public List<Expression> copyDerivedExpressions(Map alreadyDone) {
if (this.derivedExpressions == null) {
return null;
}
List<Expression> derivedExpressionsCopy;
synchronized (this) {
derivedExpressionsCopy = new ArrayList(this.derivedExpressions);
}
List<Expression> result = new ArrayList(derivedExpressionsCopy.size());
for (Expression exp : derivedExpressionsCopy) {
result.add(exp.copiedVersionFrom(alreadyDone));
}
return result;
}
/**
* INTERNAL: The results are *not* in a cursor, build the collection. Cache the results in
* temporaryCachedQueryResults.
*/
protected Object executeNonCursor() throws DatabaseException {
Vector rows = getQueryMechanism().executeSelect();
Object results = null;
if (this.resultType == MAP) {
results = getContainerPolicy().buildContainerFromVector(rows, this.session);
} else if (this.resultType == VALUE) {
if (!rows.isEmpty()) {
AbstractRecord record = (AbstractRecord) rows.get(0);
// Use get with field for XML records.
results = record.get(record.getFields().get(0));
if (getValueConverter() != null) {
results = getValueConverter().convertDataValueToObjectValue(results, this.session);
}
}
} else {
int size = rows.size();
ContainerPolicy containerPolicy = getContainerPolicy();
results = containerPolicy.containerInstance(size);
if (containerPolicy.shouldAddAll()) {
if (size > 0) {
List values = new ArrayList(size);
for (int index = 0; index < size; index++) {
AbstractRecord row = (AbstractRecord) rows.get(index);
Object value = buildObject(row);
values.add(value);
}
containerPolicy.addAll(values, results, this.session, rows, this);
}
} else {
for (int index = 0; index < size; index++) {
AbstractRecord row = (AbstractRecord) rows.get(index);
Object value = buildObject(row);
containerPolicy.addInto(value, results, this.session, row, this);
}
}
}
// Bug 6135563 - cache DataReadQuery results verbatim, as ObjectBuilder is not invoked
cacheResult(results);
return results;
}
/**
* INTERNAL: Parses an expression to return the first non-AggregateObjectMapping expression after
* the base ExpressionBuilder. This is used by joining and batch fetch to get the list of mappings
* that really need to be processed (non-aggregates).
*
* @param aggregateMappingsEncountered - collection of aggregateObjectMapping expressions
* encountered in the returned expression between the first expression and the
* ExpressionBuilder
* @return first non-AggregateObjectMapping expression after the base ExpressionBuilder from the
* fullExpression
*/
public ObjectExpression getFirstNonAggregateExpressionAfterExpressionBuilder(
List aggregateMappingsEncountered) {
boolean done = false;
ObjectExpression baseExpression = this;
ObjectExpression prevExpression = this;
while (!baseExpression.getBaseExpression().isExpressionBuilder() && !done) {
baseExpression = (ObjectExpression) baseExpression.getBaseExpression();
while (!baseExpression.isExpressionBuilder()
&& baseExpression.getMapping().isAggregateObjectMapping()) {
aggregateMappingsEncountered.add(baseExpression.getMapping());
baseExpression = (ObjectExpression) baseExpression.getBaseExpression();
}
if (baseExpression.isExpressionBuilder()) {
done = true;
// use the one closest to the expression builder that wasn't an aggregate
baseExpression = prevExpression;
} else {
prevExpression = baseExpression;
}
}
return baseExpression;
}
