001// Copyright 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry.engine.state; 016 017import org.apache.hivemind.ApplicationRuntimeException; 018import org.apache.hivemind.impl.BaseLocatable; 019 020/** 021 * Simple state object factory that instantiates an instance of a class. 022 * 023 * @author Howard M. Lewis Ship 024 * @since 4.0 025 */ 026public class InstantiateClassStateObjectFactory extends BaseLocatable implements StateObjectFactory 027{ 028 private Class _objectClass; 029 030 public Object createStateObject() 031 { 032 try 033 { 034 return _objectClass.newInstance(); 035 } 036 catch (Exception ex) 037 { 038 throw new ApplicationRuntimeException(StateMessages.unableToInstantiateObject( 039 _objectClass, 040 ex), getLocation(), ex); 041 } 042 } 043 044 public void setObjectClass(Class objectClass) 045 { 046 _objectClass = objectClass; 047 } 048}