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.config;
018
019import org.springframework.util.Assert;
020
021/**
022 * Immutable placeholder class used for a property value object when it's a
023 * reference to another bean name in the factory, to be resolved at runtime.
024 *
025 * @author Juergen Hoeller
026 * @since 2.0
027 * @see RuntimeBeanReference
028 * @see BeanDefinition#getPropertyValues()
029 * @see org.springframework.beans.factory.BeanFactory#getBean
030 */
031public class RuntimeBeanNameReference implements BeanReference {
032
033        private final String beanName;
034
035        private Object source;
036
037
038        /**
039         * Create a new RuntimeBeanNameReference to the given bean name.
040         * @param beanName name of the target bean
041         */
042        public RuntimeBeanNameReference(String beanName) {
043                Assert.hasText(beanName, "'beanName' must not be empty");
044                this.beanName = beanName;
045        }
046
047        @Override
048        public String getBeanName() {
049                return this.beanName;
050        }
051
052        /**
053         * Set the configuration source {@code Object} for this metadata element.
054         * <p>The exact type of the object will depend on the configuration mechanism used.
055         */
056        public void setSource(Object source) {
057                this.source = source;
058        }
059
060        @Override
061        public Object getSource() {
062                return this.source;
063        }
064
065
066        @Override
067        public boolean equals(Object other) {
068                if (this == other) {
069                        return true;
070                }
071                if (!(other instanceof RuntimeBeanNameReference)) {
072                        return false;
073                }
074                RuntimeBeanNameReference that = (RuntimeBeanNameReference) other;
075                return this.beanName.equals(that.beanName);
076        }
077
078        @Override
079        public int hashCode() {
080                return this.beanName.hashCode();
081        }
082
083        @Override
084        public String toString() {
085                return '<' + getBeanName() + '>';
086        }
087
088}