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 }