cdx.scorebot.scoring.logic
Class Expression

java.lang.Object
  cdx.scorebot.scoring.logic.Expression

All Implemented Interfaces:

LogicCode, LogicCodeEvaluatable, PrimaryExpressionType

public class Expression
extends java.lang.Object
implements LogicCodeEvaluatable, PrimaryExpressionType

holds an expression which evaluates to a value

Author:

David Underhill

Constructor Summary

Expression(ExpressionType expType)
instantiate an expression

Method Summary

Literal	evaluateLogic(Context context) evaluate this expression in the specified context
LiteralType	evaluateTypeOnly(java.util.HashMap<java.lang.String,LiteralType> varTypes, java.util.HashMap<java.lang.String,TestData> testsInfo) returns the kind of literal this evaluates to
ExpressionType	getExpType()

Methods inherited from class java.lang.Object

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

Constructor Detail

Expression

public Expression(ExpressionType expType)

instantiate an expression

Parameters:

expType - the expression this holds

Method Detail

evaluateLogic

public Literal evaluateLogic(Context context)
                      throws LogicException

evaluate this expression in the specified context

Specified by:

evaluateLogic in interface LogicCodeEvaluatable

Parameters:

context - contains the current context of the logic processor

Returns:

the literal value this expression evaluates to

Throws:

LogicException - thrown if an exception occurs while processing the logic

evaluateTypeOnly

public LiteralType evaluateTypeOnly(java.util.HashMap<java.lang.String,LiteralType> varTypes,
                                    java.util.HashMap<java.lang.String,TestData> testsInfo)
                             throws LogicException

Description copied from interface: LogicCodeEvaluatable

returns the kind of literal this evaluates to

Specified by:

evaluateTypeOnly in interface LogicCodeEvaluatable

Parameters:

varTypes - contains the type of value stored by each variable (variables names are keys)

testsInfo - information about each test item keyed on test item names this logic may hold

Returns:

the LiteralType this evaluates to

Throws:

LogicException - thrown if there is a problem with type which prevents this from being evaluated

getExpType

public ExpressionType getExpType()