01: /*
02: * $Id: FirstFromList.java,v 1.1 2003/08/17 06:06:12 ajzeneski Exp $
03: *
04: * Copyright (c) 2001, 2002 The Open For Business Project - www.ofbiz.org
05: *
06: * Permission is hereby granted, free of charge, to any person obtaining a
07: * copy of this software and associated documentation files (the "Software"),
08: * to deal in the Software without restriction, including without limitation
09: * 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 $Revision: 1.1 $
38: * @since 2.0
39: */
40: public class FirstFromList extends MethodOperation {
41:
42: public static final String 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
50: .getAttribute("entry-name"));
51: this .listAcsr = new ContextAccessor(element
52: .getAttribute("list-name"));
53: }
54:
55: public boolean exec(MethodContext methodContext) {
56: Object fieldVal = null;
57:
58: if (listAcsr.isEmpty()) {
59: Debug
60: .logWarning(
61: "No list-name specified in iterate tag, doing nothing",
62: module);
63: return true;
64: }
65:
66: List theList = (List) listAcsr.get(methodContext);
67:
68: if (theList == null) {
69: if (Debug.infoOn())
70: Debug.logInfo("List not found with name " + listAcsr
71: + ", doing nothing", module);
72: return true;
73: }
74: if (theList.size() == 0) {
75: if (Debug.verboseOn())
76: Debug.logVerbose("List with name " + listAcsr
77: + " has zero entries, doing nothing", module);
78: return true;
79: }
80:
81: entryAcsr.put(methodContext, theList.get(0));
82: return true;
83: }
84: }
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