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);
}
}
}
/** 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);
}
}
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 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 Object getNestedQueryMappingValue(
ResultSet rs,
MetaObject metaResultObject,
ResultMapping propertyMapping,
ResultLoaderMap lazyLoader,
String columnPrefix)
throws SQLException {
final String nestedQueryId = propertyMapping.getNestedQueryId();
final String property = propertyMapping.getProperty();
final MappedStatement nestedQuery = configuration.getMappedStatement(nestedQueryId);
final Class<?> nestedQueryParameterType = nestedQuery.getParameterMap().getType();
final Object nestedQueryParameterObject =
prepareParameterForNestedQuery(rs, propertyMapping, nestedQueryParameterType, columnPrefix);
Object value = NO_VALUE;
if (nestedQueryParameterObject != null) {
final BoundSql nestedBoundSql = nestedQuery.getBoundSql(nestedQueryParameterObject);
final CacheKey key =
executor.createCacheKey(
nestedQuery, nestedQueryParameterObject, RowBounds.DEFAULT, nestedBoundSql);
final Class<?> targetType = propertyMapping.getJavaType();
if (executor.isCached(nestedQuery, key)) {
executor.deferLoad(nestedQuery, metaResultObject, property, key, targetType);
} else {
final ResultLoader resultLoader =
new ResultLoader(
configuration,
executor,
nestedQuery,
nestedQueryParameterObject,
targetType,
key,
nestedBoundSql);
if (propertyMapping.isLazy()) {
lazyLoader.addLoader(property, metaResultObject, resultLoader);
} else {
value = resultLoader.loadResult();
}
}
}
return value;
}