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 package org.apidesign.javap;

 /**

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 public final class TrapDataIterator {

     private final java.util.Map<Short, TrapData> exStart = new java.util.HashMap<Short, TrapData>();

     private final java.util.Map<Short, TrapData> exStop = new java.util.HashMap<Short, TrapData>();

     private final java.util.Deque<TrapData> current = new java.util.ArrayDeque<TrapData>();

     TrapDataIterator(Vector exceptionTable) {

         for (int i=0 ; i < exceptionTable.size(); i++) {

             final TrapData td = (TrapData)exceptionTable.elementAt(i);

             exStart.put(td.start_pc, td);

             exStop.put(td.end_pc, td);

         }

     }

     public void advanceTo(int i) {

         TrapData e = exStart.get((short) i);

         if (e != null) {

             current.addFirst(e);

         }

         e = exStop.get((short) i);

         if (e != null) {

             current.remove(e);

         }

     }

     public boolean useTry() {

         return !current.isEmpty();

     }

     public TrapData[] current() {

         return current.toArray(new TrapData[0]);

     }

 }