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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.parquet.column.page;

import org.apache.parquet.column.ColumnDescriptor;

/**
 * Interface to read dictionary pages for all the columns of a row group
 */
public interface DictionaryPageReadStore {

  /**
   * Returns a {@link DictionaryPage} for the given column descriptor.
   * The dictionary page bytes are uncompressed.
   *
   * @param descriptor the descriptor of the column
   * @return the DictionaryPage for that column, or null if there isn't one
   */
  DictionaryPage readDictionaryPage(ColumnDescriptor descriptor);
}




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