/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.hadoop.gateway.identityasserter.common.function;
import org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriteEnvironment;
import org.apache.hadoop.gateway.filter.rewrite.spi.UrlRewriteContext;
import org.apache.hadoop.gateway.filter.rewrite.spi.UrlRewriteFunctionProcessor;
import org.apache.hadoop.gateway.filter.security.AbstractIdentityAssertionBase;
import org.apache.hadoop.gateway.i18n.GatewaySpiMessages;
import org.apache.hadoop.gateway.i18n.messages.MessagesFactory;
import org.apache.hadoop.gateway.security.SubjectUtils;
import javax.security.auth.Subject;
import java.security.AccessController;
import java.util.ArrayList;
import java.util.List;
public class UsernameFunctionProcessor
implements UrlRewriteFunctionProcessor<UsernameFunctionDescriptor> {
private static final GatewaySpiMessages LOG = MessagesFactory.get( GatewaySpiMessages.class );
// private PrincipalMapper mapper = null;
@Override
public String name() {
return UsernameFunctionDescriptor.FUNCTION_NAME;
}
@Override
public void initialize( UrlRewriteEnvironment environment, UsernameFunctionDescriptor descriptor ) throws Exception {
// if( environment != null ) {
// GatewayServices services = environment.getAttribute( GatewayServices.GATEWAY_SERVICES_ATTRIBUTE );
// if( services != null ) {
// mapper = (PrincipalMapper)services.getService( "PrincipalMapperService" /*GatewayServices.PRINCIPAL_MAPPER_SERVICE*/ );
// }
// }
}
@Override
public void destroy() throws Exception {
}
@Override
public List<String> resolve( UrlRewriteContext context, List<String> parameters ) throws Exception {
List<String> results = null;
Subject subject = SubjectUtils.getCurrentSubject( );
if( subject != null ) {
results = new ArrayList<String>( 1 );
String username = SubjectUtils.getEffectivePrincipalName(subject);
results.add( username );
} else if( parameters != null && parameters.size() > 0 ) {
results = new ArrayList<String>( 1 );
results.add( parameters.get( 0 ) );
}
return results;
}
}