com.caucho.xpath.expr

Class StaticJavaExpr

java.lang.Object

com.caucho.xpath.Expr

com.caucho.xpath.expr.StaticJavaExpr

public class StaticJavaExpr
extends Expr

Implements the static java extension functions.

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
StaticJavaExpr(java.lang.reflect.Method method, java.util.ArrayList args) Create a StringExpression with three arguments.

Method Summary

Modifier and Type	Method and Description
boolean	evalBoolean(org.w3c.dom.Node node, ExprEnvironment env) Evaluate the expression as a boolean, i.e.
double	evalNumber(org.w3c.dom.Node node, ExprEnvironment env) Evaluate the expression as a double, i.e.
java.lang.Object	evalObject(org.w3c.dom.Node node, ExprEnvironment env) Evaluate the expression as an object, i.e.
java.lang.String	evalString(org.w3c.dom.Node node, ExprEnvironment env) Evaluates the expression as an string.
boolean	isBoolean() True if this returns a boolean.
boolean	isNumber() True if this returns a boolean.
boolean	isString() True if it returns a string.
java.lang.String	toString() Return the expression as a string.

Methods inherited from class com.caucho.xpath.Expr

addParam, addVar, evalBoolean, evalNodeSet, evalNodeSet, evalNumber, evalObject, evalString, evalString, evalString, evalVar, getListContext, isNodeSet, 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

StaticJavaExpr

public StaticJavaExpr(java.lang.reflect.Method method,
                      java.util.ArrayList args)

Create a StringExpression with three arguments.

Parameters:

method - Java method

args - the arguments

Method Detail

isString

public boolean isString()

True if it returns a string.

Overrides:

isString in class Expr

isBoolean

public boolean isBoolean()

True if this returns a boolean.

Overrides:

isBoolean in class Expr

isNumber

public boolean isNumber()

True if this returns a boolean.

Overrides:

isNumber in class Expr

evalString

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

Evaluates the expression as an string.

Specified by:

evalString in class Expr

Parameters:

node - the current node

env - the variable environment.

Returns:

the string representation of the expression.

Throws:

XPathException

evalBoolean

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

Evaluate the expression as a boolean, i.e. evaluate it as a string and then convert it to a boolean.

Specified by:

evalBoolean in class Expr

Parameters:

node - the current node

env - the variable environment.

Returns:

the boolean representation of the expression.

Throws:

XPathException

evalNumber

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

Evaluate the expression as a double, i.e. evaluate it as a string and then convert it to a double.

Specified by:

evalNumber in class Expr

Parameters:

node - the current node

env - the variable environment.

Returns:

the numeric representation of the expression.

Throws:

XPathException

evalObject

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

Evaluate the expression as an object, i.e. return the string value.

Specified by:

evalObject in class Expr

Parameters:

node - the current node

env - the variable environment.

Returns:

the boolean representation of the expression.

Throws:

XPathException

toString

public java.lang.String toString()

Return the expression as a string. toString() returns a valid XPath expression. This lets applications like XSLT use toString() to print the string in the generated Java.

Overrides:

toString in class java.lang.Object