/*
    * Copyright 2003 - 2014 The eFaps Team
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   * Revision:        $Rev$
   * Last Changed:    $Date$
   * Last Changed By: $Author$
   */
  
  package org.efaps.db.print.value;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.efaps.admin.program.esjp.EFapsClassLoader;
  import org.efaps.db.Instance;
  import org.efaps.db.print.OneSelect;
  import org.efaps.eql.IEsjpSelect;
  import org.efaps.util.EFapsException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * TODO comment!
   *
   * @author The eFaps Team
   * @version $Id$
   */
  public class EsjpValueSelect
      extends InstanceValueSelect
  {
      /**
       * Logging instance used in this class.
       */
      private static final Logger LOG = LoggerFactory.getLogger(EsjpValueSelect.class);
  
      /**
       * Name of the esjp class.
       */
      private String className;
  
      /**
       * Esjp to be invoked.
       */
      private IEsjpSelect esjp;
  
      /**
       * List of parameters.
       */
      private final List<String> parameters = new ArrayList<>();
  
      /**
       * @param _oneSelect
       */
      public EsjpValueSelect(final OneSelect _oneSelect,
                             final String _esjp)
      {
          super(_oneSelect);
          LOG.debug("instanciated EsjpValueSelect with: '{}'", _esjp);
          final String[] paraAr = _esjp.split("(?<!\\\\),");
          if (paraAr == null || paraAr.length == 0) {
              LOG.error("Invalid esjp Value select: '{]'", _esjp);
          } else {
              this.className = paraAr[0];
              for (int i = 1; i < paraAr.length; i++) {
                  final String string = paraAr[i];
                  if (string.startsWith("\"")) {
                      this.parameters.add(string.substring(1, string.length() - 2));
                  } else {
                      this.parameters.add(string);
                  }
              };
          }
      }
  
      /**
       * Method to get the value for the current object.
       *
       * @param _object current object
       * @throws EFapsException on error
       * @return object
       */
      @Override
      public Object getValue(final Object _object)
          throws EFapsException
      {
          final Instance inst = (Instance) super.getValue(_object);
         if (this.esjp == null) {
             try {
                 final Class<?> clazz = Class.forName(this.className, false, EFapsClassLoader.getInstance());
                 this.esjp = (IEsjpSelect) clazz.newInstance();
                 final List<Instance> instances = new ArrayList<>();
                 for (final Object obj : getOneSelect().getObjectList()) {
                     instances.add((Instance) super.getValue(obj));
                 }
                 if (this.parameters.isEmpty()) {
                     this.esjp.initialize(instances);
                 } else {
                     this.esjp.initialize(instances, this.parameters.toArray(new String[this.parameters.size()]));
                 }
             } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         return this.esjp.getValue(inst);
     }
 
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String getValueType()
     {
         return "esjp";
     }
 
 }