001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.proxy.objenesis; 018 019import org.apache.wicket.WicketRuntimeException; 020import org.apache.wicket.util.lang.Classes; 021 022/** 023 * Instantiator for Objects without default constructor. 024 */ 025@FunctionalInterface 026public interface IInstantiator 027{ 028 /** 029 * Create a new instance. 030 * 031 * @param type 032 * type of instance 033 * @return instance 034 */ 035 <T> T newInstance(Class<T> type); 036 037 static IInstantiator getInstantiator() 038 { 039 try 040 { 041 return new ObjenesisInstantiator(); 042 } 043 catch (NoClassDefFoundError e) 044 { 045 return new IInstantiator() 046 { 047 @Override 048 public <T> T newInstance(Class<T> type) 049 { 050 throw new WicketRuntimeException(String.format( 051 "Can't create proxy for %s without default constructor" 052 + " - you can remedy this by adding Objenesis to your project dependencies.", 053 Classes.name(type))); 054 } 055 }; 056 } 057 } 058}