net.sourceforge.phpeclipse/src/net/sourceforge/phpeclipse/phpeditor/JavaAnnotationIterator.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpeclipse.phpeditor;
  12
  13 import java.util.Collections;
  14 import java.util.Iterator;
  15
  16 import org.eclipse.jface.text.source.Annotation;
  17 import org.eclipse.jface.text.source.IAnnotationModel;
  18
  19 /**
  20  * Filters problems based on their types.
  21  */
  22 public class JavaAnnotationIterator implements Iterator {
  23
  24         private Iterator fIterator;
  25
  26         private Annotation fNext;
  27
  28         private boolean fSkipIrrelevants;
  29
  30         private boolean fReturnAllAnnotations;
  31
  32         /**
  33          * Equivalent to
  34          * <code>JavaAnnotationIterator(model, skipIrrelevants, false)</code>.
  35          */
  36         public JavaAnnotationIterator(IAnnotationModel model,
  37                         boolean skipIrrelevants) {
  38                 this(model, skipIrrelevants, false);
  39         }
  40
  41         /**
  42          * Returns a new JavaAnnotationIterator.
  43          *
  44          * @param model
  45          *            the annotation model
  46          * @param skipIrrelevants
  47          *            whether to skip irrelevant annotations
  48          * @param returnAllAnnotations
  49          *            Whether to return non IJavaAnnotations as well
  50          */
  51         public JavaAnnotationIterator(IAnnotationModel model,
  52                         boolean skipIrrelevants, boolean returnAllAnnotations) {
  53                 fReturnAllAnnotations = returnAllAnnotations;
  54                 if (model != null)
  55                         fIterator = model.getAnnotationIterator();
  56                 else
  57                         fIterator = Collections.EMPTY_LIST.iterator();
  58                 fSkipIrrelevants = skipIrrelevants;
  59                 skip();
  60         }
  61
  62         private void skip() {
  63                 while (fIterator.hasNext()) {
  64                         Annotation next = (Annotation) fIterator.next();
  65                         if (next instanceof IJavaAnnotation) {
  66                                 if (fSkipIrrelevants) {
  67                                         if (!next.isMarkedDeleted()) {
  68                                                 fNext = next;
  69                                                 return;
  70                                         }
  71                                 } else {
  72                                         fNext = next;
  73                                         return;
  74                                 }
  75                         } else if (fReturnAllAnnotations) {
  76                                 fNext = next;
  77                                 return;
  78                         }
  79                 }
  80                 fNext = null;
  81         }
  82
  83         /*
  84          * @see Iterator#hasNext()
  85          */
  86         public boolean hasNext() {
  87                 return fNext != null;
  88         }
  89
  90         /*
  91          * @see Iterator#next()
  92          */
  93         public Object next() {
  94                 try {
  95                         return fNext;
  96                 } finally {
  97                         skip();
  98                 }
  99         }
 100
 101         /*
 102          * @see Iterator#remove()
 103          */
 104         public void remove() {
 105                 throw new UnsupportedOperationException();
 106         }
 107 }