org.opengis.filter
Interface Filter

All Known Subinterfaces:

And, BBOX, Beyond, BinaryComparisonOperator, BinaryLogicOperator, BinarySpatialOperator, Contains, Crosses, Disjoint, DistanceBufferOperator, DWithin, Equals, FeatureId, Intersects, Not, Or, Overlaps, PropertyIsBetween, PropertyIsEqualTo, PropertyIsGreaterThan, PropertyIsGreaterThanOrEqualTo, PropertyIsLessThan, PropertyIsLessThanOrEqualTo, PropertyIsLike, PropertyIsNull, SpatialOperator, Touches, Within

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

The abstract base class for filters. A filter is used to define a set of feature instances that are to be operated upon. The operating set can be comprised of one or more enumerated features or a set of features defined by specifying spatial and non-spatial constraints on the geometric and scalar properties of a feature type.

Roughly speaking, a filter encodes the information present in the WHERE clause of a SQL statement. There are various subclasses of this class that implement many types of filters, such as simple property comparisons or spatial queries.

Since:

GeoAPI 2.0

Version:

Implementation specification 1.0

Method Summary

Object	accept(FilterVisitor visitor, Object extraData) Accepts a visitor.
boolean	evaluate(Feature feature) Given a feature, this method determines whether the feature passes the test(s) represented by this filter object.

Method Detail

evaluate

@Extension
boolean evaluate(Feature feature)

Given a feature, this method determines whether the feature passes the test(s) represented by this filter object.

accept

@Extension
Object accept(FilterVisitor visitor,
                        Object extraData)

Accepts a visitor. Implementations of all subinterfaces must have with a method whose content is the following:

return visitor.visit(this, extraData);