Returns a descriptor which is equal to this descriptor.

 

Returns a descriptor which is equal to this descriptor. Changes to the returned descriptor will have no effect on this descriptor, and vice versa.

This method returns the object on which it is called. A subclass can override it to return another object provided the contract is respected.
Throws:
- RuntimeOperationsException - for illegal value for field Names or field Values. If the descriptor construction fails for any reason, this exception will be thrown.

  Compares this descriptor to the given object.

  Compares this descriptor to the given object. The objects are equal if
the given object is also a Descriptor, and if the two Descriptors have
the same field names (possibly differing in case) and the same
associated values. The respective values for a field in the two
Descriptors are equal if the following conditions hold:

• If one value is null then the other must be too.


• If one value is a primitive array then the other must be a primitive
  array of the same type with the same elements.


• If one value is an object array then the other must be too and
  Arrays.deepEquals(Object[],Object[]) must return true.


• Otherwise Object.equals(Object) must return true.

Returns: {@code true} if the objects are the same; {@code false} otherwise.
Parameters:
- o - the object to compare with.

  Returns the hash code value for this descriptor.

 

Returns the hash code value for this descriptor. The hash code is computed as the sum of the hash codes for each field in the descriptor. The hash code of a field with name n and value v is n.toLowerCase().hashCode() ^ h. Here h is the hash code of v, computed as follows:

• If v is null then h is 0.
• If v is a primitive array then h is computed using the appropriate overloading of java.util.Arrays.hashCode.
• If v is an object array then h is computed using Arrays.deepHashCode(Object[]).
• Otherwise h is v.hashCode().

Returns: A hash code value for this object.

  Returns true if all of the fields have legal values given their names.

  Returns true if all of the fields have legal values given their
names. This method always returns true, but a subclass can
override it to return false when appropriate.
Returns: true if the values are legal.
Throws:
- RuntimeOperationsException - if the validity checking fails. The method returns false if the descriptor is not valid, but throws this exception if the attempt to determine validity fails.

  Removes a field from the descriptor.

  Removes a field from the descriptor.
Parameters:
- fieldName - String name of the field to be removed. If the field name is illegal or the field is not found, no exception is thrown.
Throws:
- RuntimeOperationsException - if a field of the given name exists and the descriptor is immutable. The wrapped exception will be an {@link UnsupportedOperationException}.

  This operation is unsupported since this class is immutable.

  This operation is unsupported since this class is immutable. If
this call would change a mutable descriptor with the same contents,
then a RuntimeOperationsException wrapping an
UnsupportedOperationException is thrown. Otherwise,
the behavior is the same as it would be for a mutable descriptor:
either an exception is thrown because of illegal parameters, or
there is no effect.

  This operation is unsupported since this class is immutable.

  This operation is unsupported since this class is immutable. If
this call would change a mutable descriptor with the same contents,
then a RuntimeOperationsException wrapping an
UnsupportedOperationException is thrown. Otherwise,
the behavior is the same as it would be for a mutable descriptor:
either an exception is thrown because of illegal parameters, or
there is no effect.

  Return an ImmutableDescriptor whose contents are the union of the given descriptors.

 

Return an ImmutableDescriptor whose contents are the union of the given descriptors. Every field name that appears in any of the descriptors will appear in the result with the value that it has when the method is called. Subsequent changes to any of the descriptors do not affect the ImmutableDescriptor returned here.

In the simplest case, there is only one descriptor and the returned ImmutableDescriptor is a copy of its fields at the time this method is called:

 Descriptor d = something();
 ImmutableDescriptor copy = ImmutableDescriptor.union(d);
 

Returns: an {@code ImmutableDescriptor} that is the union of the given descriptors. The returned object may be identical to one of the input descriptors if it is an ImmutableDescriptor that contains all of the required fields.
Parameters:
- descriptors - the descriptors to be combined. Any of the descriptors can be null, in which case it is skipped.
Throws:
- IllegalArgumentException - if two Descriptors contain the same field name with different associated values. Primitive array values are considered the same if they are of the same type with the same elements. Object array values are considered the same if {@link Arrays#deepEquals(Object[],Object[])} returns true.