mondrian.rolap
Class DefaultMemberChildrenConstraint

java.lang.Object
  mondrian.rolap.DefaultMemberChildrenConstraint

All Implemented Interfaces:

MemberChildrenConstraint, SqlConstraint

Direct Known Subclasses:

ChildByNameConstraint

public class DefaultMemberChildrenConstraint
extends Object
implements MemberChildrenConstraint

Restricts the SQL result set to the parent member of a MemberChildren query. If called with a calculated member an exception will be thrown.

Constructor Summary

protected

DefaultMemberChildrenConstraint()

Method Summary

void	addLevelConstraint(SqlQuery query, RolapCube baseCube, AggStar aggStar, RolapLevel level) Will be called once for the level that contains the children of a Member.Children query.
void	addMemberConstraint(SqlQuery sqlQuery, RolapCube baseCube, AggStar aggStar, List<RolapMember> parents) Modifies a Member.Children query so that (all or some) children of all parent members contained in parents will be returned in the result set.
void	addMemberConstraint(SqlQuery sqlQuery, RolapCube baseCube, AggStar aggStar, RolapMember parent) Modifies a Member.Children query so that only the children of parent will be returned in the result set.
Object	getCacheKey() Returns a key that becomes part of the key for caching the result of the SQL query.
static MemberChildrenConstraint	instance()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultMemberChildrenConstraint

protected DefaultMemberChildrenConstraint()

Method Detail

addMemberConstraint

public void addMemberConstraint(SqlQuery sqlQuery,
                                RolapCube baseCube,
                                AggStar aggStar,
                                RolapMember parent)

Description copied from interface: MemberChildrenConstraint

Modifies a Member.Children query so that only the children of parent will be returned in the result set.

Specified by:

addMemberConstraint in interface MemberChildrenConstraint

Parameters:

sqlQuery - the query to modify

baseCube - base cube for virtual members

aggStar - Aggregate star, if we are reading from an aggregate table,

parent - the parent member that restricts the returned children

addMemberConstraint

public void addMemberConstraint(SqlQuery sqlQuery,
                                RolapCube baseCube,
                                AggStar aggStar,
                                List<RolapMember> parents)

Description copied from interface: MemberChildrenConstraint

Modifies a Member.Children query so that (all or some) children of all parent members contained in parents will be returned in the result set.

Specified by:

addMemberConstraint in interface MemberChildrenConstraint

Parameters:

sqlQuery - Query to modify

baseCube - Base cube for virtual members

aggStar - Aggregate table, or null if query is against fact table

parents - List of parent members that restrict the returned children

addLevelConstraint

public void addLevelConstraint(SqlQuery query,
                               RolapCube baseCube,
                               AggStar aggStar,
                               RolapLevel level)

Description copied from interface: MemberChildrenConstraint

Will be called once for the level that contains the children of a Member.Children query. If the condition requires so, it may join the levels table to the fact table.

Specified by:

addLevelConstraint in interface MemberChildrenConstraint

Parameters:

query - the query to modify

baseCube - base cube for virtual members

aggStar - Aggregate table, or null if query is against fact table

level - the level that contains the children

toString

public String toString()

Overrides:

toString in class Object

getCacheKey

public Object getCacheKey()

Description copied from interface: SqlConstraint

Returns a key that becomes part of the key for caching the result of the SQL query. So SqlConstraint instances that produce the same SQL resultset must return equal keys in terms of equal() and hashCode().

Specified by:

getCacheKey in interface SqlConstraint

Returns:

valid key or null to prevent the result from being cached

instance

public static MemberChildrenConstraint instance()