Type mismatch: cannot convert from List<Map<String,Object>> to Map<String,Object>-CodePudding

I need to loop depending on the number of rows thrown by a given SQL SENTENCE and assign the value of the column in every iteration

This is my CODE:

package first;

import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.support.ui.FluentWait;
import org.openqa.selenium.support.ui.Wait;
import org.apache.commons.dbutils.DbUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.MapHandler;
import org.apache.commons.dbutils.handlers.MapListHandler;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;

public class assign_code{
    static Connection conn = null;
    static QueryRunner run = new QueryRunner();
    static boolean keepConnection = false;
    
    public static void createConn(String urlString, String driverr, String usernameString, String password) throws SQLException, IOException {

        if (conn == null || conn.isClosed()) {
            String driver = null;
            DbUtils.loadDriver(driver);
            conn = DriverManager.getConnection(urlString, usernameString, password);
            conn.setAutoCommit(false);
        }
    }
    
    public static List<Map<String, Object>> getResultInMapList(String urlString, String driverr, String usernameString, String password,String sqlQuery, Object... params) throws
    SQLException, IOException {

        try {
            createConn(urlString,driverr,usernameString,password);
            if (params == null) {
            return run.query(conn, sqlQuery, new MapListHandler());
      } else {
          return run.query(conn, sqlQuery, new MapListHandler(), params);
    }
     } catch (SQLException se) {
    se.printStackTrace();
         return null;
     } finally {
    closeConn();
     }
   }
    
    
    public static void closeConn() throws SQLException {
        if (!keepConnection) {
            DbUtils.closeQuietly(conn);
        }
    }
    
    
    public static void main(String[] args) throws InterruptedException, SQLException, IOException{
    System.setProperty("webdriver.chrome.driver","C:\\Users\\Steven\\Desktop\\SELENIUM\\chromedriver.exe");
    
    String urlString="jdbc:sqlserver://GERTER5404.btqw.local:1433;databaseName=Test";
    String usernameString="admin";
    String password="admin";
    String driverr="com.microsoft.sqlserver.jdbc.SQLServerDriver";
    String sqlQuery= "select APPROVERID from orders.Approvals where ITEMID = ?";
    
    Map<String,Object>resultSet= getResultInMapList(urlString, driverr, usernameString, password, sqlQuery, "45");

    WebDriver driver = new ChromeDriver();
    driver.get("https://stage.com/backend");
    driver.findElement(By.id("username")).sendKeys("admin");
    driver.findElement(By.id("login")).sendKeys("12345678");
    driver.findElement(By.id("add_new_option_button")).click();
    driver.findElement(By.xpath("//*[@id=\"manage-options-panel\"]/table/tbody/tr[117]/td[3]/input")).sendKeys(resultSet.get("APPROVERID").toString());

    driver.findElement(By.xpath("//*[@id=\"save\"]/a")).click();
    Thread.sleep(3000);

    
    }
}

Suppose that my SQL QUERY thrown 3 rows after executing this:

SQL QUERY:

select APPROVERID from orders.Approvals where ITEMID = 45;

Image:

I want to loop depending on the amount of rows thrown by the SQL QUERY and assign the value

In first loop, I need to set the parameter APPROVERID within the value from row #1 and column #4

In the second loop, I need to set the parameter APPROVERID within the value from row #2 and column #4

In the THIRD loop, I need to set the parameter APPROVERID within the value from row #3 and column #4

I did this:

A function called "getResultInMapList":

    public static List<Map<String, Object>> getResultInMapList(String urlString, String driverr, String usernameString, String password,String sqlQuery, Object... params) throws
    SQLException, IOException {

        try {
            createConn(urlString,driverr,usernameString,password);
            if (params == null) {
            return run.query(conn, sqlQuery, new MapListHandler());
      } else {
          return run.query(conn, sqlQuery, new MapListHandler(), params);
    }
     } catch (SQLException se) {
    se.printStackTrace();
         return null;
     } finally {
    closeConn();
     }
   }

Invoking the method:

 String sqlQuery= "select APPROVERID from orders.WebOrderItem where itemid = ?"; 
    List<Map<String, Object>>resultSet=getResultInMapList(String url, String driver, String usr, String pwd,sqlQuery, "45"); 
        for (Map<String, Object> rows: resultSet) 
            { for (Map.Entry<String, Object> row: rows.entrySet()) 
                { driver.findElement(By.xpath("//*[@id=\"attributeGrid_filter_frontend_label\"]")).ssendKeys(resultSet.get("sku").toString()); } 
                
            }

I am having this message:

What am i doing wrong?

Am i looping alright?

EDIT #1:

I am having this error after using this sentence:

List<Map<String, Object>>resultSet= getResultInMapList(urlString, driverr, usernameString, password, sqlQuery, "45");

The method get(int) in the type List<Map<String,Object>> is not applicable for the arguments (String)

CodePudding user response：

You have Declared

 List<Map<String, Object>> getResultInMapList(String urlString, String driverr, String usernameString, String password,String sqlQuery, Object... params)`

and inside main method you are calling

Map<String,Object>resultSet= getResultInMapList(urlString, driverr, usernameString, password, sqlQuery, "45")`

which is never declared. Hence the error

CodePudding user response：

You're getting that error because your method "getResultInMapList" is returning a List of Map (List<Map<String,Object>>) and you're trying to place those results into a single map Map<String, Object> instead in a List of Map.

I'm looking at the image at the end of your question, and in there, instead of:

Map<String, Object>resultSet=getResultInMapList(String url, String driver, String usr, String pwd,sqlQuery, "45");

You need to write:

List<Map<String, Object>>resultSet=getResultInMapList(String url, String driver, String usr, String pwd,sqlQuery, "45");

And that will fix your error.