2 * Copyright (c) 2018 Pantheon Technologies, s.r.o. 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.yang.common;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.annotations.Beta;
13 import com.google.common.base.MoreObjects;
14 import com.google.common.base.MoreObjects.ToStringHelper;
15 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
16 import java.io.Serializable;
17 import java.util.Objects;
18 import java.util.Optional;
19 import javax.annotation.concurrent.ThreadSafe;
20 import org.eclipse.jdt.annotation.NonNullByDefault;
21 import org.eclipse.jdt.annotation.Nullable;
22 import org.opendaylight.yangtools.concepts.Variant;
25 * A violation of a {@link CanonicalValue} validation. Contains details as mandated by RFC7950 Section 8.3.1.
27 * @author Robert Varga
32 public abstract class CanonicalValueViolation implements Serializable {
33 public static class Regular extends CanonicalValueViolation {
34 private static final long serialVersionUID = 1L;
36 private final @Nullable String appTag;
37 private final @Nullable String message;
39 Regular(final @Nullable String appTag, final @Nullable String message) {
41 this.message = message;
45 @Nullable String appTag() {
50 @Nullable String message() {
55 ToStringHelper addToString(final ToStringHelper helper) {
56 return helper.omitNullValues().add("app-tag", appTag).add("message", message);
60 @SuppressFBWarnings("NM_CLASS_NOT_EXCEPTION")
61 public static class WithException extends CanonicalValueViolation {
62 private static final long serialVersionUID = 1L;
64 private final Exception cause;
66 WithException(final Exception cause) {
67 this.cause = requireNonNull(cause);
71 @SuppressFBWarnings("NP_NONNULL_RETURN_VIOLATION")
72 @Nullable String appTag() {
77 @Nullable String message() {
78 return cause.getMessage();
81 public final Exception getCause() {
86 ToStringHelper addToString(final ToStringHelper helper) {
87 return helper.add("cause", cause);
91 private static final CanonicalValueViolation EMPTY = new Regular(null, null);
92 private static final Variant<?, CanonicalValueViolation> EMPTY_VARIANT = Variant.ofSecond(EMPTY);
93 private static final long serialVersionUID = 1L;
95 public static CanonicalValueViolation empty() {
99 public static CanonicalValueViolation of(final Exception cause) {
100 return new WithException(cause);
103 public static CanonicalValueViolation of(final @Nullable String appTag, final @Nullable String message) {
104 return appTag == null && message == null ? EMPTY : new Regular(appTag, message);
107 @SuppressWarnings("unchecked")
108 public static <T> Variant<T, CanonicalValueViolation> emptyVariant() {
109 return (Variant<T, CanonicalValueViolation>) EMPTY_VARIANT;
112 public static <T> Variant<T, CanonicalValueViolation> variantOf(final Exception cause) {
113 return Variant.ofSecond(CanonicalValueViolation.of(cause));
116 public static <T> Variant<T, CanonicalValueViolation> variantOf(final String message) {
117 return variantOf(null, message);
120 public static <T> Variant<T, CanonicalValueViolation> variantOf(final @Nullable String appTag,
121 final String message) {
122 return Variant.ofSecond(CanonicalValueViolation.of(appTag, message));
125 public final Optional<String> getAppTag() {
126 return nullableString(appTag());
129 public final Optional<String> getMessage() {
130 return nullableString(appTag());
133 abstract @Nullable String appTag();
135 abstract @Nullable String message();
138 public final int hashCode() {
139 return Objects.hash(appTag(), message());
143 public final boolean equals(final @Nullable Object obj) {
147 if (!(obj instanceof CanonicalValueViolation)) {
150 final CanonicalValueViolation other = (CanonicalValueViolation) obj;
151 return Objects.equals(appTag(), other.appTag()) && Objects.equals(message(), other.message());
155 public final String toString() {
156 return addToString(MoreObjects.toStringHelper(this)).toString();
159 abstract ToStringHelper addToString(ToStringHelper helper);
161 private static Optional<String> nullableString(@Nullable final String str) {
162 return str != null ? Optional.of(str) : Optional.empty();