Package org.apache.commons.math.ode.sampling

Examples of org.apache.commons.math.ode.sampling.DummyStepInterpolator.storeTime()

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  @Test
  public void testNoReset() throws DerivativeException {

    double[]   y    =   { 0.0, 1.0, -2.0 };
    DummyStepInterpolator interpolator = new DummyStepInterpolator(y, new double[y.length], true);
    interpolator.storeTime(0);
    interpolator.shift();
    interpolator.storeTime(1);

    double[] result = interpolator.getInterpolatedState();
    for (int i = 0; i < result.length; ++i) {
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    double[]   y    =   { 0.0, 1.0, -2.0 };
    DummyStepInterpolator interpolator = new DummyStepInterpolator(y, new double[y.length], true);
    interpolator.storeTime(0);
    interpolator.shift();
    interpolator.storeTime(1);

    double[] result = interpolator.getInterpolatedState();
    for (int i = 0; i < result.length; ++i) {
      assertTrue(Math.abs(result[i] - y[i]) < 1.0e-10);
    }
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  public void testFixedState()
    throws DerivativeException {

    double[]   y    =   { 1.0, 3.0, -4.0 };
    DummyStepInterpolator interpolator = new DummyStepInterpolator(y, new double[y.length], true);
    interpolator.storeTime(0);
    interpolator.shift();
    interpolator.storeTime(1);

    interpolator.setInterpolatedTime(0.1);
    double[] result = interpolator.getInterpolatedState();
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    double[]   y    =   { 1.0, 3.0, -4.0 };
    DummyStepInterpolator interpolator = new DummyStepInterpolator(y, new double[y.length], true);
    interpolator.storeTime(0);
    interpolator.shift();
    interpolator.storeTime(1);

    interpolator.setInterpolatedTime(0.1);
    double[] result = interpolator.getInterpolatedState();
    for (int i = 0; i < result.length; ++i) {
        assertTrue(Math.abs(result[i] - y[i]) < 1.0e-10);
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  public void testSerialization()
  throws DerivativeException, IOException, ClassNotFoundException {

    double[]   y    =   { 0.0, 1.0, -2.0 };
    DummyStepInterpolator interpolator = new DummyStepInterpolator(y, new double[y.length], true);
    interpolator.storeTime(0);
    interpolator.shift();
    interpolator.storeTime(1);

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutputStream    oos = new ObjectOutputStream(bos);
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    double[]   y    =   { 0.0, 1.0, -2.0 };
    DummyStepInterpolator interpolator = new DummyStepInterpolator(y, new double[y.length], true);
    interpolator.storeTime(0);
    interpolator.shift();
    interpolator.storeTime(1);

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutputStream    oos = new ObjectOutputStream(bos);
    oos.writeObject(interpolator);
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        double t0 = r1 - 0.5 * gap;
        es.reinitializeBegin(t0, new double[0]);
        AbstractStepInterpolator interpolator =
            new DummyStepInterpolator(new double[0], new double[0], true);
        interpolator.storeTime(t0);

        interpolator.shift();
        interpolator.storeTime(0.5 * (r1 + r2));
        Assert.assertTrue(es.evaluateStep(interpolator));
        Assert.assertEquals(r1, es.getEventTime(), tolerance);
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        AbstractStepInterpolator interpolator =
            new DummyStepInterpolator(new double[0], new double[0], true);
        interpolator.storeTime(t0);

        interpolator.shift();
        interpolator.storeTime(0.5 * (r1 + r2));
        Assert.assertTrue(es.evaluateStep(interpolator));
        Assert.assertEquals(r1, es.getEventTime(), tolerance);
        es.stepAccepted(es.getEventTime(), new double[0]);

        interpolator.shift();
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        Assert.assertTrue(es.evaluateStep(interpolator));
        Assert.assertEquals(r1, es.getEventTime(), tolerance);
        es.stepAccepted(es.getEventTime(), new double[0]);

        interpolator.shift();
        interpolator.storeTime(r2 + 0.4 * gap);
        Assert.assertTrue(es.evaluateStep(interpolator));
        Assert.assertEquals(r2, es.getEventTime(), tolerance);

    }

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      return false;
  }

  private StepInterpolator buildInterpolator(double t0, double[] y0, double t1) {
      DummyStepInterpolator interpolator  = new DummyStepInterpolator(y0, new double[y0.length], t1 >= t0);
      interpolator.storeTime(t0);
      interpolator.shift();
      interpolator.storeTime(t1);
      return interpolator;
  }
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