NumberType


1   /*
2    * The contents of this file are subject to the terms 
3    * of the Common Development and Distribution License 
4    * (the License).  You may not use this file except in
5    * compliance with the License.
6    * 
7    * You can obtain a copy of the license at 
8    * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9    * glassfish/bootstrap/legal/CDDLv1.0.txt.
10   * See the License for the specific language governing 
11   * permissions and limitations under the License.
12   * 
13   * When distributing Covered Code, include this CDDL 
14   * Header Notice in each file and include the License file 
15   * at glassfish/bootstrap/legal/CDDLv1.0.txt.  
16   * If applicable, add the following below the CDDL Header, 
17   * with the fields enclosed by brackets [] replaced by
18   * you own identifying information: 
19   * "Portions Copyrighted [year] [name of copyright owner]"
20   * 
21   * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22   */
23  
24  /*
25   * NumberType.java
26   *
27   * Created on August 24, 2001
28   */
29  
30  package com.sun.jdo.spi.persistence.support.sqlstore.query.util.type;
31  
32  /** 
33   * This class is the super class for all integral and floating point types.
34   *
35   * @author  Michael Bouschen
36   * @version 0.1
37   */
38  public interface NumberType
39  {
40      /**
41       * Converts the specified value into a value of this numeric type.
42       * E.g. an Integer is converted into a Double, if this represents 
43       * the numeric type double.
44       * @param value value to be converted
45       * @return converted value
46       */
47      public Number   getValue(Number   value);
48      
49      /**
50       * Returns -value. 
51       * @param value value to be negated
52       * @return -value
53       */
54      public Number   negate(Number   value);
55  }
56

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