Package net.sf.basedb.util.jep.convert

Class UMinusConverter

java.lang.Object

net.sf.basedb.util.jep.convert.AbstractJepConversionFunction<Node>

net.sf.basedb.util.jep.convert.UMinusConverter

All Implemented Interfaces:

JepConversionFunction<Node>

public class UMinusConverter
extends AbstractJepConversionFunction<Node>

Convert UMinus function to a Query API Expression.

Version:

2.4

Author:

nicklas

Last modified

$Date: 2008-09-11 22:08:14 +0200 (to, 11 sep 2008) $

Constructor Summary

Constructors

Constructor	Description
UMinusConverter()

Method Summary

Modifier and Type	Method	Description
String	getDescription()	Get a short description of the function or operator
String	getName()	Get the name of the function or the symbol of the operator
boolean	isOperator()	Convert to expression by calling Expressions.negate(Expression).
Expression	toExpression(Node node)	Convert to a restriction and then use Expressions.bool(Restriction) to create a boolean expression.

Methods inherited from class net.sf.basedb.util.jep.convert.AbstractJepConversionFunction

isFunction, toRestriction

Methods inherited from class java.lang.Object

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

Constructor Details

UMinusConverter

public UMinusConverter()

Method Details

isOperator

public boolean isOperator()

Convert to expression by calling Expressions.negate(Expression).

Specified by:

isOperator in interface JepConversionFunction<Node>

Overrides:

isOperator in class AbstractJepConversionFunction<Node>

Returns:

Always FALSE

getName

public String getName()

Description copied from interface: JepConversionFunction

Get the name of the function or the symbol of the operator

Specified by:

getName in interface JepConversionFunction<Node>

Overrides:

getName in class AbstractJepConversionFunction<Node>

Returns:

The string '-'

getDescription

public String getDescription()

Description copied from interface: JepConversionFunction

Get a short description of the function or operator

Specified by:

getDescription in interface JepConversionFunction<Node>

Overrides:

getDescription in class AbstractJepConversionFunction<Node>

Returns:

Always null

toExpression

public Expression toExpression(Node node)

Description copied from class: AbstractJepConversionFunction

Convert to a restriction and then use Expressions.bool(Restriction) to create a boolean expression.

Specified by:

toExpression in interface JepConversionFunction<Node>

Overrides:

toExpression in class AbstractJepConversionFunction<Node>

Parameters:

node - The object to convert

Returns:

An expression or null