--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/gov/nasa/jpf/util/automaton/Transition.java	Fri Jan 23 10:14:01 2015 -0800
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2014, United States Government, as represented by the
+ * Administrator of the National Aeronautics and Space Administration.
+ * All rights reserved.
+ *
+ * The Java Pathfinder core (jpf-core) platform is licensed under the
+ * Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ * 
+ *        http://www.apache.org/licenses/LICENSE-2.0. 
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ */
+package gov.nasa.jpf.util.automaton;
+
+import java.io.PrintStream;
+
+/**
+ *
+ */
+public class Transition {
+  
+  protected int id;
+  protected String label;
+  
+  protected State fromState;
+  protected State toState;
+  
+  public Transition (String label, State toState){
+    // the fromState is set when we add this transition to the state
+    this.toState = toState;
+
+    this.label = label;
+    // id will be set when this transition is added to its fromState
+  }
+  
+  protected void setFromState (State fromState){
+    this.fromState = fromState;
+  }
+  
+  protected void setId (int id){
+    this.id = id;
+  }
+  
+  public int getId(){
+    return id;
+  }
+  
+  public String getLabel(){
+    return label;
+  }
+  
+  public boolean checkGuard(){
+    // override if you have guards
+    return true;
+  }
+  
+  public void fire (){
+    // just here to be overridden, for Mealy machines
+  }
+  
+  public void printOn (PrintStream ps){
+    ps.printf("\t\t[%d] '%s' => state '%s'\n", id, label, toState.getLabel());
+  }
+}