/*
* @(#)FunctionCluster.java
*
* Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
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* This software is provided "AS IS," without a warranty of any kind. ALL
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package com.sun.xacml.cond.cluster;
import java.util.Set;
import com.sun.xacml.cond.Function;
/**
* Interface used by classes that support more than one function. It's a
* common design model to have a single class support more than one XACML
* function. In those cases, you should provide a proxy that implements
* <code>FunctionCluster</code> in addition to the <code>Function</code>.
* This is particularly important for the run-time configuration system,
* which uses this interface to create "clusters" of functions and therefore
* can use a smaller configuration file.
*
* @since 1.2
* @author Seth Proctor
*/
public interface FunctionCluster
{
/**
* Returns a single instance of each of the functions supported by
* some class. The <code>Set</code> must contain instances of
* <code>Function</code>, and it must be both non-null and non-empty.
* It may contain only a single <code>Function</code>.
* <p>
* Note that this is only used to return concrete <code>Function</code>s.
* It may not be used to report abstract functions.
*
* @return the functions supported by this class
*/
public Set<Function> getSupportedFunctions();
}