/*
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
package com.facebook.common.internal;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* Utility class to create immutable maps.
*
* <p>We do not replicate Guava's ImmutableMap class here. This class merely returns standard
* {@link HashMap}s wrapped so that they throw UnsupportedOperationExceptions on any write method.
*/
public class ImmutableMap {
private ImmutableMap() {}
public static <K, V> Map<K, V> of() {
return Collections.unmodifiableMap(Maps.<K, V>newHashMap());
}
public static <K, V> Map<K, V> of(K k1, V v1) {
Map<K, V> map = Maps.newHashMap();
map.put(k1, v1);
return Collections.unmodifiableMap(map);
}
public static <K, V> Map<K, V> of(K k1, V v1, K k2, V v2) {
Map<K, V> map = Maps.newHashMap();
map.put(k1, v1);
map.put(k2, v2);
return Collections.unmodifiableMap(map);
}
public static <K, V> Map<K, V> of(
K k1, V v1, K k2, V v2, K k3, V v3) {
Map<K, V> map = Maps.newHashMap();
map.put(k1, v1);
map.put(k2, v2);
map.put(k3, v3);
return Collections.unmodifiableMap(map);
}
public static <K, V> Map<K, V> of(
K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4) {
Map<K, V> map = Maps.newHashMap();
map.put(k1, v1);
map.put(k2, v2);
map.put(k3, v3);
map.put(k4, v4);
return Collections.unmodifiableMap(map);
}
public static <K, V> Map<K, V> of(
K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5) {
Map<K, V> map = Maps.newHashMap();
map.put(k1, v1);
map.put(k2, v2);
map.put(k3, v3);
map.put(k4, v4);
map.put(k5, v5);
return Collections.unmodifiableMap(map);
}
// looking for of() with > 5 entries? Use the put method instead
}