Style Intelligence v12.0

inetsoft.uql.path.expr
Class ExistsExpr

java.lang.Object
  extended by inetsoft.uql.path.ConditionExpression
      extended by inetsoft.uql.path.expr.Expr
          extended by inetsoft.uql.path.expr.ExistsExpr
All Implemented Interfaces:
Serializable

public class ExistsExpr
extends Expr

Check if a value is null or an empty list.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class inetsoft.uql.path.ConditionExpression
ALL, ANY, SOME
 
Constructor Summary
ExistsExpr(Expr expr1)
          Create an exists expression.
 
Method Summary
 Object execute(XNode tree, VariableTable vars)
          Execute the expression on a data tree.
 Expr getExpression()
          Get the value expression.
 Expr[] getExpressions()
          Get the expressions used in this expr.
 String[] getVariables()
          Get all variables used in the condition.
 String toString()
           
 String toStringNot()
           
 
Methods inherited from class inetsoft.uql.path.expr.Expr
aggregate, append, booleanValue, compare, compare, doubleValue, getScalar, getScalarString, toArray, toString, toVector
 
Methods inherited from class inetsoft.uql.path.ConditionExpression
parse
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ExistsExpr

public ExistsExpr(Expr expr1)
Create an exists expression.

Method Detail

getExpression

public Expr getExpression()
Get the value expression.


getVariables

public String[] getVariables()
Get all variables used in the condition.

Overrides:
getVariables in class Expr

execute

public Object execute(XNode tree,
                      VariableTable vars)
               throws Exception
Execute the expression on a data tree.

Specified by:
execute in class ConditionExpression
Parameters:
tree - data tree.
vars - variable table.
Throws:
Exception

getExpressions

public Expr[] getExpressions()
Get the expressions used in this expr. This is used for traversal down the expr tree.

Specified by:
getExpressions in class Expr

toString

public String toString()
Overrides:
toString in class Object

toStringNot

public String toStringNot()
Overrides:
toStringNot in class Expr

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