From 9543ce4d4aed24734eb24f8d2f96ae4dbe290155 Mon Sep 17 00:00:00 2001
From: Tim Schaub <tim.schaub@gmail.com>
Date: Mon, 21 Jan 2013 17:57:12 -0700
Subject: [PATCH] Initial filter package, geometry type filtering only for now

---
 src/ol/filter/filter.js         | 17 ++++++++++++
 src/ol/filter/geometryfilter.js | 47 +++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+)
 create mode 100644 src/ol/filter/filter.js
 create mode 100644 src/ol/filter/geometryfilter.js

diff --git a/src/ol/filter/filter.js b/src/ol/filter/filter.js
new file mode 100644
index 0000000000..45f0f3eff8
--- /dev/null
+++ b/src/ol/filter/filter.js
@@ -0,0 +1,17 @@
+goog.provide('ol.filter.Filter');
+
+goog.require('ol.Feature');
+
+
+
+/**
+ * @interface
+ */
+ol.filter.Filter = function() {};
+
+
+/**
+ * @param {ol.Feature} feature Feature to evaluate.
+ * @return {boolean} The provided feature passes this filter.
+ */
+ol.filter.Filter.prototype.evaluate = function(feature) {};
diff --git a/src/ol/filter/geometryfilter.js b/src/ol/filter/geometryfilter.js
new file mode 100644
index 0000000000..f9b46176c7
--- /dev/null
+++ b/src/ol/filter/geometryfilter.js
@@ -0,0 +1,47 @@
+goog.provide('ol.filter.Geometry');
+goog.provide('ol.filter.GeometryType');
+
+goog.require('ol.Feature');
+goog.require('ol.filter.Filter');
+goog.require('ol.geom.GeometryType');
+goog.require('ol.geom.LineString');
+goog.require('ol.geom.MultiLineString');
+goog.require('ol.geom.MultiPoint');
+goog.require('ol.geom.MultiPolygon');
+goog.require('ol.geom.Point');
+goog.require('ol.geom.Polygon');
+
+
+
+/**
+ * @constructor
+ * @implements {ol.filter.Filter}
+ * @param {ol.geom.GeometryType} type The geometry type.
+ */
+ol.filter.Geometry = function(type) {
+
+  /**
+   * @type {ol.geom.GeometryType}
+   * @private
+   */
+  this.type_ = type;
+
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.filter.Geometry.prototype.evaluate = function(feature) {
+  var geometry = feature.getGeometry();
+  return goog.isNull(geometry) ? false : geometry.getType() === this.type_;
+};
+
+
+/**
+ * @return {ol.geom.GeometryType} The geometry type.
+ */
+ol.filter.Geometry.prototype.getType = function() {
+  return this.type_;
+};
+