Returns an iteration of the {@code CertPath} encodings supportedby this certificate factory, with the default encoding first. See the CertPath Encodings section in the
Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard encoding names.
Attempts to modify the returned {@code Iterator} via its{@code remove} method result in an{@code UnsupportedOperationException}.
This method was added to version 1.4 of the Java 2 Platform Standard Edition. In order to maintain backwards compatibility with existing service providers, this method cannot be {@code abstract}and by default throws an {@code UnsupportedOperationException}.
@return an {@code Iterator} over the names of the supported{@code CertPath} encodings (as {@code String}s)
@exception UnsupportedOperationException if the method is not supported
@since 1.4