DO NOT REPLY [Bug 31787] New: - Cocoon fails to build with Java 5

[bu...@apache.org]

DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG 
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=31787>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND 
INSERTED IN THE BUG DATABASE.

http://issues.apache.org/bugzilla/show_bug.cgi?id=31787

Cocoon fails to build with Java 5

           Summary: Cocoon fails to build with Java 5
           Product: Cocoon 2
           Version: 2.1.5
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: core
        AssignedTo: dev@cocoon.apache.org
        ReportedBy: wasti.redl@gmx.net


As the Wiki FAQ shows, at least one other user had this problem and couldn't
resolve it, so reverted to a 1.4 JDK.

When trying to build Cocoon 2.1 via the build.sh/build.bat, it fails, due to the
javac error message:

javac: source release 1.4 requires target release 1.4

This is because the -source switch for a 1.5 javac defaults to 1.4. The error
message is generated if you set -target to 1.3 and don't set source, or set it
to something higher (1.4 or 1.5).
The Cocoon build.xmls use target="1.3" in their javac tasks, without setting
source. Thus the compile fails.
I see three possible solutions:
1) Upgrade all target attributes to 1.4. This is actually inacceptable, because
a) it only delays the problem until Java 1.6 comes out and defaults to 1.5
source and b) it drops support for Java 1.3, which is probably not desired.
2) Add a source="1.3" in all javac tasks. This is a possible solution, but it
binds forever to Java 1.3.
3) Make the target attribute depend on the local Java version. There ought to be
no problem at all in writing target="${ant.javaversion]" or whatever property is
used for this.

I'll patch my own source tree and see if this solves the problem, then post back.