1 /**
2 * Logback: the reliable, generic, fast and flexible logging framework.
3 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
4 *
5 * This program and the accompanying materials are dual-licensed under
6 * either the terms of the Eclipse Public License v1.0 as published by
7 * the Eclipse Foundation
8 *
9 * or (per the licensee's choosing)
10 *
11 * under the terms of the GNU Lesser General Public License version 2.1
12 * as published by the Free Software Foundation.
13 */
14 package ch.qos.logback.core.property;
15
16 import ch.qos.logback.core.PropertyDefinerBase;
17 import ch.qos.logback.core.joran.action.PropertyAction;
18 import ch.qos.logback.core.util.OptionHelper;
19
20 import java.io.File;
21
22 /**
23 * In conjunction with {@link PropertyAction}
24 * sets the named variable to "true" if the file specified by
25 * {@link #setPath(String) path} property exists, to "false" otherwise.
26 *
27 * @see #getPropertyValue()
28 *
29 * @author Ceki Gülcü
30 */
31 public class FileExistsPropertyDefiner extends PropertyDefinerBase {
32
33 String path;
34
35 public String getPath() {
36 return path;
37 }
38
39 /**
40 * The path for the file to search for.
41 *
42 * @param path
43 */
44 public void setPath(String path) {
45 this.path = path;
46 }
47
48 /**
49 * Returns "true" if the file specified by {@link #setPath(String) path}
50 * property exists. Returns "false" otherwise.
51 *
52 * @return "true"|"false" depending on the existence of file
53 */
54 public String getPropertyValue() {
55 if (OptionHelper.isNullOrEmptyOrAllSpaces(path)) {
56 addError("The \"path\" property must be set.");
57 return null;
58 }
59
60 File file = new File(path);
61 return booleanAsStr(file.exists());
62 }
63 }