org.opengis.filter
Interface FilterVisitor


@Extension
public interface FilterVisitor

Visitor with visit methods to be called by Filter.accept(...).

Consider: It is unclear if this visitor should be applied directly to Filter, or should be walked accross the data structure by hand. The standard complient structure is well defined, and this should negate the need for a formal visitor (we don't have internal structure we are hiding).

There is still a very valid use for FilterVisitor, a instance may implement both FilterVisitor and ExpressionVisitor and ExpressionVisitory in one direction, and a FilterVisitor and a StyleVisitor in the other. The ability to directly focus on transforming data within a larger structure is something a normal data walk can not accomplish in a scalable manner.

Since:
GeoAPI 2.0
Version:
Implementation specification 1.0

Method Summary
 Object visit(And filter, Object extraData)
           
 Object visit(BBOX filter, Object extraData)
           
 Object visit(Beyond filter, Object extraData)
           
 Object visit(Contains filter, Object extraData)
           
 Object visit(Crosses filter, Object extraData)
           
 Object visit(Disjoint filter, Object extraData)
           
 Object visit(DWithin filter, Object extraData)
           
 Object visit(Equals filter, Object extraData)
           
 Object visit(ExcludeFilter filter, Object extraData)
          Visit Filter.EXCLUDE (often used during data structure transformations).
 Object visit(Id filter, Object extraData)
           
 Object visit(IncludeFilter filter, Object extraData)
          Visit Filter.INCLUDE (often used during data structure transformations).
 Object visit(Intersects filter, Object extraData)
           
 Object visit(Not filter, Object extraData)
           
 Object visit(Or filter, Object extraData)
           
 Object visit(Overlaps filter, Object extraData)
           
 Object visit(PropertyIsBetween filter, Object extraData)
           
 Object visit(PropertyIsEqualTo filter, Object extraData)
           
 Object visit(PropertyIsGreaterThan filter, Object extraData)
           
 Object visit(PropertyIsGreaterThanOrEqualTo filter, Object extraData)
           
 Object visit(PropertyIsLessThan filter, Object extraData)
           
 Object visit(PropertyIsLessThanOrEqualTo filter, Object extraData)
           
 Object visit(PropertyIsLike filter, Object extraData)
           
 Object visit(PropertyIsNotEqualTo filter, Object extraData)
           
 Object visit(PropertyIsNull filter, Object extraData)
           
 Object visit(Touches filter, Object extraData)
           
 Object visit(Within filter, Object extraData)
           
 Object visitNullFilter(Object extraData)
          Used to account for a null filter value.
 

Method Detail

visitNullFilter

Object visitNullFilter(Object extraData)
Used to account for a null filter value.

This is particularly used during data structure transofrmations, however the use of null is not recommended. Please make use of Filter.NONE and Filter.ALL as placeholder objects that communicate intent.

Parameters:
extraData - Value object provided to visitor
Returns:
subclass defined

visit

Object visit(ExcludeFilter filter,
             Object extraData)
Visit Filter.EXCLUDE (often used during data structure transformations).

Parameters:
filter - Filter.EXCLUDE.
extraData - Value object provided to visitor
Returns:
subclass supplied

visit

Object visit(IncludeFilter filter,
             Object extraData)
Visit Filter.INCLUDE (often used during data structure transformations).

Parameters:
filter - Filter.INCLUDE.
extraData - Value object provided to visitor
Returns:
subclass supplied

visit

Object visit(And filter,
             Object extraData)

visit

Object visit(Id filter,
             Object extraData)

visit

Object visit(Not filter,
             Object extraData)

visit

Object visit(Or filter,
             Object extraData)

visit

Object visit(PropertyIsBetween filter,
             Object extraData)

visit

Object visit(PropertyIsEqualTo filter,
             Object extraData)

visit

Object visit(PropertyIsNotEqualTo filter,
             Object extraData)

visit

Object visit(PropertyIsGreaterThan filter,
             Object extraData)

visit

Object visit(PropertyIsGreaterThanOrEqualTo filter,
             Object extraData)

visit

Object visit(PropertyIsLessThan filter,
             Object extraData)

visit

Object visit(PropertyIsLessThanOrEqualTo filter,
             Object extraData)

visit

Object visit(PropertyIsLike filter,
             Object extraData)

visit

Object visit(PropertyIsNull filter,
             Object extraData)

visit

Object visit(BBOX filter,
             Object extraData)

visit

Object visit(Beyond filter,
             Object extraData)

visit

Object visit(Contains filter,
             Object extraData)

visit

Object visit(Crosses filter,
             Object extraData)

visit

Object visit(Disjoint filter,
             Object extraData)

visit

Object visit(DWithin filter,
             Object extraData)

visit

Object visit(Equals filter,
             Object extraData)

visit

Object visit(Intersects filter,
             Object extraData)

visit

Object visit(Overlaps filter,
             Object extraData)

visit

Object visit(Touches filter,
             Object extraData)

visit

Object visit(Within filter,
             Object extraData)


Copyright © 1994-2008 Open Geospatial Consortium. All Rights Reserved.