/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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 org.apache.myfaces.shared.trace;

 import java.util.Iterator;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 /**

  * Trace method calls to an iterator

  */

 public class TracingIterator<E> implements Iterator<E>

 {

     private final Iterator<E> _iterator;

     private final TracingSupport _tracer;

     public TracingIterator(Iterator<E> iterator)

     {

         _iterator = iterator;

         _tracer = new TracingSupport(iterator.getClass());

     }

     public static <E> TracingIterator<E> create(Iterator<E> iterator)

     {

         return new TracingIterator<E>(iterator);

     }

     /**

      * @return the iterator

      */

     public Iterator<E> getIterator()

     {

         return _iterator;

     }

     public boolean hasNext()

     {

         return _tracer.trace("hasNext", new Closure<Boolean>()

         {

             public Boolean call()

             {

                 return _iterator.hasNext();

             }

         });

     }

     public E next()

     {

         return _tracer.trace("next", new Closure<E>()

         {

             public E call()

             {

                 return _iterator.next();

             }

         });

     }

     public void remove()

     {

         _tracer.trace("remove", new Closure<Object>()

         {

             public Object call()

             {

                 _iterator.remove();

                 return Void.class;

             }

         });

     }

     /**

      * @return

      * @see org.apache.myfaces.shared.trace.TracingSupport#getLevel()

      */

     public Level getLevel()

     {

         return _tracer.getLevel();

     }

     /**

      * @return

      * @see org.apache.myfaces.shared.trace.TracingSupport#getLogger()

      */

     public Logger getLogger()

     {

         return _tracer.getLogger();

     }

     /**

      * @return

      * @see org.apache.myfaces.shared.trace.TracingSupport#getSourceClass()

      */

     public String getSourceClass()

     {

         return _tracer.getSourceClass();

     }

     /**

      * @param level

      * @see org.apache.myfaces.shared.trace.TracingSupport#setLevel(java.util.logging.Level)

      */

     public void setLevel(Level level)

     {

         _tracer.setLevel(level);

     }

     /**

      * @param logger

      * @see org.apache.myfaces.shared.trace.TracingSupport#setLogger(java.util.logging.Logger)

      */

     public void setLogger(Logger logger)

     {

         _tracer.setLogger(logger);

     }

     /**

      * @param className

      * @see org.apache.myfaces.shared.trace.TracingSupport#setSourceClass(java.lang.String)

      */

     public void setSourceClass(String className)

     {

         _tracer.setSourceClass(className);

     }

 }