| Problem with Java-IDL bridge with custom Java object [message #75857] |
Mon, 25 April 2011 11:32 |
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Matt[4]
Messages: 3
Registered: April 2011
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Junior Member |
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Being neither an IDL nor a Java expert, I'm having trouble getting the
the Java-IDL bridge working. For a simple test case of getting a Java
object from IDL, I've tried creating a simple Java object:
public class MyCl {
String stringMember;
public MyCl() {
stringMember = new String("String member");
}
public String toString() {
return stringMember;
}
}
This has been tested with another Java class and found to be working.
I've created an IDL program to test this Java class via the Java-IDL
bridge:
pro bridge_test
print, "In bridge_test"
java_str_obj = obj_new("IDLJavaObject$java.lang.String",
"java.lang.String", "a string")
if (obj_class(java_str_obj) ne "IDLJAVAOBJECT
$JAVA.LANG.STRING") then begin
print, "Error creating Java String object"
endif else begin
print, "Java String object created (I think)"
the_string = java_str_obj -> toString()
print, "the_string = '", the_string, "'"
endelse
print, ""
print, "Trying custom object ..."
print, ""
java_test_obj = obj_new("IDLJavaObject$MyCl", "MyCl")
print, "After getting new object"
end
When run, the first part (creating a String) works as expected (it
prints the progress messages, ending with "the_string = 'a string'").
However, when it gets to the second part, I'm getting a lengthy
exception after the "Trying custom object" message is printed:
% ERR -ReflObject::doesClassExist LinkageError:Bad version number
in .class file
% java.lang.UnsupportedClassVersionError: Bad version number in .class
file
% at java.lang.ClassLoader.defineClass1(Native Method)
% at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
% at
java.security.SecureClassLoader.defineClass(SecureClassLoade r.java:
124)
% at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
% at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
% at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
% at java.security.AccessController.doPrivileged(Native Method)
% at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
% at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
% at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268 )
% at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
% at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319 )
% at java.lang.Class.forName0(Native Method)
% at java.lang.Class.forName(Class.java:164)
% at com.rsi.javab.ReflObject.doesClassExist(ReflObject.java:601)
% Class MyCl not found
% Execution halted at: BRIDGE_TEST 18 /home/melliott/Src/
JavaIDL/nopackage/bridge_test.pro
% $MAIN$
I've tried several things, including pointing the CLASSPATH
environment variable straight at the directory which contains the
MyCl.class file, many manipulations of the .idljavabrc file, and
putting putting MyCl into a jar which is then put into the .idljavabrc
file. Unfortunately, nothing has worked.
This is on an Ubuntu 10.10 Linux system with Java 1.6 and IDL 7.1.
Any help would be greatly appreciated!
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