mondrian.rolap

Interface StarPredicate

All Known Subinterfaces:

StarColumnPredicate

All Known Implementing Classes:

AbstractColumnPredicate, AndPredicate, ListColumnPredicate, ListPredicate, LiteralStarPredicate, MemberColumnPredicate, MemberTuplePredicate, MinusStarPredicate, OrPredicate, RangeColumnPredicate, ValueColumnPredicate

public interface StarPredicate

Condition which constrains a set of values of a single RolapStar.Column or a set of columns.

For example, the predicate Range([Time].[1997].[Q3], [Time].[1998].[Q2]) constrains the year and quarter columns:

((year = 1997 and quarter >= 'Q3')
or (year > 1997))
and ((year = 1998 and quarter <= 'Q2')
or (year < 1998))

Since:

Jan 15, 2007

Author:

jhyde

Field Summary

Fields

Modifier and Type	Field and Description
static Object	WILDCARD Wildcard value for evaluate(java.util.List).

Method Summary

Modifier and Type	Method and Description
StarPredicate	and(StarPredicate predicate) Returns this intersection of this Predicate with another.
void	describe(StringBuilder buf) Appends a description of this predicate to a StringBuilder.
boolean	equalConstraint(StarPredicate that) Returns whether this Predicate has the same constraining effect as the other constraint.
boolean	evaluate(List<Object> valueList) Evaluates a constraint against a list of values.
BitKey	getConstrainedColumnBitKey() Returns a bitmap of constrained columns to speed up comparison
List<RolapStar.Column>	getConstrainedColumnList() Returns a list of constrained columns.
StarPredicate	minus(StarPredicate predicate) Returns the logical inverse of this Predicate.
StarPredicate	or(StarPredicate predicate) Returns this union of this Predicate with another.
void	toSql(SqlQuery sqlQuery, StringBuilder buf)

Field Detail

WILDCARD

static final Object WILDCARD

Wildcard value for evaluate(java.util.List).

Method Detail

getConstrainedColumnList

List<RolapStar.Column> getConstrainedColumnList()

Returns a list of constrained columns.

Returns:

List of constrained columns

getConstrainedColumnBitKey

BitKey getConstrainedColumnBitKey()

Returns a bitmap of constrained columns to speed up comparison

Returns:

bitmap representing all constraining columns.

describe

void describe(StringBuilder buf)

Appends a description of this predicate to a StringBuilder. For example:

• =any
• =5
• in (2, 4, 6)

Parameters:

buf - Builder to append to

evaluate

boolean evaluate(List<Object> valueList)

Evaluates a constraint against a list of values.

If one of the values is WILDCARD, returns true if constraint is true for all possible values of that column.

Parameters:

valueList - List of values, one for each constrained column

Returns:

Whether constraint holds for given set of values

equalConstraint

boolean equalConstraint(StarPredicate that)

Returns whether this Predicate has the same constraining effect as the other constraint. This is weaker than Object.equals(Object): it is possible for two different members to constrain the same column in the same way.

Parameters:

that - Other predicate

Returns:

whether the other predicate is equivalent

minus

StarPredicate minus(StarPredicate predicate)

Returns the logical inverse of this Predicate. The result is a Predicate which holds whenever this predicate holds but the other does not.

Parameters:

predicate - Predicate

Returns:

Combined predicate

Pre-condition:

predicate != null

or

StarPredicate or(StarPredicate predicate)

Returns this union of this Predicate with another. The result is a Predicate which holds whenever either predicate holds.

Parameters:

predicate - Predicate

Returns:

Combined predicate

Pre-condition:

predicate != null

and

StarPredicate and(StarPredicate predicate)

Returns this intersection of this Predicate with another. The result is a Predicate which holds whenever both predicates hold.

Parameters:

predicate - Predicate

Returns:

Combined predicate

Pre-condition:

predicate != null

toSql

void toSql(SqlQuery sqlQuery,
           StringBuilder buf)