net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/phpeditor/ProblemAnnotationIterator.java

   1 package net.sourceforge.phpeclipse.phpeditor;
   2
   3 /*
   4  * (c) Copyright IBM Corp. 2000, 2001.
   5  * All Rights Reserved.
   6  */
   7
   8 import java.util.Iterator;
   9
  10 import org.eclipse.jface.text.source.IAnnotationModel;
  11
  12 /**
  13  * Filters problems based on their types.
  14  */
  15 public class ProblemAnnotationIterator implements Iterator {
  16
  17         private Iterator fIterator;
  18
  19         private IProblemAnnotation fNext;
  20
  21         private boolean fSkipIrrelevants;
  22
  23         public ProblemAnnotationIterator(IAnnotationModel model,
  24                         boolean skipIrrelevants) {
  25                 fIterator = model.getAnnotationIterator();
  26                 fSkipIrrelevants = skipIrrelevants;
  27                 skip();
  28         }
  29
  30         private void skip() {
  31                 while (fIterator.hasNext()) {
  32                         Object next = fIterator.next();
  33                         if (next instanceof IProblemAnnotation) {
  34                                 IProblemAnnotation a = (IProblemAnnotation) next;
  35                                 if (fSkipIrrelevants) {
  36                                         if (a.isRelevant()) {
  37                                                 fNext = a;
  38                                                 return;
  39                                         }
  40                                 } else {
  41                                         fNext = a;
  42                                         return;
  43                                 }
  44                         }
  45                 }
  46                 fNext = null;
  47         }
  48
  49         /*
  50          * @see Iterator#hasNext()
  51          */
  52         public boolean hasNext() {
  53                 return fNext != null;
  54         }
  55
  56         /*
  57          * @see Iterator#next()
  58          */
  59         public Object next() {
  60                 try {
  61                         return fNext;
  62                 } finally {
  63                         skip();
  64                 }
  65         }
  66
  67         /*
  68          * @see Iterator#remove()
  69          */
  70         public void remove() {
  71                 throw new UnsupportedOperationException();
  72         }
  73 }