Java tutorial
/** * Licensed to Apereo under one or more contributor license * agreements. See the NOTICE file distributed with this work * for additional information regarding copyright ownership. * Apereo 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 the following location: * * 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.apereo.portal.events.aggr; import static org.junit.Assert.assertEquals; import java.util.Random; import org.apache.commons.math3.stat.descriptive.StorelessUnivariateStatistic; import org.apache.commons.math3.stat.descriptive.moment.SecondMoment; import org.apache.commons.math3.stat.descriptive.rank.Max; import org.apache.commons.math3.stat.descriptive.rank.Min; import org.apache.commons.math3.stat.descriptive.summary.Sum; import org.apache.commons.math3.stat.descriptive.summary.SumOfLogs; import org.apache.commons.math3.stat.descriptive.summary.SumOfSquares; import org.apereo.portal.test.BaseAggrEventsJpaDaoTest; import org.junit.Ignore; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility; import com.fasterxml.jackson.annotation.JsonFilter; import com.fasterxml.jackson.annotation.PropertyAccessor; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.ObjectReader; import com.fasterxml.jackson.databind.ObjectWriter; import com.fasterxml.jackson.databind.ser.FilterProvider; import com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter; import com.fasterxml.jackson.databind.ser.impl.SimpleFilterProvider; @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = "classpath:jpaAggrEventsTestContext.xml") public class JpaStatisticalSummaryTest extends BaseAggrEventsJpaDaoTest { // @Test // public void testJpaStatisticalSummary() { // final long id = this.executeInTransaction(new Callable<Long>() { // @Override // public Long call() throws Exception { // final JpaStatisticalSummary jpaStatisticalSummary = new JpaStatisticalSummary(); // // final Random r = new Random(0); // for (int i = 0; i < 10; i++) { // final int nextInt = r.nextInt(100000000); // jpaStatisticalSummary.addValue(nextInt); // } // // getEntityManager().persist(jpaStatisticalSummary); // // System.out.println(jpaStatisticalSummary); // // return jpaStatisticalSummary.getStatSummaryId(); // } // }); // // System.out.println(id); // // this.executeInTransaction(new CallableWithoutResult() { // @Override // protected void callWithoutResult() { // final JpaStatisticalSummary jpaStatisticalSummary = getEntityManager().find(JpaStatisticalSummary.class, id); // // System.out.println(jpaStatisticalSummary); // } // }); // } @Ignore @Test public void testSummaryStatisticsJson() throws Exception { final SecondMoment secondMoment = new SecondMoment(); final Sum sum = new Sum(); final SumOfSquares sumsq = new SumOfSquares(); final Min min = new Min(); final Max max = new Max(); final SumOfLogs sumLog = new SumOfLogs(); final Random r = new Random(0); for (int i = 0; i < 10; i++) { final int nextInt = r.nextInt(100000000); secondMoment.increment(nextInt); sum.increment(nextInt); sumsq.increment(nextInt); min.increment(nextInt); max.increment(nextInt); sumLog.increment(nextInt); } testStorelessUnivariateStatistic(secondMoment, 7.513432791665536E15); testStorelessUnivariateStatistic(sum, 6.01312177E8); testStorelessUnivariateStatistic(sumsq, 4.3671066212513456E16); testStorelessUnivariateStatistic(min, 2116447.0); testStorelessUnivariateStatistic(max, 8.5505948E7); testStorelessUnivariateStatistic(sumLog, 175.91713800250577); } public void testStorelessUnivariateStatistic(StorelessUnivariateStatistic sus, double expected) throws Exception { assertEquals(expected, sus.getResult(), 0.1); final ObjectMapper mapper = new ObjectMapper(); mapper.findAndRegisterModules(); //Configure Jackson to just use fields mapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY); mapper.setVisibility(PropertyAccessor.GETTER, Visibility.NONE); mapper.setVisibility(PropertyAccessor.IS_GETTER, Visibility.NONE); mapper.setVisibility(PropertyAccessor.SETTER, Visibility.NONE); mapper.setVisibility(PropertyAccessor.CREATOR, Visibility.NONE); mapper.addMixInAnnotations(Object.class, IgnoreTypeMixIn.class); final FilterProvider filters = new SimpleFilterProvider().addFilter("storedDataFilter", SimpleBeanPropertyFilter.serializeAllExcept("storedData")); final ObjectWriter ssWriter = mapper.writer(filters); final ObjectReader ssReader = mapper.reader(sus.getClass()); final String susString = ssWriter.writeValueAsString(sus); System.out.println(susString); final StorelessUnivariateStatistic newSus = ssReader.readValue(susString); assertEquals(expected, newSus.getResult(), 0.1); } @JsonFilter("storedDataFilter") private interface IgnoreTypeMixIn { } }