mondrian.calc

Interface TupleList

All Superinterfaces:

Collection<List<Member>>, Iterable<List<Member>>, List<List<Member>>, TupleIterable

All Known Implementing Classes:

AbstractTupleList, ArrayTupleList, DelegatingTupleList, ListTupleList, UnaryTupleList

public interface TupleList
extends List<List<Member>>, TupleIterable

List of tuples.

Design notes

• Consider changing TupleCalc.evaluateTuple(mondrian.olap.Evaluator) and Evaluator.NamedSetEvaluator.currentTuple() to List<Member>
• Search for potential uses of get(int, int)
• Worth creating TupleList.addAll(TupleIterator)?

Author:

jhyde

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	TupleList.PositionCallback

Method Summary

Modifier and Type	Method and Description
void	addCurrent(TupleCursor tupleIter)
void	addTuple(Member... members)
TupleList	cloneList(int capacity) Creates a copy of this list that has the same type and has a given capacity.
TupleList	fix() Fixes the tuples of this list, so that their contents will not change even if elements of the list are reordered or removed.
Member	get(int slice, int index) Returns a particular column of a particular row.
TupleList	project(int[] destIndices)
List<Member>	slice(int column) Returns a list of the members at a given column.
TupleList	subList(int fromIndex, int toIndex)
TupleList	withPositionCallback(TupleList.PositionCallback positionCallback)

Methods inherited from interface java.util.List

add, add, addAll, addAll, clear, contains, containsAll, equals, get, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, replaceAll, retainAll, set, size, sort, spliterator, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface mondrian.calc.TupleIterable

getArity, tupleCursor, tupleIterator

Method Detail

get

Member get(int slice,
           int index)

Returns a particular column of a particular row.

Note that list.get(row, column) is equivalent to list.slice(column).get(row) and list.get(row).get(column) but is more efficient for most implementations of TupleList.

Parameters:

slice - Column ordinal

index - Row ordinal

Returns:

Member at given row and column

slice

List<Member> slice(int column)

Returns a list of the members at a given column.

The list is modifiable if and only if this TupleList is modifiable. Adding an element to a slice will create a tuple whose members in other columns are null. Removing an element from a slicer will remove a tuple.

Specified by:

slice in interface TupleIterable

Parameters:

column - Ordinal of the member in each tuple to project

Returns:

List of members

Throws:

IllegalArgumentException - if column is not less than arity

cloneList

TupleList cloneList(int capacity)

Creates a copy of this list that has the same type and has a given capacity.

If capacity is negative, populates the list. A deep copy is made, so that it the contents of the list are not affected to changes to any backing collections.

Parameters:

capacity - Capacity

Returns:

Copy of list, empty if capacity is non-negative

addTuple

void addTuple(Member... members)

project

TupleList project(int[] destIndices)

addCurrent

void addCurrent(TupleCursor tupleIter)

subList

TupleList subList(int fromIndex,
                  int toIndex)

Specified by:

subList in interface List<List<Member>>

withPositionCallback

TupleList withPositionCallback(TupleList.PositionCallback positionCallback)

fix

TupleList fix()

Fixes the tuples of this list, so that their contents will not change even if elements of the list are reordered or removed. Returns this list if possible.

Returns:

List whose tuples are invariant if the list is sorted or filtered