code: ///////////////////////////////////////////////////////////////////////////////////////////////
  // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
  // Copyright (C) 2001-2023 the original author or authors.
  //
  // This library 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 library 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 library; if not, write to the Free Software
  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  ///////////////////////////////////////////////////////////////////////////////////////////////
  
  package com.puppycrawl.tools.checkstyle.api;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  /**
   * A before execution file filter set applies filters to events.
   * If a before execution file filter in the set rejects an event, then the
   * event is rejected. Otherwise, the event is accepted.
   */
  public final class BeforeExecutionFileFilterSet
      implements BeforeExecutionFileFilter {
  
      /** Filter set. */
      private final Set<BeforeExecutionFileFilter> beforeExecutionFileFilters = new HashSet<>();
  
      /**
       * Adds a Filter to the set.
       *
       * @param filter the Filter to add.
       */
      public void addBeforeExecutionFileFilter(BeforeExecutionFileFilter filter) {
          beforeExecutionFileFilters.add(filter);
      }
  
      /**
       * Removes filter.
       *
       * @param filter filter to remove.
       */
      public void removeBeforeExecutionFileFilter(BeforeExecutionFileFilter filter) {
          beforeExecutionFileFilters.remove(filter);
      }
  
      /**
       * Returns the Filters of the filter set.
       *
       * @return the Filters of the filter set.
       */
      public Set<BeforeExecutionFileFilter> getBeforeExecutionFileFilters() {
          return Collections.unmodifiableSet(beforeExecutionFileFilters);
      }
  
      @Override
      public String toString() {
          return beforeExecutionFileFilters.toString();
      }
  
      @Override
      public boolean accept(String uri) {
          boolean result = true;
          for (BeforeExecutionFileFilter filter : beforeExecutionFileFilters) {
              if (!filter.accept(uri)) {
                  result = false;
                  break;
              }
          }
          return result;
      }
  
      /** Clears the BeforeExecutionFileFilterSet. */
      public void clear() {
          beforeExecutionFileFilters.clear();
      }
  
  }
  