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 org.junit.Assert.assertEquals;
11 import static org.junit.Assert.assertSame;
13 import org.eclipse.jdt.annotation.NonNullByDefault;
14 import org.eclipse.jdt.annotation.Nullable;
15 import org.junit.Test;
16 import org.opendaylight.yangtools.concepts.Variant;
19 public class DerivedStringTest {
20 public static class EagerDerivedString extends CachingDerivedString<EagerDerivedString> {
21 private static final long serialVersionUID = 1L;
23 protected EagerDerivedString(final String str) {
28 @SuppressWarnings("checkstyle:parameterName")
29 public final int compareTo(final EagerDerivedString o) {
30 return toCanonicalString().compareTo(o.toCanonicalString());
34 public final CanonicalValueSupport<EagerDerivedString> support() {
39 public final int hashCode() {
40 return toCanonicalString().hashCode();
44 public final boolean equals(@Nullable final Object obj) {
48 if (obj instanceof String) {
49 return toCanonicalString().equals(obj);
52 return obj instanceof DerivedString
53 && toCanonicalString().equals(((DerivedString<?>)obj).toCanonicalString());
57 protected final String computeCanonicalString() {
58 throw new UnsupportedOperationException();
62 public static class LazyDerivedString extends CachingDerivedString<LazyDerivedString> {
63 private static final long serialVersionUID = 1L;
65 private final String str;
67 protected LazyDerivedString(final String str) {
72 @SuppressWarnings("checkstyle:parameterName")
73 public final int compareTo(final LazyDerivedString o) {
74 return str.compareTo(o.str);
78 public final CanonicalValueSupport<LazyDerivedString> support() {
83 public final int hashCode() {
84 return str.hashCode();
88 public final boolean equals(@Nullable final Object obj) {
92 if (obj instanceof String) {
93 return str.equals(obj);
96 return obj instanceof DerivedString && str.equals(((DerivedString<?>)obj).toCanonicalString());
100 protected final String computeCanonicalString() {
105 public static final class EagerDerivedStringSupport extends AbstractCanonicalValueSupport<EagerDerivedString> {
106 EagerDerivedStringSupport() {
107 super(EagerDerivedString.class);
111 public Variant<EagerDerivedString, CanonicalValueViolation> fromString(final String str) {
112 return Variant.ofFirst(new EagerDerivedString(str));
116 public static final class LazyDerivedStringSupport extends AbstractCanonicalValueSupport<LazyDerivedString> {
117 LazyDerivedStringSupport() {
118 super(LazyDerivedString.class);
122 public Variant<LazyDerivedString, CanonicalValueViolation> fromString(final String str) {
123 return Variant.ofFirst(new LazyDerivedString(str));
127 private static final CanonicalValueSupport<EagerDerivedString> EAGER_SUPPORT = new EagerDerivedStringSupport();
128 private static final CanonicalValueSupport<LazyDerivedString> LAZY_SUPPORT = new LazyDerivedStringSupport();
131 public void testEager() {
132 final DerivedString<?> foo = new EagerDerivedString("foo");
133 assertSame("foo", foo.toString());
137 public void testLazy() {
138 final DerivedString<?> foo = new LazyDerivedString("foo");
139 final String first = foo.toString();
140 assertEquals("foo", first);
141 assertSame(first, foo.toString());