/
FixedSizeMapFactoryImpl.java
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/
FixedSizeMapFactoryImpl.java
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/*
* 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.map.fixed;
import org.eclipse.collections.api.factory.map.FixedSizeMapFactory;
import org.eclipse.collections.api.map.FixedSizeMap;
import org.eclipse.collections.impl.block.factory.Comparators;
public class FixedSizeMapFactoryImpl implements FixedSizeMapFactory
{
private static final FixedSizeMap<?, ?> EMPTY_MAP = new EmptyMap<>();
@Override
public <K, V> FixedSizeMap<K, V> empty()
{
return (FixedSizeMap<K, V>) EMPTY_MAP;
}
@Override
public <K, V> FixedSizeMap<K, V> of()
{
return this.empty();
}
@Override
public <K, V> FixedSizeMap<K, V> with()
{
return this.empty();
}
@Override
public <K, V> FixedSizeMap<K, V> of(K key, V value)
{
return this.with(key, value);
}
@Override
public <K, V> FixedSizeMap<K, V> with(K key, V value)
{
return new SingletonMap<>(key, value);
}
@Override
public <K, V> FixedSizeMap<K, V> of(K key1, V value1, K key2, V value2)
{
return this.with(key1, value1, key2, value2);
}
@Override
public <K, V> FixedSizeMap<K, V> with(K key1, V value1, K key2, V value2)
{
if (Comparators.nullSafeEquals(key1, key2))
{
return this.of(key1, value2);
}
return new DoubletonMap<>(key1, value1, key2, value2);
}
@Override
public <K, V> FixedSizeMap<K, V> of(K key1, V value1, K key2, V value2, K key3, V value3)
{
return this.with(key1, value1, key2, value2, key3, value3);
}
@Override
public <K, V> FixedSizeMap<K, V> with(K key1, V value1, K key2, V value2, K key3, V value3)
{
if (Comparators.nullSafeEquals(key1, key2) && Comparators.nullSafeEquals(key2, key3))
{
return this.of(key1, value3);
}
if (Comparators.nullSafeEquals(key1, key2))
{
return this.of(key1, value2, key3, value3);
}
if (Comparators.nullSafeEquals(key1, key3))
{
return this.of(key2, value2, key1, value3);
}
if (Comparators.nullSafeEquals(key2, key3))
{
return this.of(key1, value1, key2, value3);
}
return new TripletonMap<>(key1, value1, key2, value2, key3, value3);
}
}