如何从另一个OSGibundle中使用一个OSGibundle中的**CSS**资源文件

Question

我的项目目录结构（在Eclipse中）：

MyProjectContainingCSS/
    src/        --> "source directory" on Eclipse's classpath/buildpath
        com.me.myapp
            style.css

MyProjectInheritingCSS/
    src/        --> "source directory" on Eclipse's classpath/buildpath
        com.me.myapp
            StyleImpl.java

我想在CSS文件中使用style.CSS，该文件包含在类StyleImpl.java中的另一个OSGi捆绑包MyProjectContainingCSS中的OSGi捆绑束MyProjectContainingCSS中，

类似于：

public class StyleImpl {
    public static void main(String[] args) {
        css = this.getClass().getResource("/com/me/myapp/style.css").toExternalForm();
        scene.getStylesheets().add(css);
    }
}

如何在一个OSGi捆绑包中使用CSS资源文件？

提前谢谢大家。

更新

bnd.bnd文件

Bundle-Version: 0.0.0.${tstamp}
-buildpath: 
    ../cnf/plugins/org.apache.felix.dependencymanager.annotation-3.2.0.jar;version=file,
    org.apache.felix.dependencymanager,
    osgi.core,
    launcher;version=latest,
    libs/commons-io-2.4.jar;version=file
Private-Package: ui.impl
Export-Package: ui
Import-Package: *

运行描述符

-runfw: org.apache.felix.framework;version='[4,5)'
-runee: JavaSE-1.8
-runsystemcapabilities: ${native_capability}
-resolve.effective: active;skip:="osgi.service"
-runbundles: 
    org.apache.felix.dependencymanager,
    org.apache.felix.dependencymanager.runtime,
    org.apache.felix.dependencymanager.shell,
    org.apache.felix.metatype,
    org.apache.felix.eventadmin,
    org.apache.felix.configadmin,
    org.apache.felix.log,
    org.apache.felix.gogo.command,
    org.apache.felix.gogo.runtime,
    org.apache.felix.gogo.shell,
    launcher;version=latest,
    ui;version=latest,
    mainscreen;version=latest
-runsystempackages: javafx.application,javafx.scene,javafx.stage,javafx.scene.layout,javafx.event,javafx.collections,javafx.scene.control,javafx.scene.paint,javafx.scene.shape

Answer 1

要从自己的捆绑包中获取文件，可以执行以下操作：

Bundle bundle = FrameworkUtil.getBundle(this.getClass());
Enumeration<URL> resources = bundle.getResources("/com/me/myapp/style.css");   
if (resources != null) {
    URL myCSS = resources.nextElement();
}            

如果你能找到另一个OSGi捆绑包对象，你也可以这样做。我会试试这样的东西：

    Bundle bundle = FrameworkUtil.getBundle(this.getClass());
    Bundle[] bArray = bundle.getBundleContext().getBundles();
    Bundle cssBundle = null;
    for (Bundle b : bArray){
        if(b.getSymbolicName().equals("com.me.myapp")) {
            cssBundle = b;
            break; 
        }
    }
    Enumeration<URL> resources = cssBundle.getResources("/com/me/myapp/style.css");   
    if (resources != null) {
        URL myCSS = resources.nextElement();
    }