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@ -1,18 +1,17 @@
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# Spring BeanDefinitionParserDelegate
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- Author: [HuiFer](https://github.com/huifer)
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- 源码阅读仓库: [SourceHot-spring](https://github.com/SourceHot/spring-framework-read)
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- 全路径`org.springframework.beans.factory.xml.BeanDefinitionParserDelegate`
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- 解析 xml 中标签的委托类
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- 在这个类中定义常量如下，为后续解析提供帮助
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```java
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public static final String BEANS_NAMESPACE_URI = "http://www.springframework.org/schema/beans";
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public static final String MULTI_VALUE_ATTRIBUTE_DELIMITERS = ",; ";
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public static final String MULTI_VALUE_ATTRIBUTE_DELIMITERS = ",; ";
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public static final String TRUE_VALUE = "true";
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@ -147,18 +146,10 @@
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private static final String SINGLETON_ATTRIBUTE = "singleton";
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```
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## populateDefaults
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#populateDefaults`方法解析属性赋值给`DocumentDefaultsDefinition`对象
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- 代码逻辑如下
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1. 读取属性
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2. 判断是否默认值
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@ -215,8 +206,6 @@ protected void populateDefaults(DocumentDefaultsDefinition defaults, @Nullable D
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}
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```
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### DocumentDefaultsDefinition
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- 全路径:`org.springframework.beans.factory.xml.DocumentDefaultsDefinition`
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@ -266,12 +255,6 @@ public class DocumentDefaultsDefinition implements DefaultsDefinition {
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}
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```
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## checkNameUniqueness
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#checkNameUniqueness`
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@ -309,17 +292,13 @@ protected void checkNameUniqueness(String beanName, List<String> aliases, Elemen
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}
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```
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## createBeanDefinition
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- `org.springframework.beans.factory.support.BeanDefinitionReaderUtils#createBeanDefinition`
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- 创建具有基本信息的**BeanDefinition**
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1. parent bean name
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1. parent bean name
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2. bean clsss
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3. bean class name
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3. bean class name
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```java
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public static AbstractBeanDefinition createBeanDefinition(
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@ -343,29 +322,15 @@ public static AbstractBeanDefinition createBeanDefinition(
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}
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```
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## parseBeanDefinitionElement
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseBeanDefinitionElement(org.w3c.dom.Element, org.springframework.beans.factory.config.BeanDefinition)`
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- 该方法用来解析 `<bean/>` 标签信息
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##
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##
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseBeanDefinitionElement(org.w3c.dom.Element, java.lang.String, org.springframework.beans.factory.config.BeanDefinition)`
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```java
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@Nullable
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public AbstractBeanDefinition parseBeanDefinitionElement(
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@ -432,12 +397,8 @@ public AbstractBeanDefinition parseBeanDefinitionElement(
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseBeanDefinitionAttributes`
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- 将 xml 标签的数据读取到内存中设置给`AbstractBeanDefinition`
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```JAVA
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public AbstractBeanDefinition parseBeanDefinitionAttributes(Element ele, String beanName,
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@Nullable BeanDefinition containingBean, AbstractBeanDefinition bd) {
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@ -539,17 +500,11 @@ public AbstractBeanDefinition parseBeanDefinitionAttributes(Element ele, String
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}
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```
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### parseMetaElements
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseMetaElements`
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- 设置元数据.
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- 设置元数据.
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标签`meta`的解析
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@ -578,8 +533,6 @@ public void parseMetaElements(Element ele, BeanMetadataAttributeAccessor attribu
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}
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```
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使用案例
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```xml
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@ -588,8 +541,6 @@ public void parseMetaElements(Element ele, BeanMetadataAttributeAccessor attribu
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</bean>
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```
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```java
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ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("META-INF/beans/spring-lookup-method.xml");
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@ -599,8 +550,6 @@ Object attribute = apple.getAttribute("meta-key");
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System.out.println(attribute);
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```
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### parseLookupOverrideSubElements
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseLookupOverrideSubElements`
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@ -609,8 +558,6 @@ System.out.println(attribute);
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`lookup-method`
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```java
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public void parseLookupOverrideSubElements(Element beanEle, MethodOverrides overrides) {
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// 获取子标签
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@ -634,8 +581,6 @@ public void parseLookupOverrideSubElements(Element beanEle, MethodOverrides over
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}
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```
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使用案例
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```xml
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@ -659,10 +604,6 @@ public class LookupMain {
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}
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```
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### parseReplacedMethodSubElements
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseReplacedMethodSubElements`
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@ -710,12 +651,8 @@ public void parseReplacedMethodSubElements(Element beanEle, MethodOverrides over
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}
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```
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- 使用案例
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```xml
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<?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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@ -735,8 +672,6 @@ public void parseReplacedMethodSubElements(Element beanEle, MethodOverrides over
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</beans>
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```
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```java
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public class MethodReplacerApple implements MethodReplacer {
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@Override
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@ -747,13 +682,7 @@ public class MethodReplacerApple implements MethodReplacer {
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}
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```
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**replacer需要使用MethodReplacer实现类**
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**replacer 需要使用 MethodReplacer 实现类**
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### parseConstructorArgElements
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@ -761,8 +690,6 @@ public class MethodReplacerApple implements MethodReplacer {
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- 解析`constructor-arg`标签
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```
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public void parseConstructorArgElements(Element beanEle, BeanDefinition bd) {
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// 获取
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@ -777,10 +704,6 @@ public void parseConstructorArgElements(Element beanEle, BeanDefinition bd) {
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}
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```
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```java
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public void parseConstructorArgElement(Element ele, BeanDefinition bd) {
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// 获取 index 属性
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@ -857,8 +780,6 @@ public void parseConstructorArgElement(Element ele, BeanDefinition bd) {
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}
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```
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### parseConstructorArgElement
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseConstructorArgElement`
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@ -928,10 +849,6 @@ public Object parsePropertyValue(Element ele, BeanDefinition bd, @Nullable Strin
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}
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```
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### parsePropertySubElement
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parsePropertySubElement(org.w3c.dom.Element, org.springframework.beans.factory.config.BeanDefinition)`
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@ -944,10 +861,6 @@ public Object parsePropertySubElement(Element ele, @Nullable BeanDefinition bd)
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}
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```
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### parsePropertySubElement
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parsePropertySubElement(org.w3c.dom.Element, org.springframework.beans.factory.config.BeanDefinition, java.lang.String)`
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@ -1028,13 +941,9 @@ public Object parsePropertySubElement(Element ele, @Nullable BeanDefinition bd,
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}
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```
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#### parseIdRefElement
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseIdRefElement`
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseIdRefElement`
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```java
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@Nullable
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@ -1058,14 +967,10 @@ public Object parseIdRefElement(Element ele) {
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}
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```
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#### parseValueElement
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseValueElement`
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```JAVA
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public Object parseValueElement(Element ele, @Nullable String defaultTypeName) {
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// It's a literal value.
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@ -1093,10 +998,6 @@ public Object parseIdRefElement(Element ele) {
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```
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##### buildTypedStringValue
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#buildTypedStringValue`
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@ -1105,7 +1006,7 @@ public Object parseIdRefElement(Element ele) {
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```java
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protected TypedStringValue buildTypedStringValue(String value, @Nullable String targetTypeName)
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throws ClassNotFoundException {
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// class loader
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// class loader
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ClassLoader classLoader = this.readerContext.getBeanClassLoader();
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TypedStringValue typedValue;
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if (!StringUtils.hasText(targetTypeName)) {
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@ -1144,8 +1045,6 @@ public Object parseArrayElement(Element arrayEle, @Nullable BeanDefinition bd) {
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}
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```
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#### parseListElement
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```java
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@ -1176,10 +1075,6 @@ public Set<Object> parseSetElement(Element collectionEle, @Nullable BeanDefiniti
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}
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```
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##### parseCollectionElements
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- `parseArrayElement`、`parseListElement`、`parseSetElement` 都围绕者下面这个方法进行数据合并
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@ -1198,8 +1093,6 @@ protected void parseCollectionElements(
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}
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```
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#### parseMapElement
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```java
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@ -1342,20 +1235,8 @@ public Map<Object, Object> parseMapElement(Element mapEle, @Nullable BeanDefinit
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}
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```
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#### parsePropsElement
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### parsePropertyElement
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parsePropertyElement`
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@ -1389,12 +1270,6 @@ public void parsePropertyElement(Element ele, BeanDefinition bd) {
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}
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```
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### parseQualifierElements
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseQualifierElements`
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@ -1413,10 +1288,6 @@ public void parseQualifierElements(Element beanEle, AbstractBeanDefinition bd) {
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}
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```
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### parseQualifierElement
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- `org.springframework.beans.factory.xml.BeanDefinitionParserDelegate#parseQualifierElement`
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@ -1470,4 +1341,4 @@ public void parseQualifierElement(Element ele, AbstractBeanDefinition bd) {
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this.parseState.pop();
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}
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}
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```
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```
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yanglbme
5 years ago
committed by
GitHub Action