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.eclipse.jdt.annotation.NonNull;
14 import org.opendaylight.yangtools.concepts.Identifier;
17 * An abstract {@link Identifier} backed by an immutable object. Subclasses have no control over {@link #hashCode()}
18 * and {@link #equals(Object)}, hence they should not add any fields.
20 * @author Robert Varga
22 * @param <T> Object type
24 public abstract class AbstractIdentifier<T> implements Identifier {
25 private static final long serialVersionUID = 1L;
27 private final @NonNull T value;
29 public AbstractIdentifier(final @NonNull T value) {
30 this.value = requireNonNull(value);
33 public final @NonNull T getValue() {
38 public final int hashCode() {
39 return value.hashCode();
43 public final boolean equals(final Object obj) {
51 return getClass().equals(obj.getClass()) && value.equals(((AbstractIdentifier<?>)obj).value);
55 public final @NonNull String toString() {
56 return MoreObjects.toStringHelper(this).add("value", value).toString();