RolapEvaluator (Pentaho Community Edition Project: mondrian 8.0.0.0-6 API)

java.lang.Object
- mondrian.rolap.RolapEvaluator

All Implemented Interfaces:

Evaluator

Direct Known Subclasses:

RolapDependencyTestingEvaluator, RolapProfilingEvaluator
```
public class RolapEvaluator
extends Object
implements Evaluator
```
RolapEvaluator evaluates expressions in a dimensional environment.
The context contains a member (which may be the default member) for every dimension in the current cube. Certain operations, such as evaluating a calculated member or a tuple, change the current context.
There are two ways of preserving context.
First, the push(mondrian.olap.Member[]) method creates a verbatim copy of the evaluator. Use that copy for computations, and any changes of state will be made only to the copy.
Second, the savepoint() method tells the evaluator to create a checkpoint of its state, and returns an int value that can later be passed to restore(int).
The savepoint method is recommended for most purposes, because the initial checkpoint is extremely cheap. Each call that modifies state (such as Evaluator.setContext(mondrian.olap.Member)) creates, at a modest cost, an entry on an internal command stack.
One occasion that you would use push is when creating an iterator, and the iterator needs its own evaluator context, even if the code that created the iterator later reverts the context. In this case, the iterator's constructor should call push.
Developers note

Many of the methods in this class are performance-critical. Where possible they are declared 'final' so that the JVM can optimize calls to these methods. If future functionality requires it, the 'final' modifier can be removed and these methods can be overridden.

Since:

10 August, 2001

Author:

jhyde

Nested Class Summary
- Nested classes/interfaces inherited from interface mondrian.olap.Evaluator
  Evaluator.NamedSetEvaluator, Evaluator.SetEvaluator

Field Summary

Fields
Modifier and Type	Field and Description
`protected List<List<List<Member>>>`	`aggregationLists` List of lists of tuples or members, rarely used, but overrides the ordinary dimensional context if set when a cell value comes to be evaluated.
`protected mondrian.rolap.CellReader`	`cellReader`
`protected mondrian.rolap.RolapEvaluatorRoot`	`root`
`protected CompoundPredicateInfo`	`slicerPredicateInfo`

Constructor Summary

Constructors
Modifier	Constructor and Description
	`RolapEvaluator(mondrian.rolap.RolapEvaluatorRoot root)` Creates a root evaluator.
`protected`	`RolapEvaluator(mondrian.rolap.RolapEvaluatorRoot root, RolapEvaluator parent, List<List<Member>> aggregationList)` Creates a non-root evaluator.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`protected RolapEvaluator`	`_push(List<List<Member>> aggregationList)` Creates a clone of the current validator.
`void`	`clearExpResultCache(boolean clearValidResult)`
`static Evaluator`	`create(Statement statement)` Creates an evaluator.
`boolean`	`currentIsEmpty()` Returns whether the current context is an empty cell.
`boolean`	`equals(Object obj)` Returns true if the other object is a `RolapEvaluator` with identical context.
`Object`	`evaluateCurrent()` Calculates and returns the value of the cell at the current context.
`String`	`format(Object o)` Formats a value as a string according to the current context's format.
`String`	`format(Object o, String formatString)` Formats a value as a string according to the current context's format, using a given format string.
`Set<Exp>`	`getActiveNativeExpansions()` Set of expressions actively being expanded.
`List<List<List<Member>>>`	`getAggregationLists()`
`Object`	`getCachedResult(ExpCacheDescriptor cacheDescriptor)` Simple caching of the result of an `Exp`.
`Locale`	`getConnectionLocale()` Returns the connection's locale.
`RolapMember`	`getContext(Hierarchy hierarchy)`
`RolapMember`	`getContext(RolapHierarchy hierarchy)` More specific version of `getContext(mondrian.olap.Hierarchy)`, for internal code.
`RolapCube`	`getCube()` Returns the current cube.
`int`	`getDepth()` Obsolete method.
`Dialect`	`getDialect()`
`String`	`getFormatString()` Returns the format string for this cell.
`int`	`getIterationLength()`
`protected org.apache.log4j.Logger`	`getLogger()`
`RolapCube`	`getMeasureCube()` Returns the base (non-virtual) cube that the current measure in the context belongs to.
`Member[]`	`getMembers()` Returns an array of the members which make up the current context.
`int`	`getMissCount()` Returns the number of times that this evaluator has told a lie when retrieving cell values.
`Evaluator.NamedSetEvaluator`	`getNamedSetEvaluator(NamedSet namedSet, boolean create)` Returns an evaluator for a named set.
`Member[]`	`getNonAllMembers()` Returns an array of the non-All members which make up the current context.
`TupleList`	`getOptimizedSlicerTuples(RolapCube baseCube)` Returns an optimized list of tuples related to the slicer based on the current evaluator.
`Object`	`getParameterValue(ParameterSlot slot)` Returns the value of a parameter, evaluating its default value if it is not set.
`RolapEvaluator`	`getParent()` Returns parent evaluator.
`Member`	`getPreviousContext(Hierarchy hierarchy)` Returns the member that was the current evaluation context for a particular hierarchy before the most recent change in context.
`Object`	`getProperty(String name, Object defaultValue)` Retrieves the value of property `name`.
`Query`	`getQuery()` Returns the current query.
`Date`	`getQueryStartTime()` Returns the start time of the current query.
`SchemaReader`	`getSchemaReader()` Returns a `SchemaReader` appropriate for the current access-control context.
`Evaluator.SetEvaluator`	`getSetEvaluator(Exp exp, boolean create)` Returns an evaluator for a set.
`List<Member>`	`getSlicerMembers()` Return the list of slicer members in the current evaluator context.
`CompoundPredicateInfo`	`getSlicerPredicateInfo()`
`TupleList`	`getSlicerTuples()` Return the list of compound slicer tuples
`QueryTiming`	`getTiming()` Returns the query timing context for this execution.
`int`	`hashCode()`
`boolean`	`isDisjointSlicerTuple()`
`boolean`	`isEvalAxes()`
`boolean`	`isMultiLevelSlicerTuple()`
`boolean`	`isNonEmpty()` Returns true for an axis that is NON EMPTY.
`boolean`	`mightReturnNullForUnrelatedDimension()` Returns whether it is necessary to check whether to return null for an unrelated dimension.
`boolean`	`nativeEnabled()` Returns whether native evaluation is enabled in this context.
`boolean`	`needToReturnNullForUnrelatedDimension(Member[] members)` If IgnoreMeasureForNonJoiningDimension is set to true and one or more members are on unrelated dimension for the measure in current context then returns true.
`RuntimeException`	`newEvalException(Object context, String s)` Creates an exception which indicates that an error has occurred during the runtime evaluation of a function.
`RolapEvaluator`	`push()` Creates a new Evaluator with the same context as this evaluator.
`Evaluator`	`push(boolean nonEmpty)` Creates a new evaluator with the same state except nonEmpty property
`Evaluator`	`push(boolean nonEmpty, boolean nativeEnabled)` Creates a new evaluator with the same state except nonEmpty and nativeEnabled properties.
`RolapEvaluator`	`push(Member member)` Creates a new Evaluator with the same context except for one member.
`RolapEvaluator`	`push(Member[] members)` Creates a new Evaluator with each given member overriding the context of the current Evaluator for its hierarchy.
`Evaluator`	`pushAggregation(List<List<Member>> list)` Returns a new Aggregator whose aggregation context adds a given list of tuples, and whose evaluation context is the same as this Aggregator.
`void`	`restore(int savepoint)` Restores previous evaluator.
`int`	`savepoint()` Creates a savepoint encapsulating the current state of the evalutor.
`void`	`setContext(List<Member> memberList)` Sets the context to a list of members.
`void`	`setContext(List<Member> memberList, boolean safe)` Sets the context to a list of members, optionally skipping the check whether it is necessary to store the previous member of each hierarchy.
`Member`	`setContext(Member member)` Makes `member` the current member of its hierarchy.
`void`	`setContext(Member[] members)` Sets the context to an array of members.
`void`	`setContext(Member[] members, boolean safe)` Sets the context to an array of members, optionally skipping the check whether it is necessary to store the previous member of each hierarchy.
`void`	`setContext(Member member, boolean safe)` Makes `member` the current member of its hierarchy.
`void`	`setEvalAxes(boolean evalAxes)` Indicate whether the evaluator is evaluating the axes
`void`	`setIterationLength(int iterationLength)` Sets the iteration length for the current evaluator context
`void`	`setNativeEnabled(boolean nativeEnabled)` Sets whether native evaluation should be used.
`void`	`setNonEmpty(boolean nonEmpty)` Sets whether an expression evaluation should filter out empty cells.
`void`	`setSlicerContext(Member member)` Adds a slicer member to the evaluator context, and remember it as part of the slicer.
`void`	`setSlicerTuples(TupleList tuples)` Sets the slicer tuple object, used later by native evaluation and non-empty crossjoins.
`boolean`	`shouldIgnoreUnrelatedDimensions()` Checks if unrelated dimensions to the measure in the current context should be ignored.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - cellReader
```
protected mondrian.rolap.CellReader cellReader
```
  - root
```
protected final mondrian.rolap.RolapEvaluatorRoot root
```
  - aggregationLists
```
protected final List<List<List<Member>>> aggregationLists
```
    List of lists of tuples or members, rarely used, but overrides the ordinary dimensional context if set when a cell value comes to be evaluated.
  - slicerPredicateInfo
```
protected CompoundPredicateInfo slicerPredicateInfo
```
- Constructor Detail
  - RolapEvaluator
```
protected RolapEvaluator(mondrian.rolap.RolapEvaluatorRoot root,
                         RolapEvaluator parent,
                         List<List<Member>> aggregationList)
```
    Creates a non-root evaluator.
    
    Parameters:
    
    root - Root context for stack of evaluators (contains information which does not change during the evaluation)
    
    parent - Parent evaluator, not null
    
    aggregationList - List of tuples to add to aggregation context, or null
  - RolapEvaluator
```
public RolapEvaluator(mondrian.rolap.RolapEvaluatorRoot root)
```
    Creates a root evaluator.
    
    Parameters:
    
    root - Shared context between this evaluator and its children
- Method Detail
  - getActiveNativeExpansions
```
public Set<Exp> getActiveNativeExpansions()
```
    Set of expressions actively being expanded. Prevents infinite cycle of expansions.
    
    Returns:
    
    Mutable set of expressions being expanded
  - getSlicerPredicateInfo
```
public CompoundPredicateInfo getSlicerPredicateInfo()
```
  - create
```
public static Evaluator create(Statement statement)
```
    Creates an evaluator.
  - getMeasureCube
```
public RolapCube getMeasureCube()
```
    Description copied from interface: Evaluator
    
    Returns the base (non-virtual) cube that the current measure in the context belongs to.
    
    Specified by:
    
    getMeasureCube in interface Evaluator
    
    Returns:
    
    Cube
  - mightReturnNullForUnrelatedDimension
```
public boolean mightReturnNullForUnrelatedDimension()
```
    Description copied from interface: Evaluator
    
    Returns whether it is necessary to check whether to return null for an unrelated dimension. If false, we never need to check: we can assume that Evaluator.needToReturnNullForUnrelatedDimension(mondrian.olap.Member[]) will always return false.
    
    Specified by:
    
    mightReturnNullForUnrelatedDimension in interface Evaluator
    
    Returns:
    
    whether it is necessary to check whether to return null for an unrelated dimension
  - needToReturnNullForUnrelatedDimension
```
public boolean needToReturnNullForUnrelatedDimension(Member[] members)
```
    Description copied from interface: Evaluator
    
    If IgnoreMeasureForNonJoiningDimension is set to true and one or more members are on unrelated dimension for the measure in current context then returns true.
    You must not call this method unless Evaluator.mightReturnNullForUnrelatedDimension() has returned true.
    
    Specified by:
    
    needToReturnNullForUnrelatedDimension in interface Evaluator
    
    Parameters:
    
    members - Dimensions for the members need to be checked whether related or unrelated
    
    Returns:
    
    boolean
  - nativeEnabled
```
public boolean nativeEnabled()
```
    Description copied from interface: Evaluator
    
    Returns whether native evaluation is enabled in this context.
    
    Specified by:
    
    nativeEnabled in interface Evaluator
    
    Returns:
    
    whether native evaluation is enabled in this context
  - currentIsEmpty
```
public boolean currentIsEmpty()
```
    Description copied from interface: Evaluator
    
    Returns whether the current context is an empty cell.
    
    Specified by:
    
    currentIsEmpty in interface Evaluator
    
    Returns:
    
    Whether the current context is an empty cell
  - getPreviousContext
```
public Member getPreviousContext(Hierarchy hierarchy)
```
    Description copied from interface: Evaluator
    
    Returns the member that was the current evaluation context for a particular hierarchy before the most recent change in context.
    
    Specified by:
    
    getPreviousContext in interface Evaluator
    
    Parameters:
    
    hierarchy - Hierarchy
    
    Returns:
    
    Previous context member for given hierarchy
  - getTiming
```
public final QueryTiming getTiming()
```
    Description copied from interface: Evaluator
    
    Returns the query timing context for this execution.
    
    Specified by:
    
    getTiming in interface Evaluator
    
    Returns:
    
    query timing context
  - savepoint
```
public final int savepoint()
```
    Description copied from interface: Evaluator
    
    Creates a savepoint encapsulating the current state of the evalutor. You can restore the evaluator to this state by calling Evaluator.restore(int) with the value returned by this method.
    This method is typically called before evaluating an expression which is known to corrupt the evaluation context.
    Multiple savepoints may be active at the same time for the same evaluator. And, it is allowable to restore to the save savepoint more than once (or not at all). However, when you have rolled back to a particular savepoint you may not restore to a later savepoint.
    
    Specified by:
    
    savepoint in interface Evaluator
    
    Returns:
    
    Evaluator with each given member overriding the state of the current Evaluator for its hierarchy
  - setNativeEnabled
```
public final void setNativeEnabled(boolean nativeEnabled)
```
    Description copied from interface: Evaluator
    
    Sets whether native evaluation should be used.
    
    Specified by:
    
    setNativeEnabled in interface Evaluator
    
    Parameters:
    
    nativeEnabled - Whether native evaluation should be used
  - getLogger
```
protected final org.apache.log4j.Logger getLogger()
```
  - getMembers
```
public final Member[] getMembers()
```
    Description copied from interface: Evaluator
    
    Returns an array of the members which make up the current context.
    
    Specified by:
    
    getMembers in interface Evaluator
  - getNonAllMembers
```
public final Member[] getNonAllMembers()
```
    Description copied from interface: Evaluator
    Returns an array of the non-All members which make up the current context.
    Notes:
    - The 0th element is a measure, but otherwise the order of the members is unspecified.
    - No hierarchy occurs more than once.
    - In rare circumstances, some of the members may be an 'All' member.
    - The list may contain calculated members.
    Specified by:
    
    getNonAllMembers in interface Evaluator
  - getAggregationLists
```
public final List<List<List<Member>>> getAggregationLists()
```
  - getCube
```
public final RolapCube getCube()
```
    Description copied from interface: Evaluator
    
    Returns the current cube.
    
    Specified by:
    
    getCube in interface Evaluator
  - getQuery
```
public final Query getQuery()
```
    Description copied from interface: Evaluator
    
    Returns the current query.
    
    Specified by:
    
    getQuery in interface Evaluator
  - getDepth
```
public final int getDepth()
```
    Description copied from interface: Evaluator
    
    Obsolete method.
    
    Specified by:
    
    getDepth in interface Evaluator
  - getParent
```
public final RolapEvaluator getParent()
```
    Description copied from interface: Evaluator
    
    Returns parent evaluator.
    
    Specified by:
    
    getParent in interface Evaluator
  - getSchemaReader
```
public final SchemaReader getSchemaReader()
```
    Description copied from interface: Evaluator
    
    Returns a SchemaReader appropriate for the current access-control context.
    
    Specified by:
    
    getSchemaReader in interface Evaluator
  - getQueryStartTime
```
public Date getQueryStartTime()
```
    Description copied from interface: Evaluator
    
    Returns the start time of the current query.
    
    Specified by:
    
    getQueryStartTime in interface Evaluator
  - getDialect
```
public Dialect getDialect()
```
  - push
```
public final RolapEvaluator push(Member[] members)
```
    Description copied from interface: Evaluator
    
    Creates a new Evaluator with each given member overriding the context of the current Evaluator for its hierarchy. Other hierarchies retain the same context as this Evaluator.
    In mondrian-3.3 and later, a more efficient way to save the state of an evaluator is to call Evaluator.savepoint() followed by Evaluator.restore(int). We recommend using those methods.
    
    Specified by:
    
    push in interface Evaluator
    
    Parameters:
    
    members - Array of members to add to the context
    
    Returns:
    
    Evaluator with each given member overriding the state of the current Evaluator for its hierarchy
  - push
```
public final RolapEvaluator push(Member member)
```
    Description copied from interface: Evaluator
    
    Creates a new Evaluator with the same context except for one member.
    This method is typically called before evaluating an expression which may corrupt the evaluation context.
    In mondrian-3.3 and later, a more efficient way to save the state of an evaluator is to call Evaluator.savepoint() followed by Evaluator.restore(int). We recommend using those methods.
    
    Specified by:
    
    push in interface Evaluator
    
    Parameters:
    
    member - Member to add to the context
    
    Returns:
    
    Evaluator with each given member overriding the state of the current Evaluator for its hierarchy
  - push
```
public final Evaluator push(boolean nonEmpty)
```
    Description copied from interface: Evaluator
    
    Creates a new evaluator with the same state except nonEmpty property
    In mondrian-3.3 and later, a more efficient way to save the state of an evaluator is to call Evaluator.savepoint() followed by Evaluator.restore(int). We recommend using those methods.
    
    Specified by:
    
    push in interface Evaluator
  - push
```
public final Evaluator push(boolean nonEmpty,
                            boolean nativeEnabled)
```
    Description copied from interface: Evaluator
    
    Creates a new evaluator with the same state except nonEmpty and nativeEnabled properties.
    In mondrian-3.3 and later, a more efficient way to save the state of an evaluator is to call Evaluator.savepoint() followed by Evaluator.restore(int). We recommend using those methods.
    
    Specified by:
    
    push in interface Evaluator
  - push
```
public final RolapEvaluator push()
```
    Description copied from interface: Evaluator
    
    Creates a new Evaluator with the same context as this evaluator.
    This method is typically called before evaluating an expression which may corrupt the evaluation context.
    In mondrian-3.3 and later, a more efficient way to save the state of an evaluator is to call Evaluator.savepoint() followed by Evaluator.restore(int). We recommend using those methods most of the time.
    However, it makes sense to use this method in the constructor of an iterator. It allows the iterator to modify its evaluation context without affecting the evaluation context of the calling code. This behavior cannot be achieved using savepoint.
    
    Specified by:
    
    push in interface Evaluator
    
    Returns:
    
    Evaluator with each given member overriding the state of the current Evaluator for its hierarchy
  - _push
```
protected RolapEvaluator _push(List<List<Member>> aggregationList)
```
    Creates a clone of the current validator.
    
    Parameters:
    
    aggregationList - List of tuples to add to aggregation context, or null
  - restore
```
public final void restore(int savepoint)
```
    Description copied from interface: Evaluator
    
    Restores previous evaluator.
    
    Specified by:
    
    restore in interface Evaluator
    
    Parameters:
    
    savepoint - Savepoint returned by Evaluator.savepoint()
  - pushAggregation
```
public final Evaluator pushAggregation(List<List<Member>> list)
```
    Description copied from interface: Evaluator
    
    Returns a new Aggregator whose aggregation context adds a given list of tuples, and whose evaluation context is the same as this Aggregator.
    
    Specified by:
    
    pushAggregation in interface Evaluator
    
    Parameters:
    
    list - List of tuples
    
    Returns:
    
    Aggregator with list added to its aggregation context
  - equals
```
public final boolean equals(Object obj)
```
    Returns true if the other object is a RolapEvaluator with identical context.
    
    Overrides:
    
    equals in class Object
  - hashCode
```
public final int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - setSlicerContext
```
public final void setSlicerContext(Member member)
```
    Adds a slicer member to the evaluator context, and remember it as part of the slicer. The slicer members are passed onto derived evaluators so that functions using those evaluators can choose to ignore the slicer members. One such function is CrossJoin emptiness check.
    
    Parameters:
    
    member - a member in the slicer
  - getSlicerMembers
```
public final List<Member> getSlicerMembers()
```
    Return the list of slicer members in the current evaluator context.
    
    Returns:
    
    slicerMembers
  - setSlicerTuples
```
public final void setSlicerTuples(TupleList tuples)
```
    Sets the slicer tuple object, used later by native evaluation and non-empty crossjoins.
    
    Parameters:
    
    tuples - slicer
  - getSlicerTuples
```
public final TupleList getSlicerTuples()
```
    Return the list of compound slicer tuples
  - isDisjointSlicerTuple
```
public boolean isDisjointSlicerTuple()
```
  - isMultiLevelSlicerTuple
```
public boolean isMultiLevelSlicerTuple()
```
  - getOptimizedSlicerTuples
```
public final TupleList getOptimizedSlicerTuples(RolapCube baseCube)
```
    Returns an optimized list of tuples related to the slicer based on the current evaluator. This function removes overridden compound slicer members from the tuple list. TODO: Add Virtual Cube test cases, demonstrating unrelated dimensions. TODO: Test various Tuple List sizes - tuples sizes that are bigger and smaller than list size
    
    Parameters:
    
    baseCube - if this is a virtual cube, remove the unrelated tuples from the slicer.
    
    Returns:
    
    optimized slicer tuple list
  - setContext
```
public final Member setContext(Member member)
```
    Description copied from interface: Evaluator
    
    Makes member the current member of its hierarchy.
    
    Specified by:
    
    setContext in interface Evaluator
    
    Parameters:
    
    member - New member
    
    Returns:
    
    Previous member of this hierarchy
  - setContext
```
public final void setContext(Member member,
                             boolean safe)
```
    Description copied from interface: Evaluator
    
    Makes member the current member of its hierarchy.
    If safe, checks whether this is the first time that a member of this hierarchy has been changed since Evaluator.savepoint() was called. If so, saves the previous member. If safe is false, never saves the previous member.
    Use safe = false only if you are sure that the context has been set before. For example,
    int n = 0; for (Member member : members) { evaluator.setContext(member, n++ > 0); }
    
    Specified by:
    
    setContext in interface Evaluator
    
    Parameters:
    
    member - New member
    
    safe - Whether to store the member of this hierarchy that was current last time that Evaluator.savepoint() was called.
  - setContext
```
public final void setContext(List<Member> memberList)
```
    Description copied from interface: Evaluator
    
    Sets the context to a list of members.
    Equivalent to
    for (Member member : memberList) { setContext(member); }
    
    Specified by:
    
    setContext in interface Evaluator
    
    Parameters:
    
    memberList - List of members
  - setContext
```
public final void setContext(List<Member> memberList,
                             boolean safe)
```
    Description copied from interface: Evaluator
    
    Sets the context to a list of members, optionally skipping the check whether it is necessary to store the previous member of each hierarchy.
    Equivalent to
    for (Member member : memberList) { setContext(member, safe); }
    
    Specified by:
    
    setContext in interface Evaluator
    
    Parameters:
    
    memberList - List of members
    
    safe - Whether to store the member of each hierarchy that was current last time that Evaluator.savepoint() was called.
  - setContext
```
public final void setContext(Member[] members)
```
    Description copied from interface: Evaluator
    
    Sets the context to an array of members.
    Equivalent to
    for (Member member : memberList) { setContext(member); }
    
    Specified by:
    
    setContext in interface Evaluator
    
    Parameters:
    
    members - Array of members
  - setContext
```
public final void setContext(Member[] members,
                             boolean safe)
```
    Description copied from interface: Evaluator
    
    Sets the context to an array of members, optionally skipping the check whether it is necessary to store the previous member of each hierarchy.
    Equivalent to
    for (Member member : memberList) { setContext(member, safe); }
    
    Specified by:
    
    setContext in interface Evaluator
    
    Parameters:
    
    members - Array of members
    
    safe - Whether to store the member of each hierarchy that was current last time that Evaluator.savepoint() was called.
  - getContext
```
public final RolapMember getContext(Hierarchy hierarchy)
```
    Specified by:
    
    getContext in interface Evaluator
  - getContext
```
public final RolapMember getContext(RolapHierarchy hierarchy)
```
    More specific version of getContext(mondrian.olap.Hierarchy), for internal code.
    
    Parameters:
    
    hierarchy - Hierarchy
    
    Returns:
    
    current member
  - evaluateCurrent
```
public final Object evaluateCurrent()
```
    Description copied from interface: Evaluator
    
    Calculates and returns the value of the cell at the current context.
    
    Specified by:
    
    evaluateCurrent in interface Evaluator
  - getProperty
```
public final Object getProperty(String name,
                                Object defaultValue)
```
    Description copied from interface: Evaluator
    
    Retrieves the value of property name. If more than one member in the current context defines that property, the one with the highest solve order has precedence.
    If the property is not defined, default value is returned.
    
    Specified by:
    
    getProperty in interface Evaluator
  - getFormatString
```
public final String getFormatString()
```
    Returns the format string for this cell. This is computed by evaluating the format expression in the current context, and therefore different cells may have different format strings.
    
    Specified by:
    
    getFormatString in interface Evaluator
  - getConnectionLocale
```
public final Locale getConnectionLocale()
```
    Description copied from interface: Evaluator
    
    Returns the connection's locale.
    
    Specified by:
    
    getConnectionLocale in interface Evaluator
  - format
```
public final String format(Object o)
```
    Description copied from interface: Evaluator
    
    Formats a value as a string according to the current context's format.
    
    Specified by:
    
    format in interface Evaluator
  - format
```
public final String format(Object o,
                           String formatString)
```
    Description copied from interface: Evaluator
    
    Formats a value as a string according to the current context's format, using a given format string.
    
    Specified by:
    
    format in interface Evaluator
  - getCachedResult
```
public final Object getCachedResult(ExpCacheDescriptor cacheDescriptor)
```
    Description copied from interface: Evaluator
    
    Simple caching of the result of an Exp. The key for the cache consists of all members of the current context that exp depends on. Members of independent hierarchies are not part of the key.
    
    Specified by:
    
    getCachedResult in interface Evaluator
    
    See Also:
    
    Calc.dependsOn(Hierarchy)
  - clearExpResultCache
```
public final void clearExpResultCache(boolean clearValidResult)
```
  - isNonEmpty
```
public final boolean isNonEmpty()
```
    Description copied from interface: Evaluator
    
    Returns true for an axis that is NON EMPTY.
    May be used by expression evaluators to optimize their result. For example, a top-level crossjoin may be optimized by removing all non-empty set elements before performing the crossjoin. This is possible because of the identity
    nonempty(crossjoin(a, b)) == nonempty(crossjoin(nonempty(a), nonempty(b));
    
    Specified by:
    
    isNonEmpty in interface Evaluator
  - setNonEmpty
```
public final void setNonEmpty(boolean nonEmpty)
```
    Description copied from interface: Evaluator
    
    Sets whether an expression evaluation should filter out empty cells. Allows expressions to modify non empty flag to evaluate their children.
    
    Specified by:
    
    setNonEmpty in interface Evaluator
  - newEvalException
```
public final RuntimeException newEvalException(Object context,
                                               String s)
```
    Description copied from interface: Evaluator
    
    Creates an exception which indicates that an error has occurred during the runtime evaluation of a function. The caller should then throw that exception.
    
    Specified by:
    
    newEvalException in interface Evaluator
  - getNamedSetEvaluator
```
public final Evaluator.NamedSetEvaluator getNamedSetEvaluator(NamedSet namedSet,
                                                              boolean create)
```
    Description copied from interface: Evaluator
    
    Returns an evaluator for a named set.
    
    Specified by:
    
    getNamedSetEvaluator in interface Evaluator
    
    Parameters:
    
    namedSet - Named set
    
    create - Whether to create evaluator if not found
    
    Returns:
    
    Evaluator of named set
  - getSetEvaluator
```
public final Evaluator.SetEvaluator getSetEvaluator(Exp exp,
                                                    boolean create)
```
    Description copied from interface: Evaluator
    
    Returns an evaluator for a set.
    
    Specified by:
    
    getSetEvaluator in interface Evaluator
    
    Parameters:
    
    exp - Expression
    
    create - Whether to create evaluator if not found
    
    Returns:
    
    Evaluator of named set
  - getMissCount
```
public final int getMissCount()
```
    Description copied from interface: Evaluator
    
    Returns the number of times that this evaluator has told a lie when retrieving cell values.
    
    Specified by:
    
    getMissCount in interface Evaluator
  - getParameterValue
```
public final Object getParameterValue(ParameterSlot slot)
```
    Description copied from interface: Evaluator
    
    Returns the value of a parameter, evaluating its default value if it is not set.
    
    Specified by:
    
    getParameterValue in interface Evaluator
  - getIterationLength
```
public final int getIterationLength()
```
    Specified by:
    
    getIterationLength in interface Evaluator
    
    Returns:
    
    the iteration length of the current context
  - setIterationLength
```
public final void setIterationLength(int iterationLength)
```
    Description copied from interface: Evaluator
    
    Sets the iteration length for the current evaluator context
    
    Specified by:
    
    setIterationLength in interface Evaluator
    
    Parameters:
    
    iterationLength - length to be set
  - isEvalAxes
```
public final boolean isEvalAxes()
```
    Specified by:
    
    isEvalAxes in interface Evaluator
    
    Returns:
    
    true if evaluating axes
  - setEvalAxes
```
public final void setEvalAxes(boolean evalAxes)
```
    Description copied from interface: Evaluator
    
    Indicate whether the evaluator is evaluating the axes
    
    Specified by:
    
    setEvalAxes in interface Evaluator
    
    Parameters:
    
    evalAxes - true if evaluating axes
  - shouldIgnoreUnrelatedDimensions
```
public boolean shouldIgnoreUnrelatedDimensions()
```
    Checks if unrelated dimensions to the measure in the current context should be ignored.
    
    Specified by:
    
    shouldIgnoreUnrelatedDimensions in interface Evaluator
    
    Returns:
    
    boolean

Class RolapEvaluator

Developers note

Nested Class Summary

Nested classes/interfaces inherited from interface mondrian.olap.Evaluator

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

cellReader

root

aggregationLists

slicerPredicateInfo

Constructor Detail

RolapEvaluator

RolapEvaluator

Method Detail

getActiveNativeExpansions

getSlicerPredicateInfo

create

getMeasureCube

mightReturnNullForUnrelatedDimension

needToReturnNullForUnrelatedDimension

nativeEnabled

currentIsEmpty

getPreviousContext

getTiming

savepoint

setNativeEnabled

getLogger

getMembers

getNonAllMembers

getAggregationLists

getCube

getQuery

getDepth

getParent

getSchemaReader

getQueryStartTime

getDialect

push

push

push

push

push

_push

restore

pushAggregation

equals

hashCode

setSlicerContext

getSlicerMembers

setSlicerTuples

getSlicerTuples

isDisjointSlicerTuple

isMultiLevelSlicerTuple

getOptimizedSlicerTuples

setContext

setContext

setContext

setContext

setContext

setContext

getContext

getContext

evaluateCurrent

getProperty

getFormatString

getConnectionLocale

format

format

getCachedResult

clearExpResultCache

isNonEmpty

setNonEmpty

newEvalException

getNamedSetEvaluator

getSetEvaluator

getMissCount

getParameterValue