| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.datasketches.hll; |
| |
| import static org.testng.Assert.assertEquals; |
| import static org.testng.Assert.assertTrue; |
| import static org.testng.Assert.fail; |
| |
| import java.util.HashSet; |
| |
| import org.apache.datasketches.SketchesArgumentException; |
| import org.apache.datasketches.SketchesReadOnlyException; |
| import org.apache.datasketches.memory.Memory; |
| import org.apache.datasketches.memory.WritableMemory; |
| import org.testng.annotations.Test; |
| |
| /** |
| * @author Lee Rhodes |
| */ |
| @SuppressWarnings("javadoc") |
| public class DirectHllSketchTest { |
| |
| @Test |
| public void checkNoWriteAccess() { |
| noWriteAccess(TgtHllType.HLL_4, 7); |
| noWriteAccess(TgtHllType.HLL_4, 24); |
| noWriteAccess(TgtHllType.HLL_4, 25); |
| noWriteAccess(TgtHllType.HLL_6, 25); |
| noWriteAccess(TgtHllType.HLL_8, 25); |
| } |
| |
| private static void noWriteAccess(TgtHllType tgtHllType, int n) { |
| int lgConfigK = 8; |
| int bytes = HllSketch.getMaxUpdatableSerializationBytes(lgConfigK, tgtHllType); |
| WritableMemory wmem = WritableMemory.allocate(bytes); |
| HllSketch sk = new HllSketch(lgConfigK, tgtHllType, wmem); |
| |
| for (int i = 0; i < n; i++) { sk.update(i); } |
| |
| HllSketch sk2 = HllSketch.wrap(wmem); |
| try { |
| sk2.update(1); |
| fail(); |
| } catch (SketchesReadOnlyException e) { |
| //expected |
| } |
| } |
| |
| @Test |
| public void checkCompactToUpdatable() { |
| int lgConfigK = 15; |
| int n = 1 << 20; |
| TgtHllType type = TgtHllType.HLL_4; |
| |
| int bytes = HllSketch.getMaxUpdatableSerializationBytes(lgConfigK, type); |
| WritableMemory wmem = WritableMemory.allocate(bytes); |
| //create first direct updatable sketch |
| HllSketch sk = new HllSketch(lgConfigK, type, wmem); |
| for (int i = 0; i < n; i++) { sk.update(i); } |
| //Create compact byte arr |
| byte[] cByteArr = sk.toCompactByteArray(); //16496 = (auxStart)16424 + 72 |
| Memory cmem = Memory.wrap(cByteArr); |
| //Create updatable byte arr |
| byte[] uByteArr = sk.toUpdatableByteArray(); //16936 = (auxStart)16424 + 512 |
| //get auxStart and auxArrInts for updatable |
| AbstractHllArray absArr = (AbstractHllArray)sk.hllSketchImpl; |
| int auxStart = absArr.auxStart; |
| int auxArrInts = 1 << absArr.getAuxHashMap().getLgAuxArrInts(); |
| //hash set to check result |
| HashSet<Integer> set = new HashSet<>(); |
| //create HashSet of values |
| PairIterator itr = new IntMemoryPairIterator(uByteArr, auxStart, auxArrInts, lgConfigK); |
| //println(itr.getHeader()); |
| int validCount = 0; |
| while (itr.nextValid()) { |
| set.add(itr.getPair()); |
| validCount++; |
| //println(itr.getString()); |
| } |
| |
| //Wrap the compact image as read-only |
| HllSketch sk2 = HllSketch.wrap(cmem); //cmem is 16496 |
| //serialize it to updatable image |
| byte[] uByteArr2 = sk2.toUpdatableByteArray(); |
| PairIterator itr2 = new IntMemoryPairIterator(uByteArr2, auxStart, auxArrInts, lgConfigK); |
| //println(itr2.getHeader()); |
| int validCount2 = 0; |
| while (itr2.nextValid()) { |
| boolean exists = set.contains(itr2.getPair()); |
| if (exists) { validCount2++; } |
| //println(itr2.getString()); |
| } |
| assertEquals(validCount, validCount2); |
| } |
| |
| @Test |
| public void checkPutKxQ1_Misc() { |
| int bytes = HllSketch.getMaxUpdatableSerializationBytes(4, TgtHllType.HLL_4); |
| WritableMemory wmem = WritableMemory.allocate(bytes); |
| HllSketch sk = new HllSketch(4, TgtHllType.HLL_4, wmem); |
| for (int i = 0; i < 8; i++) { sk.update(i); } |
| assertTrue(sk.getCurMode() == CurMode.HLL); |
| AbstractHllArray absArr = (AbstractHllArray)sk.hllSketchImpl; |
| absArr.putKxQ1(1.0); |
| assertEquals(absArr.getKxQ1(), 1.0); |
| absArr.putKxQ1(0.0); |
| |
| Memory mem = wmem; |
| HllSketch sk2 = HllSketch.wrap(mem); |
| try { |
| sk2.reset(); |
| fail(); |
| } catch (SketchesArgumentException e) { |
| //expected |
| } |
| } |
| |
| @Test |
| public void checkToCompactByteArr() { |
| int bytes = HllSketch.getMaxUpdatableSerializationBytes(4, TgtHllType.HLL_4); |
| WritableMemory wmem = WritableMemory.allocate(bytes); |
| HllSketch sk = new HllSketch(4, TgtHllType.HLL_4, wmem); |
| for (int i = 0; i < 8; i++) { sk.update(i); } |
| byte[] compByteArr = sk.toCompactByteArray(); |
| Memory compMem = Memory.wrap(compByteArr); |
| HllSketch sk2 = HllSketch.wrap(compMem); |
| byte[] compByteArr2 = sk2.toCompactByteArray(); |
| assertEquals(compByteArr2, compByteArr); |
| } |
| |
| @Test |
| public void checkToUpdatableByteArr() { |
| int bytes = HllSketch.getMaxUpdatableSerializationBytes(4, TgtHllType.HLL_4); |
| WritableMemory wmem = WritableMemory.allocate(bytes); |
| HllSketch sk = new HllSketch(4, TgtHllType.HLL_4, wmem); |
| for (int i = 0; i < 8; i++) { sk.update(i); } |
| byte[] udByteArr = sk.toUpdatableByteArray(); |
| byte[] compByteArr = sk.toCompactByteArray(); |
| Memory compMem = Memory.wrap(compByteArr); |
| HllSketch sk2 = HllSketch.wrap(compMem); |
| byte[] udByteArr2 = sk2.toUpdatableByteArray(); |
| assertEquals(udByteArr2, udByteArr); |
| } |
| |
| @Test |
| public void printlnTest() { |
| println("PRINTING: "+this.getClass().getName()); |
| } |
| |
| /** |
| * @param s value to print |
| */ |
| static void println(String s) { |
| //System.out.println(s); //disable here |
| } |
| |
| } |