com.scriptbasic.interfaces

Interface Command

All Superinterfaces:

AnalysisResult, Executor

All Known Implementing Classes:

AbstractCommand, AbstractCommandExpressionListed, AbstractCommandIfElseKind, AbstractCommandIfKind, AbstractCommandLeftValueListed, CommandCall, CommandElse, CommandElseIf, CommandEndIf, CommandEndSub, CommandFor, CommandGlobal, CommandIf, CommandLet, CommandLocal, CommandMethod, CommandNext, CommandPrint, CommandReturn, CommandSub, CommandUse, CommandWend, CommandWhile

public interface Command
extends AnalysisResult, Executor

Classes that provide methods to execute a command implement this interface.

Since the objects are created as a result of the BASIC program analysis any command is also an AnalysisResult.

The implementing classes contain the execution code of the different program commands, like 'for', 'if' and so on.

These objects are multitons, do not contain any runtime data, since many interpreters may execute the same program at the same time. The code also has to be thread safe.

The data that may be stored in a command is referential data to other Commands that are in the same program. For example a command implementing 'while' may have a program counter that points to the corresponding 'wend', but should not contain any data that holds the value of the expression evaluated.

Author:

Peter Verhas

Method Summary

Methods

Modifier and Type	Method and Description
void	checkedExecute(ExtendedInterpreter interpreter)
Command	getNextCommand()

Methods inherited from interface com.scriptbasic.interfaces.Executor

execute

Method Detail

getNextCommand

Command getNextCommand()

checkedExecute

void checkedExecute(ExtendedInterpreter interpreter)
                    throws ExecutionException

Throws:

ExecutionException