/**
* Convenience method that takes a result set that contains a discriminator column and returns the
* class name that it represents.
*
* @param discrimMapping Mapping for the discriminator column
* @param dismd Metadata for the discriminator
* @param rs The result set
* @param ec execution context
* @return The class name for the object represented in the current row
*/
public static String getClassNameFromDiscriminatorResultSetRow(
JavaTypeMapping discrimMapping,
DiscriminatorMetaData dismd,
ResultSet rs,
ExecutionContext ec) {
String rowClassName = null;
if (discrimMapping != null && dismd.getStrategy() != DiscriminatorStrategy.NONE) {
try {
String discriminatorColName =
discrimMapping.getDatastoreMapping(0).getColumn().getIdentifier().getIdentifierName();
String discriminatorValue = rs.getString(discriminatorColName);
rowClassName =
ec.getMetaDataManager().getClassNameFromDiscriminatorValue(discriminatorValue, dismd);
} catch (SQLException e) {
// discriminator column doesn't exist with this name
}
}
return rowClassName;
}
private static void addColumnsToScanForEmbeddedMember(
Scan scan, List<AbstractMemberMetaData> embMmds, Table table, ExecutionContext ec) {
AbstractMemberMetaData lastMmd = embMmds.get(embMmds.size() - 1);
ClassLoaderResolver clr = ec.getClassLoaderResolver();
AbstractClassMetaData embCmd =
ec.getMetaDataManager().getMetaDataForClass(lastMmd.getTypeName(), clr);
int[] embMmdPosns = embCmd.getAllMemberPositions();
for (int i = 0; i < embMmdPosns.length; i++) {
AbstractMemberMetaData embMmd = embCmd.getMetaDataForManagedMemberAtAbsolutePosition(i);
List<AbstractMemberMetaData> subEmbMmds = new ArrayList<AbstractMemberMetaData>(embMmds);
subEmbMmds.add(embMmd);
RelationType relationType = embMmd.getRelationType(clr);
MemberColumnMapping mapping = table.getMemberColumnMappingForEmbeddedMember(subEmbMmds);
if (RelationType.isRelationSingleValued(relationType)) {
addColumnsToScanForEmbeddedMember(scan, subEmbMmds, table, ec);
} else {
String familyName = HBaseUtils.getFamilyNameForColumn(mapping.getColumn(0));
String qualifName = HBaseUtils.getQualifierNameForColumn(mapping.getColumn(0));
scan.addColumn(familyName.getBytes(), qualifName.getBytes());
}
}
}
