Remove access to deprecated PackageAdmin Access in activator

Adjusting the tests to used the bundleContext to access
org.eclipse.jdt.annotation, hence the initialization of the package
admin
can also be removed from the activator and therefore also the activator.

Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com>
Co-authored-by: Hannes Wellmann <wellmann.hannes1@gmx.net>

org.eclipse.jdt.core.tests.compiler/META-INF/MANIFEST.MF

@@ -27,6 +27,5 @@ Import-Package: jakarta.annotation;version="[2.1.0,3.0.0)",
  org.eclipse.jdt.internal.compiler.apt.dispatch
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Eclipse-BundleShape: dir
-Bundle-Activator: org.eclipse.jdt.core.tests.compiler.Activator
 Bundle-ActivationPolicy: lazy
 Automatic-Module-Name: org.eclipse.jdt.core.tests.compiler

org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/AbstractNullAnnotationTest.java

@@ -16,12 +16,14 @@
 import java.io.File;
 import java.io.IOException;
 import java.net.URL;
+import java.util.Arrays;
 import java.util.Map;
 import org.eclipse.core.runtime.FileLocator;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.jdt.core.JavaCore;
 import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
 import org.osgi.framework.Bundle;
+import org.osgi.framework.FrameworkUtil;
 
 @SuppressWarnings({ "unchecked", "rawtypes" })
 public abstract class AbstractNullAnnotationTest extends AbstractComparableTest {
@@ -81,16 +83,22 @@ protected void setUp() throws Exception {
 		setUpAnnotationLib();
 	}
 
-	/**
-	 * @deprecated indirectly uses deprecated class PackageAdmin
-	 */
 	protected void setUpAnnotationLib() throws IOException {
 		if (this.LIBS == null) {
 			String[] defaultLibs = getDefaultClassPaths();
 			int len = defaultLibs.length;
 			this.LIBS = new String[len+1];
 			System.arraycopy(defaultLibs, 0, this.LIBS, 0, len);
 			this.LIBS[len] = getAnnotationLibPath();
+
+			Bundle[] bundles = FrameworkUtil.getBundle(this.getClass()).getBundleContext().getBundles();
+			File bundleFile = Arrays.stream(bundles)
+					.filter(b -> "org.eclipse.jdt.annotation".equals(b.getSymbolicName())) //
+					.findFirst().flatMap(FileLocator::getBundleFileLocation).orElseThrow();
+			if (bundleFile.isDirectory())
+				this.LIBS[len] = bundleFile.getPath()+"/bin";
+			else
+				this.LIBS[len] = bundleFile.getPath();
 		}
 	}