net.sf.saffron.oj.util
Class JavaRowExpression

java.lang.Object
  |
  +--net.sf.saffron.rex.RexNode
        |
        +--net.sf.saffron.oj.util.JavaRowExpression

public class JavaRowExpression

extends RexNode

A row expression which is implemented by an underlying Java expression.

This is a leaf node of a RexNode tree, but the Java expression, represented by a Expression object, may be complex.

Since:

Nov 23, 2003

Version:

$Id: $

Author:

jhyde

See Also:

JavaRexBuilder

Field Summary

(package private) Environment	env
Expression	expression
private SaffronType	type

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

digest

Constructor Summary

JavaRowExpression(Environment env, SaffronType type, Expression expression)

Method Summary

Object	clone()
SaffronType	getType()
boolean	isAlwaysTrue() Returns whether this expression always returns true.

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

getKind, isA, toString

Methods inherited from class java.lang.Object

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

Field Detail

env

final Environment env

type

private final SaffronType type

expression

public final Expression expression

Constructor Detail

JavaRowExpression

public JavaRowExpression(Environment env,
                         SaffronType type,
                         Expression expression)

Method Detail

isAlwaysTrue

public boolean isAlwaysTrue()

Description copied from class: RexNode

Returns whether this expression always returns true. (Such as if this expression is equal to the literal TRUE.)

Overrides:

isAlwaysTrue in class RexNode

getType

public SaffronType getType()

Specified by:

getType in class RexNode

clone

public Object clone()

Specified by:

clone in class RexNode