01: /*
02: * The contents of this file are subject to the
03: * Mozilla Public License Version 1.1 (the "License");
04: * you may not use this file except in compliance with the License.
05: * You may obtain a copy of the License at http://www.mozilla.org/MPL/
06: *
07: * Software distributed under the License is distributed on an "AS IS"
08: * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
09: * See the License for the specific language governing rights and
10: * limitations under the License.
11: *
12: * The Initial Developer of the Original Code is Simulacra Media Ltd.
13: * Portions created by Simulacra Media Ltd are Copyright (C) Simulacra Media Ltd, 2004.
14: *
15: * All Rights Reserved.
16: *
17: * Contributor(s):
18: */
19: package org.openharmonise.rm.commands;
20:
21: import org.openharmonise.rm.DataAccessException;
22: import org.openharmonise.rm.resources.lifecycle.Editable;
23:
24: /**
25: * Gets the pending versions of the 'command object', if it
26: * is an instance of <code>Editable</code>.
27: *
28: * @author Michael Bell
29: * @version $Revision: 1.3 $
30: *
31: */
32: public class CmdGetPendingVersions extends AbstractCmd {
33:
34: /**
35: * Creats an instance of the command.
36: *
37: */
38: public CmdGetPendingVersions() {
39: super ();
40: }
41:
42: /* (non-Javadoc)
43: * @see org.openharmonise.rm.commands.AbstractCmd#execute()
44: */
45: public Object execute(Context context) throws CommandException {
46: if ((m_commandObj instanceof Editable) == false) {
47: throw new InvalidCommandException(
48: "Command is not valid for this object:"
49: + m_commandObj.getClass());
50: }
51:
52: if (isAvailable(context) == false) {
53: throw new InvalidCommandException(
54: "Command is not available for this object");
55: }
56:
57: Editable editable = (Editable) getCommandObject(context);
58: Object cmdResult = null;
59:
60: try {
61: cmdResult = editable.getPendingVersions();
62: } catch (DataAccessException e) {
63: throw new CommandExecutionException(
64: "Error getting historical versions", e);
65: }
66:
67: return cmdResult;
68: }
69:
70: /* (non-Javadoc)
71: * @see org.openharmonise.rm.commands.AbstractCmd#getName()
72: */
73: public String getName() {
74: return "GetPendingVersions";
75: }
76:
77: /* (non-Javadoc)
78: * @see org.openharmonise.rm.commands.AbstractCmd#isValidCommandObject(java.lang.Object)
79: */
80: public boolean isValidCommandObject(Object obj) {
81: return (obj instanceof Editable);
82: }
83: }
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