QLH is the handler class to be used when passing through the query layer of a query object.

This technology allows you to process as needed before/after query operations.

We can achieve our goal by overriding the following methods. The working times and meanings of these methods are brief;

• OnQueryExecution Triggered when the query object is running.
• beforeInsert It is triggered before the save operation. 
• afterInsert It is triggered after saving operation.
• afterDelete Triggered after deletion.
• beforeDelete Is triggered before deletion.
• beforeUpdate Triggered before the update operation.
• afterUpdate Triggered after the update operation.
• beforeRead The database is triggered before the read operation.
• afterRead Database is triggered after reading operation.

1 - First, we need to define "queryLogicHandlers" progeny. Please check the following steps for this.

• The Definitions> QueryLogichandlers file under the project is selected
• The identification screen opens.
• Right Click to open the identification screen.

2 - We make the necessary definitions from the "Query Logic Handler Definition" screen that opens;

• Name :  Ordinary
• Query Logic Handler Package : Package name
• Query Logic Handler : A new handler class can be created or available.
• Query Object : Query object associated with Handler
• Main Table: Table identification field
• Description : Explanation

3 - After that;

We perform our operations by calling the necessary methods in the class that is created when we define.

package com.LPT.customization;
import javax.swing.JOptionPane;
import com.lbs.data.factory.IBusinessLogicFactory;
import com.lbs.data.query.QueryActiveSchema;
import com.lbs.data.query.QueryBusinessObject;
import com.lbs.data.query.QueryCommand;
import com.lbs.data.query.QueryLogicHandler;


public class CQLArpCardBrowser extends QueryLogicHandler
{
  @Override

public boolean onQueryExecution(IBusinessLogicFactory factory,
 QueryActiveSchema querySchema, QueryCommand queryCommand,
    QueryBusinessObject item, int point) { 

	item.getProperties().set("CustomFieldName", "QLHTest..");	
	System.out.println("onQueryExecution...");              

   return
super.onQueryExecution(factory, querySchema, queryCommand, item, point);

                                          }
}