org.vedantatree.expressionoasis.extensions

Class XMLFunctionProvider

java.lang.Object

org.vedantatree.expressionoasis.extensions.XMLFunctionProvider

All Implemented Interfaces:

FunctionProvider

public class XMLFunctionProvider
extends Object
implements FunctionProvider

This is the XML function provider.

Version:

1.0 Modified to register xml function with default grammar and expression factory., 1.1

Author:

Parmod Kamboj, Mohit Gupta, kmarwood

Constructor Summary

Constructors

Constructor and Description
XMLFunctionProvider()

Method Summary

Modifier and Type	Method and Description
Type	getFunctionType(String functionName, Type[] parameterTypes) Gets the return type of the function.
ValueObject	getFunctionValue(String functionName, ValueObject[] parameters) Gets the return value of function.
void	initialize(ExpressionContext expressionContext) It initialize the Function provider with expression context and also gives a chance to pre-initialize any internal states for operations
static void	main(String[] args)
boolean	supportsFunction(String functionName, Type[] parameterTypes) Checks whether the this function provider supports any function or not.

Methods inherited from class java.lang.Object

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

Constructor Detail

XMLFunctionProvider

public XMLFunctionProvider()

Method Detail

getFunctionType

public Type getFunctionType(String functionName,
                            Type[] parameterTypes)
                     throws ExpressionEngineException

Description copied from interface: FunctionProvider

Gets the return type of the function.

Specified by:

getFunctionType in interface FunctionProvider

Parameters:

functionName - the name of the function.

parameterTypes - the types of the parameters

Returns:

the return type of the function

Throws:

ExpressionEngineException - if anything goes wrong

getFunctionValue

public ValueObject getFunctionValue(String functionName,
                                    ValueObject[] parameters)
                             throws ExpressionEngineException

Description copied from interface: FunctionProvider

Gets the return value of function.

Specified by:

getFunctionValue in interface FunctionProvider

Parameters:

functionName - the name of the function

parameters - the parameters values of the function

Returns:

the return value of the function

Throws:

ExpressionEngineException - if anything goes wrong

initialize

public void initialize(ExpressionContext expressionContext)
                throws ExpressionEngineException

Description copied from interface: FunctionProvider

It initialize the Function provider with expression context and also gives a chance to pre-initialize any internal states for operations

Specified by:

initialize in interface FunctionProvider

Parameters:

expressionContext - Context of current expression evaluation process

Throws:

ExpressionEngineException

supportsFunction

public boolean supportsFunction(String functionName,
                                Type[] parameterTypes)
                         throws ExpressionEngineException

Description copied from interface: FunctionProvider

Checks whether the this function provider supports any function or not.

Specified by:

supportsFunction in interface FunctionProvider

Parameters:

functionName - the name of the function

parameterTypes - the type of parameters for the function

Returns:

true if function provider supports the function false otherwise

Throws:

ExpressionEngineException - if anything goes wrong

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception