org.apache.commons.jxpath.ri.compiler
Class CoreFunction

java.lang.Object
  org.apache.commons.jxpath.ri.compiler.Expression
      org.apache.commons.jxpath.ri.compiler.Operation
          org.apache.commons.jxpath.ri.compiler.CoreFunction

public class CoreFunction

extends Operation

An element of the compile tree representing one of built-in functions like "position()" or "number()".

Version:

$Revision: 1.16 $ $Date: 2004/04/01 02:53:45 $

Author:

Dmitri Plotnikov

Nested Class Summary

Nested classes inherited from class org.apache.commons.jxpath.ri.compiler.Expression

Expression.PointerIterator, Expression.ValueIterator

Field Summary

private int	functionCode
private static java.lang.Double	ZERO

Fields inherited from class org.apache.commons.jxpath.ri.compiler.Operation

args

Fields inherited from class org.apache.commons.jxpath.ri.compiler.Expression

NOT_A_NUMBER, ONE

Constructor Summary

CoreFunction(int functionCode, Expression[] args)

Method Summary

private void	assertArgCount(int count)
java.lang.Object	compute(EvalContext context)
boolean	computeContextDependent() Returns true if any argument is context dependent or if the function is last(), position(), boolean(), local-name(), name(), string(), lang(), number().
java.lang.Object	computeValue(EvalContext context) Computes a built-in function
protected java.lang.Object	functionBoolean(EvalContext context)
protected java.lang.Object	functionCeiling(EvalContext context)
protected java.lang.Object	functionConcat(EvalContext context)
protected java.lang.Object	functionContains(EvalContext context)
protected java.lang.Object	functionCount(EvalContext context)
protected java.lang.Object	functionFalse(EvalContext context)
protected java.lang.Object	functionFloor(EvalContext context)
private java.lang.Object	functionFormatNumber(EvalContext context)
protected java.lang.Object	functionID(EvalContext context)
protected java.lang.Object	functionKey(EvalContext context)
protected java.lang.Object	functionLang(EvalContext context)
protected java.lang.Object	functionLast(EvalContext context)
protected java.lang.Object	functionLocalName(EvalContext context)
protected java.lang.Object	functionName(EvalContext context)
protected java.lang.Object	functionNamespaceURI(EvalContext context)
protected java.lang.Object	functionNormalizeSpace(EvalContext context)
protected java.lang.Object	functionNot(EvalContext context)
protected java.lang.Object	functionNull(EvalContext context)
protected java.lang.Object	functionNumber(EvalContext context)
protected java.lang.Object	functionPosition(EvalContext context)
protected java.lang.Object	functionRound(EvalContext context)
protected java.lang.Object	functionStartsWith(EvalContext context)
protected java.lang.Object	functionString(EvalContext context)
protected java.lang.Object	functionStringLength(EvalContext context)
protected java.lang.Object	functionSubstring(EvalContext context)
protected java.lang.Object	functionSubstringAfter(EvalContext context)
protected java.lang.Object	functionSubstringBefore(EvalContext context)
protected java.lang.Object	functionSum(EvalContext context)
protected java.lang.Object	functionTranslate(EvalContext context)
protected java.lang.Object	functionTrue(EvalContext context)
Expression	getArg1()
Expression	getArg2()
Expression	getArg3()
int	getArgumentCount()
int	getFunctionCode()
protected java.lang.String	getFunctionName()
java.lang.String	toString()

Methods inherited from class org.apache.commons.jxpath.ri.compiler.Operation

getArguments

Methods inherited from class org.apache.commons.jxpath.ri.compiler.Expression

isContextDependent, iterate, iteratePointers

Methods inherited from class java.lang.Object

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

Field Detail

ZERO

private static final java.lang.Double ZERO

functionCode

private int functionCode

Constructor Detail

CoreFunction

public CoreFunction(int functionCode,
                    Expression[] args)

Method Detail

getFunctionCode

public int getFunctionCode()

getFunctionName

protected java.lang.String getFunctionName()

getArg1

public Expression getArg1()

getArg2

public Expression getArg2()

getArg3

public Expression getArg3()

getArgumentCount

public int getArgumentCount()

computeContextDependent

public boolean computeContextDependent()

Returns true if any argument is context dependent or if the function is last(), position(), boolean(), local-name(), name(), string(), lang(), number().

Overrides:

computeContextDependent in class Operation

toString

public java.lang.String toString()

compute

public java.lang.Object compute(EvalContext context)

Specified by:

compute in class Expression

computeValue

public java.lang.Object computeValue(EvalContext context)

Computes a built-in function

Specified by:

computeValue in class Expression

functionLast

protected java.lang.Object functionLast(EvalContext context)

functionPosition

protected java.lang.Object functionPosition(EvalContext context)

functionCount

protected java.lang.Object functionCount(EvalContext context)

functionLang

protected java.lang.Object functionLang(EvalContext context)

functionID

protected java.lang.Object functionID(EvalContext context)

functionKey

protected java.lang.Object functionKey(EvalContext context)

functionNamespaceURI

protected java.lang.Object functionNamespaceURI(EvalContext context)

functionLocalName

protected java.lang.Object functionLocalName(EvalContext context)

functionName

protected java.lang.Object functionName(EvalContext context)

functionString

protected java.lang.Object functionString(EvalContext context)

functionConcat

protected java.lang.Object functionConcat(EvalContext context)

functionStartsWith

protected java.lang.Object functionStartsWith(EvalContext context)

functionContains

protected java.lang.Object functionContains(EvalContext context)

functionSubstringBefore

protected java.lang.Object functionSubstringBefore(EvalContext context)

functionSubstringAfter

protected java.lang.Object functionSubstringAfter(EvalContext context)

functionSubstring

protected java.lang.Object functionSubstring(EvalContext context)

functionStringLength

protected java.lang.Object functionStringLength(EvalContext context)

functionNormalizeSpace

protected java.lang.Object functionNormalizeSpace(EvalContext context)

functionTranslate

protected java.lang.Object functionTranslate(EvalContext context)

functionBoolean

protected java.lang.Object functionBoolean(EvalContext context)

functionNot

protected java.lang.Object functionNot(EvalContext context)

functionTrue

protected java.lang.Object functionTrue(EvalContext context)

functionFalse

protected java.lang.Object functionFalse(EvalContext context)

functionNull

protected java.lang.Object functionNull(EvalContext context)

functionNumber

protected java.lang.Object functionNumber(EvalContext context)

functionSum

protected java.lang.Object functionSum(EvalContext context)

functionFloor

protected java.lang.Object functionFloor(EvalContext context)

functionCeiling

protected java.lang.Object functionCeiling(EvalContext context)

functionRound

protected java.lang.Object functionRound(EvalContext context)

functionFormatNumber

private java.lang.Object functionFormatNumber(EvalContext context)

assertArgCount

private void assertArgCount(int count)