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 */
018package org.apache.xbean.recipe;
019
020import java.util.Map;
021import java.util.Properties;
022import java.lang.reflect.Type;
023
024public 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}