1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Copyright 2001-2004 The Apache Software Foundation.
   7  *
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *     http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  */
  20 /*
  21  * $Id: FilteredStepIterator.java,v 1.2.4.1 2005/09/06 06:20:13 pvedula Exp $
  22  */
  23 
  24 package com.sun.org.apache.xalan.internal.xsltc.dom;
  25 
  26 import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator;
  27 
  28 /**
  29  * Extends a StepIterator by adding the ability to filter nodes. It
  30  * uses filters similar to those of a FilterIterator.
  31  * @author Jacek Ambroziak
  32  * @author Santiago Pericas-Geertsen
  33  * @author Morten Jorgensen
  34  */
  35 public final class FilteredStepIterator extends StepIterator {
  36 
  37     private Filter _filter;
  38 
  39     public FilteredStepIterator(DTMAxisIterator source,
  40                                 DTMAxisIterator iterator,
  41                                 Filter filter) {
  42         super(source, iterator);
  43         _filter = filter;
  44     }
  45 
  46     public int next() {
  47         int node;
  48         while ((node = super.next()) != END) {
  49             if (_filter.test(node)) {
  50                 return returnNode(node);
  51             }
  52         }
  53         return node;
  54     }
  55 
  56 }