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.controller.cluster.access.concepts;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static com.google.common.base.Verify.verifyNotNull;
12 import static java.util.Objects.requireNonNull;
14 import com.google.common.base.MoreObjects;
15 import com.google.common.base.Strings;
16 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
17 import java.io.DataInput;
18 import java.io.DataOutput;
19 import java.io.IOException;
20 import java.nio.charset.StandardCharsets;
21 import java.util.regex.Pattern;
22 import org.eclipse.jdt.annotation.NonNull;
23 import org.opendaylight.yangtools.concepts.Identifier;
24 import org.opendaylight.yangtools.concepts.WritableIdentifier;
27 * An {@link Identifier} identifying a data store frontend type, which is able to access the data store backend.
28 * Frontend implementations need to define this identifier so that multiple clients existing on a member node can be
31 public final class FrontendType implements Comparable<FrontendType>, WritableIdentifier {
33 private static final long serialVersionUID = 1L;
34 private static final String SIMPLE_STRING_REGEX = "^[a-zA-Z0-9-_.*+:=,!~';]+$";
35 private static final Pattern SIMPLE_STRING_PATTERN = Pattern.compile(SIMPLE_STRING_REGEX);
37 private final @NonNull String name;
39 @SuppressFBWarnings(value = "VO_VOLATILE_REFERENCE_TO_ARRAY",
40 justification = "The array elements are non-volatile but we don't access them.")
41 private volatile byte[] serialized;
43 private FrontendType(final String name) {
44 this.name = requireNonNull(name);
47 FrontendType(final String name, final byte[] serialized) {
49 this.serialized = verifyNotNull(serialized);
53 * Return a {@link FrontendType} corresponding to a string representation. Input string has constraints
54 * on what characters it can contain. It may contain the following:
55 * - US-ASCII letters and numbers
56 * - special characters: -_.*+:=,!~';
58 * @param name the input name
59 * @return A {@link FrontendType} instance
60 * @throws IllegalArgumentException if the string is null, empty or contains invalid characters
62 public static @NonNull FrontendType forName(final String name) {
63 checkArgument(!Strings.isNullOrEmpty(name));
64 checkArgument(SIMPLE_STRING_PATTERN.matcher(name).matches(),
65 "Supplied name %s does not patch pattern %s", name, SIMPLE_STRING_REGEX);
66 return new FrontendType(name);
69 public static @NonNull FrontendType readFrom(final DataInput in) throws IOException {
70 final byte[] serialized = new byte[in.readInt()];
71 in.readFully(serialized);
72 return new FrontendType(new String(serialized, StandardCharsets.UTF_8));
76 public void writeTo(final DataOutput out) throws IOException {
77 final byte[] local = getSerialized();
78 out.writeInt(local.length);
82 public @NonNull String getName() {
86 public org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.cds.types.rev191024
87 . @NonNull FrontendType toYang() {
88 return new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.cds.types.rev191024
93 public int hashCode() {
94 return name.hashCode();
98 public boolean equals(final Object obj) {
99 return this == obj || obj instanceof FrontendType && name.equals(((FrontendType)obj).name);
103 public int compareTo(final FrontendType obj) {
104 return this == obj ? 0 : name.compareTo(obj.name);
108 public String toString() {
109 return MoreObjects.toStringHelper(FrontendType.class).add("name", name).toString();
112 private byte[] getSerialized() {
113 byte[] local = serialized;
115 local = name.getBytes(StandardCharsets.UTF_8);
122 private Object writeReplace() {
123 return new FT(getSerialized());