Package mondrian.rolap.agg

Class AggregationKey

java.lang.Object

mondrian.rolap.agg.AggregationKey

public class AggregationKey
extends Object

Column context that an Aggregation is computed for.

Column context has two components:

• The column constraints which define the dimentionality of an Aggregation
• An orthogonal context for which the measures are defined. This context is sometimes referred to as the compound member predicates, and usually of the shape:

  OR(AND(column predicates))

Any column is only used in either column context or compound context, not both.

Author:

Rushan Chen

Field Summary

Fields

Modifier and Type	Field	Description
(package private) List<StarPredicate>	compoundPredicateList	List of StarPredicate (representing the predicate defining the compound member).

Constructor Summary

Constructors

Constructor	Description
AggregationKey(CellRequest request)	Creates an AggregationKey.

Method Summary

Modifier and Type	Method	Description
int	computeHashCode()
static int	computeHashCode(BitKey constrainedColumnsBitKey, RolapStar star, Collection<BitKey> compoundPredicateBitKeys)
(package private) static boolean	equal(List<StarPredicate> list1, List<StarPredicate> list2)	Returns whether two lists of compound predicates are equal.
boolean	equals(Object other)
List<StarPredicate>	getCompoundPredicateList()	Returns the list of compound predicates.
BitKey	getConstrainedColumnsBitKey()	Returns the bitkey of columns that constrain this aggregation.
RolapStar	getStar()	Returns the star.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

compoundPredicateList

final List<StarPredicate> compoundPredicateList

List of StarPredicate (representing the predicate defining the compound member).

In sorted order of BitKey. This ensures that the map is deternimistic (otherwise different runs generate SQL statements in different orders), and speeds up comparison.

Constructor Detail

AggregationKey

public AggregationKey(CellRequest request)

Creates an AggregationKey.

Parameters:

request - Cell request

Method Detail

computeHashCode

public final int computeHashCode()

computeHashCode

public static int computeHashCode(BitKey constrainedColumnsBitKey,
                                  RolapStar star,
                                  Collection<BitKey> compoundPredicateBitKeys)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object

equal

static boolean equal(List<StarPredicate> list1,
                     List<StarPredicate> list2)

Returns whether two lists of compound predicates are equal.

Parameters:

list1 - First compound predicate map

list2 - Second compound predicate map

Returns:

Whether compound predicate maps are equal

toString

public String toString()

Overrides:

toString in class Object

getConstrainedColumnsBitKey

public final BitKey getConstrainedColumnsBitKey()

Returns the bitkey of columns that constrain this aggregation.

Returns:

Bitkey of contraining columns

getStar

public final RolapStar getStar()

Returns the star.

Returns:

Star

getCompoundPredicateList

public List<StarPredicate> getCompoundPredicateList()

Returns the list of compound predicates.

Returns:

list of predicates