private boolean applyAutomaticMappings(
ResultSetWrapper rsw, ResultMap resultMap, MetaObject metaObject, String columnPrefix)
throws SQLException {
final List<String> unmappedColumnNames = rsw.getUnmappedColumnNames(resultMap, columnPrefix);
boolean foundValues = false;
for (String columnName : unmappedColumnNames) {
String propertyName = columnName;
if (columnPrefix != null && columnPrefix.length() > 0) {
// When columnPrefix is specified,
// ignore columns without the prefix.
if (columnName.toUpperCase(Locale.ENGLISH).startsWith(columnPrefix)) {
propertyName = columnName.substring(columnPrefix.length());
} else {
continue;
}
}
final String property =
metaObject.findProperty(propertyName, configuration.isMapUnderscoreToCamelCase());
if (property != null && metaObject.hasSetter(property)) {
final Class<?> propertyType = metaObject.getSetterType(property);
if (typeHandlerRegistry.hasTypeHandler(propertyType)) {
final TypeHandler<?> typeHandler = rsw.getTypeHandler(propertyType, columnName);
final Object value = typeHandler.getResult(rsw.getResultSet(), columnName);
if (value != null
|| configuration.isCallSettersOnNulls()) { // issue #377, call setter on nulls
if (value != null || !propertyType.isPrimitive()) {
metaObject.setValue(property, value);
}
foundValues = true;
}
}
}
}
return foundValues;
}
public SqlCommand(Configuration configuration, Class<?> mapperInterface, Method method) {
String statementName = mapperInterface.getName() + "." + method.getName();
MappedStatement ms = null;
if (configuration.hasStatement(statementName)) {
ms = configuration.getMappedStatement(statementName);
} else if (!mapperInterface.equals(method.getDeclaringClass())) { // issue #35
String parentStatementName = method.getDeclaringClass().getName() + "." + method.getName();
if (configuration.hasStatement(parentStatementName)) {
ms = configuration.getMappedStatement(parentStatementName);
}
}
if (ms == null) {
if (method.getAnnotation(Flush.class) != null) {
name = null;
type = SqlCommandType.FLUSH;
} else {
throw new BindingException("Invalid bound statement (not found): " + statementName);
}
} else {
name = ms.getId();
type = ms.getSqlCommandType();
if (type == SqlCommandType.UNKNOWN) {
throw new BindingException("Unknown execution method for: " + name);
}
}
}
private void processGeneratedKeys(Executor executor, MappedStatement ms, Object parameter) {
try {
if (parameter != null && keyStatement != null && keyStatement.getKeyProperties() != null) {
String keyProperty =
keyStatement.getKeyProperties()[0]; // just one key property is supported
final Configuration configuration = ms.getConfiguration();
final MetaObject metaParam = configuration.newMetaObject(parameter);
if (keyProperty != null && metaParam.hasSetter(keyProperty)) {
// Do not close keyExecutor.
// The transaction will be closed by parent executor.
Executor keyExecutor =
configuration.newExecutor(executor.getTransaction(), ExecutorType.SIMPLE);
List<Object> values =
keyExecutor.query(
keyStatement, parameter, RowBounds.DEFAULT, Executor.NO_RESULT_HANDLER);
if (values.size() == 0) {
throw new ExecutorException("SelectKey returned no data.");
} else if (values.size() > 1) {
throw new ExecutorException("SelectKey returned more than one value.");
} else {
metaParam.setValue(keyProperty, values.get(0));
}
}
}
} catch (ExecutorException e) {
throw e;
} catch (Exception e) {
throw new ExecutorException(
"Error selecting key or setting result to parameter object. Cause: " + e, e);
}
}
/**
* 构建ResultMap对象
*
* @param id
* @param clazz
* @param configuration
* @return
*/
private ResultMap buildResultMap(String id, Class<?> clazz, Configuration configuration) {
// 判断是否已经存在缓存里
if (configuration.hasResultMap(id)) {
return configuration.getResultMap(id);
}
List<ResultMapping> resultMappings = Lists.newArrayList();
Map<String, Field> columns = EntityUtil.getFields(clazz);
for (Map.Entry<String, Field> column : columns.entrySet()) {
Field field = column.getValue();
String fieldName = field.getName();
Class<?> columnTypeClass = resolveResultJavaType(clazz, fieldName, null);
List<ResultFlag> flags = Lists.newArrayList();
if (field.isAnnotationPresent(Id.class)) {
flags.add(ResultFlag.ID);
}
String columnName = column.getKey();
resultMappings.add(
buildResultMapping(configuration, fieldName, columnName, columnTypeClass, flags));
}
// 构建ResultMap
ResultMap.Builder resultMapBuilder =
new ResultMap.Builder(configuration, id, clazz, resultMappings);
ResultMap rm = resultMapBuilder.build();
// 放到缓存中
configuration.addResultMap(rm);
return rm;
}
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();
}
/**
* 使用DataSource初始化SqlSessionFactory
*
* @param ds
*/
public static void initialize(DataSource ds) {
TransactionFactory transactionFactory = new MybatisTransactionFactory();
Environment environment = new Environment("snaker", transactionFactory, ds);
Configuration configuration = new Configuration(environment);
configuration.getTypeAliasRegistry().registerAliases(SCAN_PACKAGE, Object.class);
if (log.isInfoEnabled()) {
Map<String, Class<?>> typeAliases = configuration.getTypeAliasRegistry().getTypeAliases();
for (Entry<String, Class<?>> entry : typeAliases.entrySet()) {
log.info(
"Scanned class:[name=" + entry.getKey() + ",class=" + entry.getValue().getName() + "]");
}
}
try {
for (String resource : resources) {
InputStream in = Resources.getResourceAsStream(resource);
XMLMapperBuilder xmlMapperBuilder =
new XMLMapperBuilder(in, configuration, resource, configuration.getSqlFragments());
xmlMapperBuilder.parse();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
ErrorContext.instance().reset();
}
sqlSessionFactory = new SqlSessionFactoryBuilder().build(configuration);
}
private void resolveTypeHandler() {
if (resultMapping.typeHandler == null && resultMapping.javaType != null) {
Configuration configuration = resultMapping.configuration;
TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
resultMapping.typeHandler =
typeHandlerRegistry.getTypeHandler(resultMapping.javaType, resultMapping.jdbcType);
}
}
/** 验证Statement */
private void validateStatement() {
if (!config.hasStatement(commandName)) {
throw new BindingException("Invalid bound statement (not found): " + commandName);
}
if (!config.hasStatement(commandCountName)) {
throw new BindingException("Invalid bound statement (not found): " + commandCountName);
}
}
@Test(groups = {"tidb"})
public void shouldSuccessfullyLoadXMLMapperFile() throws Exception {
Configuration configuration = new Configuration();
String resource = "org/apache/ibatis/builder/AuthorMapper.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
XMLMapperBuilder builder =
new XMLMapperBuilder(inputStream, configuration, resource, configuration.getSqlFragments());
builder.parse();
}
private SessionFactory() {
DataSource dataSource = SessionManager.getInstance().getDataSource();
TransactionFactory transactionFactory = new JdbcTransactionFactory();
Environment environment = new Environment("development", transactionFactory, dataSource);
Configuration configuration = new Configuration(environment);
configuration.addMapper(TableMapper.class);
sqlMapper = new SqlSessionFactoryBuilder().build(configuration);
}
public DynamicContext(Configuration configuration, Object parameterObject) {
if (parameterObject != null && !(parameterObject instanceof Map)) {
MetaObject metaObject = configuration.newMetaObject(parameterObject);
bindings = new ContextMap(metaObject);
} else {
bindings = new ContextMap(null);
}
bindings.put(PARAMETER_OBJECT_KEY, parameterObject);
bindings.put(DATABASE_ID_KEY, configuration.getDatabaseId());
}
/**
* 对SQL参数(?)设值, 参考org.apache.ibatis.executor.parameter.DefaultParameterHandler。
*
* @param ps 表示预编译的 SQL 语句的对象。
* @param mappedStatement MappedStatement
* @param boundSql SQL
* @param parameterObject 参数对象
* @throws java.sql.SQLException 数据库异常
*/
@SuppressWarnings("unchecked")
public static void setParameters(
PreparedStatement ps,
MappedStatement mappedStatement,
BoundSql boundSql,
Object parameterObject)
throws SQLException {
ErrorContext.instance()
.activity("setting parameters")
.object(mappedStatement.getParameterMap().getId());
List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
if (parameterMappings != null) {
Configuration configuration = mappedStatement.getConfiguration();
TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
MetaObject metaObject =
parameterObject == null ? null : configuration.newMetaObject(parameterObject);
for (int i = 0; i < parameterMappings.size(); i++) {
ParameterMapping parameterMapping = parameterMappings.get(i);
if (parameterMapping.getMode() != ParameterMode.OUT) {
Object value;
String propertyName = parameterMapping.getProperty();
PropertyTokenizer prop = new PropertyTokenizer(propertyName);
if (parameterObject == null) {
value = null;
} else if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
value = parameterObject;
} else if (boundSql.hasAdditionalParameter(propertyName)) {
value = boundSql.getAdditionalParameter(propertyName);
} else if (propertyName.startsWith(ForEachSqlNode.ITEM_PREFIX)
&& boundSql.hasAdditionalParameter(prop.getName())) {
value = boundSql.getAdditionalParameter(prop.getName());
if (value != null) {
value =
configuration
.newMetaObject(value)
.getValue(propertyName.substring(prop.getName().length()));
}
} else {
value = metaObject == null ? null : metaObject.getValue(propertyName);
}
@SuppressWarnings("rawtypes")
TypeHandler typeHandler = parameterMapping.getTypeHandler();
if (typeHandler == null) {
throw new ExecutorException(
"There was no TypeHandler found for parameter "
+ propertyName
+ " of statement "
+ mappedStatement.getId());
}
typeHandler.setParameter(ps, i + 1, value, parameterMapping.getJdbcType());
}
}
}
}
private void makeSureGeneratedKeysAreNotUsedInBatchInserts(String statement) {
Configuration configuration = session.getConfiguration();
if (null != configuration) {
MappedStatement mappedStatement = configuration.getMappedStatement(statement);
if (null != mappedStatement) {
KeyGenerator keyGenerator = mappedStatement.getKeyGenerator();
if (keyGenerator instanceof Jdbc3KeyGenerator) {
throw new IllegalStateException("Batch inserts cannot use generated keys");
}
}
}
}
private Executor newExecutor() throws SQLException {
final Environment environment = configuration.getEnvironment();
if (environment == null)
throw new ExecutorException(
"ResultLoader could not load lazily. Environment was not configured.");
final DataSource ds = environment.getDataSource();
if (ds == null)
throw new ExecutorException(
"ResultLoader could not load lazily. DataSource was not configured.");
final TransactionFactory transactionFactory = environment.getTransactionFactory();
final Transaction tx = transactionFactory.newTransaction(ds, null, false);
return configuration.newExecutor(tx, ExecutorType.SIMPLE);
}
private void loadMapper(Configuration configuration, String mapperName) {
InputStream input = null;
try {
input = getClass().getResourceAsStream("/" + mapperName.replace('.', '/') + ".xml");
new XMLMapperBuilder(input, configuration, mapperName, configuration.getSqlFragments())
.parse();
configuration.addLoadedResource(mapperName);
logback.setLoggerLevel(mapperName, Level.INFO);
} catch (Exception e) {
throw new IllegalArgumentException("Unable to load mapper " + mapperName, e);
} finally {
Closeables.closeQuietly(input);
}
}
private EnhancedResultObjectProxyImpl(
Class<?> type,
ResultLoaderMap lazyLoader,
Configuration configuration,
ObjectFactory objectFactory,
List<Class<?>> constructorArgTypes,
List<Object> constructorArgs) {
this.type = type;
this.lazyLoader = lazyLoader;
this.aggressive = configuration.isAggressiveLazyLoading();
this.lazyLoadTriggerMethods = configuration.getLazyLoadTriggerMethods();
this.objectFactory = objectFactory;
this.constructorArgTypes = constructorArgTypes;
this.constructorArgs = constructorArgs;
}
// TODO: Not supported.
@Test(
groups = {"tidb-todo"},
enabled = false)
public void shouldNotLoadTheSameNamespaceFromTwoResourcesWithDifferentNames() throws Exception {
Configuration configuration = new Configuration();
String resource = "org/apache/ibatis/builder/AuthorMapper.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
XMLMapperBuilder builder =
new XMLMapperBuilder(inputStream, configuration, "name1", configuration.getSqlFragments());
builder.parse();
InputStream inputStream2 = Resources.getResourceAsStream(resource);
XMLMapperBuilder builder2 =
new XMLMapperBuilder(inputStream2, configuration, "name2", configuration.getSqlFragments());
builder2.parse();
}
private boolean applyPropertyMappings(
ResultSetWrapper rsw,
ResultMap resultMap,
MetaObject metaObject,
ResultLoaderMap lazyLoader,
String columnPrefix)
throws SQLException {
final List<String> mappedColumnNames = rsw.getMappedColumnNames(resultMap, columnPrefix);
boolean foundValues = false;
final List<ResultMapping> propertyMappings = resultMap.getPropertyResultMappings();
for (ResultMapping propertyMapping : propertyMappings) {
final String column = prependPrefix(propertyMapping.getColumn(), columnPrefix);
if (propertyMapping.isCompositeResult()
|| (column != null && mappedColumnNames.contains(column.toUpperCase(Locale.ENGLISH)))
|| propertyMapping.getResultSet() != null) {
Object value =
getPropertyMappingValue(
rsw.getResultSet(), metaObject, propertyMapping, lazyLoader, columnPrefix);
final String property = propertyMapping.getProperty(); // issue #541 make property optional
if (value != NO_VALUE
&& property != null
&& (value != null
|| configuration.isCallSettersOnNulls())) { // issue #377, call setter on nulls
if (value != null || !metaObject.getSetterType(property).isPrimitive()) {
metaObject.setValue(property, value);
}
foundValues = true;
}
}
}
return foundValues;
}
/** 设置当前的参数的类型信息 */
private void setupCommandType() {
MappedStatement ms = config.getMappedStatement(commandName);
type = ms.getSqlCommandType();
if (type != SqlCommandType.SELECT) {
throw new BindingException("Unsupport execution method for: " + commandName);
}
}
public BoundSql getBoundSql(Object parameterObject) {
BoundSql boundSql = sqlSource.getBoundSql(parameterObject);
List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
if (parameterMappings == null || parameterMappings.size() <= 0) {
boundSql =
new BoundSql(
configuration,
boundSql.getSql(),
parameterMap.getParameterMappings(),
parameterObject);
}
// check for nested result maps in parameter mappings (issue #30)
for (ParameterMapping pm : boundSql.getParameterMappings()) {
String rmId = pm.getResultMapId();
if (rmId != null) {
ResultMap rm = configuration.getResultMap(rmId);
if (rm != null) {
hasNestedResultMaps |= rm.hasNestedResultMaps();
}
}
}
return boundSql;
}
public CacheKey createCacheKey(
MappedStatement ms, Object parameterObject, RowBounds rowBounds, BoundSql boundSql) {
if (closed) throw new ExecutorException("Executor was closed.");
CacheKey cacheKey = new CacheKey();
cacheKey.update(ms.getId());
cacheKey.update(rowBounds.getOffset());
cacheKey.update(rowBounds.getLimit());
cacheKey.update(boundSql.getSql());
List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
if (parameterMappings.size() > 0 && parameterObject != null) {
TypeHandlerRegistry typeHandlerRegistry = ms.getConfiguration().getTypeHandlerRegistry();
if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
cacheKey.update(parameterObject);
} else {
MetaObject metaObject = configuration.newMetaObject(parameterObject);
for (ParameterMapping parameterMapping : parameterMappings) {
String propertyName = parameterMapping.getProperty();
if (metaObject.hasGetter(propertyName)) {
cacheKey.update(metaObject.getValue(propertyName));
} else if (boundSql.hasAdditionalParameter(propertyName)) {
cacheKey.update(boundSql.getAdditionalParameter(propertyName));
}
}
}
}
return cacheKey;
}
private Object getNestedQueryConstructorValue(
ResultSet rs, ResultMapping constructorMapping, String columnPrefix) throws SQLException {
final String nestedQueryId = constructorMapping.getNestedQueryId();
final MappedStatement nestedQuery = configuration.getMappedStatement(nestedQueryId);
final Class<?> nestedQueryParameterType = nestedQuery.getParameterMap().getType();
final Object nestedQueryParameterObject =
prepareParameterForNestedQuery(
rs, constructorMapping, nestedQueryParameterType, columnPrefix);
Object value = null;
if (nestedQueryParameterObject != null) {
final BoundSql nestedBoundSql = nestedQuery.getBoundSql(nestedQueryParameterObject);
final CacheKey key =
executor.createCacheKey(
nestedQuery, nestedQueryParameterObject, RowBounds.DEFAULT, nestedBoundSql);
final Class<?> targetType = constructorMapping.getJavaType();
final ResultLoader resultLoader =
new ResultLoader(
configuration,
executor,
nestedQuery,
nestedQueryParameterObject,
targetType,
key,
nestedBoundSql);
value = resultLoader.loadResult();
}
return value;
}
private Object createParameterizedResultObject(
ResultSetWrapper rsw,
Class<?> resultType,
List<ResultMapping> constructorMappings,
List<Class<?>> constructorArgTypes,
List<Object> constructorArgs,
String columnPrefix)
throws SQLException {
boolean foundValues = false;
for (ResultMapping constructorMapping : constructorMappings) {
final Class<?> parameterType = constructorMapping.getJavaType();
final String column = constructorMapping.getColumn();
final Object value;
if (constructorMapping.getNestedQueryId() != null) {
value =
getNestedQueryConstructorValue(rsw.getResultSet(), constructorMapping, columnPrefix);
} else if (constructorMapping.getNestedResultMapId() != null) {
final ResultMap resultMap =
configuration.getResultMap(constructorMapping.getNestedResultMapId());
value = getRowValue(rsw, resultMap);
} else {
final TypeHandler<?> typeHandler = constructorMapping.getTypeHandler();
value = typeHandler.getResult(rsw.getResultSet(), prependPrefix(column, columnPrefix));
}
constructorArgTypes.add(parameterType);
constructorArgs.add(value);
foundValues = value != null || foundValues;
}
return foundValues
? objectFactory.create(resultType, constructorArgTypes, constructorArgs)
: null;
}
private void createRowKeyForMappedProperties(
ResultMap resultMap,
ResultSetWrapper rsw,
CacheKey cacheKey,
List<ResultMapping> resultMappings,
String columnPrefix)
throws SQLException {
for (ResultMapping resultMapping : resultMappings) {
if (resultMapping.getNestedResultMapId() != null
&& resultMapping.getResultSet() == null) { // Issue #392
final ResultMap nestedResultMap =
configuration.getResultMap(resultMapping.getNestedResultMapId());
createRowKeyForMappedProperties(
nestedResultMap,
rsw,
cacheKey,
nestedResultMap.getConstructorResultMappings(),
prependPrefix(resultMapping.getColumnPrefix(), columnPrefix));
} else if (resultMapping.getNestedQueryId() == null) {
final String column = prependPrefix(resultMapping.getColumn(), columnPrefix);
final TypeHandler<?> th = resultMapping.getTypeHandler();
List<String> mappedColumnNames = rsw.getMappedColumnNames(resultMap, columnPrefix);
if (column != null
&& mappedColumnNames.contains(column.toUpperCase(Locale.ENGLISH))) { // Issue #114
final Object value = th.getResult(rsw.getResultSet(), column);
if (value != null) {
cacheKey.update(column);
cacheKey.update(value);
}
}
}
}
}
private void createRowKeyForUnmappedProperties(
ResultMap resultMap, ResultSetWrapper rsw, CacheKey cacheKey, String columnPrefix)
throws SQLException {
final MetaClass metaType = MetaClass.forClass(resultMap.getType());
List<String> unmappedColumnNames = rsw.getUnmappedColumnNames(resultMap, columnPrefix);
for (String column : unmappedColumnNames) {
String property = column;
if (columnPrefix != null && columnPrefix.length() > 0) {
// When columnPrefix is specified,
// ignore columns without the prefix.
if (column.toUpperCase(Locale.ENGLISH).startsWith(columnPrefix)) {
property = column.substring(columnPrefix.length());
} else {
continue;
}
}
if (metaType.findProperty(property, configuration.isMapUnderscoreToCamelCase()) != null) {
String value = rsw.getResultSet().getString(column);
if (value != null) {
cacheKey.update(column);
cacheKey.update(value);
}
}
}
}
public List<Object> handleResultSets(Statement stmt) throws SQLException {
final List<Object> multipleResults = new ArrayList<Object>();
int resultSetCount = 0;
ResultSetWrapper rsw = getFirstResultSet(stmt);
List<ResultMap> resultMaps = mappedStatement.getResultMaps();
int resultMapCount = resultMaps.size();
validateResultMapsCount(rsw, resultMapCount);
while (rsw != null && resultMapCount > resultSetCount) {
ResultMap resultMap = resultMaps.get(resultSetCount);
handleResultSet(rsw, resultMap, multipleResults, null);
rsw = getNextResultSet(stmt);
cleanUpAfterHandlingResultSet();
resultSetCount++;
}
String[] resultSets = mappedStatement.getResulSets();
if (resultSets != null) {
while (rsw != null && resultSetCount < resultSets.length) {
ResultMapping parentMapping = nextResultMaps.get(resultSets[resultSetCount]);
if (parentMapping != null) {
String nestedResultMapId = parentMapping.getNestedResultMapId();
ResultMap resultMap = configuration.getResultMap(nestedResultMapId);
handleResultSet(rsw, resultMap, null, parentMapping);
}
rsw = getNextResultSet(stmt);
cleanUpAfterHandlingResultSet();
resultSetCount++;
}
}
return collapseSingleResultList(multipleResults);
}
private Object createResultObject(
ResultSetWrapper rsw, ResultMap resultMap, ResultLoaderMap lazyLoader, String columnPrefix)
throws SQLException {
final List<Class<?>> constructorArgTypes = new ArrayList<Class<?>>();
final List<Object> constructorArgs = new ArrayList<Object>();
final Object resultObject =
createResultObject(rsw, resultMap, constructorArgTypes, constructorArgs, columnPrefix);
if (resultObject != null && !typeHandlerRegistry.hasTypeHandler(resultMap.getType())) {
final List<ResultMapping> propertyMappings = resultMap.getPropertyResultMappings();
for (ResultMapping propertyMapping : propertyMappings) {
if (propertyMapping.getNestedQueryId() != null
&& propertyMapping.isLazy()) { // issue gcode #109 && issue #149
return configuration
.getProxyFactory()
.createProxy(
resultObject,
lazyLoader,
configuration,
objectFactory,
constructorArgTypes,
constructorArgs);
}
}
}
return resultObject;
}
public Builder(Configuration configuration, String property) {
resultMapping.configuration = configuration;
resultMapping.property = property;
resultMapping.flags = new ArrayList<org.apache.ibatis.mapping.ResultFlag>();
resultMapping.composites = new ArrayList<org.apache.ibatis.mapping.ResultMapping>();
resultMapping.lazy = configuration.isLazyLoadingEnabled();
}
/**
* 获取数据库类型
*
* @param metaObject
* @return 返回数据库类型的枚举对象
*/
private Dialect.Type searchDbTypeByConfig(Configuration configuration) {
String dialectConfig = configuration.getVariables().getProperty("dialect");
if (dialectConfig != null && !"".equals(dialectConfig)) {
return Dialect.Type.valueOf(dialectConfig.toUpperCase());
} else {
throw new RuntimeException("databaseType is null , please check your mybatis configuration!");
}
}
public DefaultResultSetHandler(
Executor executor,
MappedStatement mappedStatement,
ParameterHandler parameterHandler,
ResultHandler resultHandler,
BoundSql boundSql,
RowBounds rowBounds) {
this.executor = executor;
this.configuration = mappedStatement.getConfiguration();
this.mappedStatement = mappedStatement;
this.rowBounds = rowBounds;
this.parameterHandler = parameterHandler;
this.boundSql = boundSql;
this.typeHandlerRegistry = configuration.getTypeHandlerRegistry();
this.objectFactory = configuration.getObjectFactory();
this.resultHandler = resultHandler;
}