2004-03-31 Rafael Teixeira <rafaelteixeirabr@hotmail.com>

[mono.git] / mcs / class / Microsoft.VisualBasic / Microsoft.VisualBasic / Microsoft.VisualBasic.CompilerServices / BooleanType.cs

diff --git a/mcs/class/Microsoft.VisualBasic/Microsoft.VisualBasic/Microsoft.VisualBasic.CompilerServices/BooleanType.cs b/mcs/class/Microsoft.VisualBasic/Microsoft.VisualBasic/Microsoft.VisualBasic.CompilerServices/BooleanType.cs
index b897cc8772f0a7dcaa22239fa7c826803173b48d..41e28fcaf3e64b8e49e634470383c0ef4bc53e14 100644 (file)
--- a/mcs/class/Microsoft.VisualBasic/Microsoft.VisualBasic/Microsoft.VisualBasic.CompilerServices/BooleanType.cs
+++ b/mcs/class/Microsoft.VisualBasic/Microsoft.VisualBasic/Microsoft.VisualBasic.CompilerServices/BooleanType.cs
@@ -1,54 +1,81 @@
 //
 // BooleanType.cs
 //
-// Author:
-//   Chris J Breisch (cjbreisch@altavista.net) 
-//   Francesco Delfino (pluto@tipic.com)
-//   Joerg Rosenkranz (JoergR@voelcker.com)
+//     Author:
+//     Chris J Breisch (cjbreisch@altavista.net) 
+//     Dennis Hayes    (dennish@raytek.com)
 //
-// (C) 2002 Chris J Breisch
-//     2002 Tipic, Inc (http://www.tipic.com)
-//     2004 Joerg Rosenkranz
+//     (C) 2002 Chris J Breisch
+//     (C) 2004 Novell
 //
-
+ /*
+  * Copyright (c) 2002-2003 Mainsoft Corporation.
+  *
+  * Permission is hereby granted, free of charge, to any person obtaining a
+  * copy of this software and associated documentation files (the "Software"),
+  * to deal in the Software without restriction, including without limitation
+  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+  * and/or sell copies of the Software, and to permit persons to whom the
+  * Software is furnished to do so, subject to the following conditions:
+  * 
+  * The above copyright notice and this permission notice shall be included in
+  * all copies or substantial portions of the Software.
+  * 
+  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+  * DEALINGS IN THE SOFTWARE.
+  */
 using System;
 using System.Globalization;
 
-namespace Microsoft.VisualBasic.CompilerServices 
-{
+namespace Microsoft.VisualBasic.CompilerServices {
        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)] 
        [Microsoft.VisualBasic.CompilerServices.StandardModuleAttribute] 
        sealed public class BooleanType {
-               // Declarations
-               // Constructors
-               // Properties
-               // Methods
-               public static System.Boolean FromString (System.String Value) 
-               {
+               /**
+                * The method converts given object to boolean by the following logic:
+                * 1. If input object is null - return null
+                * 2. If input object is String - run FromString method
+                * 3. Otherwise run .NET default conversion - Convert.ToBoolean
+                * @param value - The object that going to be converted
+                * @return boolean The boolean value that converted from the source object
+                */
+               public static System.Boolean FromObject (System.Object Value) {
+                       if ((object)Value == null) return false;
+                       if (Value is string)return FromString((string)Value);
+                       return System.Convert.ToBoolean(Value);
+               }
+               /**
+                * The method try to convert given string to boolean in a following way:
+                * 1. If input value is True or False string - return corresponding value
+                * 2. If input string represents number: return true if this number is not 
+                *    equals to zero, otherwise return false;
+                * @exception InvalidCastException - in case if number translation failed 
+                *  due to NumberFormatException.
+                * @exception All other thrown exceptions from ClrDobule.Parse 
+                * @param str - The string that converted to boolean
+                * @return boolean The value that extracted from the input string. 
+                */
+               public static System.Boolean FromString (System.String Value) {
                        if (string.Compare(Value, bool.TrueString, true) == 0)
                                return true;
-                       
+                        
                        if (string.Compare(Value, bool.FalseString, true) == 0)
                                return false;
-                       
+                        
                        double conv;
                        if (double.TryParse(Value, NumberStyles.Any, NumberFormatInfo.InvariantInfo, out conv))
                                return (conv != 0);
-                       
+                         
                        throw new InvalidCastException (
                                string.Format (
-                                       "Cast from string \"{0}\" to type 'Boolean' is not valid.",
-                                       Value));
-               }
-               
-               public static System.Boolean FromObject (System.Object Value) 
-               {
-                       if ((object)Value == null) return false;
-                       if (Value is string) 
-                               return FromString((string)Value);
-                       else 
-                               return System.Convert.ToBoolean(Value);
-               }
-               // Events
-       };
+                               "Cast from string \"{0}\" to type 'Boolean' is not valid.",
+                               Value));
+               }       
+       }
 }
+