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 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;
}
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 addPendingChildRelation(
ResultSet rs, MetaObject metaResultObject, ResultMapping parentMapping) throws SQLException {
CacheKey cacheKey =
createKeyForMultipleResults(
rs, parentMapping, parentMapping.getColumn(), parentMapping.getColumn());
PendingRelation deferLoad = new PendingRelation();
deferLoad.metaObject = metaResultObject;
deferLoad.propertyMapping = parentMapping;
pendingRelations.put(cacheKey, deferLoad);
ResultMapping previous = nextResultMaps.get(parentMapping.getResultSet());
if (previous == null) {
nextResultMaps.put(parentMapping.getResultSet(), parentMapping);
} else {
if (!previous.equals(parentMapping)) {
throw new ExecutorException("Two different properties are mapped to the same resultSet");
}
}
}
private Object prepareSimpleKeyParameter(
ResultSet rs, ResultMapping resultMapping, Class<?> parameterType, String columnPrefix)
throws SQLException {
final TypeHandler<?> typeHandler;
if (typeHandlerRegistry.hasTypeHandler(parameterType)) {
typeHandler = typeHandlerRegistry.getTypeHandler(parameterType);
} else {
typeHandler = typeHandlerRegistry.getUnknownTypeHandler();
}
return typeHandler.getResult(rs, prependPrefix(resultMapping.getColumn(), columnPrefix));
}
private Object createPrimitiveResultObject(
ResultSetWrapper rsw, ResultMap resultMap, String columnPrefix) throws SQLException {
final Class<?> resultType = resultMap.getType();
final String columnName;
if (resultMap.getResultMappings().size() > 0) {
final List<ResultMapping> resultMappingList = resultMap.getResultMappings();
final ResultMapping mapping = resultMappingList.get(0);
columnName = prependPrefix(mapping.getColumn(), columnPrefix);
} else {
columnName = rsw.getColumnNames().get(0);
}
final TypeHandler<?> typeHandler = rsw.getTypeHandler(resultType, columnName);
return typeHandler.getResult(rsw.getResultSet(), columnName);
}
private Object prepareCompositeKeyParameter(
ResultSet rs, ResultMapping resultMapping, Class<?> parameterType, String columnPrefix)
throws SQLException {
final Object parameterObject = instantiateParameterObject(parameterType);
final MetaObject metaObject = configuration.newMetaObject(parameterObject);
boolean foundValues = false;
for (ResultMapping innerResultMapping : resultMapping.getComposites()) {
final Class<?> propType = metaObject.getSetterType(innerResultMapping.getProperty());
final TypeHandler<?> typeHandler = typeHandlerRegistry.getTypeHandler(propType);
final Object propValue =
typeHandler.getResult(rs, prependPrefix(innerResultMapping.getColumn(), columnPrefix));
if (propValue != null) { // issue #353 & #560 do not execute nested query if key is null
metaObject.setValue(innerResultMapping.getProperty(), propValue);
foundValues = true;
}
}
return foundValues ? parameterObject : null;
}
private void linkToParent(ResultSet rs, ResultMapping parentMapping, Object rowValue)
throws SQLException {
CacheKey parentKey =
createKeyForMultipleResults(
rs, parentMapping, parentMapping.getColumn(), parentMapping.getForeignColumn());
PendingRelation parent = pendingRelations.get(parentKey);
if (parent != null) {
final Object collectionProperty =
instantiateCollectionPropertyIfAppropriate(parent.propertyMapping, parent.metaObject);
if (rowValue != null) {
if (collectionProperty != null) {
final MetaObject targetMetaObject = configuration.newMetaObject(collectionProperty);
targetMetaObject.add(rowValue);
} else {
parent.metaObject.setValue(parent.propertyMapping.getProperty(), rowValue);
}
}
}
}
private Object getPropertyMappingValue(
ResultSet rs,
MetaObject metaResultObject,
ResultMapping propertyMapping,
ResultLoaderMap lazyLoader,
String columnPrefix)
throws SQLException {
if (propertyMapping.getNestedQueryId() != null) {
return getNestedQueryMappingValue(
rs, metaResultObject, propertyMapping, lazyLoader, columnPrefix);
} else if (propertyMapping.getResultSet() != null) {
addPendingChildRelation(rs, metaResultObject, propertyMapping);
return NO_VALUE;
} else if (propertyMapping.getNestedResultMapId() != null) {
// the user added a column attribute to a nested result map, ignore it
return NO_VALUE;
} else {
final TypeHandler<?> typeHandler = propertyMapping.getTypeHandler();
final String column = prependPrefix(propertyMapping.getColumn(), columnPrefix);
return typeHandler.getResult(rs, column);
}
}
private Object getDiscriminatorValue(
ResultSet rs, Discriminator discriminator, String columnPrefix) throws SQLException {
final ResultMapping resultMapping = discriminator.getResultMapping();
final TypeHandler<?> typeHandler = resultMapping.getTypeHandler();
return typeHandler.getResult(rs, prependPrefix(resultMapping.getColumn(), columnPrefix));
}