io.prestosql.parquet.writer.ColumnWriter Maven / Gradle / Ivy

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/*
 * 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 io.prestosql.parquet.writer;

import org.apache.parquet.format.ColumnMetaData;

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

import static java.util.Objects.requireNonNull;

public interface ColumnWriter
{
    void writeBlock(ColumnChunk columnChunk)
            throws IOException;

    void close();

    List getBuffer()
            throws IOException;

    long getBufferedBytes();

    long getRetainedBytes();

    void reset();

    class BufferData
    {
        private final ColumnMetaData metaData;
        private final List data;

        public BufferData(List data, ColumnMetaData metaData)
        {
            this.data = requireNonNull(data, "data is null");
            this.metaData = requireNonNull(metaData, "metaData is null");
        }

        public ColumnMetaData getMetaData()
        {
            return metaData;
        }

        public List getData()
        {
            return data;
        }
    }
}