1 /*
2 * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultExpr.java,v 1.14 2006/02/05 21:47:40 elharo Exp $
3 * $Revision: 1.14 $
4 * $Date: 2006/02/05 21:47:40 $
5 *
6 * ====================================================================
7 *
8 * Copyright 2000-2002 bob mcwhirter & James Strachan.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions are
13 * met:
14 *
15 * * Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 *
18 * * Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * * Neither the name of the Jaxen Project nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
27 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
29 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
30 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
31 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
32 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
33 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
34 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
35 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
36 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 *
38 * ====================================================================
39 * This software consists of voluntary contributions made by many
40 * individuals on behalf of the Jaxen Project and was originally
41 * created by bob mcwhirter <bob@werken.com> and
42 * James Strachan <jstrachan@apache.org>. For more information on the
43 * Jaxen Project, please see <http://www.jaxen.org/>.
44 *
45 * $Id: DefaultExpr.java,v 1.14 2006/02/05 21:47:40 elharo Exp $
46 */
47
48
49
50 package org.jaxen.expr;
51
52 import java.util.Iterator;
53 import java.util.List;
54
55 import org.jaxen.util.SingleObjectIterator;
56 import org.jaxen.util.SingletonList;
57
58 /***
59 * @deprecated this class will become non-public in the future;
60 * use the interface instead
61 */
62 public abstract class DefaultExpr implements Expr
63 {
64 public Expr simplify()
65 {
66 return this;
67 }
68
69 static public Iterator convertToIterator(Object obj)
70 {
71 if ( obj instanceof Iterator )
72 {
73 return (Iterator) obj;
74 }
75
76 if ( obj instanceof List )
77 {
78 return ((List)obj).iterator();
79 }
80
81 return new SingleObjectIterator( obj );
82 }
83
84 static public List convertToList(Object obj)
85 {
86 if ( obj instanceof List )
87 {
88 return (List) obj;
89 }
90
91 return new SingletonList(obj);
92 }
93 }