Examples with Rational android.util.Rational used on opensource projects

Example 16 with Rational

use of android.util.Rational in project android_frameworks_base by AOSPA.

the class ColorSpaceTransform method equals.

/**
     * Check if this {@link ColorSpaceTransform} is equal to another {@link ColorSpaceTransform}.
     *
     * <p>Two color space transforms are equal if and only if all of their elements are
     * {@link Object#equals equal}.</p>
     *
     * @return {@code true} if the objects were equal, {@code false} otherwise
     */
@Override
public boolean equals(final Object obj) {
    if (obj == null) {
        return false;
    }
    if (this == obj) {
        return true;
    }
    if (obj instanceof ColorSpaceTransform) {
        final ColorSpaceTransform other = (ColorSpaceTransform) obj;
        for (int i = 0, j = 0; i < COUNT; ++i, j += RATIONAL_SIZE) {
            int numerator = mElements[j + OFFSET_NUMERATOR];
            int denominator = mElements[j + OFFSET_DENOMINATOR];
            int numeratorOther = other.mElements[j + OFFSET_NUMERATOR];
            int denominatorOther = other.mElements[j + OFFSET_DENOMINATOR];
            Rational r = new Rational(numerator, denominator);
            Rational rOther = new Rational(numeratorOther, denominatorOther);
            if (!r.equals(rOther)) {
                return false;
            }
        }
        return true;
    }
    return false;
}

Example 17 with Rational

use of android.util.Rational in project platform_frameworks_base by android.

the class CameraMetadataTest method testReadWritePrimitive.

@SmallTest
public void testReadWritePrimitive() {
    // int32 (single)
    checkKeyGetAndSet("android.control.aeExposureCompensation", Integer.TYPE, 0xC0FFEE);
    // byte (single)
    checkKeyGetAndSet("android.flash.maxEnergy", Byte.TYPE, (byte) 6);
    // int64 (single)
    checkKeyGetAndSet("android.flash.firingTime", Long.TYPE, 0xABCD12345678FFFFL);
    // float (single)
    checkKeyGetAndSet("android.lens.aperture", Float.TYPE, Float.MAX_VALUE);
    // double (single) -- technically double x 3, but we fake it
    checkKeyGetAndSet("android.jpeg.gpsCoordinates", Double.TYPE, Double.MAX_VALUE);
    // rational (single)
    checkKeyGetAndSet("android.sensor.baseGainFactor", Rational.class, new Rational(1, 2));
    /**
         * Weirder cases, that don't map 1:1 with the native types
         */
    // bool (single) -- with TYPE_BYTE
    checkKeyGetAndSet("android.control.aeLock", Boolean.TYPE, true);
    // integer (single) -- with TYPE_BYTE
    checkKeyGetAndSet("android.control.aePrecaptureTrigger", Integer.TYPE, 6);
}

Example 18 with Rational

use of android.util.Rational in project platform_frameworks_base by android.

the class RationalTest method testCompareTo.

@SmallTest
public void testCompareTo() {
    // unit is equal to itself
    assertCompareEquals(UNIT, new Rational(1, 1));
    // NaN is greater than anything but NaN
    assertCompareEquals(NaN, new Rational(0, 0));
    assertGreaterThan(NaN, UNIT);
    assertGreaterThan(NaN, POSITIVE_INFINITY);
    assertGreaterThan(NaN, NEGATIVE_INFINITY);
    assertGreaterThan(NaN, ZERO);
    // Positive infinity is greater than any other non-NaN
    assertCompareEquals(POSITIVE_INFINITY, new Rational(1, 0));
    assertGreaterThan(POSITIVE_INFINITY, UNIT);
    assertGreaterThan(POSITIVE_INFINITY, NEGATIVE_INFINITY);
    assertGreaterThan(POSITIVE_INFINITY, ZERO);
    // Negative infinity is smaller than any other non-NaN
    assertCompareEquals(NEGATIVE_INFINITY, new Rational(-1, 0));
    assertLessThan(NEGATIVE_INFINITY, UNIT);
    assertLessThan(NEGATIVE_INFINITY, POSITIVE_INFINITY);
    assertLessThan(NEGATIVE_INFINITY, ZERO);
    // A finite number with the same denominator is trivially comparable
    assertGreaterThan(new Rational(3, 100), new Rational(1, 100));
    assertGreaterThan(new Rational(3, 100), ZERO);
    // Compare finite numbers with different divisors
    assertGreaterThan(new Rational(5, 25), new Rational(1, 10));
    assertGreaterThan(new Rational(5, 25), ZERO);
    // Compare finite numbers with different signs
    assertGreaterThan(new Rational(5, 25), new Rational(-1, 10));
    assertLessThan(new Rational(-5, 25), ZERO);
}

Example 19 with Rational

use of android.util.Rational in project platform_frameworks_base by android.

the class RationalTest method testSerialize.

@SmallTest
public void testSerialize() throws ClassNotFoundException, IOException {
    /*
         * Check correct [de]serialization
         */
    assertEqualsAfterSerializing(ZERO);
    assertEqualsAfterSerializing(NaN);
    assertEqualsAfterSerializing(NEGATIVE_INFINITY);
    assertEqualsAfterSerializing(POSITIVE_INFINITY);
    assertEqualsAfterSerializing(UNIT);
    assertEqualsAfterSerializing(new Rational(100, 200));
    assertEqualsAfterSerializing(new Rational(-100, 200));
    assertEqualsAfterSerializing(new Rational(5, 1));
    assertEqualsAfterSerializing(new Rational(Integer.MAX_VALUE, Integer.MIN_VALUE));
    /*
         * Check bad deserialization fails
         */
    try {
        // [0, 100] , should be [0, 1]
        Rational badZero = createIllegalRational(0, 100);
        Rational results = serializeRoundTrip(badZero);
        fail("Deserializing " + results + " should not have succeeded");
    } catch (InvalidObjectException e) {
    // OK
    }
    try {
        // [100, 0] , should be [1, 0]
        Rational badPosInfinity = createIllegalRational(100, 0);
        Rational results = serializeRoundTrip(badPosInfinity);
        fail("Deserializing " + results + " should not have succeeded");
    } catch (InvalidObjectException e) {
    // OK
    }
    try {
        Rational badNegInfinity = // [-100, 0] , should be [-1, 0]
        createIllegalRational(-100, 0);
        Rational results = serializeRoundTrip(badNegInfinity);
        fail("Deserializing " + results + " should not have succeeded");
    } catch (InvalidObjectException e) {
    // OK
    }
    try {
        // [2,4] , should be [1, 2]
        Rational badReduced = createIllegalRational(2, 4);
        Rational results = serializeRoundTrip(badReduced);
        fail("Deserializing " + results + " should not have succeeded");
    } catch (InvalidObjectException e) {
    // OK
    }
    try {
        // [-2, 4] should be [-1, 2]
        Rational badReducedNeg = createIllegalRational(-2, 4);
        Rational results = serializeRoundTrip(badReducedNeg);
        fail("Deserializing " + results + " should not have succeeded");
    } catch (InvalidObjectException e) {
    // OK
    }
}

Example 20 with Rational

use of android.util.Rational in project platform_frameworks_base by android.

the class RationalTest method testConstructor.

@SmallTest
public void testConstructor() {
    // Simple case
    Rational r = new Rational(1, 2);
    assertEquals(1, r.getNumerator());
    assertEquals(2, r.getDenominator());
    // Denominator negative
    r = new Rational(-1, 2);
    assertEquals(-1, r.getNumerator());
    assertEquals(2, r.getDenominator());
    // Numerator negative
    r = new Rational(1, -2);
    assertEquals(-1, r.getNumerator());
    assertEquals(2, r.getDenominator());
    // Both negative
    r = new Rational(-1, -2);
    assertEquals(1, r.getNumerator());
    assertEquals(2, r.getDenominator());
    // Infinity.
    r = new Rational(1, 0);
    assertEquals(1, r.getNumerator());
    assertEquals(0, r.getDenominator());
    // Negative infinity.
    r = new Rational(-1, 0);
    assertEquals(-1, r.getNumerator());
    assertEquals(0, r.getDenominator());
    // NaN.
    r = new Rational(0, 0);
    assertEquals(0, r.getNumerator());
    assertEquals(0, r.getDenominator());
}