gr_module_adapter/index.js

gr平台模块适配类库

/**
 * 创建一个模块的基本接口协议
 */
'use strict';


// Constructor.
var Interface = function (name, methods) {
    if (arguments.length != 2) {
        throw new Error("Interface constructor called with " + arguments.length + "arguments, but expected exactly 2.");
    }
    this.name = name;
    this.methods = [];
    for (var i = 0, len = methods.length; i < len; i++) {
        if (typeof methods[i] !== 'string') {
            throw new Error("Interface constructor expects method names to be " + "passed in as a string.");
        }
        this.methods.push(methods[i]);
    }
};


// Static class method.
Interface.ensureImplements = function (object) {
    if (arguments.length < 2) {
        throw new Error("Function Interface.ensureImplements called with " + arguments.length + "arguments, but expected at least 2.");
    }
    for (var i = 1, len = arguments.length; i < len; i++) {
        var instance = arguments[i];
        if (instance.constructor !== Interface) {
            throw new Error("Function Interface.ensureImplements expects arguments" + "two and above to be instances of Interface.");
        }
        for (var j = 0, methodsLen = instance.methods.length; j < methodsLen; j++) {
            var method = instance.methods[j];
            if (!object[method] || typeof object[method] !== 'function') {
                throw new Error("Function Interface.ensureImplements: object " + "does not implement the " + instance.name + " instance. Method " + method + " was not found.");
            }
        }
    }
};

var ModuleAdapter = new Interface('ModuleAdapter',['getMenus','getAcl']);

function ModuleManager(){
    this.modules = [];
}


ModuleManager.prototype.plus = function (m) {
    Interface.ensureImplements(m, ModuleAdapter);

    this.modules.push(m);
};


exports.ModuleAdapter = ModuleAdapter;
exports.ModuleManager = ModuleManager;