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Bucket4j integration with Hazelcast 3.x branch

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/*-
 * ========================LICENSE_START=================================
 * Bucket4j
 * %%
 * Copyright (C) 2015 - 2020 Vladimir Bukhtoyarov
 * %%
 * 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.
 * =========================LICENSE_END==================================
 */
package io.github.bucket4j.grid.hazelcast;

import com.hazelcast.map.EntryBackupProcessor;
import com.hazelcast.map.EntryProcessor;
import io.github.bucket4j.grid.CommandResult;
import io.github.bucket4j.grid.GridBucketState;
import io.github.bucket4j.grid.jcache.JCacheEntryProcessor;

import java.io.Serializable;
import java.util.Map;


class HazelcastEntryProcessorAdapter implements EntryProcessor {

    private static final long serialVersionUID = 1L;

    private final JCacheEntryProcessor entryProcessor;
    private EntryBackupProcessor backupProcessor;

    public HazelcastEntryProcessorAdapter(JCacheEntryProcessor entryProcessor) {
        this.entryProcessor = entryProcessor;
    }

    @Override
    public Object process(Map.Entry entry) {
        HazelcastMutableEntryAdapter entryAdapter = new HazelcastMutableEntryAdapter<>(entry);
        CommandResult result = entryProcessor.process(entryAdapter);
        if (entryAdapter.isModified()) {
            GridBucketState state = entry.getValue();
            backupProcessor = new SimpleBackupProcessor<>(state);
        }
        return result;
    }

    @Override
    public EntryBackupProcessor getBackupProcessor() {
        return backupProcessor;
    }

}