AbstractConfigurationSource.java

/*
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package com.celements.xwikiPatches;

import java.util.Collections;
import java.util.List;
import java.util.Properties;

import org.xwiki.configuration.ConfigurationSource;

/**
 * Base class to use to implement {@link ConfigurationSource}.
 *
 * @version $Id$
 * @since 3.5M1
 */
public abstract class AbstractConfigurationSource implements ConfigurationSource {

  /**
   * @param valueClass
   *          the class of the property
   * @param <T>
   *          the type of the property
   * @return the default value of a property for the provided class
   */
  protected <T> T getDefault(Class<T> valueClass) {
    T result = null;

    if (valueClass != null) {
      if (List.class.getName().equals(valueClass.getName())) {
        result = valueClass.cast(Collections.emptyList());
      } else if (Properties.class.getName().equals(valueClass.getName())) {
        result = valueClass.cast(new Properties());
      }
    }

    return result;
  }
}