The Third Manifesto

The Third Manifesto is Darwen and Date's latest take on the relational model.  It attempts to eliminate the OO/relational impedence mismatch by fully supporting the relational model (in contrast, say, to the limited support in SQL).

Google Chart API

Google provides a nifty service for generating charts, the Google Chart API.  You can get charts like this...

... just by crafting up a special URL:

http://chart.apis.google.com/chart?chs=200x100&cht=lxy&chtt=A Google Chart&chd=t:10,20,40,60,80,100|99,50,15,125,300,43

Hibernate Tuple Query Debugging

If you are using a Hibernate HQL query like select new MyClass(...) and Hibernate cannot find an appropriate constructor, the exception message does not tell you  the types of arguments for which it was looking.  You can find out by setting a breakpoint in org.hibernate.util.ReflectHelper#getConstructor(...).

Hibernate cannot find tuple classes that are inner classes.

Broken Hibernate Tools for Eclipse

The Hibernate Tools 3.2.1.GA running in Eclipse 3.3.2 have problems.

The worst is that when you run your second HQL query, the IDE hangs.  You can avoid the hang if you remember to close the previous result set pane first.

Also, the Hibernate Entity Diagram view is completely missing.