001/* 002 * Copyright 2010 Anyware Services 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.ametys.plugins.workflow.support; 017 018import java.util.Map; 019 020import org.apache.avalon.framework.service.ServiceException; 021import org.apache.avalon.framework.service.ServiceManager; 022 023import com.opensymphony.workflow.Condition; 024import com.opensymphony.workflow.FunctionProvider; 025import com.opensymphony.workflow.Register; 026import com.opensymphony.workflow.TypeResolver; 027import com.opensymphony.workflow.Validator; 028import com.opensymphony.workflow.WorkflowException; 029 030/** 031 * Avalon-aware type resolver. 032 * <p> 033 * Used for retreiving avalon component using the {@link ServiceManager} and a 034 * role. 035 */ 036public class AvalonTypeResolver extends TypeResolver 037{ 038 private static final String __AVALON_TYPE = "avalon"; 039 private static final String __ROLE = "role"; 040 private ServiceManager _serviceManager; 041 042 /** 043 * Create an avalon type resolver. 044 * 045 * @param serviceManager the service manager. 046 */ 047 public AvalonTypeResolver(ServiceManager serviceManager) 048 { 049 _serviceManager = serviceManager; 050 } 051 052 @Override 053 public Condition getCondition(String type, Map args) throws WorkflowException 054 { 055 if (__AVALON_TYPE.equals(type)) 056 { 057 return (Condition) _getComponent((String) args.get(__ROLE)); 058 } 059 060 return super.getCondition(type, args); 061 } 062 063 @Override 064 public FunctionProvider getFunction(String type, Map args) throws WorkflowException 065 { 066 if (__AVALON_TYPE.equals(type)) 067 { 068 return (FunctionProvider) _getComponent((String) args.get(__ROLE)); 069 } 070 071 return super.getFunction(type, args); 072 } 073 074 @Override 075 public Register getRegister(String type, Map args) throws WorkflowException 076 { 077 if (__AVALON_TYPE.equals(type)) 078 { 079 return (Register) _getComponent((String) args.get(__ROLE)); 080 } 081 082 return super.getRegister(type, args); 083 } 084 085 @Override 086 public Validator getValidator(String type, Map args) throws WorkflowException 087 { 088 if (__AVALON_TYPE.equals(type)) 089 { 090 return (Validator) _getComponent((String) args.get(__ROLE)); 091 } 092 093 return super.getValidator(type, args); 094 } 095 096 private Object _getComponent(String role) throws WorkflowException 097 { 098 if (role == null) 099 { 100 throw new WorkflowException("Missing 'role' argument for avalon type"); 101 } 102 103 try 104 { 105 return _serviceManager.lookup(role); 106 } 107 catch (ServiceException e) 108 { 109 throw new WorkflowException("Unable to retrieve avalon component for role: '" + role + "'", e); 110 } 111 } 112}