/
ImmutableQuadrupletonSet.java
executable file
·202 lines (181 loc) · 5.69 KB
/
ImmutableQuadrupletonSet.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/*
* Copyright (c) 2016 Goldman Sachs.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompany this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.eclipse.collections.impl.set.immutable;
import java.io.Serializable;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Set;
import net.jcip.annotations.Immutable;
import org.eclipse.collections.api.block.procedure.Procedure;
import org.eclipse.collections.api.block.procedure.Procedure2;
import org.eclipse.collections.api.block.procedure.primitive.ObjectIntProcedure;
import org.eclipse.collections.api.set.ImmutableSet;
import org.eclipse.collections.impl.block.factory.Comparators;
import org.eclipse.collections.impl.factory.Sets;
@Immutable
final class ImmutableQuadrupletonSet<T>
extends AbstractImmutableSet<T>
implements Serializable
{
private static final long serialVersionUID = 1L;
private final T element1;
private final T element2;
private final T element3;
private final T element4;
ImmutableQuadrupletonSet(T obj1, T obj2, T obj3, T obj4)
{
this.element1 = obj1;
this.element2 = obj2;
this.element3 = obj3;
this.element4 = obj4;
}
@Override
public int size()
{
return 4;
}
@Override
public boolean equals(Object other)
{
if (other == this)
{
return true;
}
if (!(other instanceof Set))
{
return false;
}
Set<?> set = (Set<?>) other;
return set.size() == this.size()
&& set.contains(this.element1)
&& set.contains(this.element2)
&& set.contains(this.element3)
&& set.contains(this.element4);
}
@Override
public int hashCode()
{
return this.nullSafeHashCode(this.element1)
+ this.nullSafeHashCode(this.element2)
+ this.nullSafeHashCode(this.element3)
+ this.nullSafeHashCode(this.element4);
}
@Override
public ImmutableSet<T> newWith(T element)
{
if (!this.contains(element))
{
return Sets.immutable.with(this.element1, this.element2, this.element3, this.element4, element);
}
return this;
}
@Override
public ImmutableSet<T> newWithout(T element)
{
if (this.contains(element))
{
if (Comparators.nullSafeEquals(element, this.element1))
{
return Sets.immutable.with(this.element2, this.element3, this.element4);
}
if (Comparators.nullSafeEquals(element, this.element2))
{
return Sets.immutable.with(this.element1, this.element3, this.element4);
}
if (Comparators.nullSafeEquals(element, this.element3))
{
return Sets.immutable.with(this.element1, this.element2, this.element4);
}
return Sets.immutable.with(this.element1, this.element2, this.element3);
}
return this;
}
@Override
public boolean contains(Object obj)
{
return Comparators.nullSafeEquals(obj, this.element1)
|| Comparators.nullSafeEquals(obj, this.element2)
|| Comparators.nullSafeEquals(obj, this.element3)
|| Comparators.nullSafeEquals(obj, this.element4);
}
@Override
public Iterator<T> iterator()
{
return new QuadrupletonSetIterator();
}
@Override
public T getFirst()
{
return this.element1;
}
@Override
public T getLast()
{
return this.element4;
}
@Override
public T getOnly()
{
throw new IllegalStateException("Size must be 1 but was " + this.size());
}
@Override
public void each(Procedure<? super T> procedure)
{
procedure.value(this.element1);
procedure.value(this.element2);
procedure.value(this.element3);
procedure.value(this.element4);
}
@Override
public void forEachWithIndex(ObjectIntProcedure<? super T> objectIntProcedure)
{
objectIntProcedure.value(this.element1, 0);
objectIntProcedure.value(this.element2, 1);
objectIntProcedure.value(this.element3, 2);
objectIntProcedure.value(this.element4, 3);
}
@Override
public <P> void forEachWith(Procedure2<? super T, ? super P> procedure, P parameter)
{
procedure.value(this.element1, parameter);
procedure.value(this.element2, parameter);
procedure.value(this.element3, parameter);
procedure.value(this.element4, parameter);
}
protected class QuadrupletonSetIterator
extends ImmutableSetIterator
{
@Override
protected T getElement(int i)
{
if (i == 0)
{
return ImmutableQuadrupletonSet.this.element1;
}
if (i == 1)
{
return ImmutableQuadrupletonSet.this.element2;
}
if (i == 2)
{
return ImmutableQuadrupletonSet.this.element3;
}
if (i == 3)
{
return ImmutableQuadrupletonSet.this.element4;
}
throw new NoSuchElementException("i=" + i);
}
}
private Object writeReplace()
{
return new ImmutableSetSerializationProxy<>(this);
}
}