/*
    *
    * The DbUnit Database Testing Framework
    * Copyright (C)2002-2004, DbUnit.org
    *
    * 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 org.dbunit.dataset.common.handlers;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @author fede
   * @author Last changed by: $Author$
   * @version $Revision$ $Date$
   * @since 2.2 (Sep 12, 2004)
   */
  public class EnforceHandler extends AbstractPipelineComponent {
  
      /**
       * Logger for this class
       */
      private static final Logger logger = LoggerFactory.getLogger(EnforceHandler.class);
  
      private PipelineComponent [] enforcedComponents;
      private PipelineComponent theHandlerComponent;
  
      private EnforceHandler(PipelineComponent [] components) {
          setEnforcedComponents(components);
      }
  
  
      public static final PipelineComponent ENFORCE(PipelineComponent component) {
          logger.debug("ENFORCE(component={}) - start", component);
  
          return EnforceHandler.ENFORCE(new PipelineComponent [] {component});
      }
  
      public static final PipelineComponent ENFORCE(PipelineComponent [] components) {
          logger.debug("ENFORCE(components={}) - start", components);
  
          return createPipelineComponent(new EnforceHandler(components), new ENFORCE());
      }
  
      public boolean canHandle(char c) throws IllegalInputCharacterException {
          if(logger.isDebugEnabled())
              logger.debug("canHandle(c={}) - start", String.valueOf(c));
  
          for (int i = 0; i < getEnforcedComponents().length; i++) {
              if (getEnforcedComponents()[i].canHandle(c)) {
                  setTheHandlerComponent(getEnforcedComponents()[i]);
                  return true;
              }
          }
          throw new IllegalInputCharacterException("(working on piece #" + getPipeline().getProducts().size() + ")"
                  + getPipeline().getCurrentProduct().toString() + ": " + "Character '" + c + "' cannot be handled");
      }
  
      public void setPipeline(Pipeline pipeline) {
          logger.debug("setPipeline(pipeline={}) - start", pipeline);
  
          for (int i = 0; i < getEnforcedComponents().length; i++) {
              getEnforcedComponents()[i].setPipeline(pipeline);
          }
          super.setPipeline(pipeline);
      }
  
      protected PipelineComponent[] getEnforcedComponents() {
          logger.debug("getEnforcedComponents() - start");
  
          return enforcedComponents;
      }
  
      protected void setEnforcedComponents(PipelineComponent[] enforcedComponents) {
          logger.debug("setEnforcedComponents(enforcedComponents={}) - start", enforcedComponents);
  
          this.enforcedComponents = enforcedComponents;
      }
  
      PipelineComponent getTheHandlerComponent() {
          logger.debug("getTheHandlerComponent() - start");
  
          return theHandlerComponent;
      }
 
     void setTheHandlerComponent(PipelineComponent theHandlerComponent) {
         logger.debug("setTheHandlerComponent(theHandlerComponent={}) - start",
                 theHandlerComponent);
 
         this.theHandlerComponent = theHandlerComponent;
     }
 
     static private class ENFORCE extends Helper {
 
         /**
          * Logger for this class
          */
         private static final Logger logger = LoggerFactory.getLogger(ENFORCE.class);
 
         public void helpWith(char c) {
             if(logger.isDebugEnabled())
                 logger.debug("helpWith(c={}) - start", String.valueOf(c));
 
             try {
                 EnforceHandler handler = (EnforceHandler) getHandler();
                 handler.getTheHandlerComponent().handle(c);
                 getHandler().getPipeline().removeFront();
             } catch (PipelineException e) {
                 throw new RuntimeException(e.getMessage());
             } catch (IllegalInputCharacterException e) {
                 throw new RuntimeException(e.getMessage());
             }
             // ignore the char
         }
     }
 }