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High-performance CSV databinding library

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package com.github.skjolber.stcsv;

import java.io.Reader;
import java.lang.reflect.Constructor;

/**
 * 
 * Static CSV parser generator - for specific parser implementation
 * 


 * Thread-safe.
 * @param  csv line output value 
 * @param  intermediate processor
 */

public class DefaultStaticCsvMapper2 implements StaticCsvMapper2{
	
	// https://stackoverflow.com/questions/28030465/performance-of-invoking-constructor-by-reflection
	private final Constructor> readerConstructor;
	private final Constructor> readerArrayConstructor;

	public DefaultStaticCsvMapper2(Class> cls, Class delegate) throws Exception {
		this.readerConstructor = cls.getConstructor(Reader.class, delegate);
		this.readerArrayConstructor  = cls.getConstructor(Reader.class, char[].class, int.class, int.class, delegate);
	}

	public AbstractCsvReader newInstance(Reader reader, D delegate) {
		try {
			return readerConstructor.newInstance(reader, delegate);
		} catch (Exception e) {
			throw new RuntimeException(e); // should never happen
		}
	}
	
	public AbstractCsvReader newInstance(Reader reader, char[] current, int offset, int length, D delegate) {
		try {
			return readerArrayConstructor.newInstance(reader, current, offset, length, delegate);
		} catch (Exception e) {
			throw new RuntimeException(e); // should never happen
		}
	}
}