/* * 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()); } }