112 lines
2.7 KiB
JavaScript
112 lines
2.7 KiB
JavaScript
/**
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* ease.js warning system
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*
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* Copyright (C) 2010 Mike Gerwitz
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*
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* This file is part of ease.js.
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*
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* ease.js is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @author Mike Gerwitz
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* @package core
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*/
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/**
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* Permits wrapping an exception as a warning
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*
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* Warnings are handled differently by the system, depending on the warning
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* level that has been set.
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*
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* @param {Error} e exception (error) to wrap
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*
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* @return {Warning} new warning instance
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*/
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var Warning = exports.Warning = function( e )
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{
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// allow instantiation without use of 'new' keyword
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if ( !( this instanceof Warning ) )
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{
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return new Warning( e );
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}
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// ensure we're wrapping an exception
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if ( !( e instanceof Error ) )
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{
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throw TypeError( "Must provide exception to wrap" );
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}
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// copy over the message for convenience
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this.message = e.message;
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this._error = e;
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};
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Warning.prototype = Error();
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/**
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* Return the error wrapped by the warning
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*
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* @return {Error} wrapped error
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*/
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Warning.prototype.getError = function()
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{
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return this._error;
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};
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/**
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* Core warning handlers
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* @type {Object}
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*/
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exports.handlers = {
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/**
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* Logs message to console
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*
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* Will attempt to log using console.warn(), falling back to console.log()
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* if necessary and aborting entirely if neither is available.
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*
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* This is useful as a default option to bring problems to the developer's
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* attention without affecting the control flow of the software.
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*
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* @param {Warning} warning to log
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*
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* @return {undefined}
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*/
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log: function( warning )
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{
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var dest;
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console && ( dest = console.warn || console.log ) &&
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dest( warning.message );
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},
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/**
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* Throws the error associated with the warning
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*
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* This handler is useful for development and will ensure that problems are
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* brought to the attention of the developer.
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*
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* @param {Warning} warning to log
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*
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* @return {undefined}
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*/
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throwError: function( warning )
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{
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throw warning.getError();
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},
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};
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