/**
 * This file is part of the Meeds project (https://meeds.io/).
 *
 * Copyright (C) 2020 - 2025 Meeds Association contact@meeds.io
 *
 * This program 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 3 of the License, or (at your option) any later version.
 * This program 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 program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.exoplatform.social.common.xmlprocessor;

import java.util.Iterator;
import java.util.LinkedList;

/**
 * Implementation of {@link XMLProcessor}.
 *
 */
public class XMLProcessorImpl implements XMLProcessor {
  
  /**
   * The linked list for all filters.
   */
  private LinkedList<Filter> filters;

  /**
   * Constructor
   */
  public XMLProcessorImpl() {
    filters = new LinkedList<>();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void addFilter(Filter filter) {
    filters.add(filter);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void removeFilter(Filter addedFilter) {
    filters.remove(addedFilter);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void addFilterPlugin(BaseXMLFilterPlugin filterComponentPlugin) {
    addFilter(filterComponentPlugin);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void removeFilterPlugin(BaseXMLFilterPlugin filterComponentPlugin) {
    removeFilter(filterComponentPlugin);
  }

  /**
   * {@inheritDoc}
   */
  public Object process(Object input) {
    if (input == null) return input;
    for (Iterator<Filter> filterIterator = filters.iterator();
         filterIterator.hasNext();
         ) {
      Filter filter = filterIterator.next();
      input = filter.doFilter(input);
    }
    return input;
  }
}
