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A general programming library in Java/Android. It's easy to learn and simple to use with concise and powerful APIs.
/*
* Copyright (C) 2016 HaiYang Li
*
* 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.landawn.abacus.util;
import java.util.AbstractMap;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.function.BiFunction;
import java.util.function.Function;
/**
*
* @author Haiyang Li
* @param the key type
* @param the value type
* @since 0.8
*/
@com.landawn.abacus.annotation.Immutable
public class ImmutableMap extends AbstractMap implements Immutable {
@SuppressWarnings("rawtypes")
private static final ImmutableMap EMPTY = new ImmutableMap(Collections.EMPTY_MAP);
private final Map map;
ImmutableMap(final Map map) {
this.map = Collections.unmodifiableMap(map);
}
/**
*
* @param the key type
* @param the value type
* @return
*/
public static ImmutableMap empty() {
return EMPTY;
}
/**
*
* @param the key type
* @param the value type
* @param
* @param
* @param k1
* @param v1
* @return
*/
public static ImmutableMap of(final K k1, final V v1) {
return new ImmutableMap<>(Collections.singletonMap(k1, v1));
}
/**
*
* @param the key type
* @param the value type
* @param
* @param
* @param k1
* @param v1
* @param k2
* @param v2
* @return
*/
public static ImmutableMap of(final K k1, final V v1, final K k2, final V v2) {
final Map map = N.asLinkedHashMap(k1, v1, k2, v2);
return new ImmutableMap<>(map);
}
/**
*
* @param the key type
* @param the value type
* @param
* @param
* @param k1
* @param v1
* @param k2
* @param v2
* @param k3
* @param v3
* @return
*/
public static ImmutableMap of(final K k1, final V v1, final K k2, final V v2, final K k3, final V v3) {
final Map map = N.asLinkedHashMap(k1, v1, k2, v2, k3, v3);
return new ImmutableMap<>(map);
}
/**
*
* @param the key type
* @param the value type
* @param
* @param
* @param k1
* @param v1
* @param k2
* @param v2
* @param k3
* @param v3
* @param k4
* @param v4
* @return
*/
public static ImmutableMap of(final K k1, final V v1, final K k2, final V v2, final K k3, final V v3, final K k4, final V v4) {
final Map map = N.asLinkedHashMap(k1, v1, k2, v2, k3, v3, k4, v4);
return new ImmutableMap<>(map);
}
/**
*
* @param the key type
* @param the value type
* @param
* @param
* @param k1
* @param v1
* @param k2
* @param v2
* @param k3
* @param v3
* @param k4
* @param v4
* @param k5
* @param v5
* @return
*/
public static ImmutableMap of(final K k1, final V v1, final K k2, final V v2, final K k3, final V v3, final K k4, final V v4, final K k5,
final V v5) {
final Map map = N.asLinkedHashMap(k1, v1, k2, v2, k3, v3, k4, v4, k5, v5);
return new ImmutableMap<>(map);
}
/**
*
* @param the key type
* @param the value type
* @param
* @param
* @param k1
* @param v1
* @param k2
* @param v2
* @param k3
* @param v3
* @param k4
* @param v4
* @param k5
* @param v5
* @param k6
* @param v6
* @return
*/
public static ImmutableMap of(final K k1, final V v1, final K k2, final V v2, final K k3, final V v3, final K k4, final V v4, final K k5,
final V v5, final K k6, final V v6) {
final Map map = N.asLinkedHashMap(k1, v1, k2, v2, k3, v3, k4, v4, k5, v5, k6, v6);
return new ImmutableMap<>(map);
}
/**
*
* @param the key type
* @param the value type
* @param
* @param
* @param k1
* @param v1
* @param k2
* @param v2
* @param k3
* @param v3
* @param k4
* @param v4
* @param k5
* @param v5
* @param k6
* @param v6
* @param k7
* @param v7
* @return
*/
public static ImmutableMap of(final K k1, final V v1, final K k2, final V v2, final K k3, final V v3, final K k4, final V v4, final K k5,
final V v5, final K k6, final V v6, final K k7, final V v7) {
final Map map = N.asLinkedHashMap(k1, v1, k2, v2, k3, v3, k4, v4, k5, v5, k6, v6, k7, v7);
return new ImmutableMap<>(map);
}
/**
*
* @param the key type
* @param the value type
* @param map the elements in this map are shared by the returned ImmutableMap.
* @return
*/
public static ImmutableMap of(final Map map) {
if (map == null) {
return empty();
} else if (map instanceof ImmutableMap) {
return (ImmutableMap) map;
}
return new ImmutableMap<>(map);
}
/**
*
* @param the key type
* @param the value type
* @param map
* @return
*/
public static ImmutableMap copyOf(final Map map) {
if (N.isNullOrEmpty(map)) {
return empty();
}
final Map tmp = map instanceof IdentityHashMap ? new IdentityHashMap<>(map)
: ((map instanceof LinkedHashMap || map instanceof SortedMap) ? new LinkedHashMap<>(map) : new HashMap<>(map));
return new ImmutableMap<>(tmp);
}
/**
* Gets the or default.
*
* @param key
* @param defaultValue
* @return
*/
@Override
public V getOrDefault(Object key, V defaultValue) {
final V val = get(key);
return val == null && !containsKey(key) ? defaultValue : val;
}
/**
*
* @param k
* @param v
* @return
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final V put(K k, V v) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
*
* @param o
* @return
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final V remove(Object o) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
*
* @param map
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final void putAll(Map map) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* Put if absent.
*
* @param key
* @param value
* @return
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final V putIfAbsent(K key, V value) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
*
* @param key
* @param value
* @return
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final boolean remove(Object key, Object value) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
*
* @param key
* @param oldValue
* @param newValue
* @return
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final boolean replace(K key, V oldValue, V newValue) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
*
* @param key
* @param value
* @return
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final V replace(K key, V value) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* Compute if absent.
*
* @param key
* @param mappingFunction
* @return
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final V computeIfAbsent(K key, Function mappingFunction) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* Compute if present.
*
* @param key
* @param remappingFunction
* @return
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final V computeIfPresent(K key, BiFunction remappingFunction) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
*
* @param key
* @param remappingFunction
* @return
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final V compute(K key, BiFunction remappingFunction) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
*
* @param key
* @param value
* @param remappingFunction
* @return
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final V merge(K key, V value, BiFunction remappingFunction) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
*
* @deprecated throws {@code UnsupportedOperationException}
* @throws UnsupportedOperationException
*/
@Deprecated
@Override
public final void clear() throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* Checks if is empty.
*
* @return true, if is empty
*/
@Override
public boolean isEmpty() {
return map.isEmpty();
}
/**
*
* @param key
* @return
*/
@Override
public boolean containsKey(Object key) {
return map.containsKey(key);
}
/**
*
* @param value
* @return
*/
@Override
public boolean containsValue(Object value) {
return map.containsValue(value);
}
/**
*
* @param key
* @return
*/
@Override
public V get(Object key) {
return map.get(key);
}
@Override
public Set keySet() {
return map.keySet();
}
@Override
public Collection values() {
return map.values();
}
@Override
public Set> entrySet() {
return map.entrySet();
}
@Override
public int size() {
return map.size();
}
public static Builder builder() {
return new Builder<>();
}
public static Builder builder(final Map backedMap) {
N.checkArgNotNull(backedMap);
return new Builder<>(backedMap);
}
public static class Builder {
private final Map map;
Builder() {
map = new HashMap<>();
}
Builder(final Map backedMap) {
map = backedMap;
}
public Builder put(final K key, final V value) {
map.put(key, value);
return this;
}
public Builder putAll(final Map m) {
map.putAll(m);
return this;
}
public ImmutableMap build() {
return ImmutableMap.of(map);
}
}
}