/*

  * Copyright 2009 The Kuali Foundation

  *

  * Licensed under the Educational Community 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.osedu.org/licenses/ECL-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.

  */

 package org.kuali.student.contract.writer;

 /**

  *

  * @author nwright

  */

 public class StringQuoter

 {

  public static String quote (String value)

  {

   if (value == null)

   {

    return null;

   }

   StringBuffer buf = new StringBuffer (value.length () + 3);

   buf.append ('"');

   boolean lastCharWasEscape = false;

   for (int i = 0; i < value.length (); i ++)

   {

    char c = value.charAt (i);

    switch (c)

    {

     case '"':

      if ( ! lastCharWasEscape)

      {

       buf.append ('\\');

      }

      lastCharWasEscape = false;

      break;

     case '\\':

      if ( ! lastCharWasEscape)

      {

       buf.append ('\\');

      }

      lastCharWasEscape = true;

      break;

     case '\n':

     case '\r':

      buf.append ('"');

      buf.append ("\n");

      buf.append ("\t + ");

      buf.append ('"');

      lastCharWasEscape = false;

      continue;

     default:

      lastCharWasEscape = false;

    }

    buf.append (c);

   }

   buf.append ('"');

   return buf.toString ();

  }

 }