01 /*
02 * Copyright 2008-2017 the original author or authors.
03 *
04 * Licensed under the Apache License, Version 2.0 (the "License");
05 * you may not use this file except in compliance with the License.
06 * You may obtain a copy of the License at
07 *
08 * http://www.apache.org/licenses/LICENSE-2.0
09 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.codehaus.griffon.runtime.util;
17
18 import griffon.util.CompositeResourceBundle;
19 import griffon.util.CompositeResourceBundleBuilder;
20
21 import javax.annotation.Nonnull;
22 import java.util.ArrayList;
23 import java.util.Collection;
24 import java.util.List;
25 import java.util.Locale;
26 import java.util.ResourceBundle;
27
28 import static griffon.util.GriffonNameUtils.requireNonBlank;
29 import static java.util.Objects.requireNonNull;
30
31 /**
32 * @author Andres Almiray
33 * @since 2.0.0
34 */
35 public abstract class AbstractCompositeResourceBundleBuilder implements CompositeResourceBundleBuilder {
36 protected static final String ERROR_BASENAME_BLANK = "Argument 'basename' must not be blank";
37 protected static final String ERROR_LOCALE_NULL = "Argument 'locale' must not be null";
38
39 @Override
40 @Nonnull
41 public ResourceBundle create(@Nonnull String basename) {
42 return create(basename, Locale.getDefault());
43 }
44
45 @Override
46 @Nonnull
47 public ResourceBundle create(@Nonnull String basename, @Nonnull Locale locale) {
48 requireNonBlank(basename, ERROR_BASENAME_BLANK);
49 requireNonNull(locale, ERROR_LOCALE_NULL);
50
51 initialize();
52
53 String[] combinations = {
54 locale.getLanguage() + "_" + locale.getCountry() + "_" + locale.getVariant(),
55 locale.getLanguage() + "_" + locale.getCountry(),
56 locale.getLanguage()
57 };
58
59 basename = basename.replace('.', '/');
60 List<ResourceBundle> bundles = new ArrayList<>();
61 for (String suffix : combinations) {
62 if (suffix.endsWith("_")) { continue; }
63 bundles.addAll(loadBundlesFor(basename + "_" + suffix));
64 }
65 bundles.addAll(loadBundlesFor(basename));
66 if (bundles.size() == 0) {
67 throw new IllegalArgumentException("There are no ResourceBundle resources matching " + basename);
68 }
69
70 return new CompositeResourceBundle(bundles);
71 }
72
73 protected abstract void initialize();
74
75 @Nonnull
76 protected abstract Collection<ResourceBundle> loadBundlesFor(@Nonnull String basename);
77 }
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