mondrian.rolap

Class SqlConstraintFactory

java.lang.Object

mondrian.rolap.SqlConstraintFactory

public class SqlConstraintFactory
extends Object

Creates the right constraint for common tasks.

Since:

Nov 21, 2005

Author:

av

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static boolean	enabled

Method Summary

Methods

Modifier and Type	Method and Description
MemberChildrenConstraint	getChildByNameConstraint(RolapMember parent, Id.NameSegment childName)
TupleConstraint	getDescendantsConstraint(List<RolapMember> parentMembers, MemberChildrenConstraint mcc) Returns a constraint that allows to read all children of multiple parents at once using a LevelMember query style.
TupleConstraint	getLevelMembersConstraint(Evaluator context)
TupleConstraint	getLevelMembersConstraint(Evaluator context, Level[] levels) Returns a constraint that restricts the members of a level to those that are non-empty in the given context.
MemberChildrenConstraint	getMemberChildrenConstraint(Evaluator context)
static SqlConstraintFactory	instance()
static void	setNativeNonEmptyValue()

Methods inherited from class java.lang.Object

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

Field Detail

enabled

static boolean enabled

Method Detail

instance

public static SqlConstraintFactory instance()

setNativeNonEmptyValue

public static void setNativeNonEmptyValue()

getMemberChildrenConstraint

public MemberChildrenConstraint getMemberChildrenConstraint(Evaluator context)

getLevelMembersConstraint

public TupleConstraint getLevelMembersConstraint(Evaluator context)

getLevelMembersConstraint

public TupleConstraint getLevelMembersConstraint(Evaluator context,
                                        Level[] levels)

Returns a constraint that restricts the members of a level to those that are non-empty in the given context. If the constraint cannot be implemented (say if native constraints are disabled) returns null.

Parameters:

context - Context within which members must be non-empty

levels - levels being referenced in the current context

Returns:

Constraint

getChildByNameConstraint

public MemberChildrenConstraint getChildByNameConstraint(RolapMember parent,
                                                Id.NameSegment childName)

getDescendantsConstraint

public TupleConstraint getDescendantsConstraint(List<RolapMember> parentMembers,
                                       MemberChildrenConstraint mcc)

Returns a constraint that allows to read all children of multiple parents at once using a LevelMember query style. This does not work for parent/child hierarchies.

Parameters:

parentMembers - List of parents (all must belong to same level)

mcc - The constraint that would return the children for each single parent

Returns:

constraint