jaitools.jiffle.parser
Class FunctionLookup

java.lang.Object
  jaitools.jiffle.parser.FunctionLookup

public class FunctionLookup
extends Object

A lookup service used by the Jiffle compiler when parsing function calls in scripts.

Since:

1.1

Version:

$Id: FunctionLookup.java 1473 2011-02-28 10:30:48Z michael.bedward $

Author:

Michael Bedward

Constructor Summary

FunctionLookup()

Method Summary

static FunctionInfo	getInfo(String jiffleName, List<String> argTypes) Gets the info for a function.
static String	getReturnType(String jiffleName) Searches for a function with a script name that matches jiffleName and gets its return type.
static String	getRuntimeExpr(String jiffleName, List<String> argTypes) Gets the runtime source for the function.
static boolean	isDefined(String jiffleName, List<String> argTypes) Checks if a function is defined.

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionLookup

public FunctionLookup()

Method Detail

isDefined

public static boolean isDefined(String jiffleName,
                                List<String> argTypes)

Checks if a function is defined.

Parameters:

jiffleName - the name of the function used in a Jiffle script

argTypes - argument type names; null or empty for no-arg functions

Returns:

true if defined; false otherwise

getInfo

public static FunctionInfo getInfo(String jiffleName,
                                   List<String> argTypes)
                            throws UndefinedFunctionException

Gets the info for a function.

Parameters:

jiffleName - the name of the function used in a Jiffle script

argTypes - argument type names; null or empty for no-arg functions

Returns:

function info

Throws:

UndefinedFunctionException - if jiffleName is not recognized

getRuntimeExpr

public static String getRuntimeExpr(String jiffleName,
                                    List<String> argTypes)
                             throws UndefinedFunctionException

Gets the runtime source for the function. This will consist of provider name plus function name in the case of JiffleFunction and java.lang.Math methods, or runtime class field name in the case of proxy (image info) functions.

Parameters:

jiffleName - the name of the function used in a Jiffle script

argTypes - argument type names; null or empty for no-arg functions

Returns:

the runtime source

Throws:

UndefinedFunctionException - if jiffleName is not recognized

getReturnType

public static String getReturnType(String jiffleName)
                            throws UndefinedFunctionException

Searches for a function with a script name that matches jiffleName and gets its return type. This method relies on the fact that Jiffle has the same return type for all functions with the same root name.

Parameters:

jiffleName - name to match

Returns:

the return type: D or List

Throws:

UndefinedFunctionException - if the name is not matched