Dedicated module for projections cache

2016-12-04 10:24:43 -08:00
parent 679fe298aa
commit b54342dfb8
2 changed files with 47 additions and 16 deletions
@@ -0,0 +1,38 @@
+goog.provide('ol.proj.projections');
+
+
+/**
+ * @private
+ * @type {Object.<string, ol.proj.Projection>}
+ */
+ol.proj.projections.cache_ = {};
+
+
+/**
+ * Clear the projections cache.
+ */
+ol.proj.projections.clear = function() {
+  ol.proj.projections.cache_ = {};
+};
+
+
+/**
+ * Get a cached projection by code.
+ * @param {string} code The code for the projection.
+ * @return {ol.proj.Projection} The projection (if cached).
+ */
+ol.proj.projections.get = function(code) {
+  var projections = ol.proj.projections.cache_;
+  return projections[code] || null;
+};
+
+
+/**
+ * Add a projection to the cache.
+ * @param {string} code The projection code.
+ * @param {ol.proj.Projection} projection The projection to cache.
+ */
+ol.proj.projections.add = function(code, projection) {
+  var projections = ol.proj.projections.cache_;
+  projections[code] = projection;
+};