001/*
002 * Copyright 2002-2012 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.beans.factory;
018
019import org.springframework.lang.Nullable;
020
021/**
022 * Sub-interface implemented by bean factories that can be part
023 * of a hierarchy.
024 *
025 * <p>The corresponding {@code setParentBeanFactory} method for bean
026 * factories that allow setting the parent in a configurable
027 * fashion can be found in the ConfigurableBeanFactory interface.
028 *
029 * @author Rod Johnson
030 * @author Juergen Hoeller
031 * @since 07.07.2003
032 * @see org.springframework.beans.factory.config.ConfigurableBeanFactory#setParentBeanFactory
033 */
034public interface HierarchicalBeanFactory extends BeanFactory {
035
036        /**
037         * Return the parent bean factory, or {@code null} if there is none.
038         */
039        @Nullable
040        BeanFactory getParentBeanFactory();
041
042        /**
043         * Return whether the local bean factory contains a bean of the given name,
044         * ignoring beans defined in ancestor contexts.
045         * <p>This is an alternative to {@code containsBean}, ignoring a bean
046         * of the given name from an ancestor bean factory.
047         * @param name the name of the bean to query
048         * @return whether a bean with the given name is defined in the local factory
049         * @see BeanFactory#containsBean
050         */
051        boolean containsLocalBean(String name);
052
053}