com.lambdaworks.redis.output.ListOfMapsOutput Maven / Gradle / Ivy

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Advanced and thread-safe Java Redis client for synchronous, asynchronous, and reactive usage. Supports Cluster, Sentinel, Pipelining, Auto-Reconnect, Codecs and much more.

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/*
 * Copyright 2011-2016 the original author or authors.
 *
 * 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.lambdaworks.redis.output;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import com.lambdaworks.redis.codec.RedisCodec;

/**
 * {@link java.util.List} of maps output.
 * 
 * @param  Key type.
 * @param  Value type.
 * 
 * @author Will Glozer
 */
public class ListOfMapsOutput extends CommandOutput>> {
    private MapOutput nested;
    private int mapCount = -1;
    private List counts = new ArrayList<>();

    public ListOfMapsOutput(RedisCodec codec) {
        super(codec, new ArrayList<>());
        nested = new MapOutput<>(codec);
    }

    @Override
    public void set(ByteBuffer bytes) {
        nested.set(bytes);
    }

    @Override
    public void complete(int depth) {

        if (!counts.isEmpty()) {
            int expectedSize = counts.get(0);

            if (nested.get().size() == expectedSize) {
                counts.remove(0);
                output.add(new LinkedHashMap<>(nested.get()));
                nested.get().clear();
            }
        }
    }

    @Override
    public void multi(int count) {
        if (mapCount == -1) {
            mapCount = count;
        } else {
            // div 2 because of key value pair counts twice
            counts.add(count / 2);
        }
    }
}