Code coverage report for ./src/main.js

Statements: 97.66% (125 / 128)      Branches: 97.01% (65 / 67)      Functions: 96% (24 / 25)      Lines: 97.66% (125 / 128)      Ignored: none     

All files » ./src\ » main.js
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/**
 * Created by exodia on 14-4-14.
 */
 
void function (define, global, undefined) {
    define(
        function (require) {
            var Container = require('./Container');
            var u = require('./util');
            var Parser = require('./DependencyParser');
            var globalLoader = global.require;
            var creatorWrapper = function (creator, args) {
                return creator.apply(this, args);
            };
 
            function Context(config) {
                config = config || {};
                if (!(this instanceof Context)) {
                    return new Context(config);
                }
 
                this.moduleLoader = config.loader || globalLoader;
                this.parser = new (config.parser || Parser)(this);
                this.components = {};
                this.container = new Container(this);
                this.addComponent(config.components || {});
            }
 
            /**
             * 向容器中注册构件,配置中,args 和 properties 中的每个元素,可以使用 $ref 操作符:
             *      {
             *        args: [ { $ref: 'otherComponent' } ]
             *     }
             *
             * 容器会解析第一层的$ref,从值中获取对应的实例,若实例未注册,返回 null
             *
             *
             * 在 properties 中,可以使用 $setter 操作符:
             *      {
             *          properties: { prop1: { $setter: 'setProp1', value: 'prop1' } }
             *      }
             * 容器会解析第一层的$setter,从值中调用实例的方法,传入属性名和属性值,
             * 若未设置 setter,则使用instance.prop1 = value方式注入值
             *
             *
             * @param {String} id
             * @param {Object} [config]
             * @param {Function | String} config.creator 创建构件的函数或模块名称
             * @param {Boolean=false} config.isFactory 是否为工厂函数,默认false,会通过 new 方式调用,true 时直接调用
             * @param {'transient' | 'singleton' | 'static'} [config.scope = 'transient']
             * 构件作用域,默认为 transient,每次获取构件,都会新建一个实例返回,若为 singleton,则会返回同一个实例
             * 若为 static,则直接返回creator
             *
             * @param {Array} config.args 传递给创建构件函数的参数
             * @param {Object} config.properties 附加给实例的属性
             *      ioc.addComponent('List', {
             *          // 构造函数创建构件 new creator, 或者字符串,字符串则为 amd 模块名
             *          creator: require('./List'),
             *          scope: 'transient',
             *          args: [
             *              {
             *                   $ref: 'entityName'
             *              }
             *          ],
             *
             *          // 属性注入, 不设置$setter, 则直接instance.xxx = xxx
             *          properties: {
             *              model: { $ref: 'ListModel' },
             *              view: { $ref: 'ListView' },
             *              name: 'xxxx'
             *          }
             *      });
             */
            Context.prototype.addComponent = function (id, config) {
                if (typeof id === 'object') {
                    for (var k in id) {
                        this.addComponent(k, id[k]);
                    }
                } else {
                    var component = this.components[id];
                    Iif (component) {
                        u.warn(id + ' has been add! This will be no effect');
                        return;
                    }
 
                    this.components[id] = createComponent.call(this, id, config);
                }
            };
 
            Context.prototype.getComponent = function (ids, cb) {
                ids = ids instanceof Array ? ids : [ids];
                var needModules = {};
                var me = this;
                var parser = me.parser;
                for (var i = 0, len = ids.length; i < len; ++i) {
                    var type = ids[i];
                    var component = this.components[type];
                    if (!component) {
                        u.warn('`%s` has not been added to the Ioc', type);
                    }
                    else {
                        needModules = parser.getDependentModules(component, needModules, component.argDeps);
                    }
                }
 
                loadComponentModules(this, needModules, u.bind(createInstances, this, ids, cb));
 
                return this;
            };
 
            Context.prototype.getComponentConfig = function (id) {
                return this.components[id];
            };
 
            Context.prototype.loader = function (loader) {
                this.moduleLoader = loader;
            };
 
            /**
             * 销毁容器,会遍历容器中的单例,如果有设置dispose,调用他们的 dispose 方法
             */
            Context.prototype.dispose = function () {
                this.container.dispose();
                this.components = null;
                this.parser = null;
            };
 
            function createComponent(id, config) {
                var component = {
                    id: id,
                    args: config.args || [],
                    properties: config.properties || {},
                    argDeps: null,
                    propDeps: null,
                    setterDeps: null,
                    scope: config.scope || 'transient',
                    creator: config.creator || null,
                    module: config.module || undefined,
                    isFactory: !!config.isFactory,
                    auto: !!config.auto,
                    instance: null
                };
 
                // creator为函数,那么先包装下
                typeof component.creator === 'function' && createCreator(component);
                component.argDeps = this.parser.getDepsFromArgs(component.args);
                component.propDeps = this.parser.getDepsFromProperties(component.properties);
                return component;
            }
 
            function createCreator(component, module) {
                var creator = component.creator = component.creator || module;
 
                if (typeof creator === 'string') {
                    var method = module[creator];
                    var moduleFactory = function () {
                        return method.apply(module, arguments);
                    };
 
                    creator = (!component.isFactory || component.scope === 'static') ? method : moduleFactory;
                    component.creator = creator;
                }
 
                // 给字面量组件和非工厂组件套一层 creator,后面构造实例就可以无需分支判断,直接调用 component.creator
                if (!component.isFactory && component.scope !== 'static') {
                    component.creator = function () {
                        creatorWrapper.prototype = creator.prototype;
                        return new creatorWrapper(creator, arguments);
                    }
                }
            }
 
            function loadComponentModules(context, moduleMaps, cb) {
                var modules = [];
                for (var k in moduleMaps) {
                    modules.push(k);
                }
 
                context.moduleLoader(modules, function () {
                    for (var i = arguments.length - 1; i > -1; --i) {
                        var module = arguments[i];
                        var components = moduleMaps[modules[i]];
                        for (var j = components.length - 1; j > -1; --j) {
                            var component = components[j];
                            typeof component.creator !== 'function' && createCreator(component, module);
                        }
                    }
                    cb();
                });
            }
 
            function createInstances(ids, cb) {
                var instances = Array(ids.length);
                if (ids.length == 0) {
                    return cb.apply(null, instances);
                }
 
                var container = this.container;
                var parser = this.parser;
                var context = this;
                var needSetterModules = {};
                var count = ids.length;
                var done = function () {
                    --count === 0 && cb.apply(null, instances);
                };
 
                for (var i = 0, len = ids.length; i < len; ++i) {
                    var component = this.components[ids[i]];
                    var instance = container.createInstance(component);
                    instances[i] = instance;
 
                    if (component) {
                        needSetterModules = parser.getDependentModules(component, {}, component.propDeps);
 
                        // 获取 setter 依赖
                        if (!component.setterDeps && component.auto) {
                            component.setterDeps = parser.getDepsFromSetters(instance, component.properties);
                            needSetterModules = parser.getDependentModules(component, needSetterModules, component.setterDeps);
                        }
 
                        loadComponentModules(this, needSetterModules, u.bind(injectDeps, context, instance, component, done));
                    } else {
                        done();
                    }
                }
            }
 
            function injectDeps(instance, component, cb) {
                var complete = {
                    prop: false,
                    setter: false
                };
                var injected = function (type) {
                    complete[type] = true;
                    complete.prop && complete.setter && cb();
                };
                injectPropDependencies(this, instance, component, u.bind(injected, null, 'prop'));
                injectSetterDependencies(this, instance, component, u.bind(injected, null, 'setter'));
            }
 
            function injectSetterDependencies(context, instance, component, cb) {
                var deps = component.setterDeps || [];
                context.getComponent(deps, function () {
                    for (var i = deps.length - 1; i > -1; --i) {
                        var dep = deps[i];
                        setProperty(instance, dep, arguments[i]);
                    }
                    cb();
                });
            }
 
            function injectPropDependencies(context, instance, component, cb) {
                var deps = component.propDeps;
                var props = component.properties;
                context.getComponent(deps, function () {
                    for (var k in props) {
                        var value = props[k];
                        if (u.hasReference(value)) {
                            value = arguments[u.indexOf(deps, value.$ref)];
                        }
                        setProperty(instance, k, value);
                    }
                    cb();
                });
            }
 
            function setProperty(instance, key, value) {
                var name = 'set' + key.charAt(0).toUpperCase() + key.slice(1);
                typeof instance[name] === 'function' ? instance[name](value) : (instance[key] = value);
            }
 
            return Context;
        }
    );
 
}(typeof define === 'function' && define.amd ? define : function (factory) { module.exports = factory; }, this);