01: /*
02: * $Id: ClearField.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:
30: import org.ofbiz.base.util.*;
31: import org.ofbiz.minilang.*;
32: import org.ofbiz.minilang.method.*;
33:
34: /**
35: * Clears the specified field
36: *
37: * @author <a href="mailto:jonesde@ofbiz.org">David E. Jones</a>
38: * @version $Revision: 1.1 $
39: * @since 2.0
40: */
41: public class ClearField extends MethodOperation {
42:
43: public static final String module = ClearField.class.getName();
44:
45: ContextAccessor mapAcsr;
46: ContextAccessor fieldAcsr;
47:
48: public ClearField(Element element, SimpleMethod simpleMethod) {
49: super (element, simpleMethod);
50: mapAcsr = new ContextAccessor(element.getAttribute("map-name"));
51: fieldAcsr = new ContextAccessor(element
52: .getAttribute("field-name"));
53: }
54:
55: public boolean exec(MethodContext methodContext) {
56: if (!mapAcsr.isEmpty()) {
57: Map toMap = (Map) mapAcsr.get(methodContext);
58:
59: if (toMap == null) {
60: // it seems silly to create a new map, but necessary since whenever
61: // an env field like a Map or List is referenced it should be created, even if empty
62: if (Debug.verboseOn())
63: Debug.logVerbose("Map not found with name "
64: + mapAcsr + ", creating new map", module);
65: toMap = new HashMap();
66: mapAcsr.put(methodContext, toMap);
67: }
68:
69: fieldAcsr.put(toMap, null, methodContext);
70: } else {
71: fieldAcsr.put(methodContext, null);
72: }
73:
74: return true;
75: }
76: }
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