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. 014 015 package org.apache.tapestry.enhance; 016 017 import java.util.Iterator; 018 import java.util.Map; 019 020 import org.apache.hivemind.ErrorLog; 021 import org.apache.tapestry.spec.IComponentSpecification; 022 import org.apache.tapestry.spec.InjectSpecification; 023 024 /** 025 * Iterates over the {@link org.apache.tapestry.spec.InjectSpecification}s and locates and 026 * delegates to a {@link org.apache.tapestry.enhance.InjectEnhancementWorker} for each one. 027 * 028 * @author Howard M. Lewis Ship 029 * @since 4.0 030 */ 031 public class DispatchToInjectWorker implements EnhancementWorker 032 { 033 private ErrorLog _errorLog; 034 035 private Map _injectWorkers; 036 037 public void performEnhancement(EnhancementOperation op, IComponentSpecification spec) 038 { 039 Iterator i = spec.getInjectSpecifications().iterator(); 040 041 while (i.hasNext()) 042 { 043 InjectSpecification is = (InjectSpecification) i.next(); 044 045 invokeWorker(op, is); 046 } 047 } 048 049 private void invokeWorker(EnhancementOperation op, InjectSpecification spec) 050 { 051 try 052 { 053 InjectEnhancementWorker worker = (InjectEnhancementWorker) _injectWorkers.get(spec 054 .getType()); 055 056 if (worker == null) 057 { 058 _errorLog.error(EnhanceMessages.unknownInjectType(spec.getProperty(), spec 059 .getType()), spec.getLocation(), null); 060 return; 061 } 062 063 worker.performEnhancement(op, spec); 064 065 } 066 catch (Exception ex) 067 { 068 _errorLog.error(EnhanceMessages.errorAddingProperty(spec.getProperty(), op 069 .getBaseClass(), ex), spec.getLocation(), ex); 070 } 071 } 072 073 public void setErrorLog(ErrorLog errorLog) 074 { 075 _errorLog = errorLog; 076 } 077 078 public void setInjectWorkers(Map injectWorkers) 079 { 080 _injectWorkers = injectWorkers; 081 } 082 }