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Java example source code file (IntervalsSetTest.java)

This example Java source code file (IntervalsSetTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

intervalsset, intervalssettest, list, regionfactory, test, util, vector1d

The IntervalsSetTest.java Java example source code

/*
 * 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.commons.math3.geometry.euclidean.oned;

import java.util.List;

import org.apache.commons.math3.geometry.euclidean.oned.Interval;
import org.apache.commons.math3.geometry.euclidean.oned.IntervalsSet;
import org.apache.commons.math3.geometry.euclidean.oned.Vector1D;
import org.apache.commons.math3.geometry.partitioning.Region;
import org.apache.commons.math3.geometry.partitioning.RegionFactory;
import org.apache.commons.math3.util.FastMath;
import org.apache.commons.math3.util.Precision;
import org.junit.Assert;
import org.junit.Test;

public class IntervalsSetTest {

    @Test
    public void testInterval() {
        IntervalsSet set = new IntervalsSet(2.3, 5.7, 1.0e-10);
        Assert.assertEquals(3.4, set.getSize(), 1.0e-10);
        Assert.assertEquals(4.0, ((Vector1D) set.getBarycenter()).getX(), 1.0e-10);
        Assert.assertEquals(Region.Location.BOUNDARY, set.checkPoint(new Vector1D(2.3)));
        Assert.assertEquals(Region.Location.BOUNDARY, set.checkPoint(new Vector1D(5.7)));
        Assert.assertEquals(Region.Location.OUTSIDE,  set.checkPoint(new Vector1D(1.2)));
        Assert.assertEquals(Region.Location.OUTSIDE,  set.checkPoint(new Vector1D(8.7)));
        Assert.assertEquals(Region.Location.INSIDE,   set.checkPoint(new Vector1D(3.0)));
        Assert.assertEquals(2.3, set.getInf(), 1.0e-10);
        Assert.assertEquals(5.7, set.getSup(), 1.0e-10);
    }

    @Test
    public void testInfinite() {
        IntervalsSet set = new IntervalsSet(9.0, Double.POSITIVE_INFINITY, 1.0e-10);
        Assert.assertEquals(Region.Location.BOUNDARY, set.checkPoint(new Vector1D(9.0)));
        Assert.assertEquals(Region.Location.OUTSIDE,  set.checkPoint(new Vector1D(8.4)));
        for (double e = 1.0; e <= 6.0; e += 1.0) {
            Assert.assertEquals(Region.Location.INSIDE,
                                set.checkPoint(new Vector1D(FastMath.pow(10.0, e))));
        }
        Assert.assertTrue(Double.isInfinite(set.getSize()));
        Assert.assertEquals(9.0, set.getInf(), 1.0e-10);
        Assert.assertTrue(Double.isInfinite(set.getSup()));

        set = (IntervalsSet) new RegionFactory<Euclidean1D>().getComplement(set);
        Assert.assertEquals(9.0, set.getSup(), 1.0e-10);
        Assert.assertTrue(Double.isInfinite(set.getInf()));

    }

    @Test
    public void testMultiple() {
        RegionFactory<Euclidean1D> factory = new RegionFactory();
        IntervalsSet set = (IntervalsSet)
        factory.intersection(factory.union(factory.difference(new IntervalsSet(1.0, 6.0, 1.0e-10),
                                                              new IntervalsSet(3.0, 5.0, 1.0e-10)),
                                                              new IntervalsSet(9.0, Double.POSITIVE_INFINITY, 1.0e-10)),
                                                              new IntervalsSet(Double.NEGATIVE_INFINITY, 11.0, 1.0e-10));
        Assert.assertEquals(5.0, set.getSize(), 1.0e-10);
        Assert.assertEquals(5.9, ((Vector1D) set.getBarycenter()).getX(), 1.0e-10);
        Assert.assertEquals(Region.Location.OUTSIDE,  set.checkPoint(new Vector1D(0.0)));
        Assert.assertEquals(Region.Location.OUTSIDE,  set.checkPoint(new Vector1D(4.0)));
        Assert.assertEquals(Region.Location.OUTSIDE,  set.checkPoint(new Vector1D(8.0)));
        Assert.assertEquals(Region.Location.OUTSIDE,  set.checkPoint(new Vector1D(12.0)));
        Assert.assertEquals(Region.Location.INSIDE,   set.checkPoint(new Vector1D(1.2)));
        Assert.assertEquals(Region.Location.INSIDE,   set.checkPoint(new Vector1D(5.9)));
        Assert.assertEquals(Region.Location.INSIDE,   set.checkPoint(new Vector1D(9.01)));
        Assert.assertEquals(Region.Location.BOUNDARY, set.checkPoint(new Vector1D(5.0)));
        Assert.assertEquals(Region.Location.BOUNDARY, set.checkPoint(new Vector1D(11.0)));
        Assert.assertEquals( 1.0, set.getInf(), 1.0e-10);
        Assert.assertEquals(11.0, set.getSup(), 1.0e-10);

        List<Interval> list = set.asList();
        Assert.assertEquals(3, list.size());
        Assert.assertEquals( 1.0, list.get(0).getInf(), 1.0e-10);
        Assert.assertEquals( 3.0, list.get(0).getSup(), 1.0e-10);
        Assert.assertEquals( 5.0, list.get(1).getInf(), 1.0e-10);
        Assert.assertEquals( 6.0, list.get(1).getSup(), 1.0e-10);
        Assert.assertEquals( 9.0, list.get(2).getInf(), 1.0e-10);
        Assert.assertEquals(11.0, list.get(2).getSup(), 1.0e-10);

    }

    @Test
    public void testSinglePoint() {
        IntervalsSet set = new IntervalsSet(1.0, 1.0, 1.0e-10);
        Assert.assertEquals(0.0, set.getSize(), Precision.SAFE_MIN);
        Assert.assertEquals(1.0, ((Vector1D) set.getBarycenter()).getX(), Precision.EPSILON);
    }

}

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