1 /*
2 * JBoss, Home of Professional Open Source.
3 * Copyright 2014 Red Hat, Inc., and individual contributors
4 * as indicated by the @author tags.
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * 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, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package io.undertow.util;
20
21 /**
22 * @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
23 */
24 class SimpleAttachmentKey<T> extends AttachmentKey<T> {
25 private final Class<T> valueClass;
26
27 SimpleAttachmentKey(final Class<T> valueClass) {
28 this.valueClass = valueClass;
29 }
30
31 public T cast(final Object value) {
32 return valueClass.cast(value);
33 }
34
35 @Override
36 public String toString() {
37 if (valueClass != null) {
38 StringBuilder sb = new StringBuilder(getClass().getName());
39 sb.append("<");
40 sb.append(valueClass.getName());
41 sb.append(">");
42 return sb.toString();
43 }
44 return super.toString();
45 }
46 }
47