Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Kudos to you for the sheer awesomeness of this question. You're pretty much up against the limits of what Java can do. (Though, of course, delegating like you describe would be a breeze in any functional language.)</p> <p>First of all, limitation #2 should not be an issue. As of 1.5, Java no longer restricts you to fixed declarations in methods. You can use an ellipsis to indicate a variable number of arguments, like <a href="http://www.deitel.com/articles/java_tutorials/20060106/VariableLengthArgumentLists.html" rel="nofollow noreferrer">so</a></p> <pre><code>public static double average( double... numbers ) { double total = 0.0; for (double d : numbers) { total += d; } return total / numbers.length; } </code></pre> <p>I'm not entirely sure how to get around limitation #1, but I'm thinking about something with <a href="http://java.sun.com/j2se/1.5.0/docs/guide/language/generics.html" rel="nofollow noreferrer">generics</a> and/or <a href="http://www.javaworld.com/javaworld/javaqa/2000-03/02-qa-innerclass.html" rel="nofollow noreferrer">anonymous inner classes</a>. I'm guessing here -- I haven't tried doing this myself -- but you could create a map of function names and delegate classes like so:</p> <pre><code>public interface Callback {...} public interface AddUserCallBack extends Callback {...} public class UserImpl&lt;T extends Callback&gt; { public T getDelegateRoutine(); ... } </code></pre> <p>Generics in Java have some hair-pulling frustrations associated with them, primarily due to type erasure. You may need to juggle both interfaces and abstract base classes before you get it to do what you want. But something like this should work for you.</p>
    singulars
    1. This table or related slice is empty.
    1. POMap of delegates in Java
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USrtperson
    1. USrtperson
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. CO-1 for not understanding varargs. Those methods still have a fixed number of arguments - the ellipsis is just syntactic sugar hiding an array. Also, generics would probably have zilch to do with a good solution here.
      singulars
      1. PO
      1. USgustafc
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload