@Override
public final Object getValue(Tuple tuple, PDataType type, ImmutableBytesWritable ptr)
throws SQLException {
try {
Expression expression = getExpression();
if (!expression.evaluate(tuple, ptr)) {
return null;
}
if (ptr.getLength() == 0) {
return null;
}
return type.toObject(
ptr,
expression.getDataType(),
expression.getSortOrder(),
expression.getMaxLength(),
expression.getScale());
} catch (RuntimeException e) {
// FIXME: Expression.evaluate does not throw SQLException
// so this will unwrap throws from that.
if (e.getCause() instanceof SQLException) {
throw (SQLException) e.getCause();
}
throw e;
}
}
private void evaluateAndAssertResult(
Expression expression, Object expectedResult, String context) {
context = context == null ? "" : context;
ImmutableBytesWritable ptr = new ImmutableBytesWritable();
assertTrue(expression.evaluate(null, ptr));
PDataType dataType = expression.getDataType();
SortOrder sortOrder = expression.getSortOrder();
Object result =
dataType.toObject(ptr.get(), ptr.getOffset(), ptr.getLength(), dataType, sortOrder);
assertEquals(context, expectedResult, result);
}