/*\
* Copyright 2006 Klaus Rogall, Hamburg, Germany (klaus.rogall@web.de). All rights reserved.
* _____________________________________________________________________________________________________________________
*
* This class is "Open Source" as defined by the Open Source Initiative (OSI). You can redistribute it and/or modify it
* under the terms of the BSD License. The license text is appended to the end of this file.
\*/
package de.klaro.base.util;
/**
* Methoden zur Boolean-Manipulation und Boolean-Verarbeitung.
*/
public class Booleans extends Object
{
/* ______________________________________________________________________________________________________________ *\
\* Konstanten */
/* ______________________________________________________________________________________________________________ *\
\* Klassenvariablen */
/* ______________________________________________________________________________________________________________ *\
\* Instanzvariablen */
/* ______________________________________________________________________________________________________________ *\
\* Konstruktoren */
/**
* Erzeugt eine Instanz dieser Klasse.
*
* Da verhindert werden soll, dass Instanzen dieser Klasse ausserhalb dieser Klasse erzeugt werdem, ist dieser
* Konstruktor 'private' deklariert.
*/
private Booleans()
{
super();
}
/* ______________________________________________________________________________________________________________ *\
\* Instanzmethoden */
/* ______________________________________________________________________________________________________________ *\
\* Klassenmethoden */
/**
* Wandelt einen String in einen booleschen Wert um.
*
* Neben den blichen Strings "true" und "false" werden auch "yes" und "no" sowie "on" und "off" erkannt und
* entsprechend umgewandelt. Gro-/Kleinschreibung wird nicht beachtet.
*
* @param string Der String
* @return Der String als boolescher Wert, oder 'null' wenn der String kein bekanntes Format hat
*/
public static Boolean parseBoolean(String string)
{
if (string == null)
return null;
if (string.equalsIgnoreCase("true"))
return true;
if (string.equalsIgnoreCase("false"))
return false;
if (string.equalsIgnoreCase("yes"))
return true;
if (string.equalsIgnoreCase("no"))
return false;
if (string.equalsIgnoreCase("on"))
return true;
if (string.equalsIgnoreCase("off"))
return false;
return null;
}
/**
* Wandelt einen String in einen booleschen Wert um.
*
* Neben den blichen Strings "true" und "false" werden auch "yes" und "no" sowie "on" und "off" erkannt und
* entsprechend umgewandelt. Gro-/Kleinschreibung wird nicht beachtet.
*
* @param string Der String
* @param defaultValue Der Default-Wert, der geliefert wird, wenn die Umwandlung fehlschlgt
* @return Der String als boolescher Wert
*/
public static boolean parse(CharSequence string, boolean defaultValue)
{
if (string == null)
{
return defaultValue;
}
Boolean result = parseBoolean(string.toString());
return (result == null)? defaultValue: result;
}
/* ______________________________________________________________________________________________________________ *\
\* Klassen */
}
/*\
* _____________________________________________________________________________________________________________________
*
* This software is distributed under the terms of the BSD License:
*
* Copyright 2006 Klaus Rogall, Hamburg, Germany (klaus.rogall@web.de). All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the distribution.
* - Neither the name of the Klaus Rogall nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* _____________________________________________________________________________________________________________________
\*/
