/*
    * Copyright 2003 - 2013 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;
  
  import org.apache.commons.lang3.builder.ToStringBuilder;
  import org.efaps.admin.datamodel.Attribute;
  import org.efaps.admin.datamodel.Classification;
  import org.efaps.admin.datamodel.Type;
  import org.efaps.db.wrapper.SQLPart;
  import org.efaps.db.wrapper.SQLSelect;
  import org.efaps.util.EFapsException;
  import org.efaps.util.cache.CacheReloadException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Select Part for <code>class[CLASSIFICATIONNAME]</code>.
   *
   * @author The eFaps Team
   * @version $Id$
   */
  public class ClassSelectPart
      extends AbstractSelectPart
  {
      /**
       * Logging instance used in this class.
       */
      private static final Logger LOG = LoggerFactory.getLogger(OneSelect.class);
  
      /**
       * Classification this select part belongs to.
       */
      private final Classification classification;
  
      /**
       * index of the table.
       */
      private int tableIdx;
  
      /**
       * @param _classification   classification
       * @throws CacheReloadException on error
       */
      public ClassSelectPart(final String _classification)
          throws CacheReloadException
      {
          this.classification = (Classification) Type.get(_classification);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public int join(final OneSelect _oneSelect,
                      final SQLSelect _select,
                      final int _relIndex)
          throws EFapsException
      {
          Integer ret;
          final String tableName = this.classification.getMainTable().getSqlTable();
          final Attribute attr = this.classification.getAttribute(this.classification.getLinkAttributeName());
          if (attr == null) {
              ClassSelectPart.LOG.error("Could not find attribute: '{}'", this.classification.getLinkAttributeName());
              throw new EFapsException(ClassSelectPart.class, "joinNoAttribute");
          }
          final String column = attr.getSqlColNames().get(0);
          ret = _oneSelect.getTableIndex(tableName, column, _relIndex, this.classification.getId());
          if (ret == null) {
              ret = _oneSelect.getNewTableIndex(tableName, column, _relIndex, this.classification.getId());
              _select.leftJoin(tableName, ret, column, _relIndex, "ID");
          }
          this.tableIdx = ret;
          return ret;
      }
  
      @Override
      public void add2Where(final OneSelect _oneselect,
                            final SQLSelect _select)
      {
          if (this.classification.getMainTable().getSqlColType() != null) {
              _select.addPart(SQLPart.AND)
                     .addColumnPart(this.tableIdx, this.classification.getMainTable().getSqlColType())
                     .addPart(SQLPart.EQUAL)
                     .addValuePart(this.classification.getId());
         }
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public Type getType()
     {
         return this.classification;
     }
 
     @Override
     public String toString()
     {
         return ToStringBuilder.reflectionToString(this);
     }
 }