org.opengis.filter
Interface PropertyIsNull
- All Superinterfaces:
- Filter
@XmlElement(value="PropertyIsNull")
public interface PropertyIsNull
- extends Filter
Filter operator that checks if an expression's value is null
. A null
is equivalent to no value present. The value 0 is a valid value and is not considered
null
.
- Since:
- GeoAPI 2.0
- Version:
- Implementation specification 1.0
getExpression
@XmlElement(value="PropertyName")
Expression getExpression()
- Returns the expression whose value will be checked for
null
.
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