/*
* 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 net.formio.binding;
import java.util.Collections;
/**
* Instantiator that already holds ready instance.
* @author Radek Beran
*/
public class InstanceHoldingInstantiator<U> implements Instantiator {
private final U instance;
public InstanceHoldingInstantiator(U instance) {
if (instance == null) throw new IllegalArgumentException("Instance cannot be null");
this.instance = instance;
}
@Override
public <T> T instantiate(Class<T> objClass, ConstructionDescription cd, Object... args) {
return objClass.cast(instance);
}
@Override
public <T> ConstructionDescription getDescription(Class<T> objClass, ArgumentNameResolver argNameResolver) {
return new DefaultConstructionDescription(objClass, null, Collections.<String>emptyList());
}
}