lcsim/src/org/lcsim/util/decision

diff -N ParticlePDGDecision.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ ParticlePDGDecision.java	4 Jul 2006 23:57:23 -0000	1.1
@@ -0,0 +1,32 @@

+package org.lcsim.util.decision;
+
+import hep.physics.particle.Particle;
+import org.lcsim.util.decision.DecisionMakerSingle;
+
+/**
+ * Filter Particles according to their PDG code.
+ *
+ * @version $Id: ParticlePDGDecision.java,v 1.1 2006/07/04 23:57:23 mcharles Exp $
+ */
+
+public class ParticlePDGDecision implements DecisionMakerSingle<Particle> 
+{
+    /**
+     * Constructor. 
+     * 
+     * @param pdg Require that abs(PDG) of particle matches this.
+     */
+    public ParticlePDGDecision(int pdg) {
+	m_requiredPDG = pdg;
+    }
+
+    /**
+     * Return true if the absolute value of the PDG code matches.
+     */
+    public boolean valid(Particle particleToTest) {
+	int thisPDG = particleToTest.getPDGID();
+	return( thisPDG == m_requiredPDG || thisPDG == -m_requiredPDG );
+    }
+
+    protected int m_requiredPDG;
+}