1.3. UUIDv3

Name-based UUID with MD5 hashing

Creating a Name-based UUID:

String name = "https://github.com/";
UUID uuid = UuidCreator.getNameBasedMd5(UuidNamespace.NAMESPACE_URL, name);

List of predefined namespaces:

• UuidNamespace.NAMESPACE_DNS: Name string is a fully-qualified domain name;
• UuidNamespace.NAMESPACE_URL: Name string is a URL;
• UuidNamespace.NAMESPACE_ISO_OID: Name string is an ISO Object ID;
• UuidNamespace.NAMESPACE_X500_DN: Name string is an X.500 Distinguished Name (in DER or a text output format).

More examples

A name-based factory that uses a unique namespace defined for the application:

    // a random unique namespace for the application
    UUID namespace = UUID.fromString("b86919b5-d2b1-455e-8ef5-b752f3fa8416");

    // a name-based factory that uses the unique namespace
    NameBasedMd5Factory factory = new NameBasedMd5Factory(namespace);

    // use the factory as many times as needed
    UUID uuid = factory.create("This is a test string");