//
// Jala Project [http://opensvn.csie.org/traccgi/jala]
//
// Copyright 2004 ORF Online und Teletext GmbH
//
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an ``AS IS'' BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// $Revision: 78 $
// $LastChangedBy: robert $
// $LastChangedDate: 2007-02-13 15:22:21 +0100 (Di, 13 Feb 2007) $
// $HeadURL: https://robert@opensvn.csie.org/jala/trunk/code/RemoteContent.js $
//


/**
 * @fileoverview Fields and methods of the Global prototype.
 */


/**
 * Returns true if the value passed as argument is either a string literal,
 * an instance of String or of java.lang.String.
 * @param {Object} val The value to test
 * @returns True if the value is a string, false otherwise
 * @type Boolean
 */
var isString = function(val) {
   return typeof(val) == "string" ||
             val instanceof java.lang.String ||
             val instanceof String;
};

/**
 * Returns true if the value passed as argument is either a boolean
 * literal or an instance of Boolean.
 * @param {Object} val The value to test
 * @returns True if the value is a boolean, false otherwise
 * @type Boolean
 */
var isBoolean = function(val) {
   return typeof(val) == "boolean" ||
             val instanceof Boolean;
};

/**
 * Returns true if the value passed as argument is either a number,
 * an instance of Number or of java.lang.Number.
 * @param {Object} val The value to test
 * @returns True if the value is a number, false otherwise
 * @type Boolean
 */
var isNumber = function(val) {
   return typeof(val) == "number" ||
             val instanceof java.lang.Number ||
             val instanceof Number;
};

/**
 * Returns true if the value passed as argument is null.
 * @param {Object} val The value to test
 * @returns True if the value is null, false otherwise
 * @type Boolean
 */
var isNull = function(val) {
   return val === null;
};

/**
 * Returns true if the value passed as argument is undefined.
 * @param {Object} val The value to test
 * @returns True if the value is undefined, false otherwise
 * @type Boolean
 */
var isUndefined = function(val) {
   return val === undefined;
};

/**
 * Returns true if the value passed as argument is an array.
 * @param {Object} val The value to test
 * @returns True if the value is an array, false otherwise
 * @type Boolean
 */
var isArray = function(val) {
   return val instanceof Array;
};

/**
 * Returns true if the value passed as argument is either a Javascript date
 * or an instance of java.util.Date.
 * @param {Object} val The value to test
 * @returns True if the value is a date, false otherwise
 * @type Boolean
 */
var isDate = function(val) {
   return val instanceof Date ||
             val instanceof java.util.Date;
};

/**
 * Returns true if the value passed as argument is either a Javascript
 * object or an instance of java.lang.Object.
 * @param {Object} val The value to test
 * @returns True if the value is an object, false otherwise
 * @type Boolean
 */
var isObject = function(val) {
   return val instanceof Object ||
             val instanceof java.lang.Object;
};

/**
 * Returns true if the value passed as argument is a function.
 * @param {Object} val The value to test
 * @returns True if the argument is a function, false otherwise
 * @type Boolean
 */
var isFunction = function(val) {
   return val instanceof Function;
};