Examples with MCRPersistentUniformResourceLocator org.mycore.pi.purl.MCRPersistentUniformResourceLocator used on opensource projects

Example 1 with MCRPersistentUniformResourceLocator

use of org.mycore.pi.purl.MCRPersistentUniformResourceLocator in project mycore by MyCoRe-Org.

the class MCRMODSPURLPersistentIdentifierMetadataManager method getIdentifier.

@Override
public Optional<MCRPersistentIdentifier> getIdentifier(MCRBase obj, String additional) throws MCRPersistentIdentifierException {
    MCRObject object = checkObject(obj);
    MCRMODSWrapper wrapper = new MCRMODSWrapper(object);
    Element element = wrapper.getElement(MODS_IDENTIFIER_TYPE_PURL);
    if (element == null) {
        return Optional.empty();
    }
    String purlString = element.getTextNormalize();
    try {
        return Optional.of(new MCRPersistentUniformResourceLocator(new URL(purlString)));
    } catch (MalformedURLException e) {
        return Optional.empty();
    }
}