NoOpDatasetContext.java

/*
 * Copyright © 2016 Cask Data, Inc.
 *
 * 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 co.cask.cdap.security.authorization;

import co.cask.cdap.api.data.DatasetContext;
import co.cask.cdap.api.data.DatasetInstantiationException;
import co.cask.cdap.api.dataset.Dataset;

import java.util.Map;

/**
 * A no-op implementation of {@link DatasetContext} for use in unit tests.
 */
public class NoOpDatasetContext implements DatasetContext {
  @Override
  public <T extends Dataset> T getDataset(String name) throws DatasetInstantiationException {
    throw new DatasetInstantiationException("NoOpDatasetContext cannot instantiate datasets");
  }

  @Override
  public <T extends Dataset> T getDataset(String name, Map<String, String> arguments)
    throws DatasetInstantiationException {
    throw new DatasetInstantiationException("NoOpDatasetContext cannot instantiate datasets");
  }

  @Override
  public void releaseDataset(Dataset dataset) {

  }

  @Override
  public void discardDataset(Dataset dataset) {

  }
}