[kepler-dev] Java 1.5 for Kepler

Dan Higgins higgins at nceas.ucsb.edu
Fri Sep 28 11:53:24 PDT 2007

    Although I haven't heard from Ilkay, I went ahead and checked in 
your suggested changes and set the build file to compile for Java 1.5. 
Hopefully this won't create new problems ;-)

    I do see several warning in the opendap prototype code (below) but 
compilation does work.

    [javac] C:\work\kepler\build\src\org\nddp\DataTypes.java:145: 
warning: non-v
arargs call of varargs method with inexact argument type for last parameter;
    [javac] cast to java.lang.Class for a varargs call
    [javac] cast to java.lang.Class[] for a non-varargs call and to 
suppress thi
s warning
    [javac]                     method = objectClass.getMethod(property, 
[javac]                                                                  ^
    [javac] C:\work\kepler\build\src\org\nddp\DataTypes.java:153: 
warning: non-v
arargs call of varargs method with inexact argument type for last parameter;
    [javac] cast to java.lang.Object for a varargs call
    [javac] cast to java.lang.Object[] for a non-varargs call and to 
suppress th
is warning
    [javac]                 returnedObject = method.invoke(object,null);
    [javac]                                                           ^
    [javac] Note: Some input files use or override a deprecated API.
    [javac] Note: Recompile with -Xlint:deprecation for details.
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 2 warnings


Carlos Rueda wrote:
> Hi Ilkay,
> FYI, according to 
> http://forum.java.sun.com/thread.jspa?threadID=656737&messageID=3859717
> I changed your import to read (in my local copy):
>    import org.apache.axis.constants.Style;
> and the file compiles OK under 1.5.
> Carlos
> Carlos Rueda wrote:
>> Hello Dan, Ilkay,
>> Right, I just did a quick check of recompiling everything and it seems
>> MessageBasedWebService.java is the only file that needs the
>> source="1.4" flag: I only included it in a new target:
>>    <target name="compile-dev-14"> <javac ...
>>        includes="org/sdm/spa/MessageBasedWebService.java"
>>        source="1.4"
>>    ...
>> and excluded it from the (modified) target:
>>   <target name="compile-dev" depends="compile-dev-14"> <javac ...
>>        excludes="org/sdm/spa/MessageBasedWebService.java"
>>    ...
>> Compilation completes successfully. Also, I don't expect any binary
>> compatibility problem with the apache axis dpendency, but I guess it
>> would be better to update that dependency as well.
>> Great that you have brought up this topic!
>> Thanks.
>> Carlos
>> Dan Higgins wrote:
>>> Hi Ilkay,
>>>     I did run into a problem in compiling Kepler without the 'source 
>>> 1.4' setting. I get the error
>>>     [javac] Compiling 915 source files to C:\work\kepler\build\classes
>>>     [javac] 
>>> C:\work\kepler\build\src\org\sdm\spa\MessageBasedWebService.java:85:
>>>  as of release 1.5, 'enum' is a keyword, and may not be used as an 
>>> identifier
>>>     [javac] (try -source 1.4 or lower to use 'enum' as an identifier)
>>>     [javac] import org.apache.axis.enum.Style;
>>>     [javac]                        ^
>>>     [javac] 1 error
>>> It looks like the MessageBasedWebService actor calls an axis class 
>>> that has 'enum' in the path and Java 1.5 does not like that! So it 
>>> looks like the axis package we are using is pre Java 1.5. Is there a 
>>> fix for this? (I am assuming you are familiar with this code.)
>>> Dan
>>> Dan Higgins wrote:
>>>> Hi All,
>>>>     As you may well know, current Kepler builds are based on Java 
>>>> 1.4. The ant build file allows the use of Java 1.5 but the 
>>>> '-source' command line option is set to '1.4'.
>>>>     Several developers have wanted to use some Java features (e.g. 
>>>> generics) that are present in Java 1.5 but not in Java 1.4. Since 
>>>> Java 1.5 is readily available for Windows, Mac, and Linux, I do not 
>>>> see any problems with simply dropping the '-source 1.4' switch from 
>>>> the compiler command line and making 1.5 the default version of 
>>>> Java for Kepler. Does anyone out there object to this, or know of 
>>>> some problems that may occur?
>>>> Dan Higgins
>> _______________________________________________
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Dan Higgins                                  higgins at nceas.ucsb.edu
http://www.nceas.ucsb.edu/    Ph: 805-893-5127
National Center for Ecological Analysis and Synthesis (NCEAS) Marine Science Building - Room 3405
Santa Barbara, CA 93195

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