1 /*
2 * This file is part of Pease Plate Template Engine.
3 *
4 * Pease Plate Template Engine is free software: you can redistribute
5 * it and/or modify it under the terms of the GNU Lesser General
6 * Public License as published by the Free Software Foundation,
7 * either version 3 of the License, or any later version.
8 *
9 * Pease Plate Template Engine is distributed in the hope that it
10 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
11 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * See the GNU Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Pease Plate Template Engine. If not, see
16 * <http://www.gnu.org/licenses/>.
17 *
18 * Copyright (c) 2008 Manfred HANTSCHEL
19 */
20 package org.peaseplate.internal.lang.command;
21
22 import org.peaseplate.TemplateRuntimeException;
23 import org.peaseplate.internal.BuildContext;
24 import org.peaseplate.locator.TemplateLocator;
25
26 public class PopCommand extends AbstractSingleParameterCommand {
27
28 public PopCommand(TemplateLocator locator, int line, int column, ICommand command) {
29 super(locator, line, column, command);
30 }
31
32 /**
33 * @see org.peaseplate.internal.lang.command.ICommand#call(BuildContext)
34 */
35 public Object call(BuildContext context) throws TemplateRuntimeException {
36 Object result = null;
37 Object stackedObject = context.popWorkingObject();
38
39 try {
40 if (getCommand() != null)
41 result = callCommand(context);
42 else
43 result = context.getWorkingObject();
44 }
45 finally {
46 context.pushWorkingObject(stackedObject);
47 }
48
49 return result;
50 }
51
52 /**
53 * @see java.lang.Object#toString()
54 */
55 @Override
56 public String toString() {
57 StringBuilder builder = new StringBuilder("$pop");
58
59 if (getCommand() != null)
60 builder.append(".").append(getCommand());
61
62 return builder.toString();
63 }
64
65 }