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 com.google.common.base.MoreObjects;
11 import com.google.common.base.Preconditions;
12 import org.opendaylight.yangtools.concepts.Identifier;
15 * An abstract {@link Identifier} backed by an immutable object. Subclasses have no control over {@link #hashCode()}
16 * and {@link #equals(Object)}, hence they should not add any fields.
18 * @author Robert Varga
20 * @param <T> Object type
22 public abstract class AbstractIdentifier<T> implements Identifier {
23 private static final long serialVersionUID = 1L;
25 private final T value;
27 public AbstractIdentifier(final T value) {
28 this.value = Preconditions.checkNotNull(value);
31 public final T getValue() {
36 public final int hashCode() {
37 return value.hashCode();
41 public final boolean equals(final Object obj) {
49 return getClass().equals(obj.getClass()) && value.equals(((AbstractIdentifier<?>)obj).value);
53 public final String toString() {
54 return MoreObjects.toStringHelper(this).add("value", value).toString();