/*
    * Copyright (c) 2002-2022, City of Paris
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    *  1. Redistributions of source code must retain the above copyright notice
   *     and the following disclaimer.
   *
   *  2. Redistributions in binary form must reproduce the above copyright notice
   *     and the following disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
   *     contributors may be used to endorse or promote products derived from
   *     this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * License 1.0
   */
  package fr.paris.lutece.portal.service.regularexpression;
  
  import fr.paris.lutece.portal.business.regularexpression.RegularExpression;
  import fr.paris.lutece.portal.service.plugin.PluginService;
  import fr.paris.lutece.portal.service.spring.SpringContextService;
  
  import org.springframework.beans.factory.BeanDefinitionStoreException;
  import org.springframework.beans.factory.CannotLoadBeanClassException;
  import org.springframework.beans.factory.NoSuchBeanDefinitionException;
  
  import java.util.List;
  
  /**
   *
   * this class provides services for use regular expression
   */
  public final class RegularExpressionService
  {
      private static final String PLUGIN_REGULAR_EXPRESSION_NAME = "regularexpression";
      private static RegularExpressionService _singleton;
      private boolean _bServiceAvailable = true;
      private IRegularExpressionService _service;
  
      /**
       * Private constructor
       */
      private RegularExpressionService( )
      {
          try
          {
              _service = SpringContextService.getBean( "regularExpressionService" );
              _bServiceAvailable = _service != null;
          }
          catch( CannotLoadBeanClassException | NoSuchBeanDefinitionException | BeanDefinitionStoreException e )
          {
              _bServiceAvailable = false;
          }
      }
  
      /**
       * Returns the unique instance of the service
       * 
       * @return The instance of the service
       */
      public static synchronized RegularExpressionService getInstance( )
      {
          if ( _singleton == null )
          {
              _singleton = new RegularExpressionService( );
          }
          return _singleton;
      }
  
      /**
       *
       * @return true if the regular expression service is available
       */
      public boolean isAvailable( )
      {
          return _bServiceAvailable && PluginService.isPluginEnable( PLUGIN_REGULAR_EXPRESSION_NAME );
      }
  
      /**
       * return false if the pattern is invalid
       * 
       * @param strPattern
      *            the pattern to test
      * @return false if the pattern is invalid
      */
     boolean isPatternValide( String strPattern )
     {
         return isAvailable( ) && _service.isPatternValide( strPattern );
     }
 
     /**
      * return false if the expression's syntax is invalid
      * 
      * @param regularExpression
      *            the regular expression object to test
      * @return false if the expression's syntax is invalid
      */
     boolean isPatternValide( RegularExpression regularExpression )
     {
         return isAvailable( ) && _service.isPatternValide( regularExpression );
     }
 
     /**
      * return true if the value in parameter verify the pattern
      * 
      * @param strValueToTest
      *            the value to test
      * @param strPattern
      *            the regular expression Pattern
      * @return true if the value in parameter verify the pattern
      */
     public boolean isMatches( String strValueToTest, String strPattern )
     {
         return isAvailable( ) && _service.isMatches( strValueToTest, strPattern );
     }
 
     /**
      * return true if the value in parameter verify the regular expression
      * 
      * @param strValueToTest
      *            the value to test
      * @param regularExpression
      *            the regular expression
      * @return true if the value verify the regular expression
      */
     public boolean isMatches( String strValueToTest, RegularExpression regularExpression )
     {
         return isAvailable( ) && _service.isMatches( strValueToTest, regularExpression );
     }
 
     /**
      * return the regular expression object whose identifier is specified in parameter
      * 
      * @param nKey
      *            the regular expression key
      * @return the regular expression object whose identifier is specified in parameter
      */
     public RegularExpression getRegularExpressionByKey( int nKey )
     {
         return isAvailable( ) ? _service.getRegularExpressionByKey( nKey ) : null;
     }
 
     /**
      * return a list of regular expression
      * 
      * @return all regular expression
      */
     public List<RegularExpression> getAllRegularExpression( )
     {
         return isAvailable( ) ? _service.getAllRegularExpression( ) : null;
     }
 }