org.ujac.util.exi.type
Class BaseType.ObjectDefinedOperation

java.lang.Object
  extended by org.ujac.util.exi.BaseExpressionOperation
      extended by org.ujac.util.exi.type.BaseType.ObjectDefinedOperation
All Implemented Interfaces:
ExpressionOperation
Enclosing class:
BaseType

public class BaseType.ObjectDefinedOperation
extends BaseExpressionOperation

Checks the existance of the given object.


Constructor Summary
BaseType.ObjectDefinedOperation()
           
 
Method Summary
 Object evaluate(ExpressionTuple expr, ExpressionContext ctx)
          Evaluates the given values.
 String getDescription()
          Gets a description for the operation.
 
Methods inherited from class org.ujac.util.exi.BaseExpressionOperation
getExamples
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

BaseType.ObjectDefinedOperation

public BaseType.ObjectDefinedOperation()
Method Detail

evaluate

public Object evaluate(ExpressionTuple expr,
                       ExpressionContext ctx)
                throws ExpressionException
Evaluates the given values.

Parameters:
expr - The expression tuple to process.
ctx - The expression context.
Returns:
The result of the tuple evaluation.
Throws:
ExpressionException - If the evaluation failed.

getDescription

public String getDescription()
Gets a description for the operation.

Specified by:
getDescription in interface ExpressionOperation
Overrides:
getDescription in class BaseExpressionOperation
Returns:
The item's description.


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