001 /** 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.xbean.recipe; 019 020 import java.util.Collections; 021 import java.util.List; 022 import java.lang.reflect.Type; 023 024 import org.apache.xbean.recipe.AbstractRecipe; 025 import org.apache.xbean.recipe.ConstructionException; 026 import org.apache.xbean.recipe.ExecutionContext; 027 import org.apache.xbean.recipe.NoSuchObjectException; 028 import org.apache.xbean.recipe.Recipe; 029 import org.apache.xbean.recipe.RecipeHelper; 030 031 /* 032 * The ReferenceNameRecipe is used to inject the reference name into the object (as a String). 033 * The ReferenceNameRecipe ensures the actual reference object exists before the reference name is injected. 034 */ 035 public class ReferenceNameRecipe extends AbstractRecipe { 036 037 private String referenceName; 038 039 public ReferenceNameRecipe(String referenceName) { 040 this.referenceName = referenceName; 041 } 042 043 public String getReferenceName() { 044 return referenceName; 045 } 046 047 private Object getReference() { 048 if (referenceName == null) { 049 throw new ConstructionException("Reference name has not been set"); 050 } 051 ExecutionContext context = ExecutionContext.getContext(); 052 if (!context.containsObject(referenceName)) { 053 throw new NoSuchObjectException(referenceName); 054 } 055 return context.getObject(referenceName); 056 } 057 058 public List<Recipe> getNestedRecipes() { 059 Object object = getReference(); 060 if (object instanceof Recipe) { 061 Recipe recipe = (Recipe) object; 062 return Collections.singletonList(recipe); 063 } else { 064 return Collections.emptyList(); 065 } 066 } 067 068 public List<Recipe> getConstructorRecipes() { 069 return getNestedRecipes(); 070 } 071 072 public boolean canCreate(Type type) { 073 Object object = getReference(); 074 return String.class == RecipeHelper.toClass(type); 075 } 076 077 protected Object internalCreate(Type expectedType, boolean lazyRefAllowed) throws ConstructionException { 078 Object object = getReference(); 079 return referenceName; 080 } 081 082 }