@Override
public void setDeterministic(Value value) {
int index = value.getIndex();
if (index < 0) {
throw new IllegalArgumentException(format("%s is not discrete", value));
}
setDeterministicIndex(index);
}
/**
* Sets values for domain from datum.
*
* <p>
*
* @param domain discrete domain with size matching {@link #size()}.
* @param datum either an exact {@link Value}, another {@link DiscreteMessage} or other {@link
* IUnaryFactorFunction} used to evaluate energies for all possible discrete values.
* @since 0.08
*/
public void setFrom(DiscreteDomain domain, IDatum datum) {
if (datum instanceof DiscreteMessage) {
setFrom((DiscreteMessage) datum);
} else if (datum instanceof Value) {
Value value = (Value) datum;
if (domain.equals(value.getDomain())) {
setDeterministicIndex(value.getIndex());
} else {
setDeterministicIndex(domain.getIndex(value.getObject()));
}
} else {
IUnaryFactorFunction function = (IUnaryFactorFunction) datum;
assertSameSize(domain.size());
DiscreteValue value = Value.create(domain);
for (int i = domain.size(); --i >= 0; ) {
value.setIndex(i);
setEnergy(i, function.evalEnergy(value));
}
}
}
private void assertInvariants(Value value) {
Domain domain = value.getDomain();
assertNotNull(domain);
Object objValue = value.getObject();
domain.inDomain(objValue);
if (domain.isIntegral()) {
assertEquals(value.getInt(), value.getDouble(), 0.0);
assertEquals(value.getInt(), objValue);
}
if (domain.isReal()) {
assertEquals(value.getDouble(), objValue);
}
if (objValue instanceof Number) {
Number number = (Number) objValue;
assertEquals(number.intValue(), value.getInt());
assertEquals(number.doubleValue(), value.getDouble(), 0.0);
assertEquals(number.doubleValue() != 0.0, value.getBoolean());
} else if (objValue instanceof Boolean) {
Boolean bool = (Boolean) objValue;
assertEquals(bool, value.getBoolean());
assertEquals(bool, value.getInt() == 1);
assertEquals(bool, value.getDouble() == 1.0);
}
Value value2 = value.clone();
assertNotSame(value, value2);
assertSame(value.getClass(), value2.getClass());
assertEquals(value.getObject(), value2.getObject());
assertEquals(value.getIndex(), value2.getIndex());
assertTrue(value.valueEquals(value2));
Value value3 = Value.create(domain);
assertEquals(value.getClass(), value3.getClass());
value3.setFrom(value);
assertTrue(value3.valueEquals(value));
assertEquals(objValue, value3.getObject());
assertEquals(value.getIndex(), value3.getIndex());
Value value4 = Value.create(domain, objValue);
assertEquals(objValue, value4.getObject());
assertEquals(value.getIndex(), value4.getIndex());
}
private @Nullable IDatum joinPriors(
JointDiscreteDomain<?> jointDomain, IDatum[] subdomainPriors) {
final JointDomainIndexer domains = jointDomain.getDomainIndexer();
final int dimensions = jointDomain.getDimensions();
boolean hasPrior = false;
int[] fixedIndices = new int[dimensions];
Arrays.fill(fixedIndices, -1);
for (int i = 0; i < dimensions; ++i) {
DiscreteDomain domain = domains.get(i);
IDatum prior = subdomainPriors[i];
if (prior != null) {
hasPrior = true;
if (prior instanceof Value) {
Value value = (Value) prior;
fixedIndices[i] =
domain.equals(value.getDomain())
? value.getIndex()
: domain.getIndex(value.getObject());
subdomainPriors[i] = new DiscreteEnergyMessage(domain, value);
} else {
DiscreteMessage msg =
prior instanceof DiscreteMessage
? (DiscreteMessage) prior
: new DiscreteWeightMessage(domain, prior);
subdomainPriors[i] = msg;
fixedIndices[i] = msg.toDeterministicValueIndex();
}
}
}
if (!hasPrior) {
// If none of the component variables has a prior, then neither will the joint variable.
return null;
}
boolean hasAllFixedPriors = true;
for (int i : fixedIndices) {
if (i < 0) {
hasAllFixedPriors = false;
break;
}
}
if (hasAllFixedPriors) {
// Return fixed value with appropriate joint index.
return Value.createWithIndex(jointDomain, domains.jointIndexFromIndices(fixedIndices));
}
int cardinality = jointDomain.size();
double[] energies = new double[cardinality];
int inner = 1, outer = cardinality;
for (int dim = 0; dim < dimensions; ++dim) {
final DiscreteDomain domain = domains.get(dim);
final DiscreteMessage prior = (DiscreteMessage) subdomainPriors[dim];
final int size = domain.size();
int i = 0;
outer /= size;
if (prior != null) {
for (int o = 0; o < outer; ++o) {
for (double energy : prior.getEnergies()) {
for (int r = 0; r < inner; ++r) {
energies[i++] += energy;
}
}
}
}
inner *= size;
}
return new DiscreteEnergyMessage(energies);
}
/**
* If prior is a {@link DiscreteValue}, returns its index, otherwise -1.
*
* @since 0.08
*/
public final int getPriorIndex() {
Value value = getPriorValue();
return value != null ? value.getIndex() : -1;
}
@Test
public void test() {
//
// Test creation
//
Domain domain = ObjectDomain.instance();
Value value = Value.create(domain);
assertInvariants(value);
assertSame(domain, value.getDomain());
domain = DiscreteDomain.bit();
value = Value.create(domain);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(0, value.getInt());
assertEquals(0, value.getIndex());
assertEquals(0, value.getObject());
assertTrue(value instanceof SimpleIntRangeValue);
domain = DiscreteDomain.range(2, 5);
value = Value.create(domain);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(2, value.getInt());
assertEquals(0, value.getIndex());
assertTrue(value instanceof IntRangeValue);
domain = DiscreteDomain.range(0, 4, 2);
value = Value.create(domain);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(0, value.getInt());
assertEquals(0, value.getIndex());
assertTrue(value instanceof IntRangeValue);
domain = DiscreteDomain.create(1, 2, 3, 5, 8, 13);
value = Value.create(domain);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(1, value.getInt());
assertEquals(0, value.getIndex());
assertTrue(value instanceof GenericIntDiscreteValue);
domain = DiscreteDomain.create(1, 2, 3.5);
value = Value.create(domain);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(1, value.getObject());
assertEquals(0, value.getIndex());
assertTrue(value instanceof GenericDiscreteValue);
domain = RealDomain.unbounded();
value = Value.create(domain);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(0.0, value.getDouble(), 0.0);
assertTrue(value instanceof RealValue);
domain = RealJointDomain.create(2);
value = Value.create(domain);
assertInvariants(value);
assertEquals(domain, value.getDomain());
assertTrue(value instanceof RealJointValue);
domain = IntDomain.unbounded();
value = Value.create(domain);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertTrue(value instanceof IntValue);
domain = DiscreteDomain.range(0, 9);
value = Value.create(domain, 3);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(3, value.getInt());
assertEquals(3, value.getIndex());
domain = DiscreteDomain.range(-4, 4);
value = Value.create(domain, 3);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(3, value.getInt());
assertEquals(7, value.getIndex());
domain = DiscreteDomain.range(0, 6, 3);
value = Value.create(domain, 3);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(3, value.getInt());
assertEquals(1, value.getIndex());
domain = DiscreteDomain.create(1, 2, 3, 5);
value = Value.create(domain, 3);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(3, value.getInt());
assertEquals(2, value.getIndex());
domain = DiscreteDomain.create("rabbit", 3, 4.2);
value = Value.create(domain, 3);
assertInvariants(value);
assertSame(domain, value.getDomain());
assertEquals(3, value.getInt());
assertEquals(3, value.getObject());
assertEquals(1, value.getIndex());
value = Value.create(42);
assertInvariants(value);
assertSame(IntDomain.unbounded(), value.getDomain());
assertEquals(42, value.getObject());
assertEquals(42, value.getInt());
value = Value.create((short) 42);
assertInvariants(value);
assertEquals(42, value.getObject());
assertSame(IntDomain.unbounded(), value.getDomain());
value = Value.create((byte) 42);
assertInvariants(value);
assertEquals(42, value.getObject());
assertSame(IntDomain.unbounded(), value.getDomain());
value = Value.create(42.0);
assertInvariants(value);
assertSame(RealDomain.unbounded(), value.getDomain());
assertEquals(42.0, value.getObject());
double[] array = new double[] {1.0, 3.0};
value = Value.create(array);
assertInvariants(value);
assertEquals(RealJointDomain.create(2), value.getDomain());
assertArrayEquals(array, (double[]) value.getObject(), 0.0);
value = Value.create("foo");
assertInvariants(value);
assertSame(ObjectDomain.instance(), value.getDomain());
assertEquals("foo", value.getObject());
//
// Test integral values
//
value = Value.create(42);
assertEquals(42, value.getInt());
assertEquals(-1, value.getIndex());
value.setInt(23);
expectThrow(DimpleException.class, value, "setIndex", 0);
assertEquals(23, value.getInt());
value.setDouble(1.6);
assertEquals(2, value.getInt());
assertEquals(2.0, value.getDouble(), 0.0);
value.setObject(-40);
assertEquals(-40, value.getInt());
assertTrue(value.valueEquals(Value.create(-40.0)));
assertFalse(value.valueEquals(Value.create(39)));
assertInvariants(value);
Domain digit = DiscreteDomain.range(0, 9);
value = Value.create(digit, 3);
assertEquals(3, value.getInt());
assertEquals(3, value.getIndex());
value.setInt(4);
assertEquals(4, value.getInt());
value.setDouble(5.2);
assertEquals(5, value.getInt());
assertTrue(value.valueEquals(Value.create(5)));
value.setIndex(2);
assertEquals(2, value.getIndex());
assertEquals(2, value.getObject());
assertInvariants(value);
Domain oddDigits = DiscreteDomain.range(1, 9, 2);
value = Value.create(oddDigits, 3);
assertEquals(3, value.getInt());
assertEquals(1, value.getIndex());
value.setInt(5);
assertEquals(5, value.getObject());
assertEquals(2, value.getIndex());
value.setIndex(0);
assertEquals(0, value.getIndex());
assertEquals(1, value.getInt());
value.setObject(9);
assertEquals(9.0, value.getDouble(), 0.0);
assertEquals(4, value.getIndex());
assertFalse(value.valueEquals(Value.create(10)));
assertTrue(value.valueEquals(Value.create(9.1)));
Domain primeDigits = DiscreteDomain.create(2, 3, 5, 7);
value = Value.create(primeDigits, 5);
assertEquals(5, value.getInt());
value.setInt(2);
assertEquals(2, value.getInt());
assertEquals(0, value.getIndex());
value.setIndex(3);
assertEquals(3, value.getIndex());
assertEquals(7, value.getInt());
/*
* Test generic discrete values
*/
DiscreteDomain stooges = DiscreteDomain.create("moe", "joe", "curly");
value = Value.create(stooges);
assertEquals("moe", value.getObject());
assertEquals(0, value.getIndex());
assertInvariants(value);
value.setObject("joe");
assertEquals("joe", value.getObject());
assertEquals(1, value.getIndex());
value.setIndex(2);
assertEquals("curly", value.getObject());
assertEquals(2, value.getIndex());
assertFalse(value.valueEquals(Value.create(stooges, "moe")));
assertTrue(value.valueEquals(Value.create("curly")));
value.setFrom(Value.create("joe"));
assertEquals("joe", value.getObject());
/*
* Test real values
*/
value = Value.create(3.14159);
assertEquals(3.14159, value.getDouble(), 0.0);
value.setInt(42);
assertEquals(42.0, value.getDouble(), 0.0);
value.setDouble(2.3);
assertEquals(2.3, value.getDouble(), 0.0);
value.setObject(-123.4);
assertEquals(-123.4, value.getDouble(), 0.0);
assertFalse(value.valueEquals(Value.create(-123.4002)));
Domain halves = DiscreteDomain.range(0, 10, .5);
value = Value.create(halves, 3);
assertEquals(3, value.getInt());
assertEquals(3, value.getDouble(), 0.0);
assertEquals(6, value.getIndex());
assertInvariants(value);
value.setIndex(1);
assertEquals(.5, value.getDouble(), 0.0);
assertEquals(1, value.getIndex());
Domain realDigits = DiscreteDomain.range(0.0, 9.0);
value = Value.create(realDigits, 3);
assertEquals(3, value.getInt());
assertEquals(3, value.getIndex());
assertInvariants(value);
value.setIndex(5);
assertEquals(5, value.getInt());
Domain powersOfTwo = DiscreteDomain.create(.125, .25, .5, 1.0, 2.0, 4.0, 8.0);
value = Value.create(powersOfTwo);
assertEquals(.125, value.getDouble(), 0.0);
assertInvariants(value);
value.setIndex(2);
assertEquals(.5, value.getDouble(), 0.0);
value.setFrom(Value.create(.25));
assertEquals(1, value.getIndex());
value.setFrom(Value.create(DiscreteDomain.create(2.3, 4.0, 5.0), 4.0));
assertEquals(4.0, value.getDouble(), 0.0);
/*
* Test object values
*/
value = Value.create("foo");
assertEquals("foo", value.getObject());
expectThrow(DimpleException.class, value, "getInt");
value.setInt(42);
assertEquals(42, value.getObject());
assertEquals(42, value.getInt());
assertEquals(42.0, value.getDouble(), 0.0);
value.setDouble(23.1);
assertEquals(23.1, value.getObject());
assertEquals(23, value.getInt());
assertEquals(23.1, value.getDouble(), 0.0);
value = Value.create((Domain) null);
assertNull(value.getObject());
assertSame(ObjectDomain.instance(), value.getDomain());
/*
*
*/
}
