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/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Filter.js
*/
/**
* Class: OpenLayers.Filter.Spatial
* This class represents a spatial filter.
* Currently implemented: BBOX, DWithin and Intersects
*
* Inherits from:
* - <OpenLayers.Filter>
*/
OpenLayers.Filter.Spatial = OpenLayers.Class(OpenLayers.Filter, {
/**
* APIProperty: type
* {String} Type of spatial filter.
*
* The type should be one of:
* - OpenLayers.Filter.Spatial.BBOX
* - OpenLayers.Filter.Spatial.INTERSECTS
* - OpenLayers.Filter.Spatial.DWITHIN
* - OpenLayers.Filter.Spatial.WITHIN
* - OpenLayers.Filter.Spatial.CONTAINS
*/
type: null,
/**
* APIProperty: property
* {String} Name of the context property to compare.
*/
property: null,
/**
* APIProperty: value
* {<OpenLayers.Bounds> || <OpenLayers.Geometry>} The bounds or geometry
* to be used by the filter. Use bounds for BBOX filters and geometry
* for INTERSECTS or DWITHIN filters.
*/
value: null,
/**
* APIProperty: distance
* {Number} The distance to use in a DWithin spatial filter.
*/
distance: null,
/**
* APIProperty: distanceUnits
* {String} The units to use for the distance, e.g. 'm'.
*/
distanceUnits: null,
/**
* Constructor: OpenLayers.Filter.Spatial
* Creates a spatial filter.
*
* Parameters:
* options - {Object} An optional object with properties to set on the
* filter.
*
* Returns:
* {<OpenLayers.Filter.Spatial>}
*/
/**
* Method: evaluate
* Evaluates this filter for a specific feature.
*
* Parameters:
* feature - {<OpenLayers.Feature.Vector>} feature to apply the filter to.
*
* Returns:
* {Boolean} The feature meets filter criteria.
*/
evaluate: function(feature) {
var intersect = false;
switch(this.type) {
case OpenLayers.Filter.Spatial.BBOX:
case OpenLayers.Filter.Spatial.INTERSECTS:
if(feature.geometry) {
var geom = this.value;
if(this.value.CLASS_NAME == "OpenLayers.Bounds") {
geom = this.value.toGeometry();
}
if(feature.geometry.intersects(geom)) {
intersect = true;
}
}
break;
default:
throw new Error('evaluate is not implemented for this filter type.');
}
return intersect;
},
/**
* APIMethod: clone
* Clones this filter.
*
* Returns:
* {<OpenLayers.Filter.Spatial>} Clone of this filter.
*/
clone: function() {
var options = OpenLayers.Util.applyDefaults({
value: this.value && this.value.clone && this.value.clone()
}, this);
return new OpenLayers.Filter.Spatial(options);
},
CLASS_NAME: "OpenLayers.Filter.Spatial"
});
OpenLayers.Filter.Spatial.BBOX = "BBOX";
OpenLayers.Filter.Spatial.INTERSECTS = "INTERSECTS";
OpenLayers.Filter.Spatial.DWITHIN = "DWITHIN";
OpenLayers.Filter.Spatial.WITHIN = "WITHIN";
OpenLayers.Filter.Spatial.CONTAINS = "CONTAINS";
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