cdx.scorebot.scoring.logic
Class Expression

java.lang.Object
  extended by 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()