com.caucho.xpath.expr

Class AbstractNumberExpr

java.lang.Object

com.caucho.xpath.Expr

com.caucho.xpath.expr.AbstractNumberExpr

public abstract class AbstractNumberExpr
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
AbstractNumberExpr()

Method Summary

Modifier and Type	Method and Description
boolean	evalBoolean(org.w3c.dom.Node node, ExprEnvironment env) Evaluates the expression as a boolean.
abstract 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.
boolean	isNumber() true if the expression prefers to return a number.

Methods inherited from class com.caucho.xpath.Expr

addParam, addVar, evalBoolean, evalNodeSet, evalNodeSet, evalNumber, evalObject, evalString, evalString, evalString, getListContext, 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, toString, wait, wait, wait

Constructor Detail

AbstractNumberExpr

public AbstractNumberExpr()

Method Detail

isNumber

public boolean isNumber()

Description copied from class: Expr

true if the expression prefers to return a number.

Overrides:

isNumber in class Expr

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 abstract 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