public void initCmbValues(Component comp) { // first click in panel
if (comp != null) {
FeatureList featList = new FeatureList(FeatureManager.getDefaultFeatures(comp.getName()));
componentName.setText("Component: " + comp.getName());
cmbFeatures.removeAllItems();
for (Feature feat : featList.getFeatureList()) {
cmbFeatures.addItem(feat.getName());
}
renewCmbValues(comp);
unlockComponents();
}
}
public void renewCmbValues(Component comp) { // call when an item state changes in Cmb
DBFeatureValues values = null;
if (comp != null && cmbFeatures.getSelectedItem() != null) {
// try{
values =
FeatureManager.getFeatureValues(comp.getName(), cmbFeatures.getSelectedItem().toString());
// }catch(Exception e){}
unlockComponents();
// remove listeners first so that changing the values in combo box will not trigger saves
removeCmbValuesListeners();
cmbValues.removeAllItems();
if (values != null) {
for (String value : values.getValues()) {
cmbValues.addItem(value);
}
cmbValues.setSelectedItem(
comp.getFeature(cmbFeatures.getSelectedItem().toString()).getValue());
}
cmbValues.addItemListener(saveFeatureListener);
}
}
private int attachToQueryPlan() {
if (_aggOps.isEmpty()) {
ProjectionOperator project = new ProjectionOperator(_selectExpr);
_affectedComponent.setProjection(project);
return NON_AGG;
} else if (_aggOps.size() == 1) {
// all the others are group by
AggregateOperator firstAgg = _aggOps.get(0);
if (ParserUtil.isAllColumnRefs(_selectExpr)) {
// plain fields in select
List<Integer> groupByColumns = ParserUtil.extractColumnIndexes(_selectExpr);
firstAgg.setGroupByColumns(groupByColumns);
// Setting new level of components is necessary for correctness only for distinct in
// aggregates
// but it's certainly pleasant to have the final result grouped on nodes by group by
// columns.
boolean newLevel = !(HierarchyExtractor.isHashedBy(_affectedComponent, groupByColumns));
if (newLevel) {
_affectedComponent.setHashIndexes(groupByColumns);
OperatorComponent newComponent =
new OperatorComponent(
_affectedComponent, ParserUtil.generateUniqueName("OPERATOR"), _queryPlan)
.setAggregation(firstAgg);
// this now becomes "active component"
_affectedComponent = newComponent;
} else {
_affectedComponent.setAggregation(firstAgg);
}
} else {
// Sometimes selectExpr contains other functions, so we have to use projections instead of
// simple groupBy
// Check for complexity
if (_affectedComponent.getHashExpressions() != null
&& !_affectedComponent.getHashExpressions().isEmpty()) {
throw new RuntimeException(
"Too complex: cannot have hashExpression both for joinCondition and groupBy!");
}
// WARNING: _selectExpr cannot be used on two places: that's why we do deep copy
_affectedComponent.setHashExpressions((List<ValueExpression>) DeepCopy.copy(_selectExpr));
// always new level
ProjectionOperator groupByProj =
new ProjectionOperator((List<ValueExpression>) DeepCopy.copy(_selectExpr));
firstAgg.setGroupByProjection(groupByProj);
OperatorComponent newComponent =
new OperatorComponent(
_affectedComponent, ParserUtil.generateUniqueName("OPERATOR"), _queryPlan)
.setAggregation(firstAgg);
// this now becomes "active component"
_affectedComponent = newComponent;
}
return AGG;
} else {
throw new RuntimeException("For now only one aggregate function supported!");
}
}