/*
* 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 com.facebook.presto.hive.parquet.predicate;
import parquet.column.ColumnDescriptor;
import parquet.column.statistics.Statistics;
import java.util.Map;
public interface ParquetPredicate
{
ParquetPredicate TRUE = new ParquetPredicate()
{
@Override
public boolean matches(long numberOfRows, Map<ColumnDescriptor, Statistics<?>> statistics)
{
return true;
}
@Override
public boolean matches(Map<ColumnDescriptor, ParquetDictionaryDescriptor> dictionaries)
{
return true;
}
};
/**
* Should the Parquet Reader process a file section with the specified statistics.
*
* @param numberOfRows the number of rows in the segment; this can be used with
* Statistics to determine if a column is only null
* @param statistics column statistics
*/
boolean matches(long numberOfRows, Map<ColumnDescriptor, Statistics<?>> statistics);
/**
* Should the Parquet Reader process a file section with the specified dictionary.
*
* @param dictionaries dictionaries per column
*/
boolean matches(Map<ColumnDescriptor, ParquetDictionaryDescriptor> dictionaries);
}