introduce JdbcDataType

Author: pan3793

clickhouse-native-jdbc/src/main/java/com/github/housepower/jdbc/type/JdbcDataType.java

@@ -0,0 +1,34 @@
+/*
+ * Licensed 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 com.github.housepower.jdbc.type;
+
+public interface JdbcDataType<JDBC> {
+
+    int sqlTypeId();
+
+    Class<JDBC> javaType();
+
+    boolean nullable();
+
+    int getPrecision();
+
+    int getScale();
+
+    boolean isSigned();
+
+    default String format(JDBC value) {
+        return value.toString();
+    }
+}

clickhouse-native-jdbc/src/main/java/com/github/housepower/jdbc/type/JdbcDataTypeFactory.java

@@ -0,0 +1,19 @@
+/*
+ * Licensed 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 com.github.housepower.jdbc.type;
+
+public class JdbcDataTypeFactory {
+
+}

clickhouse-native-jdbc/src/main/java/com/github/housepower/jdbc/type/JdbcDecimal.java

@@ -0,0 +1,37 @@
+/*
+ * Licensed 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 com.github.housepower.jdbc.type;
+
+import com.github.housepower.data.IDataType;
+
+import java.math.BigDecimal;
+import java.sql.Types;
+
+public class JdbcDecimal extends WrappedJdbcDataType<BigDecimal> {
+
+    public JdbcDecimal(IDataType<BigDecimal, BigDecimal> ckDataType) {
+        super(ckDataType);
+    }
+
+    @Override
+    public int sqlTypeId() {
+        return Types.DECIMAL;
+    }
+
+    @Override
+    public Class<BigDecimal> javaType() {
+        return BigDecimal.class;
+    }
+}

clickhouse-native-jdbc/src/main/java/com/github/housepower/jdbc/type/WrappedJdbcDataType.java

@@ -0,0 +1,51 @@
+/*
+ * Licensed 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 com.github.housepower.jdbc.type;
+
+import com.github.housepower.data.IDataType;
+
+public abstract class WrappedJdbcDataType<JDBC> implements JdbcDataType<JDBC> {
+
+    protected final IDataType<JDBC, JDBC> ckDataType;
+
+    protected WrappedJdbcDataType(IDataType<JDBC, JDBC> ckDataType) {
+        this.ckDataType = ckDataType;
+    }
+
+    @Override
+    public boolean nullable() {
+        return ckDataType.nullable();
+    }
+
+    @Override
+    public int getPrecision() {
+        return ckDataType.getPrecision();
+    }
+
+    @Override
+    public int getScale() {
+        return ckDataType.getScale();
+    }
+
+    @Override
+    public boolean isSigned() {
+        return ckDataType.isSigned();
+    }
+
+    @Override
+    public String format(JDBC value) {
+        return ckDataType.serializeText(value);
+    }
+}