io.rapidpro.expressions.functions

Class FunctionManager

java.lang.Object

io.rapidpro.expressions.functions.FunctionManager

public class FunctionManager
extends Object

Manages the loaded function libraries

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FunctionManager.FunctionDescriptor

Constructor Summary

Constructors

Constructor and Description
FunctionManager()

Method Summary

Modifier and Type	Method and Description
void	addLibrary(Class<?> library) Adds functions from a library class
List<FunctionManager.FunctionDescriptor>	buildListing() Builds a listing of all functions sorted A-Z.
Method	getFunction(String name)
Object	invokeFunction(EvaluationContext ctx, String name, List<Object> args) Invokes a function

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionManager

public FunctionManager()

Method Detail

addLibrary

public void addLibrary(Class<?> library)

Adds functions from a library class

Parameters:

library - the library class

getFunction

public Method getFunction(String name)

invokeFunction

public Object invokeFunction(EvaluationContext ctx,
                             String name,
                             List<Object> args)

Invokes a function

Parameters:

ctx - the evaluation context

name - the function name (case insensitive)

args - the arguments to be passed to the function

Returns:

the function return value

buildListing

public List<FunctionManager.FunctionDescriptor> buildListing()

Builds a listing of all functions sorted A-Z. Unlike the Python port, this only returns function names as Java doesn't so easily support reading of docstrings and Java 7 doesn't provide access to parameter names.

Returns:

the function listing