org.omegahat.Environment.Interpreter
Class Task

java.lang.Object
  |
  +--org.omegahat.Environment.Interpreter.Task

public class Task

extends java.lang.Object

This class represents a task for the Evaluator. This is made up of one or both of a string representing the command(s) and an ExpressionInt object. The result is an object created by evaluating the ExpressionInt. Given the text, this class can produce the other two. One can create the ExpressionInt programmatically or via some different parsing mechanism, etc. and supply it to this object.

The idea is to use this object in both the history list of an evaluator and also its TaskQueue.

This should really be called an ExpressionTask or InterpreterTask.

Field Summary

protected java.lang.Throwable	error
protected ExpressionInt	expression
protected java.lang.String	taskString
protected java.lang.Object	value

Constructor Summary

Task()

Task(ExpressionInt expr)

Task(java.lang.String input)

Task(java.lang.String input, ExpressionInt expr)

Method Summary

protected java.lang.Throwable	error()
protected java.lang.Throwable	error(java.lang.Throwable e)
java.lang.Object	evaluate(Evaluator evaluator)
ExpressionInt	expression()
ExpressionInt	expression(ExpressionInt e)
omegaJavaLexer	lexer()
omegaJavaLexer	lexer(java.lang.String str)
ExpressionInt	parse()
java.lang.String	taskString()
java.lang.String	taskString(java.lang.String str)
java.lang.Object	value()
java.lang.Object	value(java.lang.Object val)

Methods inherited from class java.lang.Object

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

Field Detail

expression

protected ExpressionInt expression

taskString

protected java.lang.String taskString

value

protected java.lang.Object value

error

protected java.lang.Throwable error

Constructor Detail

Task

public Task()

Task

public Task(java.lang.String input)

Task

public Task(java.lang.String input,
            ExpressionInt expr)

Task

public Task(ExpressionInt expr)

Method Detail

lexer

public omegaJavaLexer lexer()

lexer

public omegaJavaLexer lexer(java.lang.String str)

evaluate

public java.lang.Object evaluate(Evaluator evaluator)
                          throws java.lang.Throwable

parse

public ExpressionInt parse()
                    throws java.lang.Exception

expression

public ExpressionInt expression()

expression

public ExpressionInt expression(ExpressionInt e)

taskString

public java.lang.String taskString()

taskString

public java.lang.String taskString(java.lang.String str)

value

public java.lang.Object value()

value

public java.lang.Object value(java.lang.Object val)

error

protected java.lang.Throwable error()

error

protected java.lang.Throwable error(java.lang.Throwable e)