SymTabASTIterator


1   
2   // Transmogrify License
3   // 
4   // Copyright (c) 2001, ThoughtWorks, Inc.
5   // All rights reserved.
6   // Redistribution and use in source and binary forms, with or without
7   // modification, are permitted provided that the following conditions
8   // are met:
9   // - Redistributions of source code must retain the above copyright notice,
10  //   this list of conditions and the following disclaimer.
11  // - Redistributions in binary form must reproduce the above copyright
12  // notice, this list of conditions and the following disclaimer in the
13  // documentation and/or other materials provided with the distribution.
14  // Neither the name of the ThoughtWorks, Inc. nor the names of its
15  // contributors may be used to endorse or promote products derived from this
16  // software without specific prior written permission.
17  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19  // TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20  // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
21  // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22  // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24  // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25  // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26  // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27  // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  
29  package com.puppycrawl.tools.checkstyle.checks.usage.transmogrify;
30  
31  import java.util.Iterator  ;
32  import java.util.NoSuchElementException  ;
33  
34  /**
35   * An iterator for the children of a tree node.
36   *
37   * @version 1.0
38   * @since 1.0
39   * @see Iterator
40   */
41  public class SymTabASTIterator implements Iterator   {
42    private SymTabAST _current;
43  
44    /**
45     * Creates a new <tt>SymTabASTIterator</tt>.
46     *
47     * @param parent the node whose children will be iterated over.
48     */
49    public SymTabASTIterator(SymTabAST parent) {
50      _current = (SymTabAST)parent.getFirstChild();
51    }
52  
53    /**
54     * Whether the node has another child.  (In other words, returns
55     * <tt>true</tt> if <tt>next</tt> would return an element rather than
56     * throwing an exception.)
57     *
58     * @return the next child node.
59     */
60    public boolean hasNext() {
61      return (_current != null);
62    }
63  
64    /**
65     * The next child node.
66     *
67     * @return the next child node.
68     */
69    public Object   next() {
70      if (!hasNext()) {
71        throw new NoSuchElementException  ();
72      }
73  
74      Object   result = _current;
75      _current = (SymTabAST)_current.getNextSibling();
76  
77      return result;
78    }
79  
80    /**
81     * The next child node.
82     *
83     * @return the next child node.
84     */
85    public SymTabAST nextChild() {
86      return (SymTabAST)next();
87    }
88  
89    /**
90     * Unsupported operation
91     */
92    public void remove() {
93      throw new UnsupportedOperationException  ();
94    }
95  }
96
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags