isql.expression
Class ConstantExpression

java.lang.Object
  isql.expression.ConstantExpression

All Implemented Interfaces:

ISimpleExpression, IWhereExpression, IExpression

public class ConstantExpression
extends java.lang.Object
implements ISimpleExpression, IWhereExpression

Expression consiting of just a constant, like a number or a string

Author:

SHZ Oct 1, 2007

Constructor Summary

ConstantExpression(IConstant constant)

Method Summary

java.util.Set<ColumnKey>	getInvolvedColumns() Returns the table columns named in the expression
ITypedValue	getResult() Get the result of the expression (can be a constant or an array)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantExpression

public ConstantExpression(IConstant constant)

Method Detail

getResult

public ITypedValue getResult()
                      throws ISQLException

Description copied from interface: IExpression

Get the result of the expression (can be a constant or an array)

Specified by:

getResult in interface IExpression

Returns:

the result

Throws:

ISQLException

getInvolvedColumns

public java.util.Set<ColumnKey> getInvolvedColumns()

Description copied from interface: IExpression

Returns the table columns named in the expression

Specified by:

getInvolvedColumns in interface IExpression

Returns:

the identifiers of the columns

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object