private Constraint addEvaluationToAllConstraints(QConEvaluation eval) {
if (i_constraints.size() == 0) {
_trans
.container()
.classCollection()
.iterateTopLevelClasses(
new Visitor4() {
public void visit(Object obj) {
ClassMetadata classMetadata = (ClassMetadata) obj;
QConClass qcc = new QConClass(_trans, classMetadata.classReflector());
addConstraint(qcc);
toConstraint(i_constraints).or(qcc);
}
});
}
Iterator4 i = iterateConstraints();
while (i.moveNext()) {
((QCon) i.current()).addConstraint(eval);
}
// FIXME: should return valid Constraint object
return null;
}
public void unmarshall(final Transaction a_trans) {
_evaluationMode = QueryEvaluationMode.fromInt(_evaluationModeAsInt);
_trans = a_trans;
Iterator4 i = iterateConstraints();
while (i.moveNext()) {
((QCon) i.current()).unmarshall(a_trans);
}
}
private void logConstraints() {
if (Debug4.queries) {
Iterator4 i = iterateConstraints();
while (i.moveNext()) {
((QCon) i.current()).log("");
}
}
}
public void marshall() {
checkConstraintsEvaluationMode();
_evaluationModeAsInt = _evaluationMode.asInt();
Iterator4 i = iterateConstraints();
while (i.moveNext()) {
((QCon) i.current()).getRoot().marshall();
}
}
private boolean constraintCanBeAddedToExisting(List4 candidatesList, QCon constraint) {
Iterator4 j = new Iterator4Impl(candidatesList);
while (j.moveNext()) {
QCandidates candidates = (QCandidates) j.current();
if (candidates.fitsIntoExistingConstraintHierarchy(constraint)) {
return true;
}
}
return false;
}
private void addConstraintToCandidatesList(List4 candidatesList, QCon qcon) {
if (candidatesList == null) {
return;
}
Iterator4 j = new Iterator4Impl(candidatesList);
while (j.moveNext()) {
QCandidates candidates = (QCandidates) j.current();
candidates.addConstraint(qcon);
}
}
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("QQueryBase\n");
Iterator4 i = iterateConstraints();
while (i.moveNext()) {
QCon constraint = (QCon) i.current();
sb.append(constraint);
sb.append("\n");
}
return sb.toString();
}
private boolean forEachConstraintRecursively(Function4 block) {
Queue4 queue = new NoDuplicatesQueue(new NonblockingQueue());
Iterator4 constrIter = iterateConstraints();
while (constrIter.moveNext()) {
queue.add(constrIter.current());
}
while (queue.hasNext()) {
QCon constr = (QCon) queue.next();
Boolean cancel = (Boolean) block.apply(constr);
if (cancel.booleanValue()) {
return true;
}
Iterator4 childIter = constr.iterateChildren();
while (childIter.moveNext()) {
queue.add(childIter.current());
}
Iterator4 joinIter = constr.iterateJoins();
while (joinIter.moveNext()) {
queue.add(joinIter.current());
}
}
return false;
}
// Our QConPath objects are just placeholders to fields,
// so the parents are reachable.
// If we find a "real" constraint, we throw the QPath
// out and replace it with the other constraint.
private void morph(BooleanByRef removeExisting, QCon newConstraint, ReflectClass claxx) {
boolean mayMorph = true;
if (claxx != null) {
ClassMetadata yc = i_trans.container().produceClassMetadata(claxx);
if (yc != null) {
Iterator4 i = iterateChildren();
while (i.moveNext()) {
QField qf = ((QCon) i.current()).getField();
if (!yc.hasField(i_trans.container(), qf.name())) {
mayMorph = false;
break;
}
}
}
}
if (mayMorph) {
Iterator4 j = iterateChildren();
while (j.moveNext()) {
newConstraint.addConstraint((QCon) j.current());
}
if (hasJoins()) {
Iterator4 k = iterateJoins();
while (k.moveNext()) {
QConJoin qcj = (QConJoin) k.current();
qcj.exchangeConstraint(this, newConstraint);
newConstraint.addJoin(qcj);
}
}
i_parent.exchangeConstraint(this, newConstraint);
removeExisting.value = true;
} else {
i_parent.addConstraint(newConstraint);
}
}
private Collection4 introduceClassConstrain(ReflectClass claxx) {
final Collection4 newConstraints = new Collection4();
final Iterator4 existingConstraints = iterateConstraints();
while (existingConstraints.moveNext()) {
final QCon existingConstraint = (QConObject) existingConstraints.current();
final BooleanByRef removeExisting = new BooleanByRef(false);
final QCon newConstraint = existingConstraint.shareParentForClass(claxx, removeExisting);
if (newConstraint != null) {
newConstraints.add(newConstraint);
addConstraint(newConstraint);
if (removeExisting.value) {
removeConstraint(existingConstraint);
}
}
}
return newConstraints;
}
private List4 createQCandidatesList() {
List4 candidatesList = null;
Iterator4 i = iterateConstraints();
while (i.moveNext()) {
QCon constraint = (QCon) i.current();
constraint = constraint.getRoot();
ClassMetadata classMetadata = constraint.getYapClass();
if (classMetadata == null) {
continue;
}
if (constraintCanBeAddedToExisting(candidatesList, constraint)) {
continue;
}
QCandidates candidates = new QCandidates((LocalTransaction) _trans, classMetadata, null);
candidatesList = new List4(candidatesList, candidates);
}
return candidatesList;
}
private static ReflectConstructorSpec findConstructor(
final ReflectClass claxx, Tree sortedConstructors) {
if (sortedConstructors == null) {
return ReflectConstructorSpec.INVALID_CONSTRUCTOR;
}
Iterator4 iter = new TreeNodeIterator(sortedConstructors);
while (iter.moveNext()) {
Object current = iter.current();
ReflectConstructor constructor = (ReflectConstructor) ((TreeIntObject) current)._object;
Object[] args = nullArgumentsFor(constructor);
Object res = constructor.newInstance(args);
if (res != null) {
return new ReflectConstructorSpec(constructor, args);
}
}
return ReflectConstructorSpec.INVALID_CONSTRUCTOR;
}
public CreateCandidateCollectionResult createCandidateCollection() {
List4 candidatesList = createQCandidatesList();
boolean checkDuplicates = false;
boolean topLevel = true;
Iterator4 i = iterateConstraints();
while (i.moveNext()) {
QCon constraint = (QCon) i.current();
QCon old = constraint;
constraint = constraint.getRoot();
if (constraint != old) {
checkDuplicates = true;
topLevel = false;
}
ClassMetadata classMetadata = constraint.getYapClass();
if (classMetadata == null) {
break;
}
addConstraintToCandidatesList(candidatesList, constraint);
}
return new CreateCandidateCollectionResult(candidatesList, checkDuplicates, topLevel);
}
public Iterator4 executeSnapshot() {
final CreateCandidateCollectionResult r = createCandidateCollection();
final Collection4 executionPath = executionPath(r);
Iterator4 candidatesIterator = new Iterator4Impl(r.candidateCollection);
Collection4 snapshots = new Collection4();
while (candidatesIterator.moveNext()) {
QCandidates candidates = (QCandidates) candidatesIterator.current();
snapshots.add(candidates.executeSnapshot(executionPath));
}
Iterator4 snapshotsIterator = snapshots.iterator();
final CompositeIterator4 resultingIDs = new CompositeIterator4(snapshotsIterator);
if (!r.checkDuplicates) {
return resultingIDs;
}
return checkDuplicates(resultingIDs);
}
private boolean attachToExistingConstraints(
Collection4 newConstraintsCollector, Object obj, boolean onlyForPaths) {
boolean found = false;
final Iterator4 j = iterateConstraints();
while (j.moveNext()) {
QCon existingConstraint = (QCon) j.current();
final BooleanByRef removeExisting = new BooleanByRef(false);
if (!onlyForPaths || (existingConstraint instanceof QConPath)) {
QCon newConstraint = existingConstraint.shareParent(obj, removeExisting);
if (newConstraint != null) {
newConstraintsCollector.add(newConstraint);
addConstraint(newConstraint);
if (removeExisting.value) {
removeConstraint(existingConstraint);
}
found = true;
if (!onlyForPaths) {
break;
}
}
}
}
return found;
}
private Constraint addInterfaceConstraint(ReflectClass claxx) {
Collection4 classes = stream().classCollection().forInterface(claxx);
if (classes.size() == 0) {
QConClass qcc = new QConClass(_trans, null, null, claxx);
addConstraint(qcc);
return qcc;
}
Iterator4 i = classes.iterator();
Constraint constr = null;
while (i.moveNext()) {
ClassMetadata classMetadata = (ClassMetadata) i.current();
ReflectClass classMetadataClaxx = classMetadata.classReflector();
if (classMetadataClaxx != null) {
if (!classMetadataClaxx.isInterface()) {
if (constr == null) {
constr = constrain(classMetadataClaxx);
} else {
constr = constr.or(constrain(classMetadata.classReflector()));
}
}
}
}
return constr;
}
public Object current() {
if (_delegate == null) {
return _array[_currentElement];
}
return _delegate.current();
}
private boolean descend1(final QQuery query, final String fieldName, IntByRef run) {
if (run.value == 2 || i_constraints.size() == 0) {
// On the second run we are really creating a second independant
// query network that is not joined to other higher level
// constraints.
// Let's see how this works out. We may need to join networks.
run.value = 0; // prevent a double run of this code
stream()
.classCollection()
.attachQueryNode(
fieldName,
new Visitor4() {
boolean untypedFieldConstraintCollected = false;
public void visit(Object obj) {
Object[] pair = ((Object[]) obj);
ClassMetadata containingClass = (ClassMetadata) pair[0];
FieldMetadata field = (FieldMetadata) pair[1];
if (isTyped(field)) {
addFieldConstraint(containingClass, field);
return;
}
if (untypedFieldConstraintCollected) return;
addFieldConstraint(containingClass, field);
untypedFieldConstraintCollected = true;
}
private boolean isTyped(FieldMetadata field) {
return !Handlers4.isUntyped(field.getHandler());
}
private void addFieldConstraint(
ClassMetadata containingClass, FieldMetadata field) {
QConClass qcc =
new QConClass(
_trans, null, field.qField(_trans), containingClass.classReflector());
addConstraint(qcc);
toConstraint(i_constraints).or(qcc);
}
});
}
checkConstraintsEvaluationMode();
final BooleanByRef foundClass = new BooleanByRef(false);
Iterator4 i = iterateConstraints();
while (i.moveNext()) {
if (((QCon) i.current()).attach(query, fieldName)) {
foundClass.value = true;
}
}
return foundClass.value;
}
public void executeLocal(final IdListQueryResult result) {
checkConstraintsEvaluationMode();
CreateCandidateCollectionResult r = createCandidateCollection();
boolean checkDuplicates = r.checkDuplicates;
boolean topLevel = r.topLevel;
List4 candidateCollection = r.candidateCollection;
if (Debug4.queries) {
logConstraints();
}
if (candidateCollection != null) {
final Collection4 executionPath = topLevel ? null : fieldPathFromTop();
Iterator4 i = new Iterator4Impl(candidateCollection);
while (i.moveNext()) {
((QCandidates) i.current()).execute();
}
if (candidateCollection._next != null) {
checkDuplicates = true;
}
if (checkDuplicates) {
result.checkDuplicates();
}
final ObjectContainerBase stream = stream();
i = new Iterator4Impl(candidateCollection);
while (i.moveNext()) {
QCandidates candidates = (QCandidates) i.current();
if (topLevel) {
candidates.traverse(result);
} else {
candidates.traverse(
new Visitor4() {
public void visit(Object a_object) {
QCandidate candidate = (QCandidate) a_object;
if (candidate.include()) {
TreeInt ids = new TreeInt(candidate._key);
final ByRef<TreeInt> idsNew = new ByRef<TreeInt>();
Iterator4 itPath = executionPath.iterator();
while (itPath.moveNext()) {
idsNew.value = null;
final String fieldName = (String) (itPath.current());
if (ids != null) {
ids.traverse(
new Visitor4() {
public void visit(Object treeInt) {
int id = ((TreeInt) treeInt)._key;
StatefulBuffer reader = stream.readStatefulBufferById(_trans, id);
if (reader != null) {
ObjectHeader oh = new ObjectHeader(stream, reader);
CollectIdContext context =
new CollectIdContext(_trans, oh, reader);
oh.classMetadata().collectIDs(context, fieldName);
Tree.traverse(
context.ids(),
new Visitor4<TreeInt>() {
public void visit(TreeInt node) {
idsNew.value = TreeInt.add(idsNew.value, node._key);
}
});
}
}
});
}
ids = (TreeInt) idsNew.value;
}
if (ids != null) {
ids.traverse(
new Visitor4() {
public void visit(Object treeInt) {
result.addKeyCheckDuplicates(((TreeInt) treeInt)._key);
}
});
}
}
}
});
}
}
}
sort(result);
}
public void checkConstraintsEvaluationMode() {
Iterator4 constraints = iterateConstraints();
while (constraints.moveNext()) {
((QConObject) constraints.current()).setEvaluationMode();
}
}