Java tutorial
/* 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.edgent.analytics.math3.stat; import org.apache.commons.math3.stat.descriptive.StorelessUnivariateStatistic; import org.apache.edgent.analytics.math3.json.JsonUnivariateAggregator; import com.google.gson.JsonElement; import com.google.gson.JsonObject; /** * JSON univariate aggregator implementation wrapping a {@code StorelessUnivariateStatistic}. */ public class JsonStorelessStatistic implements JsonUnivariateAggregator { private final Statistic stat; private final StorelessUnivariateStatistic statImpl; public JsonStorelessStatistic(Statistic stat, StorelessUnivariateStatistic statImpl) { this.stat = stat; this.statImpl = statImpl; } @Override public void clear(JsonElement partition, int n) { statImpl.clear(); } @Override public void increment(double v) { statImpl.increment(v); } @Override public void result(JsonElement partition, JsonObject result) { double rv = statImpl.getResult(); if (Double.isFinite(rv)) result.addProperty(stat.name(), rv); } }