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/*
* Copyright (C) 2008 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.collect.testing;
import com.google.common.annotations.GwtCompatible;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import org.checkerframework.checker.nullness.qual.Nullable;
/**
* A container class for the five sample elements we need for testing.
*
* @author Kevin Bourrillion
*/
@GwtCompatible
public class SampleElements<E> implements Iterable<E> {
// TODO: rename e3, e4 => missing1, missing2
private final E e0;
private final E e1;
private final E e2;
private final E e3;
private final E e4;
public SampleElements(E e0, E e1, E e2, E e3, E e4) {
this.e0 = e0;
this.e1 = e1;
this.e2 = e2;
this.e3 = e3;
this.e4 = e4;
}
@Override
public Iterator<E> iterator() {
return asList().iterator();
}
public List<E> asList() {
return Arrays.asList(e0(), e1(), e2(), e3(), e4());
}
public static class Strings extends SampleElements<String> {
public Strings() {
// elements aren't sorted, to better test SortedSet iteration ordering
super("b", "a", "c", "d", "e");
}
// for testing SortedSet and SortedMap methods
public static final String BEFORE_FIRST = "\0";
public static final String BEFORE_FIRST_2 = "\0\0";
public static final String MIN_ELEMENT = "a";
public static final String AFTER_LAST = "z";
public static final String AFTER_LAST_2 = "zz";
}
public static class Chars extends SampleElements<Character> {
public Chars() {
// elements aren't sorted, to better test SortedSet iteration ordering
super('b', 'a', 'c', 'd', 'e');
}
}
public static class Enums extends SampleElements<AnEnum> {
public Enums() {
// elements aren't sorted, to better test SortedSet iteration ordering
super(AnEnum.B, AnEnum.A, AnEnum.C, AnEnum.D, AnEnum.E);
}
}
public static class Ints extends SampleElements<Integer> {
public Ints() {
// elements aren't sorted, to better test SortedSet iteration ordering
super(1, 0, 2, 3, 4);
}
}
public static <K, V> SampleElements<Entry<K, V>> mapEntries(
SampleElements<K> keys, SampleElements<V> values) {
return new SampleElements<>(
Helpers.mapEntry(keys.e0(), values.e0()),
Helpers.mapEntry(keys.e1(), values.e1()),
Helpers.mapEntry(keys.e2(), values.e2()),
Helpers.mapEntry(keys.e3(), values.e3()),
Helpers.mapEntry(keys.e4(), values.e4()));
}
public E e0() {
return e0;
}
public E e1() {
return e1;
}
public E e2() {
return e2;
}
public E e3() {
return e3;
}
public E e4() {
return e4;
}
public static class Unhashables extends SampleElements<UnhashableObject> {
public Unhashables() {
super(
new UnhashableObject(1),
new UnhashableObject(2),
new UnhashableObject(3),
new UnhashableObject(4),
new UnhashableObject(5));
}
}
public static class Colliders extends SampleElements<Object> {
public Colliders() {
super(new Collider(1), new Collider(2), new Collider(3), new Collider(4), new Collider(5));
}
}
private static class Collider {
final int value;
Collider(int value) {
this.value = value;
}
@Override
public boolean equals(@Nullable Object obj) {
return obj instanceof Collider && ((Collider) obj).value == value;
}
@Override
public int hashCode() {
return 1; // evil!
}
}
}
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