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Wrap NodeScript binding class in JavaScript layer

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This makes it easy to prevent errors where Script methods
are called on non-script objects, resulting in Assertion failures.
This commit is contained in:
isaacs 2012-02-27 17:19:12 -08:00
parent 29463cb60c
commit 44daa9836b
1 changed files with 29 additions and 7 deletions
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36
lib/vm.js
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@ -21,12 +21,34 @@
var binding = process.binding('evals'); var binding = process.binding('evals');
exports.Script = binding.NodeScript; module.exports = Script;
exports.createScript = function(code, ctx, name) { Script.Script = Script;
return new exports.Script(code, ctx, name);
function Script(code, ctx, filename) {
if (!(this instanceof Script)) {
return new Script(code, ctx, filename);
}
var ns = new binding.NodeScript(code, ctx, filename);
// bind all methods to this Script object
Object.keys(binding.NodeScript.prototype).forEach(function(f) {
if (typeof binding.NodeScript.prototype[f] === 'function') {
this[f] = function() {
if (!(this instanceof Script)) {
throw new TypeError('invalid call to '+f);
}
return ns[f].apply(ns, arguments);
};
}
}, this);
}; };
exports.createContext = binding.NodeScript.createContext; Script.createScript = function(code, ctx, name) {
exports.runInContext = binding.NodeScript.runInContext; return new Script(code, ctx, name);
exports.runInThisContext = binding.NodeScript.runInThisContext; };
exports.runInNewContext = binding.NodeScript.runInNewContext;
Script.createContext = binding.NodeScript.createContext;
Script.runInContext = binding.NodeScript.runInContext;
Script.runInThisContext = binding.NodeScript.runInThisContext;
Script.runInNewContext = binding.NodeScript.runInNewContext;