/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/**
 * The nsIComponentRegistrar interface.
 */

#include "nsISupports.idl"

interface nsIFile;
interface nsIFactory;
interface nsISimpleEnumerator;

[scriptable, uuid(2417cbfe-65ad-48a6-b4b6-eb84db174392)]
interface nsIComponentRegistrar : nsISupports
{
    /**
     * autoRegister
     *
     * Register a .manifest file, or an entire directory containing
     * these files. Registration lasts for this run only, and is not cached.
     *
     * @note Formerly this method would register component files directly. This
     *       is no longer supported.
     */
    void autoRegister(in nsIFile aSpec);

    /**
     * autoUnregister
     * @status OBSOLETE: This method is no longer implemented, but preserved
     *                   in this interface for binary compatibility with
     *                   Mozilla 1.9.2.
     */
    void autoUnregister(in nsIFile aSpec);


    /**
     * registerFactory
     *
     * Register a factory with a given ContractID, CID and Class Name.
     *
     * @param aClass      : CID of object
     * @param aClassName  : Class Name of CID (unused)
     * @param aContractID : ContractID associated with CID aClass. May be null
     *                      if no contract ID is needed.
     * @param aFactory    : Factory that will be registered for CID aClass.
     *                      If aFactory is null, the contract will be associated
     *                      with a previously registered CID.
     */
    void registerFactory(in nsCIDRef aClass, 
                         in string aClassName,
                         in string aContractID, 
                         in nsIFactory aFactory);

    /**
     * unregisterFactory
     *
     * Unregister a factory associated with CID aClass.
     *
     * @param aClass   : CID being unregistered
     * @param aFactory : Factory previously registered to create instances of
     *                   CID aClass.
     *
     * @throws NS_ERROR* Method failure.
     */    
    void unregisterFactory(in nsCIDRef aClass, 
                           in nsIFactory aFactory);

    /**
     * registerFactoryLocation
     * @status OBSOLETE: This method is no longer implemented, but preserved
     *                   in this interface for binary compatibility with
     *                   Mozilla 1.9.2.
     */
    void registerFactoryLocation(in nsCIDRef aClass, 
                                 in string aClassName,
                                 in string aContractID, 
                                 in nsIFile aFile,
                                 in string aLoaderStr, 
                                 in string aType);

    /**
     * unregisterFactoryLocation
     * @status OBSOLETE: This method is no longer implemented, but preserved
     *                   in this interface for binary compatibility with
     *                   Mozilla 1.9.2.
     */    
    void unregisterFactoryLocation(in nsCIDRef aClass, 
                                   in nsIFile aFile);

    /**
     * isCIDRegistered
     *
     * Returns true if a factory is registered for the CID.
     *
     * @param aClass : CID queried for registeration
     * @return       : true if a factory is registered for CID 
     *                 false otherwise.
     */
    boolean isCIDRegistered(in nsCIDRef aClass);
    
    /**
     * isContractIDRegistered
     *
     * Returns true if a factory is registered for the contract id.
     *
     * @param aClass : contract id queried for registeration
     * @return       : true if a factory is registered for contract id 
     *                 false otherwise.
     */
    boolean isContractIDRegistered(in string aContractID);

    /**
     * enumerateCIDs
     *
     * Enumerate the list of all registered CIDs.
     *
     * @return : enumerator for CIDs.  Elements of the enumeration can be QI'ed
     *           for the nsISupportsID interface.  From the nsISupportsID, you 
     *           can obtain the actual CID.
     */
    nsISimpleEnumerator enumerateCIDs();

    /**
     * enumerateContractIDs
     *
     * Enumerate the list of all registered ContractIDs.
     *
     * @return : enumerator for ContractIDs. Elements of the enumeration can be 
     *           QI'ed for the nsISupportsCString interface.  From  the
     *           nsISupportsCString interface, you can obtain the actual 
     *           Contract ID string.
     */
    nsISimpleEnumerator enumerateContractIDs();

    /**
     * CIDToContractID
     * @status OBSOLETE: This method is no longer implemented, but preserved
     *                   in this interface for binary compatibility with
     *                   Mozilla 1.9.2.
     */
    string   CIDToContractID(in nsCIDRef aClass);

    /**
     * contractIDToCID
     *
     * Returns the CID for a given Contract ID, if one exists and is registered.
     *
     * @return : Contract ID.
     */
    nsCIDPtr contractIDToCID(in string aContractID);
};