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Functional and reactive JDBC client in Java

There is a newer version: 3.0.0-RC2

package jio.jdbc;

import java.util.List;
import java.util.Objects;
import java.util.function.Supplier;

public final class QueryStmBuilder implements Supplier>> {
    private static final int DEFAULT_FETCH_SIZE = 1000;

    private final String sqlQuery;
    private final ParamsSetter setter;
    private final ResultSetMapper mapper;
    private int fetchSize = DEFAULT_FETCH_SIZE;
    private boolean enableJFR = true;

    private QueryStmBuilder(String sqlQuery, ParamsSetter setter, ResultSetMapper mapper) {
        this.sqlQuery = Objects.requireNonNull(sqlQuery);
        this.setter = Objects.requireNonNull(setter);
        this.mapper = Objects.requireNonNull(mapper);
    }

    public static  QueryStmBuilder of(String sqlQuery, ParamsSetter setter, ResultSetMapper mapper) {
        return new QueryStmBuilder<>(sqlQuery, setter, mapper);
    }

    public QueryStmBuilder withFetchSize(int fetchSize) {
        if (fetchSize <= 0) throw new IllegalArgumentException("fetchSize <=0");
        this.fetchSize = fetchSize;
        return this;
    }

    public QueryStmBuilder withoutRecordedEvents() {
        this.enableJFR = false;
        return this;
    }

    @Override
    public QueryStm get() {
        return new QueryStm<>(sqlQuery, setter, mapper, fetchSize, enableJFR);
    }
}