| // 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.plugin.codec; |
| |
| import java.io.IOException; |
| import java.sql.SQLDataException; |
| import java.util.Calendar; |
| import org.mariadb.jdbc.client.*; |
| import org.mariadb.jdbc.client.socket.Writer; |
| import org.mariadb.jdbc.plugin.Codec; |
| import org.mariadb.jdbc.type.*; |
| |
| /** LineString codec */ |
| public class LineStringCodec implements Codec<LineString> { |
| |
| /** default instance */ |
| public static final LineStringCodec INSTANCE = new LineStringCodec(); |
| |
| public String className() { |
| return LineString.class.getName(); |
| } |
| |
| public boolean canDecode(ColumnDecoder column, Class<?> type) { |
| return column.getType() == DataType.GEOMETRY && type.isAssignableFrom(LineString.class); |
| } |
| |
| public boolean canEncode(Object value) { |
| return value instanceof LineString; |
| } |
| |
| @Override |
| public LineString decodeText(ReadableByteBuf buf, int length, ColumnDecoder column, Calendar cal) |
| throws SQLDataException { |
| return decodeBinary(buf, length, column, cal); |
| } |
| |
| @Override |
| public LineString decodeBinary( |
| ReadableByteBuf buf, int length, ColumnDecoder column, Calendar cal) throws SQLDataException { |
| if (column.getType() == DataType.GEOMETRY) { |
| buf.skip(4); // SRID |
| Geometry geo = Geometry.getGeometry(buf, length - 4, column); |
| if (geo instanceof LineString) return (LineString) geo; |
| throw new SQLDataException( |
| String.format( |
| "Geometric type %s cannot be decoded as LineString", geo.getClass().getName())); |
| } |
| buf.skip(length); |
| throw new SQLDataException( |
| String.format("Data type %s cannot be decoded as LineString", column.getType())); |
| } |
| |
| @Override |
| public void encodeText( |
| Writer encoder, Context context, Object value, Calendar cal, Long maxLength) |
| throws IOException { |
| encoder.writeBytes(("ST_LineFromText('" + value.toString() + "')").getBytes()); |
| } |
| |
| @Override |
| public void encodeBinary(Writer encoder, Object value, Calendar cal, Long maxLength) |
| throws IOException { |
| LineString line = (LineString) value; |
| |
| encoder.writeLength(13 + line.getPoints().length * 16L); |
| encoder.writeInt(0); // SRID |
| encoder.writeByte(0x01); // LITTLE ENDIAN |
| encoder.writeInt(2); // wkbLineString |
| encoder.writeInt(line.getPoints().length); |
| for (Point pt : line.getPoints()) { |
| encoder.writeDouble(pt.getX()); |
| encoder.writeDouble(pt.getY()); |
| } |
| } |
| |
| public int getBinaryEncodeType() { |
| return DataType.BLOB.get(); |
| } |
| } |