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Java > Open Source Codes > com > puppycrawl > tools > checkstyle > checks > xpath > AttributeAxisIterator


1 ////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code for adherence to a set of rules.
3 // Copyright (C) 2001-2003 Oliver Burn
4 //
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Lesser General Public
7 // License as published by the Free Software Foundation; either
8 // version 2.1 of the License, or (at your option) any later version.
9 //
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Lesser General Public License for more details.
14 //
15 // You should have received a copy of the GNU Lesser General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 ////////////////////////////////////////////////////////////////////////////////
19 package com.puppycrawl.tools.checkstyle.checks.xpath;
20
21 import java.lang.reflect.InvocationTargetException JavaDoc;
22 import java.util.ArrayList JavaDoc;
23 import java.util.HashMap JavaDoc;
24 import java.util.Iterator JavaDoc;
25 import java.util.List JavaDoc;
26 import java.util.Map JavaDoc;
27 import java.util.Set JavaDoc;
28
29 import org.apache.commons.beanutils.BeanUtils;
30
31 import com.puppycrawl.tools.checkstyle.api.DetailAST;
32
33 /**
34  * Iterator for an attribute axis of an XPath element. The XPath
35  * element is a DetailAST. Attributes correspond to bean
36  * properties of the DetailAST.
37  * @author Rick Giles
38  */
39 public class AttributeAxisIterator
40     implements Iterator JavaDoc
41 {
42     /** actual iterator */
43     private Iterator JavaDoc mIter = (new ArrayList JavaDoc()).iterator();
44
45     /**
46      * Constructs a <code>AttributeAxisIterator</code> for a
47      * DetailAST element.
48      * @param aAST the DetailAST element
49      */
50     public AttributeAxisIterator(DetailAST aAST)
51     {
52         Map JavaDoc props = new HashMap JavaDoc();
53         //use BeanUtils to get the properties
54 try {
55             props = BeanUtils.describe(aAST);
56         }
57         catch (IllegalAccessException JavaDoc e) {
58             // TODO Auto-generated catch block
59 e.printStackTrace();
60         }
61         catch (InvocationTargetException JavaDoc e) {
62             // TODO Auto-generated catch block
63 e.printStackTrace();
64         }
65         catch (NoSuchMethodException JavaDoc e) {
66             // TODO Auto-generated catch block
67 e.printStackTrace();
68         }
69         // add attributes for the properties to a list and
70 // set the iterator to an iterator over that list.
71 final List JavaDoc attributes = new ArrayList JavaDoc(props.size());
72         final Set JavaDoc values = props.keySet();
73         for (Iterator JavaDoc iter = values.iterator(); iter.hasNext();) {
74             final String JavaDoc name = (String JavaDoc) iter.next();
75             final String JavaDoc value = (String JavaDoc) props.get(name);
76             attributes.add(new Attribute(aAST, name, value));
77         }
78         mIter = attributes.iterator();
79     }
80
81     /**@see java.util.Iterator#next() */
82     public Object JavaDoc next()
83     {
84         return mIter.next();
85     }
86
87     /** @see java.util.Iterator#hasNext() */
88     public boolean hasNext()
89     {
90         return mIter.hasNext();
91     }
92
93     /** @see java.util.Iterator#remove() */
94     public void remove()
95     {
96         mIter.remove();
97     }
98 }
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