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完善MappedStatement构建的参数映射流程注释 #13

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完善MappedStatement构建的参数映射流程注释 #13

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5 changes: 5 additions & 0 deletions src/main/java/org/apache/ibatis/builder/MapperBuilderAssistant.java
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Original file line number Diff line number Diff line change
Expand Up @@ -341,6 +341,7 @@ private void setStatementParameterMap(
String parameterMap,
Class<?> parameterTypeClass,
MappedStatement.Builder statementBuilder) {
// 给parameterMap加上namespace 但是因为parameterMap被弃用 所以一般返回null
parameterMap = applyCurrentNamespace(parameterMap, true);

if (parameterMap != null) {
Expand All @@ -350,12 +351,16 @@ private void setStatementParameterMap(
throw new IncompleteElementException("Could not find parameter map " + parameterMap, e);
}
} else if (parameterTypeClass != null) {
// 解析 parameterType生成的类对象
List<ParameterMapping> parameterMappings = new ArrayList<ParameterMapping>();
// 构造ParameterMap类内部的构建类
// 这里主要是 parameterTypeClass 的赋值 而parameterMapping仅作为一个空列表传入
ParameterMap.Builder inlineParameterMapBuilder = new ParameterMap.Builder(
configuration,
statementBuilder.id() + "-Inline",
parameterTypeClass,
parameterMappings);
// 通过内部构建类构建ParameterMap并传入配置对象中
statementBuilder.parameterMap(inlineParameterMapBuilder.build());
}
}
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4 changes: 2 additions & 2 deletions src/main/java/org/apache/ibatis/builder/xml/XMLStatementBuilder.java
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Expand Up @@ -123,7 +123,7 @@ public void parseStatementNode() {
includeParser.applyIncludes(context.getNode());

// Parse selectKey after includes and remove them.
//解析之前先解析<selectKey>
//解析之前先解析<selectKey> selectKey主要涉及需要某些特殊关系来设置主键的值
processSelectKeyNodes(id, parameterTypeClass, langDriver);

// Parse the SQL (pre: <selectKey> and <include> were parsed and removed)
Expand All @@ -145,7 +145,7 @@ public void parseStatementNode() {
? new Jdbc3KeyGenerator() : new NoKeyGenerator();
}

//又去调助手类
//调用助手类去真正创建MappedStatement然后加入配置Configuration中
builderAssistant.addMappedStatement(id, sqlSource, statementType, sqlCommandType,
fetchSize, timeout, parameterMap, parameterTypeClass, resultMap, resultTypeClass,
resultSetTypeEnum, flushCache, useCache, resultOrdered,
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1 change: 1 addition & 0 deletions src/main/java/org/apache/ibatis/mapping/ParameterMap.java
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Expand Up @@ -35,6 +35,7 @@ private ParameterMap() {
public static class Builder {
private ParameterMap parameterMap = new ParameterMap();

// 在构建者内部再持有ParameterMap对象并执行一系列赋值构建操作
public Builder(Configuration configuration, String id, Class<?> type, List<ParameterMapping> parameterMappings) {
parameterMap.id = id;
parameterMap.type = type;
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