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Diffstat (limited to 'install/ui/src/freeipa/_base/Builder.js')
| -rw-r--r-- | install/ui/src/freeipa/_base/Builder.js | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/install/ui/src/freeipa/_base/Builder.js b/install/ui/src/freeipa/_base/Builder.js new file mode 100644 index 000000000..d7503526b --- /dev/null +++ b/install/ui/src/freeipa/_base/Builder.js @@ -0,0 +1,157 @@ +/* Authors: + * Petr Vobornik <pvoborni@redhat.com> + * + * Copyright (C) 2012 Red Hat + * see file 'COPYING' for use and warranty information + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +define(['dojo/_base/declare', + 'dojo/_base/array', + 'dojo/_base/lang', + './construct' + ], function(declare, array, lang, construct) { + + var Builder = declare(null, { + /** + * Builds objects based on specication. + * + * @class + * @name Builder + */ + + /** + * Construct registry + * @property ./Construct_registry + */ + registry: null, + + /** + * Build object based on spec. + * + * @param spec {String|Function|Object} Build spec + * + * String: type name, queries registry + * Function: factory or constructor + * Object: spec object + * + * Build control properies of spec object: + * constructor: Function + * factory: Function + * mixim_spec: Boolean + * type: String + * + * All other properties will be passed to object construction method. + */ + build: function(spec) { + + var cs = this._get_construction_spec(spec); + var obj = this._build(cs); + return obj; + }, + + _get_construction_spec: function(spec) { + + var cs = {}; + + if (typeof spec === 'function') { + // spec constructor or factory + + if (construct.is_constructor(spec)) { + cs.constructor = spec; + } else { + cs.factory = spec; + } + } else if (typeof spec === 'string') { + // spec is type name + cs = this._query_registry(spec); + } else if (typeof spec === 'object') { + var c = spec.constructor, + f = spec.factory, + m = spec.mixim_spec, + t = spec.type; + + var s = lang.clone(spec); + delete s.constructor; + delete s.factory; + delete s.mixim_spec; + delete s.type; + + if (c) { + cs.constructor = c; + cs.spec = s; + } + else if (f) { + cs.factory = f; + cs.spec = s; + } + else if (t) { + cs = this._query_registry(t); + if (cs.spec && m) { + lang.mixin(cs.spec, s); + } else { + cs.spec = s; + } + } + } + + return cs; + }, + + _query_registry: function(type) { + + if (this.registry) { + return this.registry.get(type); + } else { + throw { + error: 'Build error: construct registry required', + spec: type + }; + } + }, + + _build: function(construction_spec) { + + var cs = construction_spec, + obj = null; + + if (cs.factory && typeof cs.factory === 'function') { + obj = cs.factory(cs.spec); + } else if (cs.constructor && typeof cs.constructor === 'function') { + obj = new cs.constructor(cs.spec); + } else { + throw { + error: 'Build error: missing or invalid constructor or factory', + spec: cs + }; + } + + return obj; + }, + + /** + * Constructor + * + * set spec.registry to use Construct_registry instance + */ + constructor: function(spec) { + + spec = spec || {}; + if (spec.registry) this.registry = spec.registry; + } + }); + + return Builder; +});
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