Please support 1.4.2 compiler

[strkrobertm]

Recent changes to the head to support 1.5 Enum have broken compatiblity with 1.4.2.

The project in my opinion should compile and run under both 1.4.2 and 1.5

[clebert.suconic]

My idea was to use a java5 compiler supporting java 1.4 runtime.

PersisterResolver is checking for the availability of the class by a ClassLoader operation. if the class is not available it won't use Enumeration.

I will be doing some tests today to validate this.

And I will separate jdk1.5 sourcecode from jdk1.4 in such way that if you use a JVM 1.4 you could compile it without enumeration.

[starksm64]

You could use jbossretro to produce a 1.4 compatible binary. Being able to compile under j2se14 is not as relevant as being able to run under j2se14 in my view.

[clebert.suconic]

If you compile with JDK 5, the produced binary is compatible with JDK 1.4. I'm not using any Java5 specific feature, so I don't need to retroweave the code.

The issue is if you want to develop using JDK 1.4 you will get compilation exceptions.