/*
    *  Licensed to the Apache Software Foundation (ASF) under one
    *  or more contributor license agreements.  See the NOTICE file
    *  distributed with this work for additional information
    *  regarding copyright ownership.  The ASF licenses this file
    *  to you 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.
   * 
   */
  package org.apache.directory.api.ldap.extras.extended.storedProcedure;
  
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.directory.api.asn1.ber.tlv.BerValue;
  import org.apache.directory.api.asn1.ber.tlv.IntegerDecoder;
  import org.apache.directory.api.asn1.ber.tlv.IntegerDecoderException;
  import org.apache.directory.api.i18n.I18n;
  import org.apache.directory.api.ldap.model.message.AbstractExtendedRequest;
  import org.apache.directory.api.util.StringConstants;
  import org.apache.directory.api.util.Strings;
  import org.apache.directory.api.util.exception.NotImplementedException;
  
  
  /**
   * An extended operation requesting the server to execute a stored procedure.
   * 
   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
   */
  public class StoredProcedureRequestImpl extends AbstractExtendedRequest implements StoredProcedureRequest
  {
      private String language = "Java";
  
      private byte[] procedure = StringConstants.EMPTY_BYTES;
  
      private List<StoredProcedureParameter> parameters = new ArrayList<StoredProcedureParameter>();
  
      private StoredProcedureResponse response;
  
  
      /**
       * Instantiates a new stored procedure request.
       *
       * @param messageId the message id
       */
      public StoredProcedureRequestImpl( int messageId )
      {
          super( messageId );
          this.setRequestName( EXTENSION_OID );
      }
  
  
      /**
       * Instantiates a new stored procedure request.
       */
      public StoredProcedureRequestImpl()
      {
          this.setRequestName( EXTENSION_OID );
      }
  
  
      /**
       * Instantiates a new stored procedure request.
       *
       * @param messageId the message id
       * @param procedure the procedure
       * @param language the language
       */
      public StoredProcedureRequestImpl( int messageId, String procedure, String language )
      {
          super( messageId );
          this.setRequestName( EXTENSION_OID );
          this.language = language;
          this.procedure = Strings.getBytesUtf8( procedure );
      }
  
  
      // -----------------------------------------------------------------------
      // Parameters of the Extended Request Payload
      // -----------------------------------------------------------------------
  
      /**
       * {@inheritDoc}
       */
      public String getLanguage()
      {
          return language;
      }
 
 
     /**
      * {@inheritDoc}
      */
     public void setLanguage( String language )
     {
         this.language = language;
     }
 
 
     public byte[] getProcedure()
     {
         if ( procedure == null )
         {
             return null;
         }
 
         final byte[] copy = new byte[procedure.length];
         System.arraycopy( procedure, 0, copy, 0, procedure.length );
         return copy;
     }
 
 
     public void setProcedure( byte[] procedure )
     {
         if ( procedure != null )
         {
             this.procedure = new byte[procedure.length];
             System.arraycopy( procedure, 0, this.procedure, 0, procedure.length );
         }
         else
         {
             this.procedure = null;
         }
     }
 
 
     public List<StoredProcedureParameter> getParameters()
     {
         return parameters;
     }
 
 
     public void addParameter( StoredProcedureParameter parameter )
     {
         parameters.add( parameter );
     }
 
 
     /**
      * {@inheritDoc}
      */
     public void setProcedure( String procedure )
     {
         this.procedure = Strings.getBytesUtf8( procedure );
     }
 
 
     /**
      * {@inheritDoc}
      */
     public String getProcedureSpecification()
     {
         return Strings.utf8ToString( procedure );
     }
 
 
     /**
      * {@inheritDoc}
      */
     public int size()
     {
         return parameters.size();
     }
 
 
     /**
      * {@inheritDoc}
      */
     public Object getParameterType( int index )
     {
         if ( !language.equals( "java" ) )
         {
             return parameters.get( index ).getType();
         }
 
         return getJavaParameterType( index );
     }
 
 
     /**
      * {@inheritDoc}
      */
     @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "BC_IMPOSSIBLE_INSTANCEOF",
         justification = "False positive")
     public Object getParameterTypeString( int index )
     {
         if ( !language.equals( "java" ) )
         {
             Object obj = parameters.get( index ).getType();
             if ( obj instanceof byte[] )
             {
                 return Strings.utf8ToString( ( byte[] ) obj );
             }
         }
 
         return getJavaParameterType( index );
     }
 
 
     /**
      * {@inheritDoc}
      */
     public Class<?> getJavaParameterType( int index )
     {
         throw new NotImplementedException( I18n.err( I18n.ERR_04175 ) );
     }
 
 
     /**
      * {@inheritDoc}
      */
     public Object getParameterValue( int index )
     {
         if ( !language.equals( "java" ) )
         {
             return parameters.get( index ).getValue();
         }
 
         return getJavaParameterValue( index );
     }
 
 
     /**
      * {@inheritDoc}
      */
     @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "BC_IMPOSSIBLE_INSTANCEOF",
         justification = "False positive")
     public Object getParameterValueString( int index )
     {
         if ( !language.equals( "java" ) )
         {
             Object obj = parameters.get( index ).getValue();
             if ( obj instanceof byte[] )
             {
                 String str = Strings.utf8ToString( ( byte[] ) obj );
                 String type = ( String ) getParameterTypeString( index );
 
                 if ( type.equals( "int" ) )
                 {
                     try
                     {
                         return IntegerDecoder.parse( new BerValue( ( byte[] ) obj ) );
                     }
                     catch ( IntegerDecoderException e )
                     {
                         throw new RuntimeException( "Failed to decode INTEGER: " +
                             Strings.dumpBytes( ( byte[] ) obj ), e );
                     }
                 }
                 else
                 {
                     return str;
                 }
             }
         }
 
         return getJavaParameterValue( index );
     }
 
 
     /**
      * {@inheritDoc}
      */
     public Object getJavaParameterValue( int index )
     {
         throw new NotImplementedException( I18n.err( I18n.ERR_04176 ) );
     }
 
 
     /**
      * {@inheritDoc}
      */
     public void addParameter( Object type, Object value )
     {
         /**
          *
          * FIXME: Why do we check here whether it's Java or not ?
          * Codec has nothing to do with these details.
          *
          if ( ! this.procedure.getLanguage().equals( "java" ) )
          {
              StoredProcedureParameter parameter = new StoredProcedureParameter();
              parameter.setType( ( byte[] ) type );
              parameter.setValue( ( byte[] ) value );
              this.procedure.addParameter( parameter );
          }
          
          * Replacing this code with the one below without the conditional check.
          
          */
 
         StoredProcedureParameter parameter = new StoredProcedureParameter();
         parameter.setType( ( byte[] ) type );
         parameter.setValue( ( byte[] ) value );
         parameters.add( parameter );
 
         // below here try to convert parameters to their appropriate byte[] representations
 
         /**
          * FIXME: What is this for?
          * 
          * throw new NotImplementedException( "conversion of value to java type not implemented" );
          */
     }
 
 
     @Override
     /**
      * {@inheritDoc}
      */
     public StoredProcedureResponse getResultResponse()
     {
         if ( response == null )
         {
             StoredProcedureResponseImpl spr = new StoredProcedureResponseImpl( getMessageId() );
             spr.setResponseName( EXTENSION_OID );
             response = spr;
         }
 
         return response;
     }
 }