bundles/org.simantics.scl.osgi/src/org/simantics/scl/osgi/internal/OsgiJavaReferenceValidatorFactory.java

   1 package org.simantics.scl.osgi.internal;
   2
   3 import org.osgi.framework.Bundle;
   4 import org.osgi.framework.BundleContext;
   5 import org.osgi.framework.wiring.BundleWiring;
   6 import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;
   7 import org.simantics.scl.compiler.internal.codegen.types.JavaReferenceValidator;
   8 import org.simantics.scl.compiler.internal.codegen.types.JavaReferenceValidatorFactory;
   9 import org.simantics.scl.compiler.internal.codegen.types.RuntimeJavaReferenceValidator;
  10 import org.simantics.scl.compiler.types.Type;
  11
  12 public class OsgiJavaReferenceValidatorFactory implements JavaReferenceValidatorFactory {
  13
  14     private final Bundle bundle;
  15
  16     public OsgiJavaReferenceValidatorFactory(Bundle bundle) {
  17         this.bundle = bundle;
  18     }
  19
  20     private static ClassLoader getClassLoader(Bundle bundle) {
  21         if(bundle.getSymbolicName().equals("org.simantics.scl.runtime"))
  22             return Type.class.getClassLoader();
  23         else {
  24             BundleWiring wiring = bundle.adapt(BundleWiring.class);
  25             if(wiring != null)
  26                 return wiring.getClassLoader();
  27             throw new InternalCompilerError("Cannot get the class loader for bundle " + bundle.getSymbolicName() + ".");
  28         }
  29     }
  30
  31     private static JavaReferenceValidator<Object, Object, Object, Object> getJavaReferenceValidator(Bundle bundle) {
  32         if(bundle == null)
  33             return null;
  34         return (JavaReferenceValidator<Object, Object, Object, Object>)
  35                 (JavaReferenceValidator<?, ?, ?, ?>)new RuntimeJavaReferenceValidator(getClassLoader(bundle));
  36     }
  37
  38     private static Bundle getBundle(BundleContext bundleContext, String symbolicName) {
  39         Bundle result = null;
  40         for (Bundle candidate : bundleContext.getBundles())
  41             if (candidate.getSymbolicName().equals(symbolicName))
  42                 if (result == null || result.getVersion().compareTo(candidate.getVersion()) < 0)
  43                     result = candidate;
  44         return result;
  45     }
  46
  47     @Override
  48     public JavaReferenceValidator<Object, Object, Object, Object> getJavaReferenceValidator(String bundleName) {
  49         System.out.println("getJavaReferenceValidator(" + bundleName + ")");
  50         return getJavaReferenceValidator(getBundle(bundle.getBundleContext(), bundleName));
  51     }
  52
  53     @Override
  54     public JavaReferenceValidator<Object, Object, Object, Object> getDefaultJavaReferenceValidator() {
  55         return getJavaReferenceValidator(bundle);
  56     }
  57
  58 }