1 /*
2 * Licensed under the Apache License, Version 2.0 (the "License");
3 * you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 * http://www.apache.org/licenses/LICENSE-2.0
7 *
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 * See the License for the specific language governing permissions and
12 * limitations under the License.
13 */
14
15 package org.basepom.mojo.propertyhelper.beans;
16
17 import static com.google.common.base.Preconditions.checkNotNull;
18 import static java.lang.String.format;
19
20 import org.basepom.mojo.propertyhelper.util.Log;
21
22 import java.util.Locale;
23
24 public enum IgnoreWarnFail {
25 IGNORE, WARN, FAIL;
26
27 private static final Log LOG = Log.findLog();
28
29 public static IgnoreWarnFail forString(final String value) {
30 checkNotNull(value, "the value can not be null");
31 return Enum.valueOf(IgnoreWarnFail.class, value.toUpperCase(Locale.ENGLISH));
32 }
33
34 /**
35 * Reacts on a given thing existing or not existing.
36 * <p>
37 * IGNORE: Do nothing. WARN: Display a warning message if the thing does not exist, otherwise do nothing. FAIL: Throws an exception if the thing does not
38 * exist.
39 * <p>
40 * Returns true if the thing should be create, false otherwise.
41 */
42 public static void checkState(final IgnoreWarnFail iwf, final boolean exists, final String thing) {
43 if (exists) {
44 return;
45 }
46
47 switch (iwf) {
48 case IGNORE:
49 return;
50 case WARN:
51 LOG.warn("'%s' does not exist!", thing);
52 break;
53 case FAIL:
54 throw new IllegalStateException(format("'%s' does not exist!", thing));
55 default:
56 throw new IllegalStateException("Unknown state: " + iwf);
57 }
58 }
59 }