private MiddleComponentData addIndex(
Element middleEntityXml, QueryGeneratorBuilder queryGeneratorBuilder) {
if (propertyValue instanceof IndexedCollection) {
IndexedCollection indexedValue = (IndexedCollection) propertyValue;
String mapKey = propertyAuditingData.getMapKey();
if (mapKey == null) {
// This entity doesn't specify a javax.persistence.MapKey. Mapping it to the middle entity.
return addValueToMiddleTable(
indexedValue.getIndex(), middleEntityXml, queryGeneratorBuilder, "mapkey", null);
} else {
IdMappingData referencedIdMapping =
mainGenerator.getEntitiesConfigurations().get(referencedEntityName).getIdMappingData();
int currentIndex =
queryGeneratorBuilder == null ? 0 : queryGeneratorBuilder.getCurrentIndex();
if ("".equals(mapKey)) {
// The key of the map is the id of the entity.
return new MiddleComponentData(
new MiddleMapKeyIdComponentMapper(
mainGenerator.getVerEntCfg(), referencedIdMapping.getIdMapper()),
currentIndex);
} else {
// The key of the map is a property of the entity.
return new MiddleComponentData(
new MiddleMapKeyPropertyComponentMapper(mapKey, propertyAuditingData.getAccessType()),
currentIndex);
}
}
} else {
// No index - creating a dummy mapper.
return new MiddleComponentData(new MiddleDummyComponentMapper(), 0);
}
}
/**
* @param value Value, which should be mapped to the middle-table, either as a relation to another
* entity, or as a simple value.
* @param xmlMapping If not <code>null</code>, xml mapping for this value is added to this
* element.
* @param queryGeneratorBuilder In case <code>value</code> is a relation to another entity,
* information about it should be added to the given.
* @param prefix Prefix for proeprty names of related entities identifiers.
* @param joinColumns Names of columns to use in the xml mapping, if this array isn't null and has
* any elements.
* @return Data for mapping this component.
*/
@SuppressWarnings({"unchecked"})
private MiddleComponentData addValueToMiddleTable(
Value value,
Element xmlMapping,
QueryGeneratorBuilder queryGeneratorBuilder,
String prefix,
JoinColumn[] joinColumns) {
Type type = value.getType();
if (type instanceof ManyToOneType) {
String prefixRelated = prefix + "_";
String referencedEntityName = MappingTools.getReferencedEntityName(value);
IdMappingData referencedIdMapping =
mainGenerator.getReferencedIdMappingData(
referencingEntityName, referencedEntityName, propertyAuditingData, true);
// Adding related-entity (in this case: the referenced entities id) id mapping to the xml only
// if the
// relation isn't inverse (so when <code>xmlMapping</code> is not null).
if (xmlMapping != null) {
addRelatedToXmlMapping(
xmlMapping,
prefixRelated,
joinColumns != null && joinColumns.length > 0
? MetadataTools.getColumnNameIterator(joinColumns)
: MetadataTools.getColumnNameIterator(value.getColumnIterator()),
referencedIdMapping);
}
// Storing the id data of the referenced entity: original mapper, prefixed mapper and entity
// name.
MiddleIdData referencedIdData =
createMiddleIdData(referencedIdMapping, prefixRelated, referencedEntityName);
// And adding it to the generator builder.
queryGeneratorBuilder.addRelation(referencedIdData);
return new MiddleComponentData(
new MiddleRelatedComponentMapper(referencedIdData),
queryGeneratorBuilder.getCurrentIndex());
} else {
// Last but one parameter: collection components are always insertable
boolean mapped =
mainGenerator
.getBasicMetadataGenerator()
.addBasic(
xmlMapping,
new PropertyAuditingData(
prefix,
"field",
ModificationStore.FULL,
RelationTargetAuditMode.AUDITED,
null,
null,
false),
value,
null,
true,
true);
if (mapped) {
// Simple values are always stored in the first item of the array returned by the query
// generator.
return new MiddleComponentData(
new MiddleSimpleComponentMapper(mainGenerator.getVerEntCfg(), prefix), 0);
} else {
mainGenerator.throwUnsupportedTypeException(type, referencingEntityName, propertyName);
// Impossible to get here.
throw new AssertionError();
}
}
}