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/**
* Copyright 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
/**
* Created on Sunday, March 28 2010 21:01
*/
package com.jogamp.common.util;
import java.io.IOException;
import java.util.Iterator;
import java.util.HashMap;
import java.util.Map.Entry;
import java.util.Random;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
import static java.lang.System.*;
/**
*
* @author Michael Bien
* @author Simon Goller
*/
public class LongIntHashMapTest {
private static int iterations;
private static long[] rndKeys;
private static int[] rndValues;
@BeforeClass
public static void init() {
iterations = 20000;
final int keySeed = 42;
final int valueSeed = 23;
Random keyRnd = new Random(/*keySeed*/);
Random valueRnd = new Random(/*valueSeed*/);
rndKeys = new long[iterations];
rndValues = new int[iterations];
for (int i = 0; i < iterations; i++) {
rndValues[i] = valueRnd.nextInt();
rndKeys[i] = keyRnd.nextLong();
}
}
/**
* Test of put method, of class LongIntHashMap.
*/
@Test
public void testPutRemove() {
final LongIntHashMap intmap = new LongIntHashMap();
final HashMap<Long, Integer> map = new HashMap<Long, Integer>();
// put
for (int i = 0; i < iterations; i++) {
intmap.put(rndKeys[i], rndValues[i]);
assertTrue(intmap.containsValue(rndValues[i]));
assertTrue(intmap.containsKey(rndKeys[i]));
}
for (int i = 0; i < iterations; i++) {
map.put(rndKeys[i], rndValues[i]);
}
assertEquals(map.size(), intmap.size());
for (Entry<Long, Integer> entry : map.entrySet()) {
assertTrue(intmap.containsKey(entry.getKey()));
assertTrue(intmap.containsValue(entry.getValue()));
}
int i = 0;
for (Entry<Long, Integer> entry : map.entrySet()) {
assertEquals((int)entry.getValue(), intmap.remove(entry.getKey()));
assertEquals(map.size() - i - 1, intmap.size());
i++;
}
}
@Test
public void iteratorTest() {
final LongIntHashMap map = new LongIntHashMap(iterations);
for (int i = 0; i < iterations; i++) {
map.put(rndKeys[i], rndValues[i]);
}
Iterator iterator = map.iterator();
assertNotNull(iterator);
assertTrue(iterator.hasNext());
int n = 0;
while (iterator.hasNext()) {
LongIntHashMap.Entry entry = (LongIntHashMap.Entry)iterator.next();
assertNotNull(entry);
n++;
}
assertEquals(map.size(), n);
// out.println(intmap);
}
@Test
public void benchmark() {
benchmark(true);
benchmark(false);
}
void benchmark(boolean warmup) {
// simple benchmark
final LongIntHashMap intmap = new LongIntHashMap(1024);
final HashMap<Long, Integer> map = new HashMap<Long, Integer>(1024);
out.println(intmap.getClass().getName()+" vs "+map.getClass().getName()+
" warmup: " + warmup);
out.println("put");
long time = nanoTime();
for (int i = 0; i < iterations; i++) {
intmap.put(rndKeys[i], rndValues[i]);
}
long intmapPutTime = (nanoTime() - time);
out.println(" iimap: " + intmapPutTime/1000000.0f+"ms");
time = nanoTime();
for (int i = 0; i < iterations; i++) {
map.put(rndKeys[i], rndValues[i]);
}
long mapPutTime = (nanoTime() - time);
out.println(" map: " + mapPutTime/1000000.0f+"ms");
System.out.println();
System.out.println("get");
time = nanoTime();
for (int i = 0; i < iterations; i++) {
intmap.get(rndKeys[i]);
}
long intmapGetTime = (nanoTime() - time);
out.println(" iimap: " + intmapGetTime/1000000.0f+"ms");
time = nanoTime();
for (int i = 0; i < iterations; i++) {
map.get(rndKeys[i]);
}
long mapGetTime = (nanoTime() - time);
out.println(" map: " + mapGetTime/1000000.0f+"ms");
out.println();
out.println("remove");
time = nanoTime();
for (int i = 0; i < iterations; i++) {
intmap.remove(rndKeys[i]);
}
assertEquals(0, intmap.size());
long intmapRemoveTime = (nanoTime() - time);
out.println(" iimap: " + intmapRemoveTime/1000000.0f+"ms");
time = nanoTime();
for (int i = 0; i < iterations; i++) {
map.remove(rndKeys[i]);
}
assertEquals(0, map.size());
long mapRemoveTime = (nanoTime() - time);
out.println(" map: " + mapRemoveTime/1000000.0f+"ms");
if(!warmup) {
// In case the 1st class map magically improves
// we add a tolerance around 50% since this would be hardly a bug.
// The main goal of this primitve map is memory efficiency.
// high and not O(1) assertTrue("'put' too slow", intmapPutTime <= mapPutTime + mapPutTime/4 );
assertTrue("'get' too slow", intmapGetTime <= mapGetTime + mapGetTime/2 );
assertTrue("'remove' too slow", intmapRemoveTime <= mapRemoveTime + mapRemoveTime/2 );
}
}
public static void main(String args[]) throws IOException {
org.junit.runner.JUnitCore.main(LongIntHashMapTest.class.getName());
}
}
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