com.whitestein.lsps.lang.operation

Interface Operation<R>

Type Parameters:

R - type of execution result

All Known Subinterfaces:

ReferencedOperation

All Known Implementing Classes:

BooleanOperation, CollectionOperation, ComparisonOperation, DateOperation, DecimalBinaryArithmeticOperation, DecimalBinaryComparisonOperation, DecimalUnaryOperation, DocumentSignatureGeneration.DocOperation, EnumerationOperation, ErrorOperation, ExpressionOperation, IntegerBinaryArithmeticOperation, IntegerUnaryOperation, JavaOperation, MapOperation, ObjectOperation, RangeOperation, RoleUnitFunctionOperation, StringComparisonOperation, StringLikeOperation, StringOperation

public interface Operation<R>

Interface representing executable operation. The operation must know its return type.

Author:

rba

Method Summary

Modifier and Type	Method and Description
R	execute(Interpreter interpreter, Expression parent, List<Expression> args, boolean variadicArgAsList, InterpreterStackTrace stackTrace) Executes the expression.

Method Detail

execute

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

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.

Parameters:

interpreter -

parent - an optional parent expression, may be null

args -

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