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.Map;
021    import java.util.Properties;
022    import java.lang.reflect.Type;
023    
024    public class UnsetPropertiesRecipe extends AbstractRecipe {
025        public float getPriority() {
026            return 100;
027        }
028    
029        public boolean canCreate(Type type) {
030            return RecipeHelper.isAssignable(type, Properties.class);
031        }
032    
033        protected Object internalCreate(Type expectedType, boolean lazyRefAllowed) throws ConstructionException {
034            Recipe outerRecipe = RecipeHelper.getCaller();
035            if (!(outerRecipe instanceof ObjectRecipe)) {
036                throw new ConstructionException("UnsetPropertiesRecipe can only be nested in an ObjectRecipe: outerRecipe=" + outerRecipe);
037            }
038            ObjectRecipe objectRecipe = (ObjectRecipe) outerRecipe;
039            Map<String,Object> unsetProperties = objectRecipe.getUnsetProperties();
040    
041            // copy to a properties object
042            Properties properties = new Properties();
043            for (Map.Entry<String, Object> entry : unsetProperties.entrySet()) {
044                properties.put(entry.getKey(), entry.getValue());
045            }
046    
047            // add to execution context if name is specified
048            if (getName() != null) {
049                ExecutionContext.getContext().addObject(getName(), properties);
050            }
051    
052            return properties;
053        }
054    }