net.sf.saffron.rex
Class RexLiteral

java.lang.Object
  |
  +--net.sf.saffron.rex.RexNode
        |
        +--net.sf.saffron.rex.RexLiteral

public class RexLiteral

extends RexNode

Constant value in a row-expression.

There are several methods for creating literals in RexBuilder: RexBuilder.makeLiteral(boolean) and so forth.

Since:

Nov 24, 2003

Version:

$Id: $

Author:

jhyde

Field Summary

private SaffronType	type
Object	value

Fields inherited from class net.sf.saffron.rex.RexNode

digest

Constructor Summary

(package private)

RexLiteral(Object value, SaffronType type) Creates a SqlLiteral.

Method Summary

static boolean	booleanValue(RexNode node)
Object	clone()
boolean	equals(Object obj)
private static boolean	equals(Object o1, Object o2)
private static String	format(Object value, SaffronType type)
RexKind	getKind() Returns the kind of node this is.
SaffronType	getType()
Object	getValue() Returns the value of this literal.
int	hashCode()
static int	intValue(SqlNode node)
void	unparse(SqlWriter writer)

Methods inherited from class net.sf.saffron.rex.RexNode

isA, isAlwaysTrue, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

value

public final Object value

type

private final SaffronType type

Constructor Detail

RexLiteral

RexLiteral(Object value,
           SaffronType type)

Creates a SqlLiteral.

Pre-condition:

value instanceof String || value instanceof BigInteger || value instanceof Boolean || value == null

Method Detail

format

private static String format(Object value,
                             SaffronType type)

getType

public SaffronType getType()

Specified by:

getType in class RexNode

getKind

public RexKind getKind()

Description copied from class: RexNode

Returns the kind of node this is.

Overrides:

getKind in class RexNode

Returns:

A RexKind value, never null

getValue

public Object getValue()

Returns the value of this literal.

Post-condition:

return instanceof String || return instanceof BigInteger || return instanceof Boolean || return == null

booleanValue

public static boolean booleanValue(RexNode node)

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

intValue

public static int intValue(SqlNode node)

clone

public Object clone()

Specified by:

clone in class RexNode

unparse

public void unparse(SqlWriter writer)

equals

private static boolean equals(Object o1,
                              Object o2)