| /* |
| * 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.theta; |
| |
| import static org.apache.datasketches.theta.BackwardConversions.convertSerVer3toSerVer1; |
| import static org.apache.datasketches.theta.Sketches.getMaxCompactSketchBytes; |
| import static org.apache.datasketches.theta.Sketches.getMaxIntersectionBytes; |
| import static org.apache.datasketches.theta.Sketches.getMaxUnionBytes; |
| import static org.apache.datasketches.theta.Sketches.getMaxUpdateSketchBytes; |
| import static org.apache.datasketches.theta.Sketches.getSerializationVersion; |
| import static org.apache.datasketches.theta.Sketches.heapifySetOperation; |
| import static org.apache.datasketches.theta.Sketches.heapifySketch; |
| import static org.apache.datasketches.theta.Sketches.setOperationBuilder; |
| import static org.apache.datasketches.theta.Sketches.updateSketchBuilder; |
| import static org.apache.datasketches.theta.Sketches.wrapSetOperation; |
| import static org.apache.datasketches.theta.Sketches.wrapSketch; |
| import static org.testng.Assert.assertEquals; |
| import static org.testng.Assert.assertFalse; |
| import static org.testng.Assert.assertTrue; |
| |
| import org.testng.annotations.Test; |
| |
| import org.apache.datasketches.memory.Memory; |
| import org.apache.datasketches.memory.WritableMemory; |
| import org.apache.datasketches.SketchesArgumentException; |
| import org.apache.datasketches.Util; |
| |
| /** |
| * @author Lee Rhodes |
| */ |
| @SuppressWarnings("javadoc") |
| public class SketchesTest { |
| |
| private static Memory getCompactSketchMemory(int k, int from, int to) { |
| UpdateSketch sk1 = updateSketchBuilder().setNominalEntries(k).build(); |
| for (int i=from; i<to; i++) { |
| sk1.update(i); |
| } |
| CompactSketch csk = sk1.compact(true, null); |
| byte[] sk1bytes = csk.toByteArray(); |
| Memory mem = Memory.wrap(sk1bytes); |
| return mem; |
| } |
| |
| private static Memory getMemoryFromCompactSketch(CompactSketch csk) { |
| byte[] sk1bytes = csk.toByteArray(); |
| Memory mem = Memory.wrap(sk1bytes); |
| return mem; |
| } |
| |
| private static CompactSketch getCompactSketch(int k, int from, int to) { |
| UpdateSketch sk1 = updateSketchBuilder().setNominalEntries(k).build(); |
| for (int i=from; i<to; i++) { |
| sk1.update(i); |
| } |
| return sk1.compact(true, null); |
| } |
| |
| @Test |
| public void checkSketchMethods() { |
| int k = 1024; |
| Memory mem = getCompactSketchMemory(k, 0, k); |
| |
| CompactSketch csk2 = (CompactSketch)heapifySketch(mem); |
| assertEquals((int)csk2.getEstimate(), k); |
| |
| csk2 = (CompactSketch)heapifySketch(mem, Util.DEFAULT_UPDATE_SEED); |
| assertEquals((int)csk2.getEstimate(), k); |
| |
| csk2 = (CompactSketch)wrapSketch(mem); |
| assertEquals((int)csk2.getEstimate(), k); |
| |
| csk2 = (CompactSketch)wrapSketch(mem, Util.DEFAULT_UPDATE_SEED); |
| assertEquals((int)csk2.getEstimate(), k); |
| } |
| |
| @Test |
| public void checkSetOpMethods() { |
| int k = 1024; |
| Memory mem1 = getCompactSketchMemory(k, 0, k); |
| Memory mem2 = getCompactSketchMemory(k, k/2, (3*k)/2); |
| |
| SetOperationBuilder bldr = setOperationBuilder(); |
| Union union = bldr.setNominalEntries(2 * k).buildUnion(); |
| |
| union.update(mem1); |
| CompactSketch cSk = union.getResult(true, null); |
| assertEquals((int)cSk.getEstimate(), k); |
| union.update(mem2); |
| cSk = union.getResult(true, null); |
| assertEquals((int)cSk.getEstimate(), (3*k)/2); |
| |
| byte[] ubytes = union.toByteArray(); |
| WritableMemory uMem = WritableMemory.wrap(ubytes); |
| |
| Union union2 = (Union)heapifySetOperation(uMem); |
| cSk = union2.getResult(true, null); |
| assertEquals((int)cSk.getEstimate(), (3*k)/2); |
| |
| union2 = (Union)heapifySetOperation(uMem, Util.DEFAULT_UPDATE_SEED); |
| cSk = union2.getResult(true, null); |
| assertEquals((int)cSk.getEstimate(), (3*k)/2); |
| |
| union2 = (Union)wrapSetOperation(uMem); |
| cSk = union2.getResult(true, null); |
| assertEquals((int)cSk.getEstimate(), (3*k)/2); |
| |
| union2 = (Union)wrapSetOperation(uMem, Util.DEFAULT_UPDATE_SEED); |
| cSk = union2.getResult(true, null); |
| assertEquals((int)cSk.getEstimate(), (3*k)/2); |
| |
| int serVer = getSerializationVersion(uMem); |
| assertEquals(serVer, 3); |
| } |
| |
| @Test |
| public void checkUtilMethods() { |
| int k = 1024; |
| |
| int maxUnionBytes = getMaxUnionBytes(k); |
| assertEquals((2*k*8)+32, maxUnionBytes); |
| |
| int maxInterBytes = getMaxIntersectionBytes(k); |
| assertEquals((2*k*8)+24, maxInterBytes); |
| |
| int maxCompSkBytes = getMaxCompactSketchBytes(k+1); |
| assertEquals(24+((k+1)*8), maxCompSkBytes); |
| |
| int maxSkBytes = getMaxUpdateSketchBytes(k); |
| assertEquals(24+(2*k*8), maxSkBytes); |
| } |
| |
| @Test |
| public void checkStaticEstimators() { |
| int k = 4096; |
| int u = 4*k; |
| CompactSketch csk = getCompactSketch(k, 0, u); |
| Memory srcMem = getMemoryFromCompactSketch(csk); |
| double est = Sketches.getEstimate(srcMem); |
| assertEquals(est, u, 0.05*u); |
| double rse = 1.0/Math.sqrt(k); |
| double ub = Sketches.getUpperBound(1, srcMem); |
| assertEquals(ub, est+rse, 0.05*u); |
| double lb = Sketches.getLowerBound(1, srcMem); |
| assertEquals(lb, est-rse, 0.05*u); |
| Memory memV1 = convertSerVer3toSerVer1(csk); |
| boolean empty = Sketches.getEmpty(memV1); |
| assertFalse(empty); |
| |
| CompactSketch csk2 = getCompactSketch(k, 0, 0); |
| Memory emptyMemV3 = getMemoryFromCompactSketch(csk2); |
| assertEquals(Sketches.getRetainedEntries(emptyMemV3), 0); |
| assertEquals(Sketches.getThetaLong(emptyMemV3), Long.MAX_VALUE); |
| Memory emptyMemV1 = convertSerVer3toSerVer1(csk2); |
| empty = Sketches.getEmpty(emptyMemV1); |
| assertTrue(empty); |
| } |
| |
| @Test(expectedExceptions = SketchesArgumentException.class) |
| public void checkBadSketchFamily() { |
| Union union = setOperationBuilder().buildUnion(); |
| byte[] byteArr = union.toByteArray(); |
| Memory srcMem = Memory.wrap(byteArr); |
| Sketches.getEstimate(srcMem); //Union is not a Theta Sketch, it is an operation |
| } |
| |
| @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 |
| } |
| |
| } |