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import java.util.Collection;
import java.util.Iterator;
/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/util/branches/sakai_2-5-4/util-util/util/src/java/org/sakaiproject/util/StringUtil.java $
* $Id: StringUtil.java 34934 2007-09-10 22:52:23Z lance@indiana.edu $
***********************************************************************************
*
* Copyright (c) 2003, 2004, 2005, 2006 The Sakai Foundation.
*
* Licensed under the Educational Community License, Version 1.0 (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.opensource.org/licenses/ecl1.php
*
* 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.
*
**********************************************************************************/
/**
* <p>
* StringUtil collects together some string utility classes.
* </p>
*/
public class StringUtil
{
/**
* Reverse the split operation.
*
* @param parts
* The parts to combine
* @param index
* the index to the fist part to use
* @param length
* the number of parts to use
* @param splitter
* The between-parts text
*/
public static String unsplit(String[] parts, int index, int length, String splitter)
{
if (parts == null) return null;
if ((index < 0) || (index >= parts.length)) return null;
if (index+length > parts.length) return null;
StringBuilder buf = new StringBuilder();
for (int i = index; i < index+length; i++)
{
if (parts[i] != null) buf.append(parts[i]);
buf.append(splitter);
}
// remove the trailing splitter
buf.setLength(buf.length()-splitter.length());
return buf.toString();
}
}
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