+++ /dev/null
-/*
- * Copyright (c) 2006 The BISON Project
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-package peersim.vector;
-
-import java.lang.reflect.*;
-import java.util.*;
-
-import peersim.core.*;
-
-/**
- * This class provides a generic implementation of the
- * <code>java.lang.Comparator<code> interface specialized
- * for {@link Node} objects. Nodes are compared based
- * on one of their protocols, on which a configurable
- * method is invoked. Both the protocol id and the
- * method are specified in the constructor.
- * <br>
- * This comparator can be used, for example, to sort
- * an array of nodes based on method <code>getValue</code>
- * associated to the protocol <code>pid</code>:
- * <PRE>
- * Comparator c = new VectorComparator(pid, "getValue");
- * Array.sort(Node[] array, c);
- * </PRE>
- * Note that differently from other classes in this package,
- * VectorComparator is declared programmatically in the code
- * and not in the configuration file. It is included in this
- * package because it shares the same philosophy of the other
- * classes.
- *
- * @author Alberto Montresor
- * @version $Revision: 1.1 $
- */
-public class VectorComparator implements Comparator
-{
-
-//--------------------------------------------------------------------------
-//Fields
-//--------------------------------------------------------------------------
-
-/** Protocol identifier of the protocol to be observed */
-private final int pid;
-
-/** The getter to be used to obtain comparable values */
-private final Method method;
-
-//--------------------------------------------------------------------------
-//Initialization
-//--------------------------------------------------------------------------
-
-public VectorComparator(int pid, String methodName)
-{
- this.pid = pid;
- Node n = Network.prototype;
- if (n == null) {
- throw new IllegalStateException("No prototype node can be used to search methods");
- }
- Object p = n.getProtocol(pid);
- Class c = p.getClass();
- try {
- method = GetterSetterFinder.getGetterMethod(c, methodName);
- } catch (NoSuchMethodException e) {
- throw new IllegalArgumentException(e.getMessage());
- }
-}
-
-
-public int compare(Object o1, Object o2)
-{
- try {
- Comparable c1 = (Comparable) method.invoke(((Node) o1).getProtocol(pid));
- Comparable c2 = (Comparable) method.invoke(((Node) o2).getProtocol(pid));
- return c1.compareTo(c2);
- } catch (InvocationTargetException e) {
- throw new RuntimeException(e.getCause().getMessage());
- } catch (IllegalAccessException e) {
- throw new RuntimeException(e.getCause().getMessage());
- }
-}
-
-}
