2022 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 org.springframework.objenesis.instantiator.basic;
import java.lang.reflect.Constructor;
import org.springframework.objenesis.ObjenesisException;
import org.springframework.objenesis.instantiator.ObjectInstantiator;
import org.springframework.objenesis.instantiator.annotations.Instantiator;
import org.springframework.objenesis.instantiator.annotations.Typology;
/**
* Instantiates a class by grabbing the no args constructor and calling Constructor.newInstance().
* This can deal with default public constructors, but that's about it.
*
* @author Joe Walnes
* @param Type instantiated
* @see ObjectInstantiator
*/
@Instantiator(Typology.NOT_COMPLIANT)
public class ConstructorInstantiator implements ObjectInstantiator {
protected Constructor constructor;
public ConstructorInstantiator(Class type) {
try {
constructor = type.getDeclaredConstructor((Class[]) null);
}
catch(Exception e) {
throw new ObjenesisException(e);
}
}
public T newInstance() {
try {
return constructor.newInstance((Object[]) null);
}
catch(Exception e) {
throw new ObjenesisException(e);
}
}
}