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 */
20 package org.apache.mina.core.session;
21
22 import java.io.Serializable;
23 import java.util.Map;
24
25 /**
26 * A key that makes its parent {@link Map} or session attribute to search
27 * fast while being debug-friendly by providing the string representation.
28 *
29 * @author The Apache MINA Project (dev@mina.apache.org)
30 */
31 public final class AttributeKey implements Serializable {
32 /** The serial version UID */
33 private static final long serialVersionUID = -583377473376683096L;
34
35 /** The attribute's name */
36 private final String name;
37
38 /**
39 * Creates a new instance. It's built from :
40 * - the class' name
41 * - the attribute's name
42 * - this attribute hashCode
43 */
44 public AttributeKey(Class<?> source, String name) {
45 this.name = source.getName() + '.' + name + '@' + Integer.toHexString(this.hashCode());
46 }
47
48 /**
49 * The String representation of tis objection is its constructed name.
50 */
51 @Override
52 public String toString() {
53 return name;
54 }
55 }