sentry-provider/sentry-provider-common/src/main/java/org/apache/sentry/provider/common/ProviderBackend.java

/*
 * 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.sentry.provider.common;

import javax.annotation.Nullable;

import java.util.List;

import org.apache.sentry.core.common.SentryConfigurationException;
import org.apache.sentry.policy.common.RoleValidator;

import com.google.common.collect.ImmutableSet;

/**
 * Interface for getting roles from a specific provider backend.
 */
public interface ProviderBackend {
  /**
   * Process roles from the backend.  Checks the validity of each role
   * by running it through each validator passed via validators.
   */
  public void process(List<? extends RoleValidator> validators);

  /**
   * Get the roles from the backend.  Requires that process(...) is invoked at
   * least once prior.
   */
  public Roles getRoles();

  public void validatePolicy(List<? extends RoleValidator> validators, boolean strictValidation)
      throws SentryConfigurationException;
}