com.databricks.jdbc.core.converters.AbstractObjectConverter Maven / Gradle / Ivy

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Databricks JDBC Driver.
There is a newer version: 2.6.40-patch-1
package com.databricks.jdbc.core.converters;

import com.databricks.jdbc.core.DatabricksSQLException;
import java.io.*;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.sql.Date;
import java.sql.Timestamp;
import java.time.LocalDate;

public abstract class AbstractObjectConverter {

  // TODO (Madhav): Ensure proper handling of null values in the conversions.
  long[] POWERS_OF_TEN = {
    1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000
  };

  int DEFAULT_TIMESTAMP_SCALE = 3;
  Object object;

  AbstractObjectConverter(Object object) throws DatabricksSQLException {
    this.object = object;
  }

  public byte convertToByte() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public short convertToShort() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public int convertToInt() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public long convertToLong() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public float convertToFloat() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public double convertToDouble() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public BigDecimal convertToBigDecimal() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public BigInteger convertToBigInteger() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public LocalDate convertToLocalDate() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public boolean convertToBoolean() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public byte[] convertToByteArray() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public char convertToChar() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public String convertToString() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public Timestamp convertToTimestamp() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public Timestamp convertToTimestamp(int scale) throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public Date convertToDate() throws DatabricksSQLException {
    throw new DatabricksSQLException("Unsupported conversion operation");
  }

  public InputStream convertToBinaryStream() throws DatabricksSQLException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    try {
      ObjectOutputStream out = new ObjectOutputStream(bos);
      out.writeObject(object);
      out.flush();
    } catch (IOException e) {
      throw new DatabricksSQLException(
          "Could not convert object to binary stream " + object.toString(), e);
    }
    byte[] objectBytes = bos.toByteArray();
    return new ByteArrayInputStream(objectBytes);
  }

  public InputStream convertToUnicodeStream() throws DatabricksSQLException {
    String stringRepresentation = this.convertToString();
    return new ByteArrayInputStream(stringRepresentation.getBytes(StandardCharsets.UTF_8));
  }

  public InputStream convertToAsciiStream() throws DatabricksSQLException {
    String stringRepresentation = this.convertToString();
    byte[] asciiBytes = stringRepresentation.getBytes(StandardCharsets.US_ASCII);
    return new ByteArrayInputStream(asciiBytes);
  }

  public Reader convertToCharacterStream() throws DatabricksSQLException {
    String stringRepresentation = this.convertToString();
    return new StringReader(stringRepresentation);
  }
}