public static Restrictions getRestrictions(final TypeDefinition<?> type) {
// Old parser generated types which actually contained based restrictions, but our code deals
// with that when
// binding to core Java types. Hence we'll emit empty restrictions for base types.
if (type == null || type.getBaseType() == null) {
// Handling of decimal64 has changed in the new parser. It contains range restrictions applied
// to the type
// directly, without an extended type. We need to capture such constraints. In order to retain
// behavior we
// need to analyze the new semantics and see if the constraints have been overridden. To do
// that we
// instantiate a temporary unconstrained type and compare them.
//
// FIXME: looking at the generated code it looks as though we need to pass the restrictions
// without
// comparison
if (type instanceof DecimalTypeDefinition) {
final DecimalTypeDefinition decimal = (DecimalTypeDefinition) type;
final DecimalTypeBuilder tmpBuilder = BaseTypes.decimalTypeBuilder(decimal.getPath());
tmpBuilder.setFractionDigits(decimal.getFractionDigits());
final DecimalTypeDefinition tmp = tmpBuilder.build();
if (!tmp.getRangeConstraints().equals(decimal.getRangeConstraints())) {
return new Restrictions() {
@Override
public boolean isEmpty() {
return false;
}
@Override
public List<RangeConstraint> getRangeConstraints() {
return decimal.getRangeConstraints();
}
@Override
public List<PatternConstraint> getPatternConstraints() {
return ImmutableList.of();
}
@Override
public List<LengthConstraint> getLengthConstraints() {
return ImmutableList.of();
}
};
}
}
return EMPTY_RESTRICTIONS;
}
final List<LengthConstraint> length;
final List<PatternConstraint> pattern;
final List<RangeConstraint> range;
/*
* Take care of extended types.
*
* Other types which support constraints are check afterwards. There is a slight twist with them, as returned
* constraints are the effective view, e.g. they are inherited from base type. Since the constraint is already
* enforced by the base type, we want to skip them and not perform duplicate checks.
*
* We end up emitting ConcreteType instances for YANG base types, which leads to their constraints not being
* enforced (most notably decimal64). Therefore we need to make sure we do not strip the next-to-last
* restrictions.
*
* FIXME: this probably not the best solution and needs further analysis.
*/
if (type instanceof BinaryTypeDefinition) {
final BinaryTypeDefinition binary = (BinaryTypeDefinition) type;
final BinaryTypeDefinition base = binary.getBaseType();
if (base != null && base.getBaseType() != null) {
length = currentOrEmpty(binary.getLengthConstraints(), base.getLengthConstraints());
} else {
length = binary.getLengthConstraints();
}
pattern = ImmutableList.of();
range = ImmutableList.of();
} else if (type instanceof DecimalTypeDefinition) {
length = ImmutableList.of();
pattern = ImmutableList.of();
final DecimalTypeDefinition decimal = (DecimalTypeDefinition) type;
final DecimalTypeDefinition base = decimal.getBaseType();
if (base != null && base.getBaseType() != null) {
range = currentOrEmpty(decimal.getRangeConstraints(), base.getRangeConstraints());
} else {
range = decimal.getRangeConstraints();
}
} else if (type instanceof IntegerTypeDefinition) {
length = ImmutableList.of();
pattern = ImmutableList.of();
final IntegerTypeDefinition integer = (IntegerTypeDefinition) type;
final IntegerTypeDefinition base = integer.getBaseType();
if (base != null && base.getBaseType() != null) {
range = currentOrEmpty(integer.getRangeConstraints(), base.getRangeConstraints());
} else {
range = integer.getRangeConstraints();
}
} else if (type instanceof StringTypeDefinition) {
final StringTypeDefinition string = (StringTypeDefinition) type;
final StringTypeDefinition base = string.getBaseType();
if (base != null && base.getBaseType() != null) {
length = currentOrEmpty(string.getLengthConstraints(), base.getLengthConstraints());
} else {
length = string.getLengthConstraints();
}
pattern = uniquePatterns(string);
range = ImmutableList.of();
} else if (type instanceof UnsignedIntegerTypeDefinition) {
length = ImmutableList.of();
pattern = ImmutableList.of();
final UnsignedIntegerTypeDefinition unsigned = (UnsignedIntegerTypeDefinition) type;
final UnsignedIntegerTypeDefinition base = unsigned.getBaseType();
if (base != null && base.getBaseType() != null) {
range = currentOrEmpty(unsigned.getRangeConstraints(), base.getRangeConstraints());
} else {
range = unsigned.getRangeConstraints();
}
} else {
length = ImmutableList.of();
pattern = ImmutableList.of();
range = ImmutableList.of();
}
// Now, this may have ended up being empty, too...
if (length.isEmpty() && pattern.isEmpty() && range.isEmpty()) {
return EMPTY_RESTRICTIONS;
}
// Nope, not empty allocate a holder
return new Restrictions() {
@Override
public List<RangeConstraint> getRangeConstraints() {
return range;
}
@Override
public List<PatternConstraint> getPatternConstraints() {
return pattern;
}
@Override
public List<LengthConstraint> getLengthConstraints() {
return length;
}
@Override
public boolean isEmpty() {
return false;
}
};
}