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Spring Batch Redis

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package com.redis.spring.batch.reader;

import java.util.Iterator;
import java.util.List;
import java.util.function.Function;

import com.redis.spring.batch.KeyValue;
import com.redis.spring.batch.util.CodecUtils;

import io.lettuce.core.codec.RedisCodec;

public class ListToKeyValue implements Function> {

    private final Function toStringValueFunction;

    public ListToKeyValue(RedisCodec codec) {
        this.toStringValueFunction = CodecUtils.toStringValueFunction(codec);
    }

    @SuppressWarnings("unchecked")
    @Override
    public KeyValue apply(Object item) {
        if (item == null) {
            return null;
        }
        KeyValue keyValue = new KeyValue<>();
        Iterator