com.clickhouse.client.api.data_formats.RowBinaryFormatReader Maven / Gradle / Ivy

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New client api for ClickHouse

There is a newer version: 0.7.0

package com.clickhouse.client.api.data_formats;

import com.clickhouse.client.api.data_formats.internal.AbstractBinaryFormatReader;
import com.clickhouse.client.api.metadata.TableSchema;
import com.clickhouse.client.api.query.QuerySettings;
import com.clickhouse.data.ClickHouseColumn;

import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;

public class RowBinaryFormatReader extends AbstractBinaryFormatReader {

    public RowBinaryFormatReader(InputStream inputStream, TableSchema schema) {
        this(inputStream, null, schema);
    }

    public RowBinaryFormatReader(InputStream inputStream, QuerySettings querySettings, TableSchema schema) {
        super(inputStream, querySettings, schema);
        readNextRecord();
    }

    @Override
    public boolean readRecord(Map record) throws IOException {
        boolean firstColumn = true;
        for (ClickHouseColumn column : getSchema().getColumns()) {
            try {
                Object val = binaryStreamReader.readValue(column);
                if (val != null) {
                    record.put(column.getColumnName(),val);
                }
                firstColumn = false;
            } catch (EOFException e) {
                if (firstColumn) {
                    endReached();
                    return false;
                }
                throw e;
            }
        }
        return true;
    }
}