/** {@inheritDoc} */
@Override
@SuppressWarnings("unchecked")
public <N extends Number> Expression<N> sum(N x, Expression<? extends N> y) {
final TypeImpl<N> type = (TypeImpl<N>) this.metamodel.type(x.getClass());
return new ArithmeticExression<N>(
ArithmeticOperation.ADD, new EntityConstantExpression<N>(type, x), y);
}
@Override
@SuppressWarnings({"unchecked"})
public <N extends Number> Expression<N> diff(N n, Expression<? extends N> expression) {
if (n == null || expression == null) {
throw new IllegalArgumentException("arguments to diff() cannot be null");
}
final Class resultType =
BinaryArithmeticOperation.determineResultType(n.getClass(), expression.getJavaType());
return new BinaryArithmeticOperation<N>(
this, resultType, BinaryArithmeticOperation.Operation.SUBTRACT, n, expression);
}
@Override
@SuppressWarnings({"unchecked"})
public <N extends Number> Expression<N> prod(Expression<? extends N> expression, N n) {
if (expression == null || n == null) {
throw new IllegalArgumentException("arguments to prod() cannot be null");
}
final Class resultType =
BinaryArithmeticOperation.determineResultType(expression.getJavaType(), n.getClass());
return new BinaryArithmeticOperation<N>(
this, resultType, BinaryArithmeticOperation.Operation.MULTIPLY, expression, n);
}
@SuppressWarnings("unchecked")
public static <N extends Number> N zeroLike(N val) {
if (val instanceof Double) {
return (N) (Double) 0d;
}
if (val instanceof Float) {
return (N) (Float) 0f;
}
if (val instanceof Long) {
return (N) (Long) 0l;
}
if (val instanceof Integer) {
return (N) (Integer) 0;
}
if (val instanceof Short) {
return (N) (Short) (short) 0;
}
throw new IllegalArgumentException("Cannot add to " + val.getClass().getName());
}
@SuppressWarnings("unchecked")
public static <N extends Number> N addTo(N val, double more) {
if (val instanceof Double) {
return (N) new Double(((Double) val).doubleValue() + more);
}
if (val instanceof Float) {
return (N) new Float(((Float) val).floatValue() + more);
}
if (val instanceof Long) {
return (N) new Long((long) (((Long) val).longValue() + more));
}
if (val instanceof Integer) {
return (N) new Integer((int) (((Integer) val).intValue() + more));
}
if (val instanceof Short) {
return (N) new Short((short) (((Short) val).shortValue() + more));
}
throw new IllegalArgumentException("Cannot add to " + val.getClass().getName());
}
/**
* Gets BufferType given a Number. User should check for null return.
*
* @param <N> the getType of value, a Number
* @param value the Number to match against enum values
* @return BufferType if match is found, null if not
* @throws NullPointerException
*/
public static <N extends Number> BufferType getType(N value) {
if (value == null) {
throw new NullPointerException();
}
BufferType type = null;
String instanceClassName = value.getClass().getName();
for (BufferType t : BufferType.values()) {
if (instanceClassName.contains(t.VALUE_CLASS.getSimpleName())) {
type = t;
break;
}
}
if (type == null) {
throw new NullPointerException();
}
return type;
}