GroupI


1   /* @author rich
2    * Created on 05-Mar-2004
3    *
4    * This code is covered by a Creative Commons
5    * Attribution, Non Commercial, Share Alike license
6    * <a HREF="http://creativecommons.org/licenses/by-nc-sa/1.0">License</a>
7    */
8   package org.lsmp.djep.groupJep;
9   import org.nfunk.jep.type.*;
10  import org.nfunk.jep.*;
11  /**
12   * Represents a group with an identity, and addition operator.
13   * 
14   * @author Rich Morris
15   * Created on 05-Mar-2004
16   */
17  public interface GroupI {
18      /** Returns the identity element under + */
19      public Number   getZERO();
20      /** Get Inverse of a number */
21      public Number   getInverse(Number   num);
22      /** Get sum of the numbers */
23      public Number   add(Number   a,Number   b);
24      /** Get the difference of the numbers.
25       * i.e. a + (-b) */
26      public Number   sub(Number   a,Number   b);
27      /** whether two numbers are equal */
28      public boolean equals(Number   a,Number   b);
29      /** returns number given by the string */
30      public Number   valueOf(String   s);
31      /** returns a number factory for creating group elements from strings.
32       * Most groups which are subclasses of {@link org.lsmp.djep.groupJep.groups.Group Group} do not need to
33       * implement this method. */
34      public NumberFactory getNumberFactory();
35      /** adds the standard constants for this group */
36      public void addStandardConstants(JEP j);
37      /** adds the standard function for this group */
38      public void addStandardFunctions(JEP j);
39  }
40

A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame

Popular Tags