exec/java-exec/src/main/java/org/apache/drill/exec/store/mock/MockStorageEngine.java


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/**
 * 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.drill.exec.store.mock;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import net.hydromatic.optiq.SchemaPlus;

import org.apache.drill.common.JSONOptions;
import org.apache.drill.common.expression.SchemaPath;
import org.apache.drill.common.logical.StoragePluginConfig;
import org.apache.drill.exec.physical.base.AbstractGroupScan;
import org.apache.drill.exec.rpc.user.DrillUser;
import org.apache.drill.exec.rpc.user.UserSession;
import org.apache.drill.exec.server.DrillbitContext;
import org.apache.drill.exec.store.AbstractStoragePlugin;
import org.apache.drill.exec.store.mock.MockGroupScanPOP.MockScanEntry;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;

public class MockStorageEngine extends AbstractStoragePlugin {
  static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(MockStorageEngine.class);

  private final MockStorageEngineConfig configuration;

  public MockStorageEngine(MockStorageEngineConfig configuration, DrillbitContext context, String name) {
    this.configuration = configuration;
  }

  @Override
  public AbstractGroupScan getPhysicalScan(JSONOptions selection, List<SchemaPath> columns) throws IOException {

    ArrayList<MockScanEntry> readEntries = selection.getListWith(new ObjectMapper(),
        new TypeReference<ArrayList<MockScanEntry>>() {
        });

    return new MockGroupScanPOP(null, readEntries);
  }

  @Override
  public void registerSchemas(UserSession session, SchemaPlus parent) {
  }

  @Override
  public StoragePluginConfig getConfig() {
    return configuration;
  }


}