mondrian.rolap
Class RolapEvaluatorRoot

java.lang.Object
  mondrian.rolap.RolapEvaluatorRoot

Direct Known Subclasses:

RolapResult.RolapResultEvaluatorRoot

 class RolapEvaluatorRoot
extends java.lang.Object

Context at the root of a tree of evaluators.

Contains the context that does not change as evaluation context is pushed/popped.

Since:

Nov 11, 2008

Version:

$Id: //open/mondrian/src/main/mondrian/rolap/RolapEvaluatorRoot.java#7 $

Author:

jhyde

Field Summary

(package private) java.util.Map<java.util.List<java.lang.Object>,Calc>	compiledExps
(package private) RolapConnection	connection
(package private) RolapCube	cube
(package private) Dialect	currentDialect
(package private) RolapMember[]	defaultMembers Default members of each hierarchy, from the schema reader's perspective.
(package private) java.util.Map<java.lang.Object,java.lang.Object>	expResultCache
(package private) Query	query
(package private) SchemaReader	schemaReader
(package private) MondrianProperties.SolveOrderModeEnum	solveOrderMode
(package private) java.util.Map<java.lang.Object,java.lang.Object>	tmpExpResultCache

Constructor Summary

RolapEvaluatorRoot(Query query)
Creates a RolapEvaluatorRoot.

Method Summary

void	clearResultCache(boolean clearValidResult) Clears the expression result cache.
protected Evaluator.NamedSetEvaluator	evaluateNamedSet(NamedSet namedSet, boolean create) Evaluates a named set.
java.lang.Object	getCacheResult(java.lang.Object key) Gets result from cache.
(package private) Calc	getCompiled(Exp exp, boolean scalar, ResultStyle resultStyle) Implements a cheap-and-cheerful mapping from expressions to compiled expressions.
java.lang.Object	getParameterValue(ParameterSlot slot) Returns the value of a parameter, evaluating its default expression if necessary.
java.util.Date	getQueryStartTime() Get query start time.
protected void	init(Evaluator evaluator) First evaluator calls this method on construction.
void	putCacheResult(java.lang.Object key, java.lang.Object result, boolean isValidResult) Puts result in cache.

Methods inherited from class java.lang.Object

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

Field Detail

expResultCache

final java.util.Map<java.lang.Object,java.lang.Object> expResultCache

tmpExpResultCache

final java.util.Map<java.lang.Object,java.lang.Object> tmpExpResultCache

cube

final RolapCube cube

connection

final RolapConnection connection

schemaReader

final SchemaReader schemaReader

compiledExps

final java.util.Map<java.util.List<java.lang.Object>,Calc> compiledExps

query

final Query query

currentDialect

final Dialect currentDialect

defaultMembers

final RolapMember[] defaultMembers

Default members of each hierarchy, from the schema reader's perspective. Finding the default member is moderately expensive, but happens very often.

solveOrderMode

final MondrianProperties.SolveOrderModeEnum solveOrderMode

Constructor Detail

RolapEvaluatorRoot

public RolapEvaluatorRoot(Query query)

Creates a RolapEvaluatorRoot.

Parameters:

query - Query

Method Detail

getCompiled

final Calc getCompiled(Exp exp,
                       boolean scalar,
                       ResultStyle resultStyle)

Implements a cheap-and-cheerful mapping from expressions to compiled expressions.

TODO: Save compiled expressions somewhere better.

Parameters:

exp - Expression

scalar - Whether expression is scalar

resultStyle - Preferred result style; if null, use query's default result style; ignored if expression is scalar

Returns:

compiled expression

evaluateNamedSet

protected Evaluator.NamedSetEvaluator evaluateNamedSet(NamedSet namedSet,
                                                       boolean create)

Evaluates a named set.

The default implementation throws UnsupportedOperationException.

Parameters:

namedSet - Named set

create - Whether to create named set evaluator if not found

init

protected void init(Evaluator evaluator)

First evaluator calls this method on construction.

getParameterValue

public java.lang.Object getParameterValue(ParameterSlot slot)

Returns the value of a parameter, evaluating its default expression if necessary.

The default implementation throws UnsupportedOperationException.

putCacheResult

public final void putCacheResult(java.lang.Object key,
                                 java.lang.Object result,
                                 boolean isValidResult)

Puts result in cache.

Parameters:

key - key

result - value to be cached

isValidResult - indicate if this result is valid

getCacheResult

public final java.lang.Object getCacheResult(java.lang.Object key)

Gets result from cache.

Parameters:

key - cache key

Returns:

cached expression

clearResultCache

public final void clearResultCache(boolean clearValidResult)

Clears the expression result cache.

Parameters:

clearValidResult - whether to clear valid expression results

getQueryStartTime

public java.util.Date getQueryStartTime()

Get query start time.

Returns:

the query start time