J2SEDataValueFactory.java :  » Database-DBMS » db-derby-10.2 » org » apache » derby » iapi » types » Java Open Source

/*

   Derby - Class org.apache.derby.iapi.types.J2SEDataValueFactory

   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.derby.iapi.types;

import java.util.Properties;

import org.apache.derby.iapi.error.StandardException;

/**
 * DataValueFactory implementation for J2SE.
 * Uses SQLDecimal for DECIMAL which implements
 * DECIMAL functionality using java.math.BigDecimal.
 *
 * @see DataValueFactory
 */
public class J2SEDataValueFactory extends DataValueFactoryImpl
{
  public J2SEDataValueFactory() {
  }

     public void boot(boolean create, Properties properties) throws StandardException {
       
       NumberDataType.MINLONG_MINUS_ONE = SQLDecimal.MINLONG_MINUS_ONE;
       NumberDataType.MAXLONG_PLUS_ONE = SQLDecimal.MAXLONG_PLUS_ONE;

      super.boot(create, properties);
     }
  
  public NumberDataValue getDecimalDataValue(Long value,
      NumberDataValue previous) throws StandardException {
    if (previous == null)
      previous = new SQLDecimal();

    previous.setValue(value);
    return previous;
  }

  public NumberDataValue getDecimalDataValue(String value)
      throws StandardException {
    if (value != null)
      return new SQLDecimal(value);
    else
      return new SQLDecimal();
  }

  public NumberDataValue getNullDecimal(NumberDataValue dataValue) {
    if (dataValue == null) {
      return new SQLDecimal();
    } else {
      dataValue.setToNull();
      return dataValue;
    }
  }
}