/*
    * The baseCode project
    *
    * Copyright (c) 2006 University of British Columbia
    *
    * 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.
   *
   */
  package ubic.basecode.util;
  
  import ubic.basecode.io.ByteArrayConverter;
  
  import java.math.BigInteger;
  import java.nio.charset.Charset;
  import java.sql.Blob;
  import java.sql.SQLException;
  
  /**
   * @author pavlidis
   */
  public class SQLUtils {
  
      private static ByteArrayConverter#ByteArrayConverter">ByteArrayConverter bac = new ByteArrayConverter();
  
      /**
       * Convert a blob to a string.
       */
      public static String blobToString( Blob blob, Charset charset ) throws SQLException {
          if ( blob == null ) {
              return null;
          }
          return new String( blob.getBytes( 1L, ( int ) blob.length() ), charset );
      }
  
      /**
       * Convert an arbitrary object to a {@link Long} ID.
       */
      public static Long asId( Object o ) {
          if ( o == null ) return null;
          if ( o instanceof BigInteger ) {
              return ( ( BigInteger ) o ).longValue();
          } else if ( o instanceof Long ) {
              return ( Long ) o;
          } else if ( o instanceof Integer ) {
              return ( ( Integer ) o ).longValue();
          } else {
              throw new IllegalArgumentException( "Cannot figure out how to turn object to an id: " + o.getClass().getName() );
          }
      }
  }