Literal (Mondrian OLAP Engine, version TRUNK-SNAPSHOT)

java.lang.Object
- mondrian.olap.QueryPart
- - mondrian.olap.ExpBase
  - - mondrian.olap.Literal

All Implemented Interfaces:

Exp, Walkable
```
public class Literal
extends ExpBase
```
Represents a constant value, such as a string or number, in a parse tree.
Symbols, such as the ASC keyword in Order([Store].Members, [Measures].[Unit Sales], ASC), are also represented as Literals.

Field Summary

Fields
Modifier and Type	Field and Description
`int`	`category`
`static Literal`	`doubleNegativeOne`
`static Literal`	`doubleOne`
`static Literal`	`doubleZero`
`static Literal`	`emptyString`
`static Literal`	`negativeOne`
`static Literal`	`nullValue`
`static Literal`	`one`
`static Literal`	`zero`

Method Summary

Methods
Modifier and Type	Method and Description
`Calc`	`accept(ExpCompiler compiler)` Converts this expression into an a tree of expressions which can be efficiently evaluated.
`Object`	`accept(MdxVisitor visitor)` Accepts a visitor to this Exp.
`Exp`	`accept(Validator validator)` Validates this expression.
`Literal`	`clone()`
`static Literal`	`create(BigDecimal d)` Creates a numeric literal.
`static Literal`	`create(Double d)` Deprecated. Use `create(java.math.BigDecimal)`
`static Literal`	`create(Integer i)` Deprecated. Use `create(java.math.BigDecimal)`
`static Literal`	`createString(String s)` Creates a string literal.
`static Literal`	`createSymbol(String s)` Creates a symbol.
`int`	`getCategory()` Returns the `Category` of the expression.
`int`	`getIntValue()`
`Type`	`getType()` Returns the type of this expression.
`Object`	`getValue()`
`void`	`unparse(PrintWriter pw)` Writes a string representation of this parse tree node to the given writer.

Methods inherited from class mondrian.olap.ExpBase
cloneArray, getTypes, unparseList

Methods inherited from class mondrian.olap.QueryPart
explain, getChildren

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

- Field Detail
  - category
```
public final int category
```
  - nullValue
```
public static final Literal nullValue
```
  - emptyString
```
public static final Literal emptyString
```
  - zero
```
public static final Literal zero
```
  - one
```
public static final Literal one
```
  - negativeOne
```
public static final Literal negativeOne
```
  - doubleZero
```
public static final Literal doubleZero
```
  - doubleOne
```
public static final Literal doubleOne
```
  - doubleNegativeOne
```
public static final Literal doubleNegativeOne
```
- Method Detail
  - createString
```
public static Literal createString(String s)
```
    Creates a string literal.
    
    See Also:
    createSymbol(java.lang.String)
  - createSymbol
```
public static Literal createSymbol(String s)
```
    Creates a symbol.
    
    See Also:
    createString(java.lang.String)
  - create
```
public static Literal create(Double d)
```
    Deprecated. Use create(java.math.BigDecimal)
    
    Creates a numeric literal.
  - create
```
public static Literal create(Integer i)
```
    Deprecated. Use create(java.math.BigDecimal)
    
    Creates an integer literal.
  - create
```
public static Literal create(BigDecimal d)
```
    Creates a numeric literal.
    Using a BigDecimal allows us to store the precise value that the user typed. We will have to fit the value into a native double or int later on, but parse time is not the time to be throwing away information.
  - clone
```
public Literal clone()
```
    Specified by:
    
    clone in interface Exp
    
    Specified by:
    
    clone in class ExpBase
  - unparse
```
public void unparse(PrintWriter pw)
```
    Description copied from class: QueryPart
    
    Writes a string representation of this parse tree node to the given writer.
    
    Specified by:
    
    unparse in interface Exp
    
    Overrides:
    
    unparse in class QueryPart
    
    Parameters:
    pw - writer
  - getCategory
```
public int getCategory()
```
    Description copied from interface: Exp
    
    Returns the Category of the expression.
  - getType
```
public Type getType()
```
    Description copied from interface: Exp
    
    Returns the type of this expression. Never null.
  - accept
```
public Exp accept(Validator validator)
```
    Description copied from interface: Exp
    
    Validates this expression. The validator acts in the role of 'visitor' (see Gang of Four 'visitor pattern'), and an expression in the role of 'visitee'.
    
    Parameters:
    validator - Validator contains validation context
    
    Returns:
    The validated expression; often but not always the same as this expression
  - accept
```
public Calc accept(ExpCompiler compiler)
```
    Description copied from interface: Exp
    
    Converts this expression into an a tree of expressions which can be efficiently evaluated.
    
    Specified by:
    
    accept in interface Exp
    
    Overrides:
    
    accept in class ExpBase
    
    Returns:
    A compiled expression
  - accept
```
public Object accept(MdxVisitor visitor)
```
    Description copied from interface: Exp
    
    Accepts a visitor to this Exp. The implementation should generally dispatches to the MdxVisitor.visit(mondrian.olap.Query) method appropriate to the type of expression.
    
    Parameters:
    visitor - Visitor
  - getValue
```
public Object getValue()
```
  - getIntValue
```
public int getIntValue()
```

Class Literal

Field Summary

Method Summary

Methods inherited from class mondrian.olap.ExpBase

Methods inherited from class mondrian.olap.QueryPart

Methods inherited from class java.lang.Object

Field Detail

category

nullValue

emptyString

zero

one

negativeOne

doubleZero

doubleOne

doubleNegativeOne

Method Detail

createString

createSymbol

create

create

create

clone

unparse

getCategory

getType

accept

accept

accept

getValue

getIntValue