001// Copyright 2004, 2005 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.hivemind.lib.impl;
016
017import org.apache.hivemind.ServiceImplementationFactory;
018import org.apache.hivemind.ServiceImplementationFactoryParameters;
019import org.apache.hivemind.impl.BaseLocatable;
020import org.springframework.beans.factory.BeanFactory;
021
022/**
023 * Implementation of {@link org.apache.hivemind.ServiceImplementationFactory} that doesn't create
024 * beans, but instead it looks them up inside a Spring
025 * {@link org.springframework.beans.factory.BeanFactory}.
026 * 
027 * @author Howard Lewis Ship
028 */
029public class SpringLookupFactory extends BaseLocatable implements ServiceImplementationFactory
030{
031    /** @since 1.1 */
032    private BeanFactory _defaultBeanFactory;
033
034    public Object createCoreServiceImplementation(
035            ServiceImplementationFactoryParameters factoryParameters)
036    {
037        SpringBeanParameter p = (SpringBeanParameter) factoryParameters.getFirstParameter();
038        String beanName = p.getName();
039
040        BeanFactory f = p.getBeanFactory();
041
042        if (f == null)
043            f = _defaultBeanFactory;
044
045        return f.getBean(beanName, factoryParameters.getServiceInterface());
046    }
047
048    /** @since 1.1 */
049    public void setDefaultBeanFactory(BeanFactory defaultBeanFactory)
050    {
051        _defaultBeanFactory = defaultBeanFactory;
052    }
053}