com.whitestein.lsps.lang.operation

Class JavaOperation

java.lang.Object

com.whitestein.lsps.lang.operation.JavaOperation

All Implemented Interfaces:

Operation

public class JavaOperation
extends Object
implements Operation

Method implemented by a java function. The function is specified by its class name and its method name.

Author:

rba

Constructor Summary

Constructors

Constructor and Description
JavaOperation(String className, String methodName, FunctionSignature signature) Creates new instance of JavaOperation.

Method Summary

Modifier and Type	Method and Description
Object	execute(Interpreter interpreter, List<Expression> args, boolean variadicArgAsList, InterpreterStackTrace stackTrace) Executes the expression.
Class<?>[]	getArgClasses() Returns argument classes
String	getClassName() Returns the class name.
String	getMethodName() Returns the method name.
FunctionSignature	getSignature() Returns the operation signature.

Methods inherited from class java.lang.Object

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

Constructor Detail

JavaOperation

public JavaOperation(String className,
                     String methodName,
                     FunctionSignature signature)

Creates new instance of JavaOperation.

Parameters:

className -

methodName -

signature -

Throws:

NullPointerException - if any of the arguments is null

Method Detail

execute

public Object execute(Interpreter interpreter,
                      List<Expression> args,
                      boolean variadicArgAsList,
                      InterpreterStackTrace stackTrace)
               throws ErrorException

Description copied from interface: Operation

Executes the expression. The operation gets the interpreter and argument expressions instead of getting evaluated arguments. This can be used for late argument evaluation or not evaluating them at all.

Specified by:

execute in interface Operation

variadicArgAsList - if true, the variadic argument is given as expression returning a list; if false, the variadic argument is given as several individual expressions

stackTrace - a stack trace passed to the interpreter

Returns:

the result of the operation

Throws:

ErrorException

getArgClasses

public Class<?>[] getArgClasses()

Returns argument classes

Returns:

argument classes

getClassName

public String getClassName()

Returns the class name.

Returns:

the class name

getMethodName

public String getMethodName()

Returns the method name.

Returns:

the method name

getSignature

public FunctionSignature getSignature()

Returns the operation signature.

Returns:

the operation signature