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.SortedMap;
021import java.util.TreeMap;
022
023public class DefaultRepository implements Repository {
024    /**
025     * The unmarshaled object instances by name.
026     */
027    private final SortedMap<String, Object> instances = new TreeMap<String, Object>();
028
029    /**
030     * Does this repository contain a object with the specified name.
031     *
032     * @param name the unique name of the object instance
033     * @return true if this repository contain a object with the specified name
034     */
035    public boolean contains(String name) {
036        return instances.containsKey(name);
037    }
038
039    /**
040     * Gets the object or recipe with the specified name from this repository.
041     *
042     * @param name the unique name of the object instance
043     * @return the object instance, a recipe to build the object or null
044     */
045    public Object get(String name) {
046        return instances.get(name);
047    }
048
049    /**
050     * Add an object instance to this repository.
051     *
052     * @param name the unique name of the instance
053     * @param instance the instance
054     * @throws ConstructionException if another object instance is already registered with the name
055     */
056    public void add(String name, Object instance) {
057        if (instances.containsKey(name) && !(instances.get(name) instanceof Recipe)) {
058            throw new ConstructionException("Name " + name + " is already registered to instance " + instance);
059        }
060        instances.put(name, instance);
061    }
062}