--- /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.*;
+
+/**
+ * Initializes a protocol vector with values in the range [{@value #PAR_MIN},
+ * {@value #PAR_MAX}] (inclusive both ends), linearly increasing.
+ * @see VectControl
+ * @see peersim.vector
+ */
+public class LinearDistribution extends VectControl
+{
+
+//--------------------------------------------------------------------------
+//Parameters
+//--------------------------------------------------------------------------
+
+/**
+ * Upper end of the interval..
+ * @config
+ */
+private static final String PAR_MAX = "max";
+
+/**
+ * Lower end of the interval. Defaults to -{@value #PAR_MAX}.
+ * @config
+ */
+private static final String PAR_MIN = "min";
+
+// --------------------------------------------------------------------------
+// Fields
+// --------------------------------------------------------------------------
+
+/** Minimum value */
+private final Number min;
+
+/** Maximum value */
+private final Number max;
+
+/** Step value */
+private final double step;
+
+// --------------------------------------------------------------------------
+// Initialization
+// --------------------------------------------------------------------------
+
+/**
+ * Standard constructor that reads the configuration parameters.
+ * Invoked by the simulation engine.
+ * @param prefix the configuration prefix for this class
+ */
+public LinearDistribution(String prefix)
+{
+ super(prefix);
+
+ // Read parameters based on type
+ if (setter.isInteger()) {
+ max=Long.valueOf(Configuration.getLong(prefix + "." + PAR_MAX));
+ min=Long.valueOf(Configuration.getLong(prefix + "." + PAR_MIN,
+ -max.longValue()));
+ step= (max.longValue()-min.longValue())/
+ ((double)(Network.size()-1));
+ } else { // we know it's double or float
+ max = new Double(Configuration.getDouble(prefix+"."+PAR_MAX));
+ min = new Double(Configuration.getDouble(prefix+"."+PAR_MIN,
+ -max.doubleValue()));
+ step= (max.doubleValue()-min.doubleValue())/(Network.size()-1);
+ }
+}
+
+// --------------------------------------------------------------------------
+// Methods
+// --------------------------------------------------------------------------
+
+/**
+ * Initializes a protocol vector with values in the range [{@value #PAR_MIN},
+ * {@value #PAR_MAX}] (inclusive both ends), linearly increasing.
+ * @return always false
+ */
+public boolean execute() {
+
+ if ( setter.isInteger() )
+ {
+ for(int i=0; i<Network.size(); ++i)
+ {
+ // we avoid the entire expression being cast to double
+ setter.set(i,Math.round(i*step)+min.longValue());
+ }
+ }
+ else
+ {
+ for(int i=0; i<Network.size(); ++i)
+ {
+ setter.set(i,i*step+min.doubleValue());
+ }
+ }
+
+ return false;
+}
+
+
+}
+
+
