-
Notifications
You must be signed in to change notification settings - Fork 581
/
HashBagWithHashingStrategy.java
149 lines (127 loc) · 5.01 KB
/
HashBagWithHashingStrategy.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
/*
* Copyright (c) 2021 Bhavana Hindupur.
* 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.bag.strategy.mutable;
import java.io.Serializable;
import org.eclipse.collections.api.bag.Bag;
import org.eclipse.collections.api.bag.MutableBag;
import org.eclipse.collections.api.block.HashingStrategy;
import org.eclipse.collections.api.block.predicate.primitive.IntPredicate;
import org.eclipse.collections.api.factory.primitive.ObjectIntHashingStrategyMaps;
import org.eclipse.collections.api.map.primitive.MutableObjectIntMap;
import org.eclipse.collections.impl.bag.mutable.AbstractHashBag;
import org.eclipse.collections.impl.utility.ArrayIterate;
import org.eclipse.collections.impl.utility.Iterate;
public class HashBagWithHashingStrategy<T>
extends AbstractHashBag<T>
implements Serializable
{
private static final long serialVersionUID = 1L;
private final HashingStrategy<? super T> hashingStrategy;
public HashBagWithHashingStrategy(HashingStrategy<? super T> hashingStrategy)
{
if (hashingStrategy == null)
{
throw new IllegalArgumentException("Cannot Instantiate HashBagWithHashingStrategy with null HashingStrategy");
}
this.hashingStrategy = hashingStrategy;
this.items = ObjectIntHashingStrategyMaps.mutable.with(hashingStrategy);
}
public HashBagWithHashingStrategy(HashingStrategy<? super T> hashingStrategy, int size)
{
if (hashingStrategy == null)
{
throw new IllegalArgumentException("Cannot Instantiate HashBagWithHashingStrategy with null HashingStrategy");
}
this.hashingStrategy = hashingStrategy;
this.items = ObjectIntHashingStrategyMaps.mutable.withInitialCapacity(hashingStrategy, size);
}
private HashBagWithHashingStrategy(HashingStrategy<? super T> hashingStrategy, MutableObjectIntMap<T> map)
{
this.hashingStrategy = hashingStrategy;
this.items = map;
this.size = (int) map.sum();
}
public static <E> HashBagWithHashingStrategy<E> newBag(HashingStrategy<? super E> hashingStrategy)
{
return new HashBagWithHashingStrategy<>(hashingStrategy);
}
public static <E> HashBagWithHashingStrategy<E> newBag(HashingStrategy<? super E> hashingStrategy, int size)
{
return new HashBagWithHashingStrategy<>(hashingStrategy, size);
}
public static <E> HashBagWithHashingStrategy<E> newBag(HashingStrategy<? super E> hashingStrategy, Bag<? extends E> source)
{
HashBagWithHashingStrategy<E> result = HashBagWithHashingStrategy.newBag(hashingStrategy, source.sizeDistinct());
result.addAllBag(source);
return result;
}
public static <E> HashBagWithHashingStrategy<E> newBag(HashingStrategy<? super E> hashingStrategy, Iterable<? extends E> source)
{
if (source instanceof Bag)
{
return HashBagWithHashingStrategy.newBag(hashingStrategy, (Bag<E>) source);
}
return HashBagWithHashingStrategy.newBagWith(hashingStrategy, (E[]) Iterate.toArray(source));
}
public static <E> HashBagWithHashingStrategy<E> newBagWith(HashingStrategy<? super E> hashingStrategy, E... elements)
{
HashBagWithHashingStrategy<E> result = HashBagWithHashingStrategy.newBag(hashingStrategy);
ArrayIterate.addAllTo(elements, result);
return result;
}
public HashingStrategy<? super T> hashingStrategy()
{
return this.hashingStrategy;
}
@Override
protected int computeHashCode(T item)
{
return this.hashingStrategy.computeHashCode(item);
}
@Override
public MutableBag<T> selectByOccurrences(IntPredicate predicate)
{
MutableObjectIntMap<T> map = this.items.select((each, occurrences) -> predicate.accept(occurrences));
return new HashBagWithHashingStrategy<>(this.hashingStrategy, map);
}
protected Object writeReplace()
{
return new HashBagWithHashingStrategySerializationProxy<>(this);
}
@Override
public MutableBag<T> with(T element)
{
this.add(element);
return this;
}
@Override
public MutableBag<T> without(T element)
{
this.remove(element);
return this;
}
@Override
public MutableBag<T> withAll(Iterable<? extends T> elements)
{
this.addAllIterable(elements);
return this;
}
@Override
public MutableBag<T> withoutAll(Iterable<? extends T> elements)
{
this.removeAllIterable(elements);
return this;
}
@Override
public MutableBag<T> newEmpty()
{
return HashBagWithHashingStrategy.newBag(this.hashingStrategy);
}
}