mondrian.rolap
Class HighCardSqlTupleReader

java.lang.Object
  mondrian.rolap.SqlTupleReader
      mondrian.rolap.HighCardSqlTupleReader

All Implemented Interfaces:

TupleReader

public class HighCardSqlTupleReader
extends SqlTupleReader

Reads the members of a single level (level.members) or of multiple levels (crossjoin).

Since:

Dec, 2007

Author:

luis f. canals

Nested Class Summary

Nested classes/interfaces inherited from class mondrian.rolap.SqlTupleReader

SqlTupleReader.WhichSelect

Nested classes/interfaces inherited from interface mondrian.rolap.TupleReader

TupleReader.MemberBuilder

Field Summary

(package private) int

maxRows

Fields inherited from class mondrian.rolap.SqlTupleReader

constraint, targets

Constructor Summary

HighCardSqlTupleReader(TupleConstraint constraint)

Method Summary

void	addLevelMembers(RolapLevel level, TupleReader.MemberBuilder memberBuilder, List<RolapMember> srcMembers) Adds a hierarchy to retrieve members from.
(package private) Collection<RolapCube>	getBaseCubeCollection(Query query)
int	getMaxRows()
protected void	prepareTuples(DataSource dataSource, TupleList partialResult, List<List<RolapMember>> newPartialResult)
TupleList	readMembers(DataSource dataSource, TupleList partialResult, List<List<RolapMember>> newPartialResult) Performs the read.
boolean	readNextTuple() Reads next tuple notifing all internal targets.
TupleList	readTuples(DataSource jdbcConnection, TupleList partialResult, List<List<RolapMember>> newPartialResult) Performs the read.
void	setMaxRows(int maxRows)

Methods inherited from class mondrian.rolap.SqlTupleReader

addLevelMemberSql, chooseAggStar, generateSelectForLevels, getCacheKey, getEnumTargetCount, getEvaluator, makeLevelMembersSql, sqlForEmptyTuple, targetIsOnBaseCube

Methods inherited from class java.lang.Object

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

Field Detail

maxRows

int maxRows

Constructor Detail

HighCardSqlTupleReader

public HighCardSqlTupleReader(TupleConstraint constraint)

Method Detail

addLevelMembers

public void addLevelMembers(RolapLevel level,
                            TupleReader.MemberBuilder memberBuilder,
                            List<RolapMember> srcMembers)

Description copied from interface: TupleReader

Adds a hierarchy to retrieve members from.

Specified by:

addLevelMembers in interface TupleReader

Overrides:

addLevelMembers in class SqlTupleReader

Parameters:

level - level that the members correspond to

memberBuilder - used to build new members for this level

srcMembers - if set, array of enumerated members that make up this level

prepareTuples

protected void prepareTuples(DataSource dataSource,
                             TupleList partialResult,
                             List<List<RolapMember>> newPartialResult)

Overrides:

prepareTuples in class SqlTupleReader

readMembers

public TupleList readMembers(DataSource dataSource,
                             TupleList partialResult,
                             List<List<RolapMember>> newPartialResult)

Description copied from interface: TupleReader

Performs the read.

Specified by:

readMembers in interface TupleReader

Overrides:

readMembers in class SqlTupleReader

Parameters:

dataSource - source for reading tuples

partialResult - partially cached result that should be used instead of executing sql query

newPartialResult - if non-null, return the result of the read; note that this is a subset of the full return list

Returns:

a list of RolapMember

readTuples

public TupleList readTuples(DataSource jdbcConnection,
                            TupleList partialResult,
                            List<List<RolapMember>> newPartialResult)

Description copied from interface: TupleReader

Performs the read.

Specified by:

readTuples in interface TupleReader

Overrides:

readTuples in class SqlTupleReader

Parameters:

jdbcConnection - Data source

partialResult - List of rows from previous pass

newPartialResult - Populated with a new list of rows

Returns:

a list of tuples

readNextTuple

public boolean readNextTuple()

Reads next tuple notifing all internal targets.

Returns:

whether there are any more rows

setMaxRows

public void setMaxRows(int maxRows)

Overrides:

setMaxRows in class SqlTupleReader

getMaxRows

public int getMaxRows()

Overrides:

getMaxRows in class SqlTupleReader

getBaseCubeCollection

Collection<RolapCube> getBaseCubeCollection(Query query)

Overrides:

getBaseCubeCollection in class SqlTupleReader