Source code: com/sun/xacml/cond/cluster/FunctionCluster.java
1
2 /*
3 * @(#)FunctionCluster.java
4 *
5 * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistribution of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistribution in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * Neither the name of Sun Microsystems, Inc. or the names of contributors may
18 * be used to endorse or promote products derived from this software without
19 * specific prior written permission.
20 *
21 * This software is provided "AS IS," without a warranty of any kind. ALL
22 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
23 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
24 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
25 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
26 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
27 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
28 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
29 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
30 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
31 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
32 *
33 * You acknowledge that this software is not designed or intended for use in
34 * the design, construction, operation or maintenance of any nuclear facility.
35 */
36
37 package com.sun.xacml.cond.cluster;
38
39 import java.util.Set;
40
41
42 /**
43 * Interface used by classes that support more than one function. It's a
44 * common design model to have a single class support more than one XACML
45 * function. In those cases, you should provide a proxy that implements
46 * <code>FunctionCluster</code> in addition to the <code>Function</code>.
47 * This is particularly important for the run-time configuration system,
48 * which uses this interface to create "clusters" of functions and therefore
49 * can use a smaller configuration file.
50 *
51 * @since 1.2
52 * @author Seth Proctor
53 */
54 public interface FunctionCluster
55 {
56
57 /**
58 * Returns a single instance of each of the functions supported by
59 * some class. The <code>Set</code> must contain instances of
60 * <code>Function</code>, and it must be both non-null and non-empty.
61 * It may contain only a single <code>Function</code>.
62 * <p>
63 * Note that this is only used to return concrete <code>Function</code>s.
64 * It may not be used to report abstract functions.
65 *
66 * @return the functions supported by this class
67 */
68 public Set getSupportedFunctions();
69
70 }