io.atomix.core.multiset.impl.TranscodingAsyncDistributedMultiset.java Source code

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Here is the source code for io.atomix.core.multiset.impl.TranscodingAsyncDistributedMultiset.java

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/*
 * Copyright 2018-present Open Networking Foundation
 *
 * 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 io.atomix.core.multiset.impl;

import com.google.common.collect.Multiset;
import com.google.common.collect.Multisets;
import io.atomix.core.collection.impl.TranscodingAsyncDistributedCollection;
import io.atomix.core.multiset.AsyncDistributedMultiset;
import io.atomix.core.multiset.DistributedMultiset;
import io.atomix.core.set.AsyncDistributedSet;
import io.atomix.core.set.impl.TranscodingAsyncDistributedSet;

import java.time.Duration;
import java.util.concurrent.CompletableFuture;
import java.util.function.Function;

/**
 * Transcoding multiset.
 */
public class TranscodingAsyncDistributedMultiset<E1, E2> extends TranscodingAsyncDistributedCollection<E1, E2>
        implements AsyncDistributedMultiset<E1> {
    private final AsyncDistributedMultiset<E2> backingMultiset;
    private final Function<E1, E2> elementEncoder;
    private final Function<E2, E1> elementDecoder;

    public TranscodingAsyncDistributedMultiset(AsyncDistributedMultiset<E2> backingMultiset,
            Function<E1, E2> elementEncoder, Function<E2, E1> elementDecoder) {
        super(backingMultiset, elementEncoder, elementDecoder);
        this.backingMultiset = backingMultiset;
        this.elementEncoder = k -> k == null ? null : elementEncoder.apply(k);
        this.elementDecoder = k -> k == null ? null : elementDecoder.apply(k);
    }

    @Override
    public CompletableFuture<Integer> count(Object element) {
        return backingMultiset.count(elementEncoder.apply((E1) element));
    }

    @Override
    public CompletableFuture<Integer> add(E1 element, int occurrences) {
        return backingMultiset.add(elementEncoder.apply(element), occurrences);
    }

    @Override
    public CompletableFuture<Integer> remove(Object element, int occurrences) {
        return backingMultiset.remove(elementEncoder.apply((E1) element), occurrences);
    }

    @Override
    public CompletableFuture<Integer> setCount(E1 element, int count) {
        return backingMultiset.setCount(elementEncoder.apply(element), count);
    }

    @Override
    public CompletableFuture<Boolean> setCount(E1 element, int oldCount, int newCount) {
        return backingMultiset.setCount(elementEncoder.apply(element), oldCount, newCount);
    }

    @Override
    public AsyncDistributedSet<E1> elementSet() {
        return new TranscodingAsyncDistributedSet<>(backingMultiset.elementSet(), elementEncoder, elementDecoder);
    }

    @Override
    public AsyncDistributedSet<Multiset.Entry<E1>> entrySet() {
        Function<Multiset.Entry<E1>, Multiset.Entry<E2>> entryEncoder = entry -> Multisets
                .immutableEntry(elementEncoder.apply(entry.getElement()), entry.getCount());
        Function<Multiset.Entry<E2>, Multiset.Entry<E1>> entryDecoder = entry -> Multisets
                .immutableEntry(elementDecoder.apply(entry.getElement()), entry.getCount());
        return new TranscodingAsyncDistributedSet<>(backingMultiset.entrySet(), entryEncoder, entryDecoder);
    }

    @Override
    public DistributedMultiset<E1> sync(Duration operationTimeout) {
        return new BlockingDistributedMultiset<>(this, operationTimeout.toMillis());
    }
}