/**
+ * @class Ext.AbstractManager
+ * @extends Object
+ * @ignore
+ * Base Manager class
+ */
+
+Ext.define('Ext.AbstractManager', {
+
+ /* Begin Definitions */
+
+ requires: ['Ext.util.HashMap'],
+
+ /* End Definitions */
+
+ typeName: 'type',
+
+ constructor: function(config) {
+ Ext.apply(this, config || {});
+
+ /**
+ * Contains all of the items currently managed
+ * @property all
+ * @type Ext.util.MixedCollection
+ */
+ this.all = Ext.create('Ext.util.HashMap');
+
+ this.types = {};
+ },
+
+ /**
+ * Returns an item by id.
+ * For additional details see {@link Ext.util.HashMap#get}.
+ * @param {String} id The id of the item
+ * @return {Mixed} The item, <code>undefined</code> if not found.
+ */
+ get : function(id) {
+ return this.all.get(id);
+ },
+
+ /**
+ * Registers an item to be managed
+ * @param {Mixed} item The item to register
+ */
+ register: function(item) {
+ this.all.add(item);
+ },
+
+ /**
+ * Unregisters an item by removing it from this manager
+ * @param {Mixed} item The item to unregister
+ */
+ unregister: function(item) {
+ this.all.remove(item);
+ },
+
+ /**
+ * <p>Registers a new item constructor, keyed by a type key.
+ * @param {String} type The mnemonic string by which the class may be looked up.
+ * @param {Constructor} cls The new instance class.
+ */
+ registerType : function(type, cls) {
+ this.types[type] = cls;
+ cls[this.typeName] = type;
+ },
+
+ /**
+ * Checks if an item type is registered.
+ * @param {String} type The mnemonic string by which the class may be looked up
+ * @return {Boolean} Whether the type is registered.
+ */
+ isRegistered : function(type){
+ return this.types[type] !== undefined;
+ },
+
+ /**
+ * Creates and returns an instance of whatever this manager manages, based on the supplied type and config object
+ * @param {Object} config The config object
+ * @param {String} defaultType If no type is discovered in the config object, we fall back to this type
+ * @return {Mixed} The instance of whatever this manager is managing
+ */
+ create: function(config, defaultType) {
+ var type = config[this.typeName] || config.type || defaultType,
+ Constructor = this.types[type];
+
+ //<debug>
+ if (Constructor == undefined) {
+ Ext.Error.raise("The '" + type + "' type has not been registered with this manager");
+ }
+ //</debug>
+
+ return new Constructor(config);
+ },
+
+ /**
+ * Registers a function that will be called when an item with the specified id is added to the manager. This will happen on instantiation.
+ * @param {String} id The item id
+ * @param {Function} fn The callback function. Called with a single parameter, the item.
+ * @param {Object} scope The scope (<code>this</code> reference) in which the callback is executed. Defaults to the item.
+ */
+ onAvailable : function(id, fn, scope){
+ var all = this.all,
+ item;
+
+ if (all.containsKey(id)) {
+ item = all.get(id);
+ fn.call(scope || item, item);
+ } else {
+ all.on('add', function(map, key, item){
+ if (key == id) {
+ fn.call(scope || item, item);
+ all.un('add', fn, scope);
+ }
+ });
+ }
+ },
+
+ /**
+ * Executes the specified function once for each item in the collection.
+ * Returning false from the function will cease iteration.
+ *
+ * The paramaters passed to the function are:
+ * <div class="mdetail-params"><ul>
+ * <li><b>key</b> : String<p class="sub-desc">The key of the item</p></li>
+ * <li><b>value</b> : Number<p class="sub-desc">The value of the item</p></li>
+ * <li><b>length</b> : Number<p class="sub-desc">The total number of items in the collection</p></li>
+ * </ul></div>
+ * @param {Object} fn The function to execute.
+ * @param {Object} scope The scope to execute in. Defaults to <tt>this</tt>.
+ */
+ each: function(fn, scope){
+ this.all.each(fn, scope || this);
+ },
+
+ /**
+ * Gets the number of items in the collection.
+ * @return {Number} The number of items in the collection.
+ */
+ getCount: function(){
+ return this.all.getCount();
+ }
+});
+