Package net.sf.saxon.expr.parser

Class OperatorInfo

java.lang.Object

net.sf.saxon.expr.parser.OperatorInfo

public class OperatorInfo
extends Object

Constructor Summary

Constructors

Constructor	Description
OperatorInfo()

Method Summary

Modifier and Type	Method	Description
static OperatorSymbol	inverse(OperatorSymbol operator)	Return the inverse of a relational operator, so that "a op b" can be rewritten as "b inverse(op) a"
static boolean	isOrderedOperator(OperatorSymbol operator)
static OperatorSymbol	negate(OperatorSymbol operator)	Return the negation of a relational operator, so that "a op b" can be rewritten as not(b op' a)
static int	operatorPrecedence(OperatorSymbol symbol)	Get the precedence associated with a given operator
String	toString(OperatorSymbol symbol)	Get a string representation of an operator

Methods inherited from class java.lang.Object

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

Constructor Details

OperatorInfo

public OperatorInfo()

Method Details

toString

public String toString(OperatorSymbol symbol)

Get a string representation of an operator

operatorPrecedence

public static int operatorPrecedence(OperatorSymbol symbol)

Get the precedence associated with a given operator

Parameters:

symbol - the operator in question

Returns:

a higher number for higher precedence (closer binding)

inverse

public static OperatorSymbol inverse(OperatorSymbol operator)

Return the inverse of a relational operator, so that "a op b" can be rewritten as "b inverse(op) a"

Parameters:

operator - the operator whose inverse is required

Returns:

the inverse operator

negate

public static OperatorSymbol negate(OperatorSymbol operator)

Return the negation of a relational operator, so that "a op b" can be rewritten as not(b op' a)

Parameters:

operator - the operator to be negated

Returns:

the negated operator

isOrderedOperator

public static boolean isOrderedOperator(OperatorSymbol operator)