eclipse 如何在 equinox 中获取包的类加载器？
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How to get classloader for a bundle in equinox?
提问by Suraj Chandran
I have read a lot of equinox code for this, but still can't figure out a non-hacky way of getting the classloader for a osgi bundle in eclipse equinox setup. Is there one?
我已经为此阅读了很多 equinox 代码，但仍然无法找出在 eclipse equinox 设置中获取 osgi 包的类加载器的非hacky 方法。有吗？
采纳答案by SteveD
The short answer (certainly for OSGi 4.1, not sure of 4.2) is you can't get a bundle's classloader. However the Bundleinterface exposes a loadClass()method and this would allow you to write a classloader that wraps the bundle API and delegates to that loadClass()method. Or you can save some time and use Spring DM's BundleDelegatingClassLoaderclass instead.
简短的回答（当然对于 OSGi 4.1，不确定 4.2）是你不能得到一个包的类加载器。然而，该Bundle接口公开了一个loadClass()方法，这将允许您编写一个类加载器来包装捆绑 API 并委托给该loadClass()方法。或者您可以节省一些时间并改用 Spring DM 的BundleDelegatingClassLoader类。
回答by Balazs Zsoldos
In OSGi 4.3 you can use:
在 OSGi 4.3 中，您可以使用：
bundle.adapt(BundleWiring.class).getClassLoader()
回答by tux2323
The class loader of a bundle can be obtained through the BundleWiring interface. Here a short example:
bundle的类加载器可以通过BundleWiring接口获取。这里有一个简短的例子：
Bundle bundle = bundleContext.getBundle();
BundleWiring bundleWiring = bundle.adapt(BundleWiring.class);
ClassLoader classLoader = bundleWiring.getClassLoader();
回答by Andrew Niefer
In normal java code, you can get the class loader that loaded a given object with
在普通的java代码中，你可以得到加载给定对象的类加载器
object.getClass().getClassLoader();
Or even just
或者甚至只是
SomeType.class.getClassLoader();
The same applies to Equinox, just use an object or type that comes from the bundle you are interested in.
这同样适用于 Equinox，只需使用您感兴趣的包中的对象或类型即可。
