mybatis语句的存储

sqlSession --|》configuration --|》 MappedStatement --|》 SqlSource --|》BoundSql

XMLStatementBuilder 解析xml，解析qlSource等属性，生成MappedStatement

SqlSource sqlSource = langDriver.createSqlSource(configuration, context, parameterTypeClass);
根据xml解析，生成SqlSource

String resultSets = context.getStringAttribute("resultSets"); // context 是一个XNode ，就是一个类似这种
String keyProperty = context.getStringAttribute("keyProperty");
String keyColumn = context.getStringAttribute("keyColumn");
获取解析的resultSets、keyProperty、eyColumn

builderAssistant.addMappedStatement(id, sqlSource, statementType, sqlCommandType,
fetchSize, timeout, parameterMap, parameterTypeClass, resultMap, resultTypeClass,
resultSetTypeEnum, flushCache, useCache, resultOrdered,
keyGenerator, keyProperty, keyColumn, databaseId, langDriver, resultSets);
把解析的这些属性，通过MapperBuilderAssistant添加一个MappedStatement到configuration中。

MapperBuilderAssistant

public MappedStatement addMappedStatement(
String id,
SqlSource sqlSource,
StatementType statementType,
SqlCommandType sqlCommandType,
Integer fetchSize,
Integer timeout,
String parameterMap,
Class parameterType, String resultMap, Class resultType,
ResultSetType resultSetType,
boolean flushCache,
boolean useCache,
boolean resultOrdered,
KeyGenerator keyGenerator,
String keyProperty,
String keyColumn,
String databaseId,
LanguageDriver lang,
String resultSets) {...}
把MappedStatement添加到configuration中。在XMLScriptBuilder的parseScriptNode()中调用了addMappedStatement这个方法

MappedStatement.Builder statementBuilder = new MappedStatement.Builder(configuration, id, sqlSource, sqlCommandType);
生成MappedStatement.Builder，传入了sqlSource。

MappedStatement statement = statementBuilder.build();
构造MappedStatement

configuration.addMappedStatement(statement);
添加到configuration

XMLLanguageDriver 创建SqlSource的工厂。

public SqlSource createSqlSource(Configuration configuration, XNode script, Class<?> parameterType) {...}
XMLScriptBuilder builder = new XMLScriptBuilder(configuration, script, parameterType);
return builder.parseScriptNode();

XMLScriptBuilder

public XMLScriptBuilder(Configuration configuration, XNode context, Class<?> parameterType) {...}
构造函数，传入XNode进去给它们解析

public SqlSource parseScriptNode() {...}
解析XNode生成SqlSource
List contents = parseDynamicTags(context);
解析XNode，获取当前XNode的所有SqlNode
MixedSqlNode rootSqlNode = new MixedSqlNode(contents);
sqlSource = new DynamicSqlSource(configuration, rootSqlNode);
return sqlSource;

private List parseDynamicTags(XNode node){...}

NodeHandler handler = nodeHandlers.get(nodeName);
handler.handleNode(child, contents);
根据nodeName获取相应类型的NodeHandler，去解析生成SQLNode // SQLNode是 trim、if、where 这些

StaticSqlSource SqlSource是一个工厂，用于生产BoundSql

public BoundSql getBoundSql(Object parameterObject) {...}
return new BoundSql(configuration, sql, parameterMappings, parameterObject);