s1890: restored getIdentities returning a set of Principals of a given class.

package ca.nrc.cadc.ac;

import ca.nrc.cadc.auth.HttpPrincipal;

import ca.nrc.cadc.auth.NumericPrincipal;

import org.json.HTTP;

import java.security.Principal;

        return identities;

    }

    public <S extends Principal> S getPrincipal(Class<S> clazz)

    /**

     * Obtain a set of identities whose type match the given one.

     *

     * @param identityClass     The class to search on.

     * @param <S>               The Principal type.

     * @return                  Set of matched identities, or empty Set.

     *                          Never null.

     */

    public <S extends Principal> Set<S> getIdentities(final Class<S> identityClass)

    {

        for (Principal principal : getIdentities())

        final Set<S> matchedIdentities = new HashSet<S>();

        for (final Principal p : identities)

        {

            if (principal.getClass() == clazz)

            if (p.getClass() == identityClass)

            {

                return (S) principal;

                // This casting shouldn't happen, but it's the only way to

                // do this without a lot of work.

                // jenkinsd 2014.09.26

                matchedIdentities.add((S) p);

            }

        }

        return null;

        return matchedIdentities;

    }

    public HttpPrincipal getHttpPrincipal()

    {

        return getPrincipal(HttpPrincipal.class);

        Set<HttpPrincipal> identities = getIdentities(HttpPrincipal.class);

        if (!identities.isEmpty())

        {

            return identities.iterator().next();

        }

        return null;

    }

    /* (non-Javadoc)