com.github.housepower.data.ColumnWriterBuffer 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 com.github.housepower.data;

import com.github.housepower.buffer.ByteArrayWriter;
import com.github.housepower.serde.BinarySerializer;
import com.github.housepower.settings.ClickHouseDefines;

import java.io.IOException;
import java.nio.ByteBuffer;

public class ColumnWriterBuffer {

    private final ByteArrayWriter columnWriter;

    public final BinarySerializer column;

    public ColumnWriterBuffer() {
        this.columnWriter = new ByteArrayWriter(ClickHouseDefines.COLUMN_BUFFER_BYTES);
        this.column = new BinarySerializer(columnWriter, false);
    }

    public void writeTo(BinarySerializer serializer) throws IOException {
        for (ByteBuffer buffer : columnWriter.getBufferList()) {
            serializer.writeBytes(buffer.array(), buffer.arrayOffset(), buffer.position());
            // put buffer into state matching original flip() + relative get() behaviour; likely unnecessary
            buffer.limit(buffer.position());
        }
    }

    public void reset() {
        columnWriter.reset();
    }
}