it.tidalwave.swing.beansbinding.converter.CommaSeparatedListConverter Maven / Gradle / Ivy

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/*
 * #%L
 * *********************************************************************************************************************
 * 
 * These Foolish Things - Miscellaneous utilities
 * http://thesefoolishthings.tidalwave.it - git clone [email protected]:tidalwave/thesefoolishthings-src.git
 * %%
 * Copyright (C) 2009 - 2015 Tidalwave s.a.s. (http://tidalwave.it)
 * %%
 * *********************************************************************************************************************
 * 
 * Licensed under the Apache 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.apache.org/licenses/LICENSE-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.
 * 
 * *********************************************************************************************************************
 * 
 * $Id$
 * 
 * *********************************************************************************************************************
 * #L%
 */
package it.tidalwave.swing.beansbinding.converter;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.jdesktop.beansbinding.Converter;

/*******************************************************************************
 *
 * @author  Fabrizio Giudici
 * @version $Id$
 *
 ******************************************************************************/
public class CommaSeparatedListConverter extends Converter, String>
  {
    @Override
    public String convertForward (final Collection collection)
      {
        if (collection == null)
          {
            return null;
          }

        final StringBuilder builder = new StringBuilder();

        for (final String s : collection)
          {
            if (builder.length() > 0)
              {
                builder.append(", ");
              }

            builder.append(s);
          }

        return builder.toString();
      }

    @Override
    public Collection convertReverse (final String string)
      {
        if (string == null)
          {
            return null;
          }

        if (string.trim().equals(""))
          {
            return Collections.emptyList();
          }

        final List result = new ArrayList();
        final String[] split = string.split(",");

        for (final String s : split)
          {
            result.add(s.trim());
          }

        return result;
      }
  }