下面列出了org.apache.ibatis.annotations.Options#org.apache.ibatis.executor.keygen.NoKeyGenerator 实例代码,或者点击链接到github查看源代码,也可以在右侧发表评论。
public Builder(Configuration configuration, String id, SqlSource sqlSource, SqlCommandType sqlCommandType) {
mappedStatement.configuration = configuration;
mappedStatement.id = id;
mappedStatement.sqlSource = sqlSource;
mappedStatement.statementType = StatementType.PREPARED;
mappedStatement.parameterMap = new ParameterMap.Builder(configuration, "defaultParameterMap", null, new ArrayList<ParameterMapping>()).build();
mappedStatement.resultMaps = new ArrayList<ResultMap>();
mappedStatement.timeout = configuration.getDefaultStatementTimeout();
mappedStatement.sqlCommandType = sqlCommandType;
mappedStatement.keyGenerator = configuration.isUseGeneratedKeys() && SqlCommandType.INSERT.equals(sqlCommandType) ? new Jdbc3KeyGenerator() : new NoKeyGenerator();
String logId = id;
if (configuration.getLogPrefix() != null) {
logId = configuration.getLogPrefix() + id;
}
mappedStatement.statementLog = LogFactory.getLog(logId);
mappedStatement.lang = configuration.getDefaultScriptingLanuageInstance();
}
public Builder(Configuration configuration, String id, SqlSource sqlSource, SqlCommandType sqlCommandType) {
mappedStatement.configuration = configuration;
mappedStatement.id = id;
mappedStatement.sqlSource = sqlSource;
mappedStatement.statementType = StatementType.PREPARED;
mappedStatement.parameterMap = new ParameterMap.Builder(configuration, "defaultParameterMap", null, new ArrayList<ParameterMapping>()).build();
mappedStatement.resultMaps = new ArrayList<ResultMap>();
mappedStatement.timeout = configuration.getDefaultStatementTimeout();
mappedStatement.sqlCommandType = sqlCommandType;
mappedStatement.keyGenerator = configuration.isUseGeneratedKeys() && SqlCommandType.INSERT.equals(sqlCommandType) ? new Jdbc3KeyGenerator() : new NoKeyGenerator();
String logId = id;
if (configuration.getLogPrefix() != null) {
logId = configuration.getLogPrefix() + id;
}
mappedStatement.statementLog = LogFactory.getLog(logId);
mappedStatement.lang = configuration.getDefaultScriptingLanuageInstance();
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod selectOne = SqlMethod.SELECT_ONE;
String sqlScript = String.format(selectOne.getSql(), tableInfo.getSelectColumnSegments(true),
tableInfo.getTableName(), getWrapperScript());
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, selectOne.getMethod(), sqlSource, SqlCommandType.SELECT, String.class, null, modelClass, new NoKeyGenerator(), tableInfo.getKeyProperty(), tableInfo.getKeyColumn());
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod deleteById = SqlMethod.DELETE_BY_ID;
String sqlScript = String.format(deleteById.getSql(), tableInfo.getTableName(), tableInfo.getKeyColumn(), "#{id}");
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, deleteById.getMethod(), sqlSource, SqlCommandType.DELETE, String.class, null, Integer.class, new NoKeyGenerator(), tableInfo.getKeyProperty(), tableInfo.getKeyColumn());
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod delete = SqlMethod.DELETE;
String sqlScript = String.format(delete.getSql(), tableInfo.getTableName(), getWrapperScript());
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, delete.getMethod(), sqlSource, SqlCommandType.DELETE, String.class, null, Integer.class, new NoKeyGenerator(), tableInfo.getKeyProperty(), tableInfo.getKeyColumn());
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod insert = SqlMethod.INSERT;
String sqlScript = String.format(insert.getSql(), tableInfo.getTableName(), tableInfo.getInsertColumnSegments(), tableInfo.getInsertValueSegments());
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, insert.getMethod(), sqlSource, SqlCommandType.INSERT, String.class, null, Integer.class, new NoKeyGenerator(), tableInfo.getKeyProperty(), tableInfo.getKeyColumn());
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod selectList = SqlMethod.SELECT_LIST;
String sqlScript = String.format(selectList.getSql(), tableInfo.getSelectColumnSegments(true),
tableInfo.getTableName(), getWrapperScript());
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, selectList.getMethod(), sqlSource, SqlCommandType.SELECT, String.class, null, modelClass, new NoKeyGenerator(), null, tableInfo.getKeyColumn());
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod update = SqlMethod.UPDATE;
String sqlScript = String.format(update.getSql(), tableInfo.getTableName(), tableInfo.getSetSegments(), getWrapperScript());
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, update.getMethod(), sqlSource, SqlCommandType.UPDATE, String.class, null, Integer.class, new NoKeyGenerator(), tableInfo.getKeyProperty(), tableInfo.getKeyColumn());
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod updateById = SqlMethod.UPDATE_BY_ID;
String sqlScript = String.format(updateById.getSql(), tableInfo.getTableName(), tableInfo.getSetSegments(),
tableInfo.getKeyColumn(), tableInfo.getKeyPropertySegment());
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, updateById.getMethod(), sqlSource, SqlCommandType.UPDATE, String.class, null, Integer.class, new NoKeyGenerator(), tableInfo.getKeyProperty(), tableInfo.getKeyColumn());
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod selectById = SqlMethod.SELECT_BY_ID;
String sqlScript = String.format(selectById.getSql(), tableInfo.getSelectColumnSegments(false),
tableInfo.getTableName(), tableInfo.getKeyColumn(), "#{id}");
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, selectById.getMethod(), sqlSource, SqlCommandType.SELECT, null, null, modelClass, new NoKeyGenerator(), tableInfo.getKeyProperty(), tableInfo.getKeyColumn());
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod deleteBatchByIds = SqlMethod.DELETE_BATCH_BY_IDS;
String sqlScript = String.format(deleteBatchByIds.getSql(), tableInfo.getTableName(), tableInfo.getKeyColumn(), getIdsScript());
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, deleteBatchByIds.getMethod(), sqlSource, SqlCommandType.DELETE, String.class, null, Integer.class, new NoKeyGenerator(), tableInfo.getKeyProperty(), tableInfo.getKeyColumn());
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod selectBatchByIds = SqlMethod.SELECT_BATCH_BY_IDS;
String sqlScript = String.format(selectBatchByIds.getSql(), tableInfo.getSelectColumnSegments(false),
tableInfo.getTableName(), tableInfo.getKeyColumn(), getIdsScript());
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, selectBatchByIds.getMethod(), sqlSource, SqlCommandType.SELECT, String.class, null, modelClass, new NoKeyGenerator(), null, tableInfo.getKeyColumn());
}
@Override
public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
SqlMethod selectCount = SqlMethod.SELECT_COUNT;
String sqlScript = String.format(selectCount.getSql(), tableInfo.getTableName(), getNormalSqlSegment());
SqlSource sqlSource = this.languageDriver.createSqlSource(this.configuration, sqlScript, modelClass);
return this.addMappedStatement(mapperClass, selectCount.getMethod(), sqlSource, SqlCommandType.SELECT, String.class, null, Integer.class, new NoKeyGenerator(), null, tableInfo.getKeyColumn());
}
/**
* @param configuration
* @param entity
*/
public static void build(Configuration configuration, LanguageDriver languageDriver, EntityInfo entity) {
String[] names = GeneralSqlGenerator.methodDefines.insertName().split(",");
for (String name : names) {
String msId = entity.getMapperClass().getName() + "." + name;
// 从参数对象里提取注解信息
EntityMapper entityMapper = EntityHelper.getEntityMapper(entity.getEntityClass());
// 生成sql
String sql = buildInsertSql(entityMapper, name.endsWith("Selective"));
SqlSource sqlSource = languageDriver.createSqlSource(configuration, sql, entity.getEntityClass());
MappedStatement.Builder statementBuilder = new MappedStatement.Builder(configuration, msId, sqlSource, SqlCommandType.INSERT);
KeyGenerator keyGenerator = entityMapper.autoId() ? new Jdbc3KeyGenerator() : new NoKeyGenerator();
statementBuilder.keyGenerator(keyGenerator)//
.keyProperty(entityMapper.getIdColumn().getProperty())//
.keyColumn(entityMapper.getIdColumn().getColumn());
MappedStatement statement = statementBuilder.build();
configuration.addMappedStatement(statement);
}
}
public void build(Configuration configuration, LanguageDriver languageDriver,EntityInfo entity) {
for (String name : methodNames()) {
String msId = entity.getMapperClass().getName() + "." + name;
// 从参数对象里提取注解信息
EntityMapper entityMapper = EntityHelper.getEntityMapper(entity.getEntityClass());
// 生成sql
String sql = buildSQL(entityMapper,name.endsWith("Selective"));
SqlSource sqlSource = languageDriver.createSqlSource(configuration, sql, entity.getEntityClass());
MappedStatement.Builder statementBuilder = new MappedStatement.Builder(configuration, msId, sqlSource,sqlCommandType());
//主键策略
if(sqlCommandType() == SqlCommandType.INSERT){
KeyGenerator keyGenerator = entityMapper.autoId() ? new Jdbc3KeyGenerator() : new NoKeyGenerator();
statementBuilder.keyGenerator(keyGenerator)//
.keyProperty(entityMapper.getIdColumn().getProperty())//
.keyColumn(entityMapper.getIdColumn().getColumn());
}
MappedStatement statement = statementBuilder.build();
//
setResultType(configuration, statement, entity.getEntityClass());
configuration.addMappedStatement(statement);
}
}
private KeyGenerator handleSelectKeyAnnotation(SelectKey selectKeyAnnotation, String baseStatementId, Class<?> parameterTypeClass, LanguageDriver languageDriver) {
String id = baseStatementId + SelectKeyGenerator.SELECT_KEY_SUFFIX;
Class<?> resultTypeClass = selectKeyAnnotation.resultType();
StatementType statementType = selectKeyAnnotation.statementType();
String keyProperty = selectKeyAnnotation.keyProperty();
String keyColumn = selectKeyAnnotation.keyColumn();
boolean executeBefore = selectKeyAnnotation.before();
// defaults
boolean useCache = false;
KeyGenerator keyGenerator = new NoKeyGenerator();
Integer fetchSize = null;
Integer timeout = null;
boolean flushCache = false;
String parameterMap = null;
String resultMap = null;
ResultSetType resultSetTypeEnum = null;
SqlSource sqlSource = buildSqlSourceFromStrings(selectKeyAnnotation.statement(), parameterTypeClass, languageDriver);
SqlCommandType sqlCommandType = SqlCommandType.SELECT;
assistant.addMappedStatement(id, sqlSource, statementType, sqlCommandType, fetchSize, timeout, parameterMap, parameterTypeClass, resultMap, resultTypeClass, resultSetTypeEnum,
flushCache, useCache, false,
keyGenerator, keyProperty, keyColumn, null, languageDriver, null);
id = assistant.applyCurrentNamespace(id, false);
MappedStatement keyStatement = configuration.getMappedStatement(id, false);
SelectKeyGenerator answer = new SelectKeyGenerator(keyStatement, executeBefore);
configuration.addKeyGenerator(id, answer);
return answer;
}
private void parseSelectKeyNode(String id, XNode nodeToHandle, Class<?> parameterTypeClass, LanguageDriver langDriver, String databaseId) {
String resultType = nodeToHandle.getStringAttribute("resultType");
Class<?> resultTypeClass = resolveClass(resultType);
StatementType statementType = StatementType.valueOf(nodeToHandle.getStringAttribute("statementType", StatementType.PREPARED.toString()));
String keyProperty = nodeToHandle.getStringAttribute("keyProperty");
String keyColumn = nodeToHandle.getStringAttribute("keyColumn");
boolean executeBefore = "BEFORE".equals(nodeToHandle.getStringAttribute("order", "AFTER"));
//defaults
boolean useCache = false;
boolean resultOrdered = false;
KeyGenerator keyGenerator = new NoKeyGenerator();
Integer fetchSize = null;
Integer timeout = null;
boolean flushCache = false;
String parameterMap = null;
String resultMap = null;
ResultSetType resultSetTypeEnum = null;
SqlSource sqlSource = langDriver.createSqlSource(configuration, nodeToHandle, parameterTypeClass);
SqlCommandType sqlCommandType = SqlCommandType.SELECT;
builderAssistant.addMappedStatement(id, sqlSource, statementType, sqlCommandType,
fetchSize, timeout, parameterMap, parameterTypeClass, resultMap, resultTypeClass,
resultSetTypeEnum, flushCache, useCache, resultOrdered,
keyGenerator, keyProperty, keyColumn, databaseId, langDriver, null);
id = builderAssistant.applyCurrentNamespace(id, false);
MappedStatement keyStatement = configuration.getMappedStatement(id, false);
configuration.addKeyGenerator(id, new SelectKeyGenerator(keyStatement, executeBefore));
}
private KeyGenerator handleSelectKeyAnnotation(SelectKey selectKeyAnnotation, String baseStatementId, Class<?> parameterTypeClass, LanguageDriver languageDriver) {
String id = baseStatementId + SelectKeyGenerator.SELECT_KEY_SUFFIX;
Class<?> resultTypeClass = selectKeyAnnotation.resultType();
StatementType statementType = selectKeyAnnotation.statementType();
String keyProperty = selectKeyAnnotation.keyProperty();
String keyColumn = selectKeyAnnotation.keyColumn();
boolean executeBefore = selectKeyAnnotation.before();
// defaults
boolean useCache = false;
KeyGenerator keyGenerator = new NoKeyGenerator();
Integer fetchSize = null;
Integer timeout = null;
boolean flushCache = false;
String parameterMap = null;
String resultMap = null;
ResultSetType resultSetTypeEnum = null;
SqlSource sqlSource = buildSqlSourceFromStrings(selectKeyAnnotation.statement(), parameterTypeClass, languageDriver);
SqlCommandType sqlCommandType = SqlCommandType.SELECT;
assistant.addMappedStatement(id, sqlSource, statementType, sqlCommandType, fetchSize, timeout, parameterMap, parameterTypeClass, resultMap, resultTypeClass, resultSetTypeEnum,
flushCache, useCache, false,
keyGenerator, keyProperty, keyColumn, null, languageDriver, null);
id = assistant.applyCurrentNamespace(id, false);
MappedStatement keyStatement = configuration.getMappedStatement(id, false);
SelectKeyGenerator answer = new SelectKeyGenerator(keyStatement, executeBefore);
configuration.addKeyGenerator(id, answer);
return answer;
}
private void parseSelectKeyNode(String id, XNode nodeToHandle, Class<?> parameterTypeClass, LanguageDriver langDriver, String databaseId) {
String resultType = nodeToHandle.getStringAttribute("resultType");
Class<?> resultTypeClass = resolveClass(resultType);
StatementType statementType = StatementType.valueOf(nodeToHandle.getStringAttribute("statementType", StatementType.PREPARED.toString()));
String keyProperty = nodeToHandle.getStringAttribute("keyProperty");
String keyColumn = nodeToHandle.getStringAttribute("keyColumn");
boolean executeBefore = "BEFORE".equals(nodeToHandle.getStringAttribute("order", "AFTER"));
//defaults
boolean useCache = false;
boolean resultOrdered = false;
KeyGenerator keyGenerator = new NoKeyGenerator();
Integer fetchSize = null;
Integer timeout = null;
boolean flushCache = false;
String parameterMap = null;
String resultMap = null;
ResultSetType resultSetTypeEnum = null;
SqlSource sqlSource = langDriver.createSqlSource(configuration, nodeToHandle, parameterTypeClass);
SqlCommandType sqlCommandType = SqlCommandType.SELECT;
builderAssistant.addMappedStatement(id, sqlSource, statementType, sqlCommandType,
fetchSize, timeout, parameterMap, parameterTypeClass, resultMap, resultTypeClass,
resultSetTypeEnum, flushCache, useCache, resultOrdered,
keyGenerator, keyProperty, keyColumn, databaseId, langDriver, null);
id = builderAssistant.applyCurrentNamespace(id, false);
MappedStatement keyStatement = configuration.getMappedStatement(id, false);
configuration.addKeyGenerator(id, new SelectKeyGenerator(keyStatement, executeBefore));
}
protected void addMappedStatement(String id, String[] sqls,
SqlCommandType sqlCommandType) {
addMappedStatement(id, sqls, sqlCommandType, null, null, null,
NoKeyGenerator.INSTANCE, null, null);
}
protected void addMappedStatement(String id, String[] sqls,
SqlCommandType sqlCommandType, Class<?> parameterType) {
addMappedStatement(id, sqls, sqlCommandType, parameterType, null, null,
NoKeyGenerator.INSTANCE, null, null);
}
protected void addMappedStatement(String id, String[] sqls,
SqlCommandType sqlCommandType, Class<?> parameterType, Class<?> resultType) {
addMappedStatement(id, sqls, sqlCommandType, parameterType, null, resultType,
NoKeyGenerator.INSTANCE, null, null);
}
protected void addMappedStatement(String id, String[] sqls,
SqlCommandType sqlCommandType, Class<?> parameterType, String resultMap) {
addMappedStatement(id, sqls, sqlCommandType, parameterType, resultMap, null,
NoKeyGenerator.INSTANCE, null, null);
}
public void parseStatementNode() {
String id = context.getStringAttribute("id");
String databaseId = context.getStringAttribute("databaseId");
//如果databaseId不匹配,退出
if (!databaseIdMatchesCurrent(id, databaseId, this.requiredDatabaseId)) {
return;
}
//暗示驱动程序每次批量返回的结果行数
Integer fetchSize = context.getIntAttribute("fetchSize");
//超时时间
Integer timeout = context.getIntAttribute("timeout");
//引用外部 parameterMap,已废弃
String parameterMap = context.getStringAttribute("parameterMap");
//参数类型
String parameterType = context.getStringAttribute("parameterType");
Class<?> parameterTypeClass = resolveClass(parameterType);
//引用外部的 resultMap(高级功能)
String resultMap = context.getStringAttribute("resultMap");
//结果类型
String resultType = context.getStringAttribute("resultType");
//脚本语言,mybatis3.2的新功能
String lang = context.getStringAttribute("lang");
//得到语言驱动
LanguageDriver langDriver = getLanguageDriver(lang);
Class<?> resultTypeClass = resolveClass(resultType);
//结果集类型,FORWARD_ONLY|SCROLL_SENSITIVE|SCROLL_INSENSITIVE 中的一种
String resultSetType = context.getStringAttribute("resultSetType");
//语句类型, STATEMENT|PREPARED|CALLABLE 的一种
StatementType statementType = StatementType.valueOf(context.getStringAttribute("statementType", StatementType.PREPARED.toString()));
ResultSetType resultSetTypeEnum = resolveResultSetType(resultSetType);
//获取命令类型(select|insert|update|delete)
String nodeName = context.getNode().getNodeName();
SqlCommandType sqlCommandType = SqlCommandType.valueOf(nodeName.toUpperCase(Locale.ENGLISH));
boolean isSelect = sqlCommandType == SqlCommandType.SELECT;
boolean flushCache = context.getBooleanAttribute("flushCache", !isSelect);
//是否要缓存select结果
boolean useCache = context.getBooleanAttribute("useCache", isSelect);
//仅针对嵌套结果 select 语句适用:如果为 true,就是假设包含了嵌套结果集或是分组了,这样的话当返回一个主结果行的时候,就不会发生有对前面结果集的引用的情况。
//这就使得在获取嵌套的结果集的时候不至于导致内存不够用。默认值:false。
boolean resultOrdered = context.getBooleanAttribute("resultOrdered", false);
// Include Fragments before parsing
//解析之前先解析<include>SQL片段
XMLIncludeTransformer includeParser = new XMLIncludeTransformer(configuration, builderAssistant);
includeParser.applyIncludes(context.getNode());
// Parse selectKey after includes and remove them.
//解析之前先解析<selectKey>
processSelectKeyNodes(id, parameterTypeClass, langDriver);
// Parse the SQL (pre: <selectKey> and <include> were parsed and removed)
//解析成SqlSource,一般是DynamicSqlSource
SqlSource sqlSource = langDriver.createSqlSource(configuration, context, parameterTypeClass);
String resultSets = context.getStringAttribute("resultSets");
//(仅对 insert 有用) 标记一个属性, MyBatis 会通过 getGeneratedKeys 或者通过 insert 语句的 selectKey 子元素设置它的值
String keyProperty = context.getStringAttribute("keyProperty");
//(仅对 insert 有用) 标记一个属性, MyBatis 会通过 getGeneratedKeys 或者通过 insert 语句的 selectKey 子元素设置它的值
String keyColumn = context.getStringAttribute("keyColumn");
KeyGenerator keyGenerator;
String keyStatementId = id + SelectKeyGenerator.SELECT_KEY_SUFFIX;
keyStatementId = builderAssistant.applyCurrentNamespace(keyStatementId, true);
if (configuration.hasKeyGenerator(keyStatementId)) {
keyGenerator = configuration.getKeyGenerator(keyStatementId);
} else {
keyGenerator = context.getBooleanAttribute("useGeneratedKeys",
configuration.isUseGeneratedKeys() && SqlCommandType.INSERT.equals(sqlCommandType))
? new Jdbc3KeyGenerator() : new NoKeyGenerator();
}
//又去调助手类
builderAssistant.addMappedStatement(id, sqlSource, statementType, sqlCommandType,
fetchSize, timeout, parameterMap, parameterTypeClass, resultMap, resultTypeClass,
resultSetTypeEnum, flushCache, useCache, resultOrdered,
keyGenerator, keyProperty, keyColumn, databaseId, langDriver, resultSets);
}
public void parseStatementNode() {
String id = context.getStringAttribute("id");
String databaseId = context.getStringAttribute("databaseId");
//如果databaseId不匹配,退出
if (!databaseIdMatchesCurrent(id, databaseId, this.requiredDatabaseId)) {
return;
}
//暗示驱动程序每次批量返回的结果行数
Integer fetchSize = context.getIntAttribute("fetchSize");
//超时时间
Integer timeout = context.getIntAttribute("timeout");
//引用外部 parameterMap,已废弃
String parameterMap = context.getStringAttribute("parameterMap");
//参数类型
String parameterType = context.getStringAttribute("parameterType");
Class<?> parameterTypeClass = resolveClass(parameterType);
//引用外部的 resultMap(高级功能)
String resultMap = context.getStringAttribute("resultMap");
//结果类型
String resultType = context.getStringAttribute("resultType");
//脚本语言,mybatis3.2的新功能
String lang = context.getStringAttribute("lang");
//得到语言驱动
LanguageDriver langDriver = getLanguageDriver(lang);
Class<?> resultTypeClass = resolveClass(resultType);
//结果集类型,FORWARD_ONLY|SCROLL_SENSITIVE|SCROLL_INSENSITIVE 中的一种
String resultSetType = context.getStringAttribute("resultSetType");
//语句类型, STATEMENT|PREPARED|CALLABLE 的一种
StatementType statementType = StatementType.valueOf(context.getStringAttribute("statementType", StatementType.PREPARED.toString()));
ResultSetType resultSetTypeEnum = resolveResultSetType(resultSetType);
//获取命令类型(select|insert|update|delete)
String nodeName = context.getNode().getNodeName();
SqlCommandType sqlCommandType = SqlCommandType.valueOf(nodeName.toUpperCase(Locale.ENGLISH));
boolean isSelect = sqlCommandType == SqlCommandType.SELECT;
boolean flushCache = context.getBooleanAttribute("flushCache", !isSelect);
//是否要缓存select结果
boolean useCache = context.getBooleanAttribute("useCache", isSelect);
//仅针对嵌套结果 select 语句适用:如果为 true,就是假设包含了嵌套结果集或是分组了,这样的话当返回一个主结果行的时候,就不会发生有对前面结果集的引用的情况。
//这就使得在获取嵌套的结果集的时候不至于导致内存不够用。默认值:false。
boolean resultOrdered = context.getBooleanAttribute("resultOrdered", false);
// Include Fragments before parsing
//解析之前先解析<include>SQL片段
XMLIncludeTransformer includeParser = new XMLIncludeTransformer(configuration, builderAssistant);
includeParser.applyIncludes(context.getNode());
// Parse selectKey after includes and remove them.
//解析之前先解析<selectKey>
processSelectKeyNodes(id, parameterTypeClass, langDriver);
// Parse the SQL (pre: <selectKey> and <include> were parsed and removed)
//解析成SqlSource,一般是DynamicSqlSource
SqlSource sqlSource = langDriver.createSqlSource(configuration, context, parameterTypeClass);
String resultSets = context.getStringAttribute("resultSets");
//(仅对 insert 有用) 标记一个属性, MyBatis 会通过 getGeneratedKeys 或者通过 insert 语句的 selectKey 子元素设置它的值
String keyProperty = context.getStringAttribute("keyProperty");
//(仅对 insert 有用) 标记一个属性, MyBatis 会通过 getGeneratedKeys 或者通过 insert 语句的 selectKey 子元素设置它的值
String keyColumn = context.getStringAttribute("keyColumn");
KeyGenerator keyGenerator;
String keyStatementId = id + SelectKeyGenerator.SELECT_KEY_SUFFIX;
keyStatementId = builderAssistant.applyCurrentNamespace(keyStatementId, true);
if (configuration.hasKeyGenerator(keyStatementId)) {
keyGenerator = configuration.getKeyGenerator(keyStatementId);
} else {
keyGenerator = context.getBooleanAttribute("useGeneratedKeys",
configuration.isUseGeneratedKeys() && SqlCommandType.INSERT.equals(sqlCommandType))
? new Jdbc3KeyGenerator() : new NoKeyGenerator();
}
//又去调助手类
builderAssistant.addMappedStatement(id, sqlSource, statementType, sqlCommandType,
fetchSize, timeout, parameterMap, parameterTypeClass, resultMap, resultTypeClass,
resultSetTypeEnum, flushCache, useCache, resultOrdered,
keyGenerator, keyProperty, keyColumn, databaseId, langDriver, resultSets);
}