Strings.java

/**
 * This file is part of OCPsoft SocialPM: Agile Project Management Tools (SocialPM) 
 *
 * Copyright (c)2011 Lincoln Baxter, III <lincoln@ocpsoft.com> (OCPsoft)
 * Copyright (c)2011 OCPsoft.com (http://ocpsoft.com)
 * 
 * If you are developing and distributing open source applications under 
 * the GNU General Public License (GPL), then you are free to re-distribute SocialPM 
 * under the terms of the GPL, as follows:
 *
 * SocialPM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * SocialPM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with SocialPM.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * For individuals or entities who wish to use SocialPM privately, or
 * internally, the following terms do not apply:
 *  
 * For OEMs, ISVs, and VARs who wish to distribute SocialPM with their 
 * products, or host their product online, OCPsoft provides flexible 
 * OEM commercial licenses.
 * 
 * Optionally, Customers may choose a Commercial License. For additional 
 * details, contact an OCPsoft representative (sales@ocpsoft.com)
 */
package com.ocpsoft.socialpm.util;

public class Strings
{
   /**
    * Replace all instances of camel case naming standard with the underscore equivalent. E.g. "someString" becomes
    * "some_string". This method does not perform any validation and will not throw any exceptions.
    * 
    * @param input unformatted string
    * @return modified result
    */
   public static String camelToUnderscore(final String input)
   {
      String result = input;
      if (input instanceof String)
      {
         result = input.replaceAll("([a-z])([A-Z])", "$1_$2").toLowerCase();
      }
      return result;
   }

   /**
    * Join all strings, using the delim character as the delimeter. E.g.: a delim of "-", and strings of "foo", "bar"
    * would produce "foo-bar"
    * 
    * @param buf
    * @param strings
    * @return
    */
   public static String join(final String delim, final String... strings)
   {
      String result = "";
      for (String string : strings)
      {
         result += delim + string;
      }

      if (delim != null)
      {
         result = result.substring(delim.length());
      }
      return result;
   }

   public static String canonicalize(final String name)
   {
      String result = null;
      if (name != null)
      {
         result = name.toLowerCase().replace(' ', '-').replaceAll("[^a-z0-9-]*", "").replaceAll("-+", "-");
      }
      return result;
   }
}