[Feature] Add tidb datatype convertor

seatunnel-connectors-v2/connector-jdbc/src/main/java/org/apache/seatunnel/connectors/seatunnel/jdbc/catalog/tidb/TiDBDataTypeConvertor.java

@@ -0,0 +1,210 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.seatunnel.connectors.seatunnel.jdbc.catalog.tidb;
+
+import org.apache.seatunnel.api.table.catalog.DataTypeConvertException;
+import org.apache.seatunnel.api.table.catalog.DataTypeConvertor;
+import org.apache.seatunnel.api.table.type.BasicType;
+import org.apache.seatunnel.api.table.type.DecimalType;
+import org.apache.seatunnel.api.table.type.LocalTimeType;
+import org.apache.seatunnel.api.table.type.PrimitiveByteArrayType;
+import org.apache.seatunnel.api.table.type.SeaTunnelDataType;
+import org.apache.seatunnel.api.table.type.SqlType;
+import org.apache.seatunnel.common.exception.CommonErrorCode;
+import org.apache.seatunnel.connectors.seatunnel.jdbc.exception.JdbcConnectorException;
+
+import org.apache.commons.collections4.MapUtils;
+
+import com.google.auto.service.AutoService;
+import com.google.common.collect.ImmutableMap;
+import com.mysql.cj.MysqlType;
+
+import java.util.Collections;
+import java.util.Map;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+@AutoService(DataTypeConvertor.class)
+public class TiDBDataTypeConvertor implements DataTypeConvertor<MysqlType> {
+
+    public static final String PRECISION = "precision";
+    public static final String SCALE = "scale";
+
+    public static final Integer DEFAULT_PRECISION = 10;
+
+    public static final Integer DEFAULT_SCALE = 0;
+
+    @Override
+    public SeaTunnelDataType<?> toSeaTunnelType(String connectorDataType) {
+        checkNotNull(connectorDataType, "connectorDataType can not be null");
+        MysqlType mysqlType = MysqlType.getByName(connectorDataType);
+        Map<String, Object> dataTypeProperties;
+        switch (mysqlType) {
+            case BIGINT_UNSIGNED:
+            case DECIMAL:
+            case DECIMAL_UNSIGNED:
+            case BIT:
+                int left = connectorDataType.indexOf("(");
+                int right = connectorDataType.indexOf(")");
+                int precision = DEFAULT_PRECISION;
+                int scale = DEFAULT_SCALE;
+                if (left != -1 && right != -1) {
+                    String[] precisionAndScale =
+                            connectorDataType.substring(left + 1, right).split(",");
+                    if (precisionAndScale.length == 2) {
+                        precision = Integer.parseInt(precisionAndScale[0]);
+                        scale = Integer.parseInt(precisionAndScale[1]);
+                    } else if (precisionAndScale.length == 1) {
+                        precision = Integer.parseInt(precisionAndScale[0]);
+                    }
+                }
+                dataTypeProperties = ImmutableMap.of(PRECISION, precision, SCALE, scale);
+                break;
+            default:
+                dataTypeProperties = Collections.emptyMap();
+                break;
+        }
+        return toSeaTunnelType(mysqlType, dataTypeProperties);
+    }
+
+    // todo: It's better to wrapper MysqlType to a pojo in ST, since MysqlType doesn't contains
+    @Override
+    public SeaTunnelDataType<?> toSeaTunnelType(
+            MysqlType mysqlType, Map<String, Object> dataTypeProperties)
+            throws DataTypeConvertException {
+        checkNotNull(mysqlType, "mysqlType can not be null");
+        int precision;
+        int scale;
+        switch (mysqlType) {
+            case NULL:
+                return BasicType.VOID_TYPE;
+            case BOOLEAN:
+                return BasicType.BOOLEAN_TYPE;
+            case BIT:
+                precision = (Integer) dataTypeProperties.get(TiDBDataTypeConvertor.PRECISION);
+                if (precision == 1) {
+                    return BasicType.BOOLEAN_TYPE;
+                } else {
+                    return PrimitiveByteArrayType.INSTANCE;
+                }
+            case TINYINT:
+                return BasicType.BYTE_TYPE;
+            case TINYINT_UNSIGNED:
+            case SMALLINT:
+                return BasicType.SHORT_TYPE;
+            case SMALLINT_UNSIGNED:
+            case INT:
+            case MEDIUMINT:
+            case MEDIUMINT_UNSIGNED:
+            case YEAR:
+                return BasicType.INT_TYPE;
+            case INT_UNSIGNED:
+            case BIGINT:
+                return BasicType.LONG_TYPE;
+            case FLOAT:
+            case FLOAT_UNSIGNED:
+                return BasicType.FLOAT_TYPE;
+            case DOUBLE:
+            case DOUBLE_UNSIGNED:
+                return BasicType.DOUBLE_TYPE;
+            case TIME:
+                return LocalTimeType.LOCAL_TIME_TYPE;
+            case DATE:
+                return LocalTimeType.LOCAL_DATE_TYPE;
+            case TIMESTAMP:
+            case DATETIME:
+                return LocalTimeType.LOCAL_DATE_TIME_TYPE;
+                // TODO: to confirm
+            case CHAR:
+            case VARCHAR:
+            case TINYTEXT:
+            case TEXT:
+            case MEDIUMTEXT:
+            case LONGTEXT:
+            case JSON:
+            case ENUM:
+                return BasicType.STRING_TYPE;
+            case BINARY:
+            case VARBINARY:
+            case TINYBLOB:
+            case BLOB:
+            case MEDIUMBLOB:
+            case LONGBLOB:
+            case GEOMETRY:
+                return PrimitiveByteArrayType.INSTANCE;
+            case BIGINT_UNSIGNED:
+            case DECIMAL:
+            case DECIMAL_UNSIGNED:
+                precision = MapUtils.getInteger(dataTypeProperties, PRECISION, DEFAULT_PRECISION);
+                scale = MapUtils.getInteger(dataTypeProperties, SCALE, DEFAULT_SCALE);
+                return new DecimalType(precision, scale);
+                // TODO: support 'SET' & 'YEAR' type
+            default:
+                throw DataTypeConvertException.convertToSeaTunnelDataTypeException(mysqlType);
+        }
+    }
+
+    @Override
+    public MysqlType toConnectorType(
+            SeaTunnelDataType<?> seaTunnelDataType, Map<String, Object> dataTypeProperties)
+            throws DataTypeConvertException {
+        SqlType sqlType = seaTunnelDataType.getSqlType();
+        // todo: verify
+        switch (sqlType) {
+            case MAP:
+            case ROW:
+            case STRING:
+                return MysqlType.VARCHAR;
+            case BOOLEAN:
+                return MysqlType.BOOLEAN;
+            case TINYINT:
+                return MysqlType.TINYINT;
+            case SMALLINT:
+                return MysqlType.SMALLINT;
+            case INT:
+                return MysqlType.INT;
+            case BIGINT:
+                return MysqlType.BIGINT;
+            case FLOAT:
+                return MysqlType.FLOAT;
+            case DOUBLE:
+                return MysqlType.DOUBLE;
+            case DECIMAL:
+                return MysqlType.DECIMAL;
+            case NULL:
+                return MysqlType.NULL;
+            case BYTES:
+                return MysqlType.BIT;
+            case DATE:
+                return MysqlType.DATE;
+            case TIME:
+                return MysqlType.TIME;
+            case TIMESTAMP:
+                return MysqlType.DATETIME;
+            default:
+                throw new JdbcConnectorException(
+                        CommonErrorCode.UNSUPPORTED_DATA_TYPE,
+                        String.format("Doesn't support TiDB type '%s' yet", sqlType));
+        }
+    }
+
+    @Override
+    public String getIdentity() {
+        return "TiDB";
+    }
+}