ExpCacheDescriptor (Pentaho Community Edition Project: mondrian 9.5.0.0-252 API)

java.lang.Object
- mondrian.olap.ExpCacheDescriptor

```
public class ExpCacheDescriptor
extends Object
```
Holds information necessary to add an expression to the expression result cache (see Evaluator.getCachedResult(ExpCacheDescriptor)).

Since:

Aug 16, 2005

Author:

jhyde

Constructor Summary

Constructors
Constructor	Description
`ExpCacheDescriptor(Exp exp, Calc calc, Evaluator evaluator)`	Creates a descriptor with a given compiled expression.
`ExpCacheDescriptor(Exp exp, ExpCompiler compiler)`	Creates a descriptor.
`ExpCacheDescriptor(Exp exp, Evaluator evaluator)`	Creates a descriptor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`evaluate(Evaluator evaluator)`
`Calc`	`getCalc()`
`int[]`	`getDependentHierarchyOrdinals()`	Returns the ordinals of the hierarchies which this expression is dependent upon.
`Exp`	`getExp()`

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

- Constructor Detail
  - ExpCacheDescriptor
```
public ExpCacheDescriptor(Exp exp,
                          Calc calc,
                          Evaluator evaluator)
```
    Creates a descriptor with a given compiled expression.
    
    Parameters:
    
    exp - Expression
    
    calc - Compiled expression
    
    evaluator - Evaluator
  - ExpCacheDescriptor
```
public ExpCacheDescriptor(Exp exp,
                          Evaluator evaluator)
```
    Creates a descriptor.
    
    Parameters:
    
    exp - Expression
    
    evaluator - Evaluator
  - ExpCacheDescriptor
```
public ExpCacheDescriptor(Exp exp,
                          ExpCompiler compiler)
```
    Creates a descriptor.
    
    Parameters:
    
    exp - Expression
    
    compiler - Compiler
- Method Detail
  - getExp
```
public Exp getExp()
```
  - getCalc
```
public Calc getCalc()
```
  - evaluate
```
public Object evaluate(Evaluator evaluator)
```
  - getDependentHierarchyOrdinals
```
public int[] getDependentHierarchyOrdinals()
```
    Returns the ordinals of the hierarchies which this expression is dependent upon. When the cache descriptor is used to generate a cache key, the key will consist of a member from each of these hierarchies.