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1   /*
2    /*
3    * Copyright 2005 John G. Wilson
4    *
5    * Licensed under the Apache License, Version 2.0 (the "License");
6    * you may not use this file except in compliance with the License.
7    * 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   */
18  
19  package groovy.util.slurpersupport;
20  
21  import java.util.Iterator;
22  import java.util.Map;
23  
24  import groovy.lang.Closure;
25  
26  /***
27   * @author John Wilson
28   *
29   */
30  
31  public class FilteredAttributes extends Attributes {
32    private final Closure closure;
33    
34    public FilteredAttributes(final GPathResult parent, final Closure closure, final Map namespaceTagHints) {
35      super(parent, parent.name, namespaceTagHints);
36      this.closure = closure;
37    }
38  
39    /* (non-Javadoc)
40     * @see org.codehaus.groovy.sandbox.util.slurpersupport.NodeChildren#iterator()
41     */
42    public Iterator nodeIterator() {
43      return new NodeIterator(this.parent.iterator()) {
44                /* (non-Javadoc)
45                 * @see org.codehaus.groovy.sandbox.util.slurpersupport.NodeIterator#getNextNode(java.util.Iterator)
46                 */
47                protected Object getNextNode(final Iterator iter) {
48                  while (iter.hasNext()) {
49                  final Object node = iter.next();
50                  final Boolean result = (Boolean)FilteredAttributes.this.closure.call(new Object[]{node});
51                  
52                    if (result != null && result.booleanValue()) {
53                      return node;
54                    }
55                    }
56                    
57                    return null;
58                }   
59              };
60    }
61    
62  }