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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Jetpack.
*
* The Initial Developer of the Original Code is Mozilla.
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Atul Varma <atul@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
"use strict";
function logToConsole(e) {
console.exception(e);
}
var catchAndLog = exports.catchAndLog = function(callback,
defaultResponse,
logException) {
if (!logException)
logException = logToConsole;
return function() {
try {
return callback.apply(this, arguments);
} catch (e) {
logException(e);
return defaultResponse;
}
};
};
exports.catchAndLogProps = function catchAndLogProps(object,
props,
defaultResponse,
logException) {
if (typeof(props) == "string")
props = [props];
props.forEach(
function(property) {
object[property] = catchAndLog(object[property],
defaultResponse,
logException);
});
};
/**
* Catch and return an exception while calling the callback. If the callback
* doesn't throw, return the return value of the callback in a way that makes it
* possible to distinguish between a return value and an exception.
*
* This function is useful when you need to pass the result of a call across
* a process boundary (across which exceptions don't propagate). It probably
* doesn't need to be factored out into this module, since it is only used by
* a single caller, but putting it here works around bug 625560.
*/
exports.catchAndReturn = function(callback) {
return function() {
try {
return { returnValue: callback.apply(this, arguments) };
}
catch (exception) {
return { exception: exception };
}
};
};
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