java - Eclipse Plugin Development - ClassCastException cannot cast abc.xyz to abc.xyz -


i developing plugin in eclipse. have encountered problem following code:

xyz object1 = xyz(object2);

where said line throws exception:

caused by: java.lang.classcastexception: abc.xyz cannot cast abc.xyz

xyz class plugin. unfortunately, said plugin not have packages visible. so, setting dependency threw classdefnotfound exception.

luckily, have .jar of plugin , added plugin's build path. when did so, still returned classdefnotfound exception. looked around , found out plugins, referenced libraries not 'detected' jvm automatically, , so, followed solution add said jar manifest.mf , bin.includes section of plugin's build.properties.

after following said solution, tried again , have classcastexception. atleast, @ point, class xyz jar file being loaded. doing research, found out classloaders of both xyz classes different. quite stuck on steps should do.

here's summary of whole problem:

  • required class plugin. said plugin not have classes visible.
  • added dependency plugin's jar file build path.
  • classdefnotfoundexception thrown.
  • updated plugin's manifest.mf , build.properties config.
  • classcastexception thrown.

it great if has solution problem or inputs on can fix this.

thank in advance help/input provided.

you can't this. eclipse plugin system designed prevent accessing classes not exported.

including plugin jar in plugin use different class loader class loader , class cast exception.

the way access these classes other plugin modified export these classes.


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