replacing (not overriding) a core Java class with a custom one

[Adam Monsen]

Is it possible to inject or replace my own version of java.sql.Blob?

I'm using Sun's:

java version "1.6.0_10"
Java(TM) SE Runtime Environment (build 1.6.0_10-b33)
Java HotSpot(TM) Server VM (build 11.0-b15, mixed mode)

Installed via "sudo apt-get install sun-java6-jdk" on Ubuntu 8.10.

I'm trying to compile this software project: http://mayfly.sf.net/
And am running into these errors: http://pastey.net/106904

The source for Mayfly includes JDBC 3 from libgcj, and this jar
includes java.sql.Blob, but the compiler appears to be ignoring this
class/jar. Any thoughts on what's going on here?

Thanks,
-Adam

here's another reference, for historical reasons:
http://thread.gmane.org/gmane.comp.db.mayfly.general/105

 

[Arne Vajhøj]

Is it possible to inject or replace my own version of java.sql.Blob?

I'm using Sun's:

java version "1.6.0_10"
Java(TM) SE Runtime Environment (build 1.6.0_10-b33)
Java HotSpot(TM) Server VM (build 11.0-b15, mixed mode)

Installed via "sudo apt-get install sun-java6-jdk" on Ubuntu 8.10.

I'm trying to compile this software project: http://mayfly.sf.net/
And am running into these errors: http://pastey.net/106904

The source for Mayfly includes JDBC 3 from libgcj, and this jar
includes java.sql.Blob, but the compiler appears to be ignoring this
class/jar. Any thoughts on what's going on here?

That code "Mayfly" apparently does not build with Java 1.6.

(because of new methods added to various interfaces)

You need an older Java version.

Arne

 

[Lew]

That code "Mayfly" apparently does not build with Java 1.6.

(because of new methods added to various interfaces)

You need an older Java version.

It's a violation of Java compatibility and good sense to release a program
that substitutes for any of the 'java[x]' package classes. (Exception:
certified Java environments like IBM's.) Also, including anything from GCJ is
a mistake.

What interfaces got new methods?

You can control the boot class path with the 'java' command
'-Xbootclasspath:<directories and zip/jar files separated by : >' options.
The prefix version should let you plug in your own Blob implementation.

But don't.

 

[Arne Vajhøj]

That code "Mayfly" apparently does not build with Java 1.6.

(because of new methods added to various interfaces)

You need an older Java version.

It's a violation of Java compatibility and good sense to release a
program that substitutes for any of the 'java[x]' package classes.

It does not do that.

What interfaces got new methods?

Several of the interfaces in java.sql got new methods in 1.6.

Arne