BaseRedisCommandBuilder.java

package com.lambdaworks.redis.protocol;

import com.lambdaworks.redis.RedisException;
import com.lambdaworks.redis.ScriptOutputType;
import com.lambdaworks.redis.codec.RedisCodec;
import com.lambdaworks.redis.output.*;

/**
 * @author Mark Paluch
 * @since 3.0
 */
public class BaseRedisCommandBuilder<K, V> {

    protected RedisCodec<K, V> codec;

    public BaseRedisCommandBuilder(RedisCodec<K, V> codec) {
        this.codec = codec;
    }

    protected <T> Command<K, V, T> createCommand(CommandType type, CommandOutput<K, V, T> output) {
        return createCommand(type, output, (CommandArgs<K, V>) null);
    }

    protected <T> Command<K, V, T> createCommand(CommandType type, CommandOutput<K, V, T> output, K key) {
        CommandArgs<K, V> args = new CommandArgs<K, V>(codec).addKey(key);
        return createCommand(type, output, args);
    }

    protected <T> Command<K, V, T> createCommand(CommandType type, CommandOutput<K, V, T> output, K key, V value) {
        CommandArgs<K, V> args = new CommandArgs<K, V>(codec).addKey(key).addValue(value);
        return createCommand(type, output, args);
    }

    protected <T> Command<K, V, T> createCommand(CommandType type, CommandOutput<K, V, T> output, K key, V[] values) {
        CommandArgs<K, V> args = new CommandArgs<K, V>(codec).addKey(key).addValues(values);
        return createCommand(type, output, args);
    }

    protected <T> Command<K, V, T> createCommand(CommandType type, CommandOutput<K, V, T> output, CommandArgs<K, V> args) {
        return new Command<K, V, T>(type, output, args);
    }

    @SuppressWarnings("unchecked")
    protected <T> CommandOutput<K, V, T> newScriptOutput(RedisCodec<K, V> codec, ScriptOutputType type) {
        switch (type) {
            case BOOLEAN:
                return (CommandOutput<K, V, T>) new BooleanOutput<K, V>(codec);
            case INTEGER:
                return (CommandOutput<K, V, T>) new IntegerOutput<K, V>(codec);
            case STATUS:
                return (CommandOutput<K, V, T>) new StatusOutput<K, V>(codec);
            case MULTI:
                return (CommandOutput<K, V, T>) new NestedMultiOutput<K, V>(codec);
            case VALUE:
                return (CommandOutput<K, V, T>) new ValueOutput<K, V>(codec);
            default:
                throw new RedisException("Unsupported script output type");
        }
    }
}