package net.deterlab.abac;

import java.io.*;

import java.util.*;


/**
 * XXX:
 * An ABAC credential, with or without an underlying certificate that
 * represents it.  These are edges in proof graphs and can be constructed from
 * their constituent Roles.
 * @author <a href="http://abac.deterlab.net">ISI ABAC team</a>
 * @version 1.3
 */
public class CredentialFactory {
    // XXX register and extend
    static Credential[] newInstance(File fn, Set<Identity> ids) {
	Credential rv = null;
	try {
	    rv = new X509Credential(fn, ids);
	}
	catch (Exception e ) {
	    rv = null;
	}
	try {
	    rv = new GENICredential(fn, ids);
	}
	catch (Exception e ) {
	    rv = null;
	}
	if ( rv != null ) 
	    return new Credential[] { rv };
	else 
	    return null;
    }
    static Credential[] newInstance(String fn, Set<Identity> ids) {
	return newInstance(new File(fn), ids);
    }
}