edu.uiowa.icts.bluebutton.json.view.StatsFinder.java Source code

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Here is the source code for edu.uiowa.icts.bluebutton.json.view.StatsFinder.java

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package edu.uiowa.icts.bluebutton.json.view;

/*
 * #%L
 * blue-button Spring MVC Web App
 * %%
 * Copyright (C) 2014 - 2015 University of Iowa Institute for Clinical and Translational Science (ICTS)
 * %%
 * Licensed 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.
 * #L%
 */

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import org.apache.commons.math3.stat.descriptive.SummaryStatistics;
import org.apache.commons.math3.stat.descriptive.moment.Variance;

import com.fasterxml.jackson.annotation.JsonIgnore;

public class StatsFinder {

    private List<IGetStats> list;

    public StatsFinder(List<IGetStats> list) {
        this.list = list;
    }

    public Double getStandardDeviation() {
        return (findStats().getN() != 0L) ? findStats().getStandardDeviation() : null;
    }

    public Double getMean() {
        return (findStats().getN() != 0L) ? findStats().getMean() : null;
    }

    public Double getVariance() {
        return (findStats().getN() != 0L) ? findStats().getPopulationVariance() : null;
    }

    private SummaryStatistics findStats() {
        SummaryStatistics stats = new SummaryStatistics();
        stats.setVarianceImpl(new Variance(false));
        for (IGetStats d : this.list) {
            if (d.getDoubleValue() != null) {
                stats.addValue(d.getDoubleValue());
            }
        }
        return stats;
    }

    public String getDataSetRange() {
        return (this.getMin().toString()).concat(" to ").concat(this.getMax().toString());
    }

    private List<Double> getDoubleList() {
        List<Double> dList = new ArrayList<Double>();
        for (IGetStats igs : this.list) {
            if (igs.getDoubleValue() != null) {
                dList.add(igs.getDoubleValue());
            }
        }
        return dList;
    }

    public Double getMax() {
        List<Double> dList = this.getDoubleList();
        Double max = Collections.max(dList, new Comparator<Double>() {
            public int compare(Double d, Double d2) {
                if (d > d2) {
                    return 1;
                } else if (d < d2) {
                    return -1;
                }
                return 0;
            }
        });
        return max;
    }

    public Double getMin() {
        List<Double> dList = this.getDoubleList();
        Double min = Collections.min(dList, new Comparator<Double>() {
            public int compare(Double d, Double d2) {
                if (d > d2) {
                    return 1;
                } else if (d < d2) {
                    return -1;
                }
                return 0;
            }
        });
        return min;
    }

    @JsonIgnore
    public List<IGetStats> getList() {
        return list;
    }

}