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Java > Open Source Codes > org > ofbiz > minilang > method > envops > FirstFromList


1 /*
2  * $Id: FirstFromList.java 5462 2005-08-05 18:35:48Z jonesde $
3  *
4  * Copyright (c) 2001, 2002 The Open For Business Project - www.ofbiz.org
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included
14  * in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
20  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
21  * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
22  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23  */
24 package org.ofbiz.minilang.method.envops;
25
26 import java.util.*;
27
28 import org.w3c.dom.*;
29 import org.ofbiz.base.util.*;
30 import org.ofbiz.minilang.*;
31 import org.ofbiz.minilang.method.*;
32
33 /**
34  * Get the first entry from the list
35  *
36  * @author <a HREF="mailto:jonesde@ofbiz.org">David E. Jones</a>
37  * @version $Rev: 5462 $
38  * @since 2.0
39  */
40 public class FirstFromList extends MethodOperation {
41     
42     public static final String JavaDoc module = FirstFromList.class.getName();
43
44     ContextAccessor entryAcsr;
45     ContextAccessor listAcsr;
46
47     public FirstFromList(Element element, SimpleMethod simpleMethod) {
48         super(element, simpleMethod);
49         this.entryAcsr = new ContextAccessor(element.getAttribute("entry-name"));
50         this.listAcsr = new ContextAccessor(element.getAttribute("list-name"));
51     }
52
53     public boolean exec(MethodContext methodContext) {
54         Object JavaDoc fieldVal = null;
55
56         if (listAcsr.isEmpty()) {
57             Debug.logWarning("No list-name specified in iterate tag, doing nothing", module);
58             return true;
59         }
60
61         List theList = (List) listAcsr.get(methodContext);
62
63         if (theList == null) {
64             if (Debug.infoOn()) Debug.logInfo("List not found with name " + listAcsr + ", doing nothing", module);
65             return true;
66         }
67         if (theList.size() == 0) {
68             if (Debug.verboseOn()) Debug.logVerbose("List with name " + listAcsr + " has zero entries, doing nothing", module);
69             return true;
70         }
71
72         entryAcsr.put(methodContext, theList.get(0));
73         return true;
74     }
75
76     public String JavaDoc rawString() {
77         return "<first-from-list list-name=\"" + this.listAcsr + "\" entry-name=\"" + this.entryAcsr + "\"/>";
78     }
79     public String JavaDoc expandedString(MethodContext methodContext) {
80         // TODO: something more than a stub/dummy
81 return this.rawString();
82     }
83 }
84
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