public IDataStore getDomainValues(
String fieldName, Integer start, Integer limit, IDataStoreFilter filter) {
IDataStore toReturn = null;
try {
String tableName = this.getTemporaryTableName();
logger.debug("Temporary table name : [" + tableName + "]");
if (tableName == null) {
logger.error("Temporary table name not set, cannot proceed!!");
throw new SpagoBIEngineRuntimeException("Temporary table name not set");
}
IDataSource dataSource = this.getDataSourceForPersistence();
if (dataSource == null) {
logger.error("Datasource for persistence not set, cannot proceed!!");
throw new SpagoBIEngineRuntimeException("Datasource for persistence not set");
}
String signature = this.getSignature();
IDataSetTableDescriptor tableDescriptor = null;
if (signature.equals(TemporaryTableManager.getLastDataSetSignature(tableName))) {
// signature matches: no need to create a TemporaryTable
tableDescriptor = TemporaryTableManager.getLastDataSetTableDescriptor(tableName);
} else {
tableDescriptor = this.persist(tableName, dataSource);
TemporaryTableManager.setLastDataSetTableDescriptor(tableName, tableDescriptor);
TemporaryTableManager.setLastDataSetSignature(tableName, signature);
}
String filterColumnName = tableDescriptor.getColumnName(fieldName);
StringBuffer buffer =
new StringBuffer("Select DISTINCT " + filterColumnName + " FROM " + tableName);
manageFilterOnDomainValues(buffer, fieldName, tableDescriptor, filter);
String sqlStatement = buffer.toString();
toReturn = TemporaryTableManager.queryTemporaryTable(sqlStatement, dataSource, start, limit);
toReturn.getMetaData().changeFieldAlias(0, fieldName);
} catch (Exception e) {
logger.error("Error loading the domain values for the field " + fieldName, e);
throw new SpagoBIEngineRuntimeException(
"Error loading the domain values for the field " + fieldName, e);
}
return toReturn;
}
public IDataSetTableDescriptor persist(String tableName, IDataSource dataSource) {
PersistedTableManager persister = new PersistedTableManager();
try {
persister.persistDataSet(this, dataSource, tableName);
} catch (Exception e) {
throw new SpagoBIRuntimeException("Error while persisting dataset", e);
}
List<String> fields = this.getFieldsList();
IDataSetTableDescriptor descriptor = null;
try {
descriptor = TemporaryTableManager.getTableDescriptor(fields, tableName, dataSource);
} catch (Exception e) {
throw new SpagoBIRuntimeException("Error while getting table information", e);
}
return descriptor;
}