com.caucho.xpath.expr

Class NumericExpr

java.lang.Object

com.caucho.xpath.Expr

com.caucho.xpath.expr.NumericExpr

public class NumericExpr
extends Expr

Field Summary

Fields inherited from class com.caucho.xpath.Expr

ADD, AND, ATTRIBUTE, BASE_URI, BOOLEAN, BOOLEAN_EQ, BOOLEAN_NEQ, CEILING, CONCAT, CONST, CONTAINS, COUNT, DIV, ELEMENT, EQ, FALSE, FLOOR, FORMAT_NUMBER, FUNCTION_AVAILABLE, GE, GENERATE_ID, GT, ID, IF, LANG, LAST, LAST_FUN, LE, LOCAL_PART, LT, MOD, MUL, NAMESPACE, NEG, NEQ, NODE_SET, NORMALIZE, NOT, NUMBER, NUMBER_EQ, NUMBER_GE, NUMBER_GT, NUMBER_LE, NUMBER_LT, NUMBER_NEQ, OR, POSITION, QNAME, QUO, ROUND, SELF, SELF_NAME, STARTS_WITH, STRING, STRING_EQ, STRING_LENGTH, STRING_NEQ, SUB, SUBSTRING, SUBSTRING_AFTER, SUBSTRING_BEFORE, SUM, SYSTEM_PROPERTY, TRANSLATE, TRUE

Constructor Summary

Constructors

Constructor and Description
NumericExpr(double value)
NumericExpr(int code, AbstractPattern listPattern)
NumericExpr(int code, AbstractPattern axis, AbstractPattern pattern)
NumericExpr(int code, java.util.ArrayList<Expr> args)
NumericExpr(int code, Expr expr)
NumericExpr(int code, Expr left, Expr right)

Method Summary

Modifier and Type	Method and Description
boolean	evalBoolean(org.w3c.dom.Node node, ExprEnvironment env) Evaluates the expression as a boolean.
double	evalNumber(org.w3c.dom.Node node, ExprEnvironment env) Evaluates the expression as a number.
java.lang.Object	evalObject(org.w3c.dom.Node node, ExprEnvironment env) Evaluates the expression as an object.
java.lang.String	evalString(org.w3c.dom.Node node, ExprEnvironment env) Evaluates the expression as a string.
Var	evalVar(org.w3c.dom.Node node, ExprEnvironment env) Evaluates to a variable.
AbstractPattern	getListContext()
double	getValue() Returns the expression's value.
boolean	isConstant() Returns true of the expression is constant.
boolean	isNumber() true if the expression prefers to return a number.
java.lang.String	toString()

Methods inherited from class com.caucho.xpath.Expr

addParam, addVar, evalBoolean, evalNodeSet, evalNodeSet, evalNumber, evalObject, evalString, evalString, evalString, isBoolean, isNodeSet, isString, setListContext, setVar, stringToNumber, toBoolean, toDouble, toNode, toNodeList, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

NumericExpr

public NumericExpr(int code,
                   Expr left,
                   Expr right)

NumericExpr

public NumericExpr(int code,
                   Expr expr)

NumericExpr

public NumericExpr(double value)

NumericExpr

public NumericExpr(int code,
                   java.util.ArrayList<Expr> args)

NumericExpr

public NumericExpr(int code,
                   AbstractPattern axis,
                   AbstractPattern pattern)

NumericExpr

public NumericExpr(int code,
                   AbstractPattern listPattern)

Method Detail

getListContext

public AbstractPattern getListContext()

Overrides:

getListContext in class Expr

isNumber

public boolean isNumber()

Description copied from class: Expr

true if the expression prefers to return a number.

Overrides:

isNumber in class Expr

isConstant

public boolean isConstant()

Returns true of the expression is constant.

getValue

public double getValue()

Returns the expression's value.

evalVar

public Var evalVar(org.w3c.dom.Node node,
                   ExprEnvironment env)
            throws XPathException

Evaluates to a variable.

Overrides:

evalVar in class Expr

Parameters:

node - the node to evaluate and use as a context.

env - the variable environment.

Returns:

a variable containing the value.

Throws:

XPathException

evalNumber

public double evalNumber(org.w3c.dom.Node node,
                         ExprEnvironment env)
                  throws XPathException

Evaluates the expression as a number.

Specified by:

evalNumber in class Expr

Parameters:

node - the node to evaluate and use as a context.

env - the variable environment.

Returns:

the numeric value

Throws:

XPathException

evalBoolean

public boolean evalBoolean(org.w3c.dom.Node node,
                           ExprEnvironment env)
                    throws XPathException

Evaluates the expression as a boolean.

Specified by:

evalBoolean in class Expr

Parameters:

node - the current node

env - the variable environment.

Returns:

the boolean representation of the number.

Throws:

XPathException

evalString

public java.lang.String evalString(org.w3c.dom.Node node,
                                   ExprEnvironment env)
                            throws XPathException

Evaluates the expression as a string.

Specified by:

evalString in class Expr

Parameters:

node - the current node

env - the variable environment.

Returns:

the string representation of the number.

Throws:

XPathException

evalObject

public java.lang.Object evalObject(org.w3c.dom.Node node,
                                   ExprEnvironment env)
                            throws XPathException

Evaluates the expression as an object.

Specified by:

evalObject in class Expr

Parameters:

node - the current node

env - the variable environment.

Returns:

the Double representation of the number.

Throws:

XPathException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object