/*
    * This file is part of ***  M y C o R e  ***
    * See http://www.mycore.de/ for details.
    *
    * MyCoRe is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    *
   * MyCoRe 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with MyCoRe.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  package org.mycore.wfc.actionmapping;
  
  import org.apache.logging.log4j.LogManager;
  import org.jdom2.Element;
  import org.mycore.datamodel.classifications2.MCRCategLinkReference;
  import org.mycore.datamodel.classifications2.MCRCategLinkService;
  import org.mycore.datamodel.classifications2.MCRCategLinkServiceFactory;
  import org.mycore.datamodel.classifications2.MCRCategoryID;
  import org.mycore.parsers.bool.MCRCondition;
  
  /**
   * @author Thomas Scheffler (yagee)
   *
   */
  public class MCRCategoryCondition implements MCRCondition<MCRWorkflowData> {
  
      private MCRCategoryID mcrCategoryID;
  
      private boolean not;
  
      private String fieldName;
  
      private static MCRCategLinkService LINK_SERVICE = MCRCategLinkServiceFactory.getInstance();
  
      public MCRCategoryCondition(String fieldName, MCRCategoryID mcrCategoryID, boolean not) {
          this.fieldName = fieldName;
          this.mcrCategoryID = mcrCategoryID;
          this.not = not;
  
      }
  
      /* (non-Javadoc)
       * @see org.mycore.parsers.bool.MCRCondition#evaluate(java.lang.Object)
       */
      @Override
      public boolean evaluate(MCRWorkflowData workflowData) {
          MCRCategLinkReference reference = workflowData.getCategoryReference();
          if (reference == null) {
              LogManager.getLogger(getClass())
                  .error("Cannot evaluate '{}', if MCRWorkflowData does not contain an object reference",
                      toString());
              return false;
          }
          return LINK_SERVICE.isInCategory(reference, mcrCategoryID) ^ not;
      }
  
      @Override
      public String toString() {
          return fieldName + (not ? " != " : " = ") + mcrCategoryID.getID() + " ";
      }
  
      /* (non-Javadoc)
       * @see org.mycore.parsers.bool.MCRCondition#toXML()
       */
      @Override
      public Element toXML() {
          Element cond = new Element("condition");
          cond.setAttribute("field", fieldName);
          cond.setAttribute("operator", (not ? "!=" : "="));
          cond.setAttribute("value", mcrCategoryID.getID());
          return cond;
      }
  
  }