kopia lustrzana https://github.com/c9/core
38 wiersze
1.3 KiB
JavaScript
38 wiersze
1.3 KiB
JavaScript
define(function(require, exports, module) {
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/**
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* Attempts to create a proxy object that will only allow you to access
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* known properties of an object.
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*
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* @param name The "name" of this object to use in error messages.
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* @param knownProperties Optional: a list of known properties of the object.
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*/
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exports.createKnownPropertyProxy = function(object, name, knownProperties) {
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/*global Proxy*/
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if (typeof Proxy === "undefined")
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return object;
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if (!knownProperties)
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knownProperties = Object.keys(object);
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return Proxy.create({
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get: function(proxy, property) {
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if (property === "inspect")
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return object.inspect;
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if (!(property in object) && knownProperties.indexOf(property) === -1)
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throw Error("Invalid property accessed: " + name + "." + property);
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if (property === "innerObject")
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return object;
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return object[property];
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},
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set: function(proxy, property, value) {
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object[property] = value;
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return true;
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},
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getPropertyNames: function() {
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return Object.keys(object);
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}
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});
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};
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}); |