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 java.util.Collections; 018import java.util.HashMap; 019 020import org.apache.hivemind.HiveMind; 021 022/** 023 * The default factory for the (default) global application state object. Creates and returns a 024 * synchronized HashMap, if no class name is specified. This duplicates behavior from Tapestry 3.0. 025 * 026 * @author Howard M. Lewis Ship 027 * @since 4.0 028 */ 029public class DefaultGlobalStateObjectFactory extends NamedClassStateObjectFactory implements 030 StateObjectFactory 031{ 032 033 public Object createStateObject() 034 { 035 if (HiveMind.isBlank(getClassName())) 036 return Collections.synchronizedMap(new HashMap()); 037 038 return super.createStateObject(); 039 } 040}