001// Copyright 2004, 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.services.impl; 016 017import org.apache.hivemind.ApplicationRuntimeException; 018import org.apache.hivemind.Location; 019import org.apache.hivemind.internal.Module; 020import org.apache.hivemind.service.ObjectProvider; 021import org.apache.tapestry.engine.IPropertySource; 022 023/** 024 * An implementation of {@link org.apache.hivemind.service.ObjectProvider} 025 * that gets the actual value from the 026 * <code>tapestry.GlobalPropertySource</code> service. 027 * 028 * @author Howard Lewis Ship 029 * @since 4.0 030 */ 031public class PropertyObjectProvider implements ObjectProvider 032{ 033 private IPropertySource _source; 034 035 /** 036 * Gets the value; the locator is the key passed to 037 * {@link IPropertySource#getPropertyValue(String)}. 038 */ 039 public Object provideObject( 040 Module contributingModule, 041 Class propertyType, 042 String locator, 043 Location location) 044 { 045 try 046 { 047 return _source.getPropertyValue(locator); 048 } 049 catch (Exception ex) 050 { 051 throw new ApplicationRuntimeException(ex.getMessage(), location, ex); 052 } 053 } 054 055 public void setSource(IPropertySource source) 056 { 057 _source = source; 058 } 059 060}