ASF_20_SRC_AUTO/src/blocks/authentication-fw/java/org/apache/cocoon/webapps/authentication/acting/LoginAction.java

/*
 * Copyright 1999-2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.cocoon.webapps.authentication.acting;

import java.util.Map;

import org.apache.avalon.framework.parameters.Parameters;
import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.acting.ServiceableAction;
import org.apache.cocoon.environment.Redirector;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.webapps.authentication.AuthenticationManager;
import org.apache.cocoon.webapps.authentication.user.UserHandler;
import org.apache.excalibur.source.SourceParameters;

/**
 *  This action logs the current user into a given handler. If the
 *  authentication is successful, a map is returned with the authentication
 *  information and a session is created (if it not already exists).
 *  If the authentication is not successful, the error information is stored
 *  into the temporary context.
 *
 * @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a>
 * @version CVS $Id: LoginAction.java,v 1.4 2004/03/05 13:01:40 bdelacretaz Exp $
*/
public final class LoginAction
extends ServiceableAction
implements ThreadSafe {

    public Map act(Redirector redirector,
                   SourceResolver resolver,
                   Map objectModel,
                   String source,
                   Parameters par)
    throws Exception {
        if (this.getLogger().isDebugEnabled() ) {
            this.getLogger().debug("BEGIN act resolver="+resolver+
                                   ", objectModel="+objectModel+
                                   ", source="+source+
                                   ", par="+par);
        }

        final String handlerName = par.getParameter("handler", null);
        if ( handlerName == null ) {
            throw new ProcessingException("LoginAction requires at least the handler parameter.");
        }

        // build authentication parameters
        SourceParameters authenticationParameters = new SourceParameters();
        String[] enum = par.getNames();
        if (enum != null) {
            for(int i = 0; i < enum.length; i++) {
                final String key = enum[i];
                if ( key.startsWith("parameter_") ) {
                    authenticationParameters.setParameter( key.substring("parameter_".length()),
                                                           par.getParameter(key));
                }
            }

        }

        Map map = null;

        // authenticate
        AuthenticationManager authManager = null;
        try {
            authManager = (AuthenticationManager) this.manager.lookup(AuthenticationManager.ROLE);
            UserHandler handler = authManager.login( handlerName, 
                                       par.getParameter("application", null),
                                       authenticationParameters);
            if ( handler != null) {
                // success
                map = handler.getContext().getContextInfo();

            }
        } finally {
            this.manager.release( authManager);
        }

        if (this.getLogger().isDebugEnabled() ) {
            this.getLogger().debug("END act map="+map);
        }

        return map;
    }

}