org.deegree.filter
Class Filters

java.lang.Object
  org.deegree.filter.Filters

public class Filters
extends Object

Various static methods for performing standard tasks on Filter objects.

Version:

$Revision: 31658 $, $Date: 2011-08-25 20:09:40 +0200 (Thu, 25 Aug 2011) $

Author:

Markus Schneider, last edited by: $Author: mschneider $

See Also:

Filter

Constructor Summary

Filters()

Method Summary

static Filter	addBBoxConstraint(Envelope bbox, Filter filter, ValueReference propName) Adds a bounding box constraint to the given Filter.
static Geometry[]	getGeometries(Filter filter) Returns all Geometry-values contained in the given Filter (taking nesting into account).
static ValueReference[]	getPropertyNames(Filter filter) Returns all ValueReferences contained in the given Filter (taking nesting into account).
static void	setDefaultCRS(Filter filter, ICRS crs) Sets the CRS for all geometries contained in the given Filter that do not have crs information.
static Pair<Filter,Envelope>	splitOffBBoxConstraint(Filter filter)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Filters

public Filters()

Method Detail

addBBoxConstraint

public static Filter addBBoxConstraint(Envelope bbox,
                                       Filter filter,
                                       ValueReference propName)

Adds a bounding box constraint to the given Filter.

Parameters:

bbox - bounding box, can be null

filter - filter expression, can be null

propName - can be null

Returns:

combined filter or null (if bbox and filter are null)

splitOffBBoxConstraint

public static Pair<Filter,Envelope> splitOffBBoxConstraint(Filter filter)

Parameters:

filter - can be null

Returns:

the reverse of #addBBoxConstraint

getPropertyNames

public static ValueReference[] getPropertyNames(Filter filter)

Returns all ValueReferences contained in the given Filter (taking nesting into account).

Parameters:

filter - filter to be traversed, must not be null

Returns:

ValueReferences found on any nodes of the Filter, can be empty, but never null

getGeometries

public static Geometry[] getGeometries(Filter filter)

Returns all Geometry-values contained in the given Filter (taking nesting into account).

Parameters:

filter - filter to be traversed, must not be null

Returns:

Geometrys found on any nodes of the Filter, can be empty, but never null

setDefaultCRS

public static void setDefaultCRS(Filter filter,
                                 ICRS crs)

Sets the CRS for all geometries contained in the given Filter that do not have crs information.

Parameters:

filter - filter to process, must not be null

crs - crs to set, must not be null