001/* 002 * Copyright 2002-2017 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.lang.Nullable; 020import org.springframework.util.Assert; 021import org.springframework.util.ObjectUtils; 022 023/** 024 * Holder for a key-value style attribute that is part of a bean definition. 025 * Keeps track of the definition source in addition to the key-value pair. 026 * 027 * @author Juergen Hoeller 028 * @since 2.5 029 */ 030public class BeanMetadataAttribute implements BeanMetadataElement { 031 032 private final String name; 033 034 @Nullable 035 private final Object value; 036 037 @Nullable 038 private Object source; 039 040 041 /** 042 * Create a new AttributeValue instance. 043 * @param name the name of the attribute (never {@code null}) 044 * @param value the value of the attribute (possibly before type conversion) 045 */ 046 public BeanMetadataAttribute(String name, @Nullable Object value) { 047 Assert.notNull(name, "Name must not be null"); 048 this.name = name; 049 this.value = value; 050 } 051 052 053 /** 054 * Return the name of the attribute. 055 */ 056 public String getName() { 057 return this.name; 058 } 059 060 /** 061 * Return the value of the attribute. 062 */ 063 @Nullable 064 public Object getValue() { 065 return this.value; 066 } 067 068 /** 069 * Set the configuration source {@code Object} for this metadata element. 070 * <p>The exact type of the object will depend on the configuration mechanism used. 071 */ 072 public void setSource(@Nullable Object source) { 073 this.source = source; 074 } 075 076 @Override 077 @Nullable 078 public Object getSource() { 079 return this.source; 080 } 081 082 083 @Override 084 public boolean equals(@Nullable Object other) { 085 if (this == other) { 086 return true; 087 } 088 if (!(other instanceof BeanMetadataAttribute)) { 089 return false; 090 } 091 BeanMetadataAttribute otherMa = (BeanMetadataAttribute) other; 092 return (this.name.equals(otherMa.name) && 093 ObjectUtils.nullSafeEquals(this.value, otherMa.value) && 094 ObjectUtils.nullSafeEquals(this.source, otherMa.source)); 095 } 096 097 @Override 098 public int hashCode() { 099 return this.name.hashCode() * 29 + ObjectUtils.nullSafeHashCode(this.value); 100 } 101 102 @Override 103 public String toString() { 104 return "metadata attribute '" + this.name + "'"; 105 } 106 107}