| // 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.math.BigDecimal; |
| import java.math.RoundingMode; |
| import java.sql.*; |
| import java.util.Calendar; |
| 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; |
| |
| /** Column metadata definition */ |
| public class BigDecimalColumn extends ColumnDefinitionPacket implements ColumnDecoder { |
| |
| /** |
| * Constructor for column corresponding to DECIMAL datatype. Class permit specific decoding for |
| * this datatype |
| * |
| * @param buf Column definition MySQL packet buffer |
| * @param charset charset |
| * @param length datatype length |
| * @param dataType data type |
| * @param decimals number of decimals |
| * @param flags column flags |
| * @param stringPos string value position |
| * @param extTypeName extended type name |
| * @param extTypeFormat extended type format |
| */ |
| public BigDecimalColumn( |
| 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 BigDecimal.class.getName(); |
| } |
| |
| public int getColumnType(Configuration conf) { |
| return Types.DECIMAL; |
| } |
| |
| public String getColumnTypeName(Configuration conf) { |
| return "DECIMAL"; |
| } |
| |
| public int getPrecision() { |
| // DECIMAL and OLDDECIMAL are "exact" fixed-point number. |
| // so : |
| // - if is signed, 1 byte is saved for sign |
| // - if decimal > 0, one byte more for dot |
| if (isSigned()) { |
| return (int) (columnLength - ((decimals > 0) ? 2 : 1)); |
| } else { |
| return (int) (columnLength - ((decimals > 0) ? 1 : 0)); |
| } |
| } |
| |
| @Override |
| public Object getDefaultText(final Configuration conf, ReadableByteBuf buf, int length) |
| throws SQLDataException { |
| return new BigDecimal(buf.readAscii(length)); |
| } |
| |
| @Override |
| public Object getDefaultBinary(final Configuration conf, ReadableByteBuf buf, int length) |
| throws SQLDataException { |
| return new BigDecimal(buf.readAscii(length)); |
| } |
| |
| @Override |
| public boolean decodeBooleanText(ReadableByteBuf buf, int length) throws SQLDataException { |
| return new BigDecimal(buf.readAscii(length)).intValue() != 0; |
| } |
| |
| @Override |
| public boolean decodeBooleanBinary(ReadableByteBuf buf, int length) throws SQLDataException { |
| return decodeBooleanText(buf, length); |
| } |
| |
| @Override |
| public byte decodeByteText(ReadableByteBuf buf, int length) throws SQLDataException { |
| String str = buf.readString(length); |
| try { |
| return new BigDecimal(str).setScale(0, RoundingMode.DOWN).byteValueExact(); |
| } catch (NumberFormatException | ArithmeticException nfe) { |
| throw new SQLDataException( |
| String.format("value '%s' (%s) cannot be decoded as Byte", str, dataType)); |
| } |
| } |
| |
| @Override |
| public byte decodeByteBinary(ReadableByteBuf buf, int length) throws SQLDataException { |
| return decodeByteText(buf, length); |
| } |
| |
| @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 { |
| long result; |
| String str = buf.readString(length); |
| try { |
| result = new BigDecimal(str).setScale(0, RoundingMode.DOWN).longValueExact(); |
| } catch (NumberFormatException | ArithmeticException nfe) { |
| throw new SQLDataException(String.format("value '%s' cannot be decoded as Short", str)); |
| } |
| if ((short) result != result || (result < 0 && !isSigned())) { |
| throw new SQLDataException("Short overflow"); |
| } |
| return (short) result; |
| } |
| |
| @Override |
| public short decodeShortBinary(ReadableByteBuf buf, int length) throws SQLDataException { |
| return decodeShortText(buf, length); |
| } |
| |
| @Override |
| public int decodeIntText(ReadableByteBuf buf, int length) throws SQLDataException { |
| long result; |
| String str = buf.readString(length); |
| try { |
| result = new BigDecimal(str).setScale(0, RoundingMode.DOWN).longValueExact(); |
| } catch (NumberFormatException | ArithmeticException nfe) { |
| throw new SQLDataException(String.format("value '%s' cannot be decoded as Integer", str)); |
| } |
| int res = (int) result; |
| if (res != result || (result < 0 && !isSigned())) { |
| throw new SQLDataException("integer overflow"); |
| } |
| return res; |
| } |
| |
| @Override |
| public int decodeIntBinary(ReadableByteBuf buf, int length) throws SQLDataException { |
| return decodeIntText(buf, length); |
| } |
| |
| @Override |
| public long decodeLongText(ReadableByteBuf buf, int length) throws SQLDataException { |
| String str2 = buf.readAscii(length); |
| try { |
| return new BigDecimal(str2).setScale(0, RoundingMode.DOWN).longValueExact(); |
| } catch (NumberFormatException | ArithmeticException nfe) { |
| throw new SQLDataException(String.format("value '%s' cannot be decoded as Long", str2)); |
| } |
| } |
| |
| @Override |
| public long decodeLongBinary(ReadableByteBuf buf, int length) throws SQLDataException { |
| String str = buf.readString(length); |
| try { |
| return new BigDecimal(str).setScale(0, RoundingMode.DOWN).longValueExact(); |
| } catch (NumberFormatException | ArithmeticException nfe) { |
| throw new SQLDataException(String.format("value '%s' cannot be decoded as Long", str)); |
| } |
| } |
| |
| @Override |
| public float decodeFloatText(ReadableByteBuf buf, int length) throws SQLDataException { |
| return Float.parseFloat(buf.readAscii(length)); |
| } |
| |
| @Override |
| public float decodeFloatBinary(ReadableByteBuf buf, int length) throws SQLDataException { |
| return new BigDecimal(buf.readAscii(length)).floatValue(); |
| } |
| |
| @Override |
| public double decodeDoubleText(ReadableByteBuf buf, int length) throws SQLDataException { |
| return Double.parseDouble(buf.readAscii(length)); |
| } |
| |
| @Override |
| public double decodeDoubleBinary(ReadableByteBuf buf, int length) throws SQLDataException { |
| return new BigDecimal(buf.readAscii(length)).doubleValue(); |
| } |
| |
| @Override |
| public Date decodeDateText(ReadableByteBuf buf, int length, Calendar cal) |
| throws SQLDataException { |
| buf.skip(length); |
| throw new SQLDataException(String.format("Data type %s cannot be decoded as Date", dataType)); |
| } |
| |
| @Override |
| public Date decodeDateBinary(ReadableByteBuf buf, int length, Calendar cal) |
| throws SQLDataException { |
| buf.skip(length); |
| throw new SQLDataException(String.format("Data type %s cannot be decoded as Date", dataType)); |
| } |
| |
| @Override |
| public Time decodeTimeText(ReadableByteBuf buf, int length, Calendar cal) |
| throws SQLDataException { |
| buf.skip(length); |
| throw new SQLDataException(String.format("Data type %s cannot be decoded as Time", dataType)); |
| } |
| |
| @Override |
| public Time decodeTimeBinary(ReadableByteBuf buf, int length, Calendar cal) |
| throws SQLDataException { |
| buf.skip(length); |
| throw new SQLDataException(String.format("Data type %s cannot be decoded as Time", dataType)); |
| } |
| |
| @Override |
| public Timestamp decodeTimestampText(ReadableByteBuf buf, int length, Calendar cal) |
| throws SQLDataException { |
| buf.skip(length); |
| throw new SQLDataException( |
| String.format("Data type %s cannot be decoded as Timestamp", dataType)); |
| } |
| |
| @Override |
| public Timestamp decodeTimestampBinary(ReadableByteBuf buf, int length, Calendar cal) |
| throws SQLDataException { |
| buf.skip(length); |
| throw new SQLDataException( |
| String.format("Data type %s cannot be decoded as Timestamp", dataType)); |
| } |
| } |