com.espertech.esper.client.soda
Class PropertyExistsExpression

java.lang.Object
  extended by com.espertech.esper.client.soda.ExpressionBase
      extended by com.espertech.esper.client.soda.PropertyExistsExpression
All Implemented Interfaces:
Expression, Serializable

public class PropertyExistsExpression
extends ExpressionBase

Property-exists checks if a dynamic property exists.

See Also:
Serialized Form

Constructor Summary
PropertyExistsExpression()
          Ctor - for use to create an expression tree, without child expression.
PropertyExistsExpression(String propertyName)
          Ctor.
 
Method Summary
 void toEPL(StringWriter writer)
          Renders the clause in textual representation.
 
Methods inherited from class com.espertech.esper.client.soda.ExpressionBase
addChild, getChildren
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

PropertyExistsExpression

public PropertyExistsExpression()
Ctor - for use to create an expression tree, without child expression.


PropertyExistsExpression

public PropertyExistsExpression(String propertyName)
Ctor.

Parameters:
propertyName - is the name of the property to check existence
Method Detail

toEPL

public void toEPL(StringWriter writer)
Renders the clause in textual representation.

Parameters:
writer - to output to

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