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/* 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 Construct_registry = declare(null, {
/**
* Registry for storing construction specification.
* @class
* @name Construct_registry
*/
/**
* Internal map for construction specifications.
* @protected
*/
_map: null,
/**
* Registers construction specification
*
* @param type {String|Object} type or construction spec
* @param func {Function} ctor or factory function
* @param [default_spec] {Object} default spec object for given type
*
* @returns Object
*
* Examples:
*
* May be defined by single construction spec object:
* var construction_spec = {
* type: String,
* factory: Function,
* ctor: Function,
* spec: Object,
* pre_ops: [],
* post_ops: []
* };
* register(construction_spec);
*
* or by defining them separately as params:
* register(type, factory|ctor, spec);
*/
register: function(type, func, default_spec) {
var cs, f, c;
if (typeof type === 'object') {
cs = type;
} else {
construct.is_ctor(func) ? c = func : f = func;
cs = {
type: type,
factory: f,
ctor: c,
spec: default_spec
};
}
if (!cs.pre_ops) cs.pre_ops = [];
if (!cs.post_ops) cs.post_ops = [];
this._check_spec(cs);
this._map[cs.type] = cs;
return cs;
},
/**
* Makes a copy of construct specification of original type. Extends
* it with values in supplied construct specification.
*
* @param {String} Original type
* @param {String} New type
* @param {Object} Construction specification
*/
copy: function(org_type, new_type, construct_spec) {
var def_cs = construct_spec;
var old_cs = this._check_get(org_type);
var cs = construct.clone(old_cs);
cs.type = new_type;
if (def_cs.pre_ops) cs.pre_ops.push.call(cs.pre_ops, def_cs.pre_ops);
if (def_cs.post_ops) cs.post_ops.push.call(cs.post_ops, def_cs.post_ops);
if (def_cs.factory) cs.factory = def_cs.factory;
if (def_cs.ctor) cs.ctor = def_cs.ctor;
if (def_cs.spec) {
cs.spec = cs.spec || {};
lang.mixin(cs.spec, def_cs.spec);
}
this._check_spec(cs);
this._map[cs.type] = cs;
return cs;
},
/**
* Registers pre operation.
*
* Purpose of pre operation is to modify spec object before build
* operation.
*
* When op is Function it gets called with spec as a param and should
* return modified spec.
*
* When op is Object, the object gets mixed in into spec.
*
* @param {type} type
* @param {Function|Object} op
* @param {Boolean} move op to first position
*/
register_pre_op: function(type, op, first) {
var cs = this._check_get(type);
if (first) cs.pre_ops.unshift(op);
else cs.pre_ops.push(op);
},
/**
* Registers post operation.
*
* Purpose of post operation is to modify built object.
*
* When op is Function it gets called with built object as a param
* and should return modified obj.
*
* When op is Object, the object gets mixed in into built object. Use
* with caution.
*
* @param {type} type
* @param {Function|Object} op
* @param {Boolean} move op to first position
*/
register_post_op: function(type, op, first) {
var cs = this._check_get(type);
if (first) cs.post_ops.unshift(op);
else cs.post_ops.push(op);
},
/**
* Gets construction specification for given type.
*
* @param type {String} Type name
* @returns Object|null
*/
get: function(type) {
return this._map[type] || null;
},
_check_get: function(type) {
var cs = this.get(type);
if (!cs) throw construct.no_cs_for_type_error(type);
return cs;
},
_check_spec: function(spec) {
if (typeof spec.type !== 'string' || spec.type === '') {
throw 'Argument exception: Invalid type';
}
if (!lang.isArrayLike(spec.pre_ops)) {
throw 'Argument exception: Invalid pre_ops type.';
}
if (!lang.isArrayLike(spec.post_ops)) {
throw 'Argument exception: Invalid post_ops type.';
}
},
constructor: function(spec) {
this._map = {};
}
});
return Construct_registry;
});
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