/**
 * @class Ext.ComponentManager
 * @extends Ext.AbstractManager
 * <p>Provides a registry of all Components (instances of {@link Ext.Component} or any subclass
 * thereof) on a page so that they can be easily accessed by {@link Ext.Component component}
 * {@link Ext.Component#id id} (see {@link #get}, or the convenience method {@link Ext#getCmp Ext.getCmp}).</p>
 * <p>This object also provides a registry of available Component <i>classes</i>
 * indexed by a mnemonic code known as the Component's {@link Ext.Component#xtype xtype}.
 * The <code>xtype</code> provides a way to avoid instantiating child Components
 * when creating a full, nested config object for a complete Ext page.</p>
 * <p>A child Component may be specified simply as a <i>config object</i>
 * as long as the correct <code>{@link Ext.Component#xtype xtype}</code> is specified so that if and when the Component
 * needs rendering, the correct type can be looked up for lazy instantiation.</p>
 * <p>For a list of all available <code>{@link Ext.Component#xtype xtypes}</code>, see {@link Ext.Component}.</p>
 * @singleton
 */

Ext.define('Ext.ComponentManager', {
    extend
: 'Ext.AbstractManager',
    alternateClassName
: 'Ext.ComponentMgr',
   
    singleton
: true,
   
    typeName
: 'xtype',
   
    /**
     * Creates a new Component from the specified config object using the
     * config object's xtype to determine the class to instantiate.
     * @param {Object} config A configuration object for the Component you wish to create.
     * @param {Constructor} defaultType The constructor to provide the default Component type if
     * the config object does not contain a <code>xtype</code>. (Optional if the config contains a <code>xtype</code>).
     * @return {Ext.Component} The newly instantiated Component.
     */

    create
: function(component, defaultType){
       
if (component instanceof Ext.AbstractComponent) {
           
return component;
       
}
       
else if (Ext.isString(component)) {
           
return Ext.createByAlias('widget.' + component);
       
}
       
else {
           
var type = component.xtype || defaultType,
                config
= component;
           
           
return Ext.createByAlias('widget.' + type, config);
       
}
   
},

    registerType
: function(type, cls) {
       
this.types[type] = cls;
        cls
[this.typeName] = type;
        cls
.prototype[this.typeName] = type;
   
}
});