1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.syncope.common.lib.types;
20
21 import java.util.Collections;
22 import java.util.HashMap;
23 import java.util.Map;
24
25 public final class ImplementationTypesHolder {
26
27 private static final Object MONITOR = new Object();
28
29 private static ImplementationTypesHolder INSTANCE;
30
31 public static ImplementationTypesHolder getInstance() {
32 synchronized (MONITOR) {
33 if (INSTANCE == null) {
34 INSTANCE = new ImplementationTypesHolder();
35 }
36 }
37 return INSTANCE;
38 }
39
40 private final Map<String, String> values = Collections.synchronizedMap(new HashMap<>());
41
42 private ImplementationTypesHolder() {
43 // private constructor for singleton
44 }
45
46 public void putAll(final Map<String, String> value2Class) {
47 this.values.putAll(value2Class);
48 }
49
50 public Map<String, String> getValues() {
51 return Collections.unmodifiableMap(values);
52 }
53 }