2 * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yangtools.util;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.base.MoreObjects;
13 import org.opendaylight.yangtools.concepts.Identifier;
16 * An abstract {@link Identifier} backed by an immutable object. Subclasses have no control over {@link #hashCode()}
17 * and {@link #equals(Object)}, hence they should not add any fields.
19 * @author Robert Varga
21 * @param <T> Object type
23 public abstract class AbstractIdentifier<T> implements Identifier {
24 private static final long serialVersionUID = 1L;
26 private final T value;
28 public AbstractIdentifier(final T value) {
29 this.value = requireNonNull(value);
32 public final T getValue() {
37 public final int hashCode() {
38 return value.hashCode();
42 public final boolean equals(final Object obj) {
50 return getClass().equals(obj.getClass()) && value.equals(((AbstractIdentifier<?>)obj).value);
54 public final String toString() {
55 return MoreObjects.toStringHelper(this).add("value", value).toString();