com.bigdata.bop

Interface IVariableOrConstant<E>

All Superinterfaces:

BOp, Cloneable, IPropertySet, IValueExpression<E>, Serializable

All Known Subinterfaces:

IConstant<E>, IVariable<E>

All Known Implementing Classes:

Constant, Var

public interface IVariableOrConstant<E>
extends IValueExpression<E>

Abstraction models either a constant or an unbound variable.

Version:

$Id$

Author:

Bryan Thompson

Nested Class Summary

Nested classes/interfaces inherited from interface com.bigdata.bop.BOp

BOp.Annotations

Field Summary

Fields inherited from interface com.bigdata.bop.BOp

NOANNS, NOARGS

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(IVariableOrConstant<E> o) Return true if this is the same variable or if both values are Constant whose values are the same.
E	get() Return the bound value.
String	getName() Return the name of a variable.
boolean	isConstant() Return true iff this is a constant.
boolean	isVar() Return true iff this is a variable.

Methods inherited from interface com.bigdata.bop.IValueExpression

get, toString

Methods inherited from interface com.bigdata.bop.BOp

annotations, argIterator, args, arity, clone, get, getEvaluationContext, getId, getProperty, getRequiredProperty, isController, setProperty, toArray, toArray, toShortString, toString

Methods inherited from interface cutthecrap.utils.striterators.IPropertySet

getProperty

Method Detail

isVar

boolean isVar()

Return true iff this is a variable.

isConstant

boolean isConstant()

Return true iff this is a constant.

equals

boolean equals(IVariableOrConstant<E> o)

Return true if this is the same variable or if both values are Constant whose values are the same.

get

E get()

Return the bound value.

Throws:

UnsupportedOperationException - if this is a variable.

getName

String getName()

Return the name of a variable.

Throws:

UnsupportedOperationException - if this is not a variable.