NumericType


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   * NumericType.java
26   *
27   * Created on March 8, 2000
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 abstract class NumericType
39      extends PrimitiveType
40      implements NumberType
41  {
42      /**
43       *
44       */
45      public NumericType(String   name, Class   clazz, int enumType)
46      {
47          super(name, clazz, enumType);
48      }
49      
50      /**
51       * A numeric type defines an ordering.
52       */
53      public boolean isOrderable()
54      {
55          return true;
56      }
57  
58      /**
59       * Converts the specified value into a value of this numeric type.
60       * E.g. an Integer is converted into a Double, if this represents 
61       * the numeric type double.
62       * @param value value to be converted
63       * @return converted value
64       */
65      public abstract Number   getValue(Number   value);
66  
67      /**
68       * Returns -value. 
69       * @param value value to be negated
70       * @return -value
71       */
72      public abstract Number   negate(Number   value);
73     
74  }
75
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