com.db4o.internal.query.processor

Class QCandidates

java.lang.Object

com.db4o.internal.query.processor.QCandidates

All Implemented Interfaces:

Visitor4

public final class QCandidates
extends java.lang.Object
implements Visitor4

Holds the tree of QCandidate objects and the list of QCon during query evaluation. The query work (adding and removing nodes) happens here. Candidates during query evaluation. QCandidate objects are stored in i_root

Field Summary

Fields

Modifier and Type	Field and Description
Tree	i_root
LocalTransaction	i_trans

Method Summary

Methods

Modifier and Type	Method and Description
QCandidate	add(QCandidate candidate)
int	classIndexEntryCount()
Iterator4	executeLazy(Collection4 executionPath)
Iterator4	executeSnapshot(Collection4 executionPath)
boolean	fitsIntoExistingConstraintHierarchy(QCon constraint)
Iterator4	iterateConstraints()
QCandidate	readSubCandidate(QueryingReadContext context, TypeHandler4 handler)
ObjectContainerBase	stream()
java.lang.String	toString()
Transaction	transaction()
void	visit(java.lang.Object a_tree)
boolean	wasLoadedFromClassIndex()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

i_trans

public final LocalTransaction i_trans

i_root

public Tree i_root

Method Detail

add

public QCandidate add(QCandidate candidate)

readSubCandidate

public QCandidate readSubCandidate(QueryingReadContext context,
                          TypeHandler4 handler)

executeSnapshot

public Iterator4 executeSnapshot(Collection4 executionPath)

executeLazy

public Iterator4 executeLazy(Collection4 executionPath)

stream

public ObjectContainerBase stream()

classIndexEntryCount

public int classIndexEntryCount()

iterateConstraints

public Iterator4 iterateConstraints()

visit

public void visit(java.lang.Object a_tree)

Specified by:

visit in interface Visitor4

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

transaction

public final Transaction transaction()

wasLoadedFromClassIndex

public boolean wasLoadedFromClassIndex()

fitsIntoExistingConstraintHierarchy

public boolean fitsIntoExistingConstraintHierarchy(QCon constraint)