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+/* <copyright>
+ This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
+ No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
+ (c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
+ </copyright> */
+/**
+ Provides common conversion, validation, and formatting functions for different types of values.
+ @module montage/core/converter/converter
+ @requires montage/core/core
+ */
+var Montage = require("montage").Montage;
+
+
+var FUNCTION_CLASS = '[object Function]',
+    BOOLEAN_CLASS = '[object Boolean]',
+    NUMBER_CLASS = '[object Number]',
+    STRING_CLASS = '[object String]',
+    ARRAY_CLASS = '[object Array]',
+    DATE_CLASS = '[object Date]';
+
+var _toString = Object.prototype.toString;
+
+// TODO should maybe move these into String.isString and Number.isNumber to parallel Array.isArray
+
+/**
+    @exports module:montage/core/converter#isString
+    @function
+*/
+var isString = function(object) {
+    return _toString.call(object) === STRING_CLASS;
+};
+exports.isString = isString;
+
+/**
+    @exports module:montage/core/converter#isNumber
+    @function
+*/
+var isNumber = function(object) {
+    return _toString.call(object) === NUMBER_CLASS;
+};
+exports.isNumber = isNumber;
+
+
+/**
+    @exports module:montage/core/converter#isDef
+    @function
+*/
+var isDef = function(obj) {
+    return (obj && typeof obj !== 'undefined');
+};
+exports.isDef = isDef;
+
+
+var startsWith = exports.startsWith = function(str) {
+    return str.lastIndexOf(prefix, 0) === 0;
+};
+var endsWith = exports.endsWith = function(str) {
+    var l = str.length - suffix.length;
+    return l >= 0 && str.indexOf(suffix, l) == l;
+};
+
+/**
+ Truncates a string to a certain length and adds '...' if necessary.<br>
+ The length also accounts for the ellipsis, so a maximum length of 10 and a string<br>
+ 'Hello World!' produces 'Hello W...'.
+ @function
+ @param {String} str The string to truncate.
+ @param {Number} chars Max number of characters.
+ @param {Boolean} opt_protectEscapedCharacters Whether to protect escaped characters from being cut off in the middle.
+ @return {String} The truncated {@code str} string.
+ */
+var truncate = exports.truncate = function(str, chars, opt_protectEscapedCharacters) {
+    if (opt_protectEscapedCharacters) {
+        goog.string.unescapeEntities(this);
+    }
+
+    if (str.length > chars) {
+        return str.substring(0, chars - 3) + '…';
+    }
+
+    if (opt_protectEscapedCharacters) {
+        str.htmlEscape(this);
+    }
+
+    return this;
+};
+
+
+// Validators
+/**
+ Base validator object.
+ @class module:montage/core/converter.Validator
+ @extends module:montage/core/core.Montage
+ */
+var Validator = exports.Validator = Montage.create(Montage, /** @lends module:montage/core/converter.Validator# */{
+/**
+        @type {Object}
+        @default null
+    */
+    validate: {
+        value: null
+    }
+});
+
+
+// Converters
+
+/**
+ @class module:montage/core/converter.Converter
+ @classdesc The base Converter class that is extended by specific converter classes. A Converter has two primary methods:
+ <ul>
+ <li><code>convert(<i>value</i>)</code> : Convert value to a String.
+ <li><code>revert(<i>value</i>)</code>: Do the reverse. Depending on the specific converter being used, the reverse operation may be "lossy".
+ </ul>
+ */
+var Converter = exports.Converter = Montage.create(Montage, /** @lends module:montage/core/converter.Converter# */ {
+
+    /**
+     Specifies whether the converter allows partial conversion.
+     @type {Property}
+     @default {Boolean} true
+     */
+    allowPartialConversion: {
+        value: true
+    },
+
+    /**
+        @type {Property}
+        @default null
+    */
+    convert: {
+        enumerable: false,
+        value: null
+    },
+/**
+        @type {Property}
+        @default null
+    */
+    revert: {
+        enumerable: false,
+        value: null
+    }
+});
+