exec/java-exec/src/main/java/org/apache/drill/exec/store/PartitionExplorerImpl.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.drill.exec.store;

import org.apache.calcite.schema.SchemaPlus;

import java.util.List;

public class PartitionExplorerImpl implements PartitionExplorer {

  private final SchemaPlus rootSchema;

  public PartitionExplorerImpl(SchemaPlus rootSchema) {
    this.rootSchema = rootSchema;
  }

  @Override
  public Iterable<String> getSubPartitions(String schema,
                                           String table,
                                           List<String> partitionColumns,
                                           List<String> partitionValues
                                           ) throws PartitionNotFoundException {

    AbstractSchema subSchema = rootSchema.getSubSchema(schema.toLowerCase()).unwrap(AbstractSchema.class);
    return subSchema.getSubPartitions(table, partitionColumns, partitionValues);
  }
}