2 * Copyright (c) 2014, 2015 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.controller.cluster.datastore.node.utils;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.cache.CacheBuilder;
13 import com.google.common.cache.CacheLoader;
14 import com.google.common.cache.LoadingCache;
16 import java.util.Objects;
17 import org.eclipse.jdt.annotation.NonNull;
18 import org.eclipse.jdt.annotation.Nullable;
19 import org.opendaylight.yangtools.concepts.Immutable;
20 import org.opendaylight.yangtools.yang.common.QName;
21 import org.opendaylight.yangtools.yang.common.QNameModule;
22 import org.opendaylight.yangtools.yang.common.Revision;
24 public final class QNameFactory {
25 private static final class StringQName implements Immutable {
26 private final @NonNull String localName;
27 private final @NonNull String namespace;
28 private final @Nullable String revision;
30 StringQName(final String localName, final String namespace, final String revision) {
31 this.localName = requireNonNull(localName);
32 this.namespace = requireNonNull(namespace);
33 this.revision = revision;
37 public int hashCode() {
38 return Objects.hash(localName, namespace, revision);
42 public boolean equals(final Object obj) {
46 if (!(obj instanceof StringQName)) {
49 final StringQName other = (StringQName) obj;
50 return localName.equals(other.localName) && namespace.equals(other.namespace)
51 && Objects.equals(revision, other.revision);
55 return revision != null ? QName.create(namespace, revision, localName) : QName.create(namespace, localName);
59 private static final class ModuleQName implements Immutable {
60 private final @NonNull QNameModule module;
61 private final @NonNull String localName;
63 ModuleQName(final QNameModule module, final String localName) {
64 this.module = requireNonNull(module);
65 this.localName = requireNonNull(localName);
69 public int hashCode() {
70 return 31 * module.hashCode() + localName.hashCode();
74 public boolean equals(final Object obj) {
78 if (!(obj instanceof ModuleQName)) {
81 final ModuleQName other = (ModuleQName) obj;
82 return localName.equals(other.localName) && module.equals(other.module);
86 return QName.create(module, localName);
90 private static final class StringModule implements Immutable {
91 private final @NonNull String namespace;
92 private final @Nullable String revision;
94 StringModule(final String namespace, final String revision) {
95 this.namespace = requireNonNull(namespace);
96 this.revision = revision;
100 public int hashCode() {
101 return 31 * namespace.hashCode() + Objects.hashCode(revision);
105 public boolean equals(final Object obj) {
109 if (!(obj instanceof StringModule)) {
112 final StringModule other = (StringModule) obj;
113 return namespace.equals(other.namespace) && Objects.equals(revision, other.revision);
116 QNameModule toQNameModule() {
117 return QNameModule.create(URI.create(namespace), Revision.ofNullable(revision));
121 private static final int MAX_QNAME_CACHE_SIZE = Integer.getInteger(
122 "org.opendaylight.controller.cluster.datastore.node.utils.qname-cache.max-size", 10000);
123 private static final int MAX_MODULE_CACHE_SIZE = Integer.getInteger(
124 "org.opendaylight.controller.cluster.datastore.node.utils.module-cache.max-size", 2000);
126 private static final LoadingCache<String, QName> LEGACY_CACHE = CacheBuilder.newBuilder()
127 .maximumSize(MAX_QNAME_CACHE_SIZE).weakValues().build(new CacheLoader<String, QName>() {
129 public QName load(final String key) {
130 return QName.create(key).intern();
133 private static final LoadingCache<StringQName, QName> STRING_CACHE = CacheBuilder.newBuilder()
134 .maximumSize(MAX_QNAME_CACHE_SIZE).weakValues().build(new CacheLoader<StringQName, QName>() {
136 public QName load(final StringQName key) {
137 return key.toQName().intern();
140 private static final LoadingCache<ModuleQName, QName> QNAME_CACHE = CacheBuilder.newBuilder()
141 .maximumSize(MAX_QNAME_CACHE_SIZE).weakValues().build(new CacheLoader<ModuleQName, QName>() {
143 public QName load(final ModuleQName key) {
144 return key.toQName().intern();
147 private static final LoadingCache<StringModule, QNameModule> MODULE_CACHE = CacheBuilder.newBuilder()
148 .maximumSize(MAX_MODULE_CACHE_SIZE).weakValues().build(new CacheLoader<StringModule, QNameModule>() {
150 public QNameModule load(final StringModule key) {
151 return key.toQNameModule().intern();
155 private QNameFactory() {
160 public static QName create(final String name) {
161 return LEGACY_CACHE.getUnchecked(name);
164 public static QName create(final String localName, final String namespace, final @Nullable String revision) {
165 return STRING_CACHE.getUnchecked(new StringQName(localName, namespace, revision));
168 public static QName create(final QNameModule module, final String localName) {
169 return QNAME_CACHE.getUnchecked(new ModuleQName(module, localName));
172 public static QNameModule createModule(final String namespace, final @Nullable String revision) {
173 return MODULE_CACHE.getUnchecked(new StringModule(namespace, revision));