Coverage report

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org.apache.jetspeed.profiler.impl.ProfileFallbackIterator
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 1   
 /*
 2   
  * Licensed to the Apache Software Foundation (ASF) under one or more
 3   
  * contributor license agreements.  See the NOTICE file distributed with
 4   
  * this work for additional information regarding copyright ownership.
 5   
  * The ASF licenses this file to You under the Apache License, Version 2.0
 6   
  * (the "License"); you may not use this file except in compliance with
 7   
  * the License.  You may obtain a copy of the License at
 8   
  *
 9   
  *      http://www.apache.org/licenses/LICENSE-2.0
 10   
  *
 11   
  * Unless required by applicable law or agreed to in writing, software
 12   
  * distributed under the License is distributed on an "AS IS" BASIS,
 13   
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 14   
  * See the License for the specific language governing permissions and
 15   
  * limitations under the License.
 16   
  */
 17   
 package org.apache.jetspeed.profiler.impl;
 18   
 
 19   
 import java.util.Iterator;
 20   
 import java.util.List;
 21   
 
 22   
 import org.apache.jetspeed.profiler.ProfileLocatorProperty;
 23   
 import org.apache.jetspeed.profiler.rules.RuleCriterion;
 24   
 
 25   
 /**
 26   
  * ProfileFallbackIterator
 27   
  *
 28   
  * @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
 29   
  * @version $Id: ProfileFallbackIterator.java 516448 2007-03-09 16:25:47Z ate $
 30   
  */
 31   
 public class ProfileFallbackIterator implements Iterator
 32   
 {
 33   
     private ProfileLocatorControl locator;
 34  0 
     private int last = 0;
 35  0 
     private int state = RuleCriterion.FALLBACK_CONTINUE;
 36   
     private ProfileFallbackIterator()
 37  0 
     {
 38  0 
     }
 39   
 
 40   
     public ProfileFallbackIterator(ProfileLocatorControl locator)
 41  0 
     {
 42  0 
         this.locator = locator;
 43  0 
         last = locator.getElements().size() - 1;
 44  0 
     }
 45   
 
 46   
     /* (non-Javadoc)
 47   
      * @see java.util.Iterator#remove()
 48   
      */
 49   
     public void remove()
 50   
     {
 51   
         // TODO Auto-generated method stub
 52  0 
     }
 53   
 
 54   
     /* (non-Javadoc)
 55   
      * @see java.util.Iterator#hasNext()
 56   
      */
 57   
     public boolean hasNext()
 58   
     {
 59  0 
         boolean hasNext = false;
 60   
 
 61  0 
         List elements = locator.getElements();
 62   
 
 63  0 
         if (last < 0 || last >= elements.size())
 64   
         {
 65  0 
             state = RuleCriterion.FALLBACK_STOP;
 66  0 
             return false;
 67   
         }
 68   
 
 69  0 
         if (state == RuleCriterion.FALLBACK_STOP)
 70   
         {
 71  0 
             hasNext = false;
 72   
         }
 73  0 
         else if (state == RuleCriterion.FALLBACK_CONTINUE ||
 74   
                  state == RuleCriterion.FALLBACK_LOOP)
 75   
         {
 76  0 
             hasNext = true;
 77   
         }
 78   
 
 79  0 
         return hasNext;
 80   
     }
 81   
 
 82   
     /* (non-Javadoc)
 83   
      * @see java.util.Iterator#next()
 84   
      */
 85   
     public Object next()
 86   
     {
 87  0 
         ProfileLocatorProperty [] properties = null;
 88   
 
 89  0 
         if (last >= 0)
 90   
         {
 91   
             // generate properties list to return
 92  0 
             List elements = locator.getElements();
 93  0 
             properties = new ProfileLocatorProperty[last+1];
 94  0 
             ProfileLocatorProperty lastElement = null;
 95  0 
             Iterator it = elements.listIterator();
 96  0 
             for (int count = 0; (count <= last) && it.hasNext(); count++)
 97   
             {
 98  0 
                 lastElement = (ProfileLocatorProperty)it.next();
 99  0 
                 properties[count] = lastElement;
 100   
             }
 101   
 
 102   
             // modify iterator state based on fallback type;
 103   
             // performed here to prevent multiple calls to
 104   
             // hasNext() from changing iterator state
 105  0 
             state = lastElement.getFallbackType();
 106  0 
             last--;
 107   
         }
 108   
 
 109  0 
         return properties;
 110   
     }
 111   
 }

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