/*
 * Copyright 2017 Graz University of Technology EAAF-Core Components has been developed in a
 * cooperation between EGIZ, A-SIT Plus, A-SIT, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by the European
 * Commission - subsequent versions of the EUPL (the "Licence"); You may not use this work except in
 * compliance with the Licence. You may obtain a copy of the Licence at:
 * https://joinup.ec.europa.eu/news/understanding-eupl-v12
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the Licence
 * is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the Licence for the specific language governing permissions and limitations under
 * the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text file for details on the
 * various modules and licenses. The "NOTICE" text file is part of the distribution. Any derivative
 * works that you distribute must include a readable copy of the "NOTICE" text file.
*/

package at.gv.egiz.eaaf.modules.pvp2.impl.metadata;

import java.util.ArrayList;
import java.util.List;

import org.opensaml.saml2.metadata.provider.FilterException;
import org.opensaml.saml2.metadata.provider.MetadataFilter;
import org.opensaml.xml.XMLObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Metadata filter-chain implementation.
 *
 * @author tlenz
 *
 */
public class MetadataFilterChain implements MetadataFilter {
  private static final Logger log = LoggerFactory.getLogger(MetadataFilterChain.class);

  private final List<MetadataFilter> filters = new ArrayList<>();

  /**
   * Return all actually used Metadata filters.
   *
   * @return List of Metadata filters
   */
  public List<MetadataFilter> getFilters() {
    return filters;
  }

  /**
   * Add a new Metadata filter to filterchain.
   *
   * @param filter add a metadata filter
   */
  public void addFilter(final MetadataFilter filter) {
    filters.add(filter);
  }

  /*
   * (non-Javadoc)
   *
   * @see
   * org.opensaml.saml2.metadata.provider.MetadataFilter#doFilter(org.opensaml.xml
   * .XMLObject)
   */
  @Override
  public void doFilter(final XMLObject arg0) throws FilterException {
    for (final MetadataFilter filter : filters) {
      log.trace("Use EAAFMetadataFilter " + filter.getClass().getName());
      filter.doFilter(arg0);
    }

  }

}