Commons vs Native

HashCodeTest.java

package io.github.rodrik.commons;

import java.time.LocalDate;
import java.util.Arrays;

import org.apache.commons.lang3.builder.CompareToBuilder;
import org.apache.commons.lang3.builder.EqualsBuilder;
import org.apache.commons.lang3.builder.HashCodeBuilder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)
public class HashCodeTest {
	
	private static long MAX_ITERATIONS = 100;
	
	@Parameters()
    public static Iterable<DateRange[]> data() {
    	LocalDate startDate = LocalDate.of(2018, 07, 12);
    	LocalDate endDate = LocalDate.of(2018, 07, 13);
    	
    	return Arrays.asList(new DateRange[][]{
    			{new ApacheCommonsDateRange(startDate, endDate), new ApacheCommonsDateRange(startDate, endDate)},
    			{new NativeDateRange(startDate, endDate), new NativeDateRange(startDate, endDate)}
    	});
    }
    
    private DateRange obj1;
    private DateRange obj2;
    public HashCodeTest(DateRange obj1, DateRange obj2) {
    	this.obj1 = obj1;
    	this.obj2 = obj2;
    }
	
	@Test
	public void testCompareTo() {
		for(long i=0; i<MAX_ITERATIONS; i++) {
			obj1.compareTo(obj2);
		}
	}
	
	@Test
	public void testHashCode() {
		for(long i=0; i<MAX_ITERATIONS; i++) {
			obj1.hashCode();
		}
	}

	@Test
	public void testEqualsObject() {
		for(long i=0; i<MAX_ITERATIONS; i++) {
			obj1.equals(obj2);
		}
	}
    
    interface DateRange extends Comparable<DateRange> {
    	public LocalDate getStartDate();
    	public LocalDate getEndDate();
    }
    
    static class ApacheCommonsDateRange implements DateRange {
    	
    	private final LocalDate startDate;
    	private final LocalDate endDate;
    	
    	public ApacheCommonsDateRange(LocalDate startDate, LocalDate endDate) {
    		super();
    		this.startDate = startDate;
    		this.endDate = endDate;
    	}
    	
    	@Override
    	public LocalDate getStartDate() {
    		return startDate;
    	}
    	
    	@Override
    	public LocalDate getEndDate() {
    		return endDate;
    	}
    	
    	@Override
    	public int compareTo(DateRange obj) {
    		return CompareToBuilder.reflectionCompare(this, obj);
    	}
    	
    	@Override
    	public int hashCode() {
    		return HashCodeBuilder.reflectionHashCode(this, false);
    	}
    	
    	@Override
    	public boolean equals(Object obj) {
    		return EqualsBuilder.reflectionEquals(this, obj, false);
    	}
    }
    
    static class NativeDateRange implements DateRange {
    	
    	private final LocalDate startDate;
    	private final LocalDate endDate;
    	
    	public NativeDateRange(LocalDate startDate, LocalDate endDate) {
    		super();
    		this.startDate = startDate;
    		this.endDate = endDate;
    	}
    	
    	@Override
    	public LocalDate getStartDate() {
    		return startDate;
    	}
    	@Override
    	public LocalDate getEndDate() {
    		return endDate;
    	}

    	@Override
    	public int compareTo(DateRange obj) {
    		int compareStartDate = getStartDate().compareTo(obj.getStartDate());
    		return  compareStartDate != 0 ? compareStartDate : getEndDate().compareTo(obj.getEndDate());
    	}
    	
    	@Override
    	public int hashCode() {
    		final int prime = 31;
    		int result = 1;
    		result = prime * result + ((endDate == null) ? 0 : endDate.hashCode());
    		result = prime * result + ((startDate == null) ? 0 : startDate.hashCode());
    		return result;
    	}
    	
    	@Override
    	public boolean equals(Object obj) {
    		if (this == obj)
    			return true;
    		if (obj == null)
    			return false;
    		if (getClass() != obj.getClass())
    			return false;
    		NativeDateRange other = (NativeDateRange) obj;
    		if (endDate == null) {
    			if (other.endDate != null)
    				return false;
    		} else if (!endDate.equals(other.endDate))
    			return false;
    		if (startDate == null) {
    			if (other.startDate != null)
    				return false;
    		} else if (!startDate.equals(other.startDate))
    			return false;
    		return true;
    	}
    	
    }
	
}