IgniteCache as Map viewer

IgniteCacheMapView.java

package pl.cee.util;

import org.apache.ignite.IgniteCache;
import org.jetbrains.annotations.NotNull;

import java.util.Collection;
import java.util.Map;
import java.util.Set;

/*
    The MIT License

    Copyright (c) 2017 180254

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    THE SOFTWARE.
 */
public class IgniteCacheMapView<K, V> implements Map<K, V> {

    private final IgniteCache<K, V> cache;

    public IgniteCacheMapView(IgniteCache<K, V> cache) {
        this.cache = cache;
    }

    @Override
    public int size() {
        return cache.size();
    }

    @Override
    public boolean isEmpty() {
        return cache.size() == 0;
    }

    @Override
    @SuppressWarnings("unchecked")
    public boolean containsKey(Object key) {
        return cache.containsKey((K) key);
    }

    @Override
    public boolean containsValue(Object value) {
        throw new UnsupportedOperationException();
    }

    @Override
    @SuppressWarnings("unchecked")
    public V get(Object key) {
        return cache.get((K) key);
    }

    @Override
    @SuppressWarnings("unchecked")
    public V put(Object key, Object value) {
        return cache.getAndPut((K) key, (V) value);
    }

    @Override
    @SuppressWarnings("unchecked")
    public V remove(Object key) {
        return cache.getAndRemove((K) key);
    }

    @Override
    public void putAll(@NotNull Map<? extends K, ? extends V> m) {
        m.forEach(cache::put);
    }

    @Override
    public void clear() {
        cache.clear();
    }

    @NotNull
    @Override
    public Set<K> keySet() {
        throw new UnsupportedOperationException();
    }

    @NotNull
    @Override
    public Collection<V> values() {
        throw new UnsupportedOperationException();
    }

    @NotNull
    @Override
    public Set<Entry<K, V>> entrySet() {
        throw new UnsupportedOperationException();
    }
}