import java.io.Serializable;
import java.security.Principal;
import java.util.Collection;

/**
 * Principal - a simple, serializable Principal.
 *
 * @author Chris Schultz (chris@christopherschultz.net)
 */
public class SimplePrincipal
    implements Principal, Serializable
{
    private String _name;
    private Collection _roles;

    // TODO: Should this be public or not?
    public SimplePrincipal(String name, Collection roles) {
	_name = name;

	_roles = roles;
    }

    /**
     * Returns the name of this principal.
     *
     * @return the name of this principal.
     */
    public String getName() {
	return _name;
    }

    public boolean isInRole(String rolename)
    {
	return (_roles != null && _roles.contains(rolename));
    }

    /**
     * Compares this principal to the specified object.
     *
     * @param obj object to compare with.
     *
     * @return true if the object passed in is a SimplePrincipal with the
     *         same name.
     */
    public boolean equals(Object o)
    {
	return (o instanceof Principal)
	    && _name.equals(((Principal)o).getName());
    }

    /**
     * Returns a string representation of this principal.
     *
     * @return a string representation of this principal.
     */
    public String toString() {
	return "SimplePrincipal[name = \'" + _name + "\'"
	    + ", roles=" + _roles + "]";
    }

    /**
     * Returns a hashcode for this principal.
     *
     * @return a hashcode for this principal.
     */
    public int hashCode() {
	return _name.hashCode();
    }
}