synchronizer jdbc & optimize

maxkey-common/src/main/java/org/maxkey/entity/DbTableColumn.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2022, MaxKey and/or its affiliates. All rights reserved.
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Please contact MaxKey, visit www.maxkey.top if you need additional
+ * information or have any questions.
+ */
+
+package org.maxkey.entity;
+
+public class DbTableColumn {
+	String column;
+	String type;
+	int precision;
+	int scale;
+
+	public DbTableColumn(String column, String type, int precision, int scale) {
+		super();
+		this.column = column;
+		this.type = type;
+		this.precision = precision;
+		this.scale = scale;
+	}
+
+	public String getColumn() {
+		return column;
+	}
+
+	public void setColumn(String column) {
+		this.column = column;
+	}
+
+	public String getType() {
+		return type;
+	}
+
+	public void setType(String type) {
+		this.type = type;
+	}
+
+	public int getPrecision() {
+		return precision;
+	}
+
+	public void setPrecision(int precision) {
+		this.precision = precision;
+	}
+
+	public int getScale() {
+		return scale;
+	}
+
+	public void setScale(int scale) {
+		this.scale = scale;
+	}
+
+}

maxkey-common/src/main/java/org/maxkey/entity/DbTableMetaData.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2022, MaxKey and/or its affiliates. All rights reserved.
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Please contact MaxKey, visit www.maxkey.top if you need additional
+ * information or have any questions.
+ */
+
+package org.maxkey.entity;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+
+public class DbTableMetaData {
+	String tableName;
+	
+	ArrayList<DbTableColumn> columns = new ArrayList<DbTableColumn>();
+	
+	HashMap<String,DbTableColumn> columnsMap = new HashMap<String,DbTableColumn>();
+
+	public DbTableMetaData(String tableName) {
+		super();
+		this.tableName = tableName;
+	}
+
+	public String getTableName() {
+		return tableName;
+	}
+
+	public void setTableName(String tableName) {
+		this.tableName = tableName;
+	}
+
+	public ArrayList<DbTableColumn> getColumns() {
+		return columns;
+	}
+
+	public void setColumns(ArrayList<DbTableColumn> columns) {
+		this.columns = columns;
+	}
+
+	public HashMap<String, DbTableColumn> getColumnsMap() {
+		return columnsMap;
+	}
+
+	public void setColumnsMap(HashMap<String, DbTableColumn> columnsMap) {
+		this.columnsMap = columnsMap;
+	}
+	
+	
+}

maxkey-common/src/main/java/org/maxkey/util/JdbcUtils.java

@@ -20,9 +20,14 @@ package org.maxkey.util;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
+import java.sql.ResultSetMetaData;
 import java.sql.SQLException;
 import java.sql.Statement;
 
+import org.maxkey.entity.DbTableColumn;
+import org.maxkey.entity.DbTableMetaData;
+
+
 public class JdbcUtils {
 
 	public static Connection connect(String url, String user, String pwd, String driverClass) {
@@ -106,6 +111,27 @@ public class JdbcUtils {
 			}
 		}
 	}
-
+	
+	public static DbTableMetaData getMetaData(ResultSet rs) {
+		try {
+			ResultSetMetaData metaData = rs.getMetaData();
+			DbTableMetaData meta = new DbTableMetaData(metaData.getTableName(1));
+			int count = metaData.getColumnCount();
+			for (int i = 1; i <= count; i++) {
+				DbTableColumn column = new DbTableColumn(
+						metaData.getColumnName(i).toLowerCase(),
+						metaData.getColumnTypeName(i),
+						metaData.getPrecision(i),
+						metaData.getScale(i)
+						);
+				meta.getColumns().add(column);
+				meta.getColumnsMap().put(column.getColumn(), column);
+			}
+			return meta;
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}
+		return null;
+	}
 	
 }