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 griffon.util;
17
18 import javax.annotation.Nonnull;
19 import java.util.Enumeration;
20 import java.util.Iterator;
21 import java.util.LinkedHashMap;
22 import java.util.Map;
23 import java.util.NoSuchElementException;
24 import java.util.Properties;
25 import java.util.ResourceBundle;
26 import java.util.Set;
27
28 import static griffon.util.GriffonNameUtils.requireNonBlank;
29
30 /**
31 * @author Andres Almiray
32 * @since 2.10.0
33 */
34 public class PropertiesResourceBundle extends ResourceBundle {
35 private Map<String, Object> storage;
36
37 @SuppressWarnings({"unchecked", "rawtypes"})
38 public PropertiesResourceBundle(@Nonnull Properties properties) {
39 storage = new LinkedHashMap(properties);
40 }
41
42 public Object handleGetObject(String key) {
43 requireNonBlank(key, "Argument 'key' must not be null");
44 return storage.get(key);
45 }
46
47 public Enumeration<String> getKeys() {
48 ResourceBundle parent = this.parent;
49 final Enumeration<String> parentEnumeration = parent != null ? parent.getKeys() : null;
50 final Set<String> keySet = storage.keySet();
51 final Iterator<String> iterator = keySet.iterator();
52
53 return new Enumeration<String>() {
54 private String next = null;
55
56 @Override
57 public boolean hasMoreElements() {
58 if (this.next == null) {
59 if (iterator.hasNext()) {
60 this.next = iterator.next();
61 } else if (parentEnumeration != null) {
62 while (this.next == null && parentEnumeration.hasMoreElements()) {
63 this.next = parentEnumeration.nextElement();
64 if (keySet.contains(this.next)) {
65 this.next = null;
66 }
67 }
68 }
69 }
70
71 return this.next != null;
72 }
73
74 @Override
75 public String nextElement() {
76 if (hasMoreElements()) {
77 String key = this.next;
78 this.next = null;
79 return key;
80 } else {
81 throw new NoSuchElementException();
82 }
83 }
84 };
85 }
86
87 @Override
88 protected Set<String> handleKeySet() {
89 return storage.keySet();
90 }
91 }
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