content: /*
   * 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.cassandra.auth;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.cql3.functions.UDAggregate;
  import org.apache.cassandra.cql3.functions.UDFunction;
  import org.apache.cassandra.schema.KeyspaceMetadata;
  import org.apache.cassandra.schema.SchemaChangeListener;
  import org.apache.cassandra.schema.TableMetadata;
  
  /**
   * SchemaChangeListener implementation that cleans up permissions on dropped resources.
   */
  public class AuthSchemaChangeListener implements SchemaChangeListener
  {
      @Override
      public void onDropKeyspace(KeyspaceMetadata keyspace, boolean dropData)
      {
          DatabaseDescriptor.getAuthorizer().revokeAllOn(DataResource.keyspace(keyspace.name));
          DatabaseDescriptor.getAuthorizer().revokeAllOn(DataResource.allTables(keyspace.name));
          DatabaseDescriptor.getAuthorizer().revokeAllOn(FunctionResource.keyspace(keyspace.name));
      }
  
      @Override
      public void onDropTable(TableMetadata table, boolean dropData)
      {
          DatabaseDescriptor.getAuthorizer().revokeAllOn(DataResource.table(table.keyspace, table.name));
      }
  
      @Override
      public void onDropFunction(UDFunction function)
      {
          DatabaseDescriptor.getAuthorizer()
                            .revokeAllOn(FunctionResource.function(function.name().keyspace, function.name().name, function.argTypes()));
      }
  
      @Override
      public void onDropAggregate(UDAggregate aggregate)
      {
          DatabaseDescriptor.getAuthorizer()
                            .revokeAllOn(FunctionResource.function(aggregate.name().keyspace, aggregate.name().name, aggregate.argTypes()));
      }
  }
  