jlibs.xml.sax.dog.expr.func

Class Function

java.lang.Object

jlibs.xml.sax.dog.expr.func.Function

Direct Known Subclasses:

Functions.ChangeCase, Functions.TypeCast, Functions.UserFunction, PeekingFunction

public abstract class Function
extends Object

Author:

Santhosh Kumar T

Field Summary

Fields

Modifier and Type	Field and Description
int	mandatory tells how many arguments from beginning are mandatory.
DataType[]	memberTypes
String	name
String	namespace
DataType	resultType
boolean	varArgs

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Function(String name, DataType resultType, boolean varArgs, DataType... memberTypes)
protected	Function(String namespace, String name, DataType resultType, boolean varArgs, DataType... memberTypes)
protected	Function(String namespace, String name, DataType resultType, boolean varArgs, int mandatory, DataType... memberTypes)

Method Summary

Modifier and Type	Method and Description
boolean	canAccept(int noOfMembers)
abstract Object	evaluate(Object... args)
boolean	isOperator()
DataType	memberType(int i)

Methods inherited from class java.lang.Object

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

Field Detail

namespace

public final String namespace

name

public final String name

resultType

public final DataType resultType

memberTypes

public final DataType[] memberTypes

varArgs

public final boolean varArgs

mandatory

public final int mandatory

tells how many arguments from beginning are mandatory. in case varArgs is : o false: varArgs==membterTypes.lenth o true: varArgs==memberTypes.length or varArgs==memberTypes.length-1

Constructor Detail

Function

protected Function(String name,
                   DataType resultType,
                   boolean varArgs,
                   DataType... memberTypes)

Function

protected Function(String namespace,
                   String name,
                   DataType resultType,
                   boolean varArgs,
                   DataType... memberTypes)

Function

protected Function(String namespace,
                   String name,
                   DataType resultType,
                   boolean varArgs,
                   int mandatory,
                   DataType... memberTypes)

Method Detail

canAccept

public final boolean canAccept(int noOfMembers)

memberType

public final DataType memberType(int i)

evaluate

public abstract Object evaluate(Object... args)

isOperator

public final boolean isOperator()