/*
    * 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.value;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.efaps.admin.datamodel.Attribute;
  import org.efaps.admin.datamodel.Type;
  import org.efaps.db.print.OneSelect;
  import org.efaps.db.wrapper.SQLSelect;
  import org.efaps.util.EFapsException;
  
  /**
   * Value Select to Select the OID of an instance.
   *
   * @author The eFaps Team
   * @version $Id$
   */
  public class OIDValueSelect
      extends AbstractValueSelect
  {
      /**
       * Attribute belonging to this IDValueSelect.
       */
      private Attribute attribute;
  
      /**
       * Type belonging to this OIDValueSelect.
       */
      private Type type;
  
      /**
       * @param _oneSelect    OneSelect
       */
      public OIDValueSelect(final OneSelect _oneSelect)
      {
          super(_oneSelect);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public int append2SQLSelect(final Type _type,
                                  final SQLSelect _select,
                                  final int _tableIndex,
                                  final int _colIndex)
      {
          int ret = 0;
          if (getParent() == null || !"type".equals(getParent().getValueType())) {
              this.type = _type;
              _select.column(_tableIndex, "ID");
              getColIndexs().add(_colIndex);
              ret++;
          }
          // in case that the type has a column for type it must be added
          if (this.type != null) {
              if (this.type.getMainTable().getSqlColType() != null) {
                  _select.column(_tableIndex, this.type.getMainTable().getSqlColType());
                  getColIndexs().add(_colIndex + ret);
                  ret++;
              }
          }
          this.attribute = _type.getAttribute("OID");
          return ret;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public Object getValue(final Object _object)
          throws EFapsException
      {
          final StringBuilder bldr = new StringBuilder();
          boolean retNull = false;
          if (_object instanceof Object[]) {
              final Object[] object = (Object[]) _object;
              if (object[0] == null || object[1] == null) {
                  retNull = true;
             } else {
                 bldr.append(object[1]).append(".").append(object[0]);
             }
         } else {
             if (_object == null) {
                 retNull = true;
             } else {
                 bldr.append(this.type.getId()).append(".").append(_object);
             }
         }
         return retNull ? null : bldr.toString();
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public Object getValue(final List<Object> _objectList)
         throws EFapsException
     {
         final List<Object> ret = new ArrayList<Object>();
         for (final Object object : _objectList) {
             ret.add(getValue(object));
         }
         return _objectList.size() > 0 ? (ret.size() > 1 ? ret : ret.get(0)) : null;
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String getValueType()
     {
         return "oid";
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public Attribute getAttribute()
     {
         return this.attribute;
     }
 
     /**
      * Getter method for the instance variable {@link #type}.
      *
      * @return value of instance variable {@link #type}
      */
     public Type getType()
     {
         return this.type;
     }
 
     /**
      * Setter method for instance variable {@link #type}.
      *
      * @param _type value for instance variable {@link #type}
      */
 
     public void setType(final Type _type)
     {
         this.type = _type;
     }
 }