In my Eclipse runtime, I have the following three plug-ins (file names simplified for better readability):
- javax.wsdl.1.4.0.jar
- javax.wsdl.1.5.1.jar
- eclipse.wsdl.jar, which has a version restriction on the dependency: [1.4.0, 1.5.0)
The dependencies of my own plugin look like this: eclipse.wsdl javax.wsdl : "1.4.0"
When my own plugin tries to use the class WSDLFactory, an error would be thrown:
java.lang.LinkageError: loading constraint violation: loader "org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader@a7b0a7b" previously initiated loading for a different type with name "javax/wsdl/factory/WSDLFactory" defined by loader "org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader@7c647c64"
Apparently, my own plug-in loads the 1.5.1 version of WSDLFactory, while eclipse.wsdl loads the 1.4.0 version of WSDLFactory, and this cause the conflict. If I change the version restriction of my plugin to be [1.4.0, 1.5.1), the code would work just fine. However, this is unacceptable since my code needs to support Eclipse 3.5 which forces to use javax.wsdl.1.5.1 intead of 1.4.0.
Are there any way to force my code to use the WSDLFactory loaded by eclipse.wsdl instead of trying to load its own?
And if possible at all, is there a way to force loading the lowest version (instead of highest) bundle?
Update: I tried both Require-Bundle and Import-Package and got different results in dev and release environment. Require-Bundle doesn't work for either one. Import-Package works in the dev environment but not in the release environment.
My question is, while Require-Bundle would try to load classes that are in the highest version of the plugin, does Import-Package NOT behave like that?
The following are corresponding MANIFEST.MF's:
Require-Bundle:
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Test
Bundle-SymbolicName: wsdl.classloading.test; singleton:=true
Bundle-Version: 1.0.0.qualifier
Bundle-Activator: wsdl.classloading.test.Activator
Require-Bundle: org.eclipse.ui,
org.eclipse.core.runtime,
org.eclipse.wst.wsdl;bundle-version="1.1.202",
javax.wsdl;bundle-version="1.4.0"
Bundle-RequiredExecutionEnvironment: JavaSE-1.6
Bundle-ActivationPolicy: lazy
Import-Package:
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Test
Bundle-SymbolicName: wsdl.classloading.test; singleton:=true
Bundle-Version: 1.0.0.qualifier
Bundle-Activator: wsdl.classloading.test.Activator
Require-Bundle: org.eclipse.ui,
org.eclipse.core.runtime,
org.eclipse.wst.wsdl;bundle-version="1.1.202"
Bundle-RequiredExecutionEnvironment: JavaSE-1.6
Bundle-ActivationPolicy: lazy
Import-Package: javax.wsdl,
javax.wsdl.factory,
javax.wsdl.xml