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I understand, thanks to this question, that the value of a static field declared in an abstract class will be the same among all subclasses.

The solution in the aforementioned question is to declare a static field in each subclass, and an abstract "getter" instance method in the abstract class that must be implemented by each subclass.

But I have a static method in my abstract class, and I need to refer to the static field of the subclass. I can't do this because the getter is an instance method.

What's the best solution here? I'd rather not put nearly identical instances of getAll in every subclass.

public abstract class AbstractModel 

 public abstract String getTableName();

 public static ResultSet getAll() 

 Statement stmt = Database.get().conn.createStatement();

 // Error below: Cannot use "this" in static context.
 String query = "SELECT * FROM `" + this.getTableName() + "`";

 return stmt.executeQuery(query);
 



public class Api extends AbstractModel 

 protected static final String TABLE_NAME = "apis";

 @Override
 public String getTableName() 
 return TABLE_NAME;
 

I was able to write the code in this way, to minimize repitition. It also eliminates the need for a getter.

public abstract class AbstractModel 

 public static ResultSet getAllFromTable(String tableName) 

 Statement stmt = Database.get().conn.createStatement();

 String query = "SELECT * FROM `" + tableName + "`";

 return stmt.executeQuery(query);
 



public class Api extends AbstractModel 

 protected static final String TABLE_NAME = "apis";

 public static ResultSet getAll() 
 return getAllFromTable(TABLE_NAME);