+++ /dev/null
-/*
- * Copyright (c) 2003-2005 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 peersim.config.*;
-import peersim.core.*;
-
-/**
- * Normalizes the values of a protocol vector.
- * The normalization is based on the L1 norm, that is, the sum of the
- * absolute values of the vector elements. Parameter {@value #PAR_L1} defines
- * the L1 norm that the vector will have after normalization.
- * @see VectControl
- * @see peersim.vector
- */
-public class Normalizer extends VectControl
-{
-
-// --------------------------------------------------------------------------
-// Parameters
-// --------------------------------------------------------------------------
-
-/**
- * The L1 norm (sum of absolute values) to normalize to. After the operation the
- * L1 norm will be the value given here. Defaults to 1.
- * @config
- */
-private static final String PAR_L1 = "l1";
-
-
-// --------------------------------------------------------------------------
-// Fields
-// --------------------------------------------------------------------------
-
-/** L1 norm */
-private final double l1;
-
-
-// --------------------------------------------------------------------------
-// Initialization
-// --------------------------------------------------------------------------
-
-/**
- * Standard constructor that reads the configuration parameters.
- * Invoked by the simulation engine.
- * @param prefix the configuration prefix for this class
- */
-public Normalizer(String prefix)
-{
- super(prefix);
- l1 = Configuration.getDouble(prefix + "." + PAR_L1, 1);
-
- if( setter.isInteger() )
- throw new IllegalParameterException(prefix + "." + PAR_METHOD,
- "setter value must be floating point, instead of "+
- setter.getType());
-
- if( setter.getType() != getter.getType() )
- throw new IllegalParameterException(prefix + "." + PAR_GETTER,
- "getter and setter must have the same numeric type, "+
- "but we have "+setter.getType()+" and "+getter.getType());
-}
-
-//--------------------------------------------------------------------------
-//Methods
-//--------------------------------------------------------------------------
-
-/**
- * Makes the sum of the absolute values (L1 norm) equal to the value
- * given in the configuration parameter {@value #PAR_L1}. If the value is
- * negative, the L1 norm will be the absolute value and the vector elements
- * change sign.
- * @return always false
- */
-public boolean execute() {
-
- double sum = 0.0;
- for (int i = 0; i < Network.size(); ++i)
- {
- sum += getter.getDouble(i);
- }
- if (sum == 0.0)
- {
- throw new
- RuntimeException("Attempted to normalize all zero vector.");
- }
- double factor = l1 / sum;
- for (int i = 0; i < Network.size(); ++i)
- {
- double val = getter.getDouble(i)*factor;
- setter.set(i,val);
- }
- return false;
-}
-
-//--------------------------------------------------------------------------
-
-}
