src/main/java/org/mariadb/jdbc/client/column/UuidColumn.java

// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (c) 2012-2014 Monty Program Ab
// Copyright (c) 2015-2021 MariaDB Corporation Ab

package org.mariadb.jdbc.client.column;

import java.sql.*;
import java.util.Calendar;
import java.util.UUID;
import org.mariadb.jdbc.Configuration;
import org.mariadb.jdbc.client.ColumnDecoder;
import org.mariadb.jdbc.client.DataType;
import org.mariadb.jdbc.client.ReadableByteBuf;
import org.mariadb.jdbc.message.server.ColumnDefinitionPacket;
import org.mariadb.jdbc.util.CharsetEncodingLength;

/** Column metadata definition */
public class UuidColumn extends ColumnDefinitionPacket implements ColumnDecoder {

  /**
   * UUID metadata type decoder
   *
   * @param buf buffer
   * @param charset charset
   * @param length maximum data length
   * @param dataType data type. see https://mariadb.com/kb/en/result-set-packets/#field-types
   * @param decimals decimal length
   * @param flags flags. see https://mariadb.com/kb/en/result-set-packets/#field-details-flag
   * @param stringPos string offset position in buffer
   * @param extTypeName extended type name
   * @param extTypeFormat extended type format
   */
  public UuidColumn(
      ReadableByteBuf buf,
      int charset,
      long length,
      DataType dataType,
      byte decimals,
      int flags,
      int[] stringPos,
      String extTypeName,
      String extTypeFormat) {
    super(buf, charset, length, dataType, decimals, flags, stringPos, extTypeName, extTypeFormat);
  }

  public String defaultClassname(Configuration conf) {
    return conf.uuidAsString() ? String.class.getName() : UUID.class.getName();
  }

  public int getColumnType(Configuration conf) {
    return conf.uuidAsString() ? Types.CHAR : Types.OTHER;
  }

  public String getColumnTypeName(Configuration conf) {
    return "uuid";
  }

  public int getPrecision() {
    Integer maxWidth = CharsetEncodingLength.maxCharlen.get(charset);
    if (maxWidth == null) {
      return (int) columnLength;
    }
    return (int) (columnLength / maxWidth);
  }

  @Override
  public Object getDefaultText(final Configuration conf, ReadableByteBuf buf, int length)
      throws SQLDataException {
    return conf.uuidAsString() ? buf.readString(length) : UUID.fromString(buf.readAscii(length));
  }

  @Override
  public Object getDefaultBinary(final Configuration conf, ReadableByteBuf buf, int length)
      throws SQLDataException {
    return conf.uuidAsString() ? buf.readString(length) : UUID.fromString(buf.readAscii(length));
  }

  @Override
  public boolean decodeBooleanText(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Boolean");
  }

  @Override
  public boolean decodeBooleanBinary(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Boolean");
  }

  @Override
  public byte decodeByteText(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as byte");
  }

  @Override
  public byte decodeByteBinary(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as byte");
  }

  @Override
  public String decodeStringText(ReadableByteBuf buf, int length, Calendar cal)
      throws SQLDataException {
    return buf.readString(length);
  }

  @Override
  public String decodeStringBinary(ReadableByteBuf buf, int length, Calendar cal)
      throws SQLDataException {
    return buf.readString(length);
  }

  @Override
  public short decodeShortText(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Short");
  }

  @Override
  public short decodeShortBinary(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Short");
  }

  @Override
  public int decodeIntText(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Integer");
  }

  @Override
  public int decodeIntBinary(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Integer");
  }

  @Override
  public long decodeLongText(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Long");
  }

  @Override
  public long decodeLongBinary(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Long");
  }

  @Override
  public float decodeFloatText(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Float");
  }

  @Override
  public float decodeFloatBinary(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Float");
  }

  @Override
  public double decodeDoubleText(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Double");
  }

  @Override
  public double decodeDoubleBinary(ReadableByteBuf buf, int length) throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Double");
  }

  @Override
  public Date decodeDateText(ReadableByteBuf buf, int length, Calendar cal)
      throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Date");
  }

  @Override
  public Date decodeDateBinary(ReadableByteBuf buf, int length, Calendar cal)
      throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Date");
  }

  @Override
  public Time decodeTimeText(ReadableByteBuf buf, int length, Calendar cal)
      throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Time");
  }

  @Override
  public Time decodeTimeBinary(ReadableByteBuf buf, int length, Calendar calParam)
      throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Time");
  }

  @Override
  public Timestamp decodeTimestampText(ReadableByteBuf buf, int length, Calendar calParam)
      throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Timestamp");
  }

  @Override
  public Timestamp decodeTimestampBinary(ReadableByteBuf buf, int length, Calendar calParam)
      throws SQLDataException {
    buf.skip(length);
    throw new SQLDataException("Data type UUID cannot be decoded as Timestamp");
  }
}