org.opengis.filter
Interface PropertyIsNil

All Superinterfaces:
Filter
All Known Implementing Classes:
IsNilImpl

@XmlElement(value="PropertyIsNil")
public interface PropertyIsNil
extends Filter

Filter operator that checks if an expression's value is nil.

From the specification:

 The PropertyIsNil operator tests the content of the specified property and evaluates if it is nil. 
 The operator can also evaluate the nil reason using the nilReason parameter. The implied operator 
 for evaluating the nil reason is "equals".
 

Since:
GeoAPI 2.0
Author:
Justin Deoliveira, OpenGeo
See Also:
http://portal.opengeospatial.org/files/?artifact_id=39968

Field Summary
static String NAME
          Operator name used to check FilterCapabilities
 
Fields inherited from interface Filter
EXCLUDE, INCLUDE
 
Method Summary
 Expression getExpression()
          Returns the expression whose value will be checked for null.
 Object getNilReason()
          The nil reason.
 
Methods inherited from interface Filter
accept, evaluate
 

Field Detail

NAME

static final String NAME
Operator name used to check FilterCapabilities

See Also:
Constant Field Values
Method Detail

getExpression

@XmlElement(value="expression")
Expression getExpression()
Returns the expression whose value will be checked for null.


getNilReason

@XmlElement(value="nilReason")
Object getNilReason()
The nil reason.



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