edu.wpi.cs.dsrg.xmldb.xat.common.operator.specialoperator.function
Class FunEXISTS

java.lang.Object
  |
  +--edu.wpi.cs.dsrg.xmldb.xat.common.operator.specialoperator.function.FunCall
        |
        +--edu.wpi.cs.dsrg.xmldb.xat.common.operator.specialoperator.function.FunEXISTS

public class FunEXISTS
extends FunCall

The FunEXISTS class.

Since:
1.0

Constructor Summary
FunEXISTS()
           
 
Method Summary
 java.lang.Object exec(java.util.Vector deRefParamV)
          Exist function takes only one parameter, e.g., the column name.
 
Methods inherited from class edu.wpi.cs.dsrg.xmldb.xat.common.operator.specialoperator.function.FunCall
eval, iterator
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FunEXISTS

public FunEXISTS()
Method Detail

exec

public java.lang.Object exec(java.util.Vector deRefParamV)
                      throws java.lang.Exception
Exist function takes only one parameter, e.g., the column name. Hence, if there are more than one parameters passed, exception should be thrown.
Overrides:
exec in class FunCall
Parameters:
deRefParamV - are the parameters
Returns:
the result of execution.
Throws:
java.lang.Exception -  
Since:
1.0