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;
018
019import org.springframework.core.AttributeAccessorSupport;
020
021/**
022 * Extension of {@link org.springframework.core.AttributeAccessorSupport},
023 * holding attributes as {@link BeanMetadataAttribute} objects in order
024 * to keep track of the definition source.
025 *
026 * @author Juergen Hoeller
027 * @since 2.5
028 */
029@SuppressWarnings("serial")
030public class BeanMetadataAttributeAccessor extends AttributeAccessorSupport implements BeanMetadataElement {
031
032        private Object source;
033
034
035        /**
036         * Set the configuration source {@code Object} for this metadata element.
037         * <p>The exact type of the object will depend on the configuration mechanism used.
038         */
039        public void setSource(Object source) {
040                this.source = source;
041        }
042
043        @Override
044        public Object getSource() {
045                return this.source;
046        }
047
048
049        /**
050         * Add the given BeanMetadataAttribute to this accessor's set of attributes.
051         * @param attribute the BeanMetadataAttribute object to register
052         */
053        public void addMetadataAttribute(BeanMetadataAttribute attribute) {
054                super.setAttribute(attribute.getName(), attribute);
055        }
056
057        /**
058         * Look up the given BeanMetadataAttribute in this accessor's set of attributes.
059         * @param name the name of the attribute
060         * @return the corresponding BeanMetadataAttribute object,
061         * or {@code null} if no such attribute defined
062         */
063        public BeanMetadataAttribute getMetadataAttribute(String name) {
064                return (BeanMetadataAttribute) super.getAttribute(name);
065        }
066
067        @Override
068        public void setAttribute(String name, Object value) {
069                super.setAttribute(name, new BeanMetadataAttribute(name, value));
070        }
071
072        @Override
073        public Object getAttribute(String name) {
074                BeanMetadataAttribute attribute = (BeanMetadataAttribute) super.getAttribute(name);
075                return (attribute != null ? attribute.getValue() : null);
076        }
077
078        @Override
079        public Object removeAttribute(String name) {
080                BeanMetadataAttribute attribute = (BeanMetadataAttribute) super.removeAttribute(name);
081                return (attribute != null ? attribute.getValue() : null);
082        }
083
084}