6575445: Update annotation processor to only use java.util.ServiceLoader

Reviewed-by: jjg

src/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java

@@ -295,59 +295,24 @@ public class JavacProcessingEnvironment implements ProcessingEnvironment, Closea
 
     /**
      * Use a service loader appropriate for the platform to provide an
-     * iterator over annotations processors.  If
-     * java.util.ServiceLoader is present use it, otherwise, use
-     * sun.misc.Service, otherwise fail if a loader is needed.
+     * iterator over annotations processors; fails if a loader is
+     * needed but unavailable.
      */
     private class ServiceIterator implements Iterator<Processor> {
-        // The to-be-wrapped iterator.
-        private Iterator<?> iterator;
+        private Iterator<Processor> iterator;
         private Log log;
-        private Class<?> loaderClass;
-        private boolean jusl;
-        private Object loader;
+        private ServiceLoader<Processor> loader;
 
         ServiceIterator(ClassLoader classLoader, Log log) {
-            String loadMethodName;
-
             this.log = log;
             try {
                 try {
-                    loaderClass = Class.forName("java.util.ServiceLoader");
-                    loadMethodName = "load";
-                    jusl = true;
-                } catch (ClassNotFoundException cnfe) {
-                    try {
-                        loaderClass = Class.forName("sun.misc.Service");
-                        loadMethodName = "providers";
-                        jusl = false;
-                    } catch (ClassNotFoundException cnfe2) {
-                        // Fail softly if a loader is not actually needed.
-                        this.iterator = handleServiceLoaderUnavailability("proc.no.service",
-                                                                          null);
-                        return;
-                    }
-                }
-
-                // java.util.ServiceLoader.load or sun.misc.Service.providers
-                Method loadMethod = loaderClass.getMethod(loadMethodName,
-                                                          Class.class,
-                                                          ClassLoader.class);
-
-                Object result = loadMethod.invoke(null,
-                                                  Processor.class,
-                                                  classLoader);
-
-                // For java.util.ServiceLoader, we have to call another
-                // method to get the iterator.
-                if (jusl) {
-                    loader = result; // Store ServiceLoader to call reload later
-                    Method m = loaderClass.getMethod("iterator");
-                    result = m.invoke(result); // serviceLoader.iterator();
+                    loader = ServiceLoader.load(Processor.class, classLoader);
+                    this.iterator = loader.iterator();
+                } catch (Exception e) {
+                    // Fail softly if a loader is not actually needed.
+                    this.iterator = handleServiceLoaderUnavailability("proc.no.service", null);
                 }
-
-                // The result should now be an iterator.
-                this.iterator = (Iterator<?>) result;
             } catch (Throwable t) {
                 log.error("proc.service.problem");
                 throw new Abort(t);
@@ -357,25 +322,21 @@ public class JavacProcessingEnvironment implements ProcessingEnvironment, Closea
         public boolean hasNext() {
             try {
                 return iterator.hasNext();
+            } catch(ServiceConfigurationError sce) {
+                log.error("proc.bad.config.file", sce.getLocalizedMessage());
+                throw new Abort(sce);
             } catch (Throwable t) {
-                if ("ServiceConfigurationError".
-                    equals(t.getClass().getSimpleName())) {
-                    log.error("proc.bad.config.file", t.getLocalizedMessage());
-                }
                 throw new Abort(t);
             }
         }
 
         public Processor next() {
             try {
-                return (Processor)(iterator.next());
+                return iterator.next();
+            } catch (ServiceConfigurationError sce) {
+                log.error("proc.bad.config.file", sce.getLocalizedMessage());
+                throw new Abort(sce);
             } catch (Throwable t) {
-                if ("ServiceConfigurationError".
-                    equals(t.getClass().getSimpleName())) {
-                    log.error("proc.bad.config.file", t.getLocalizedMessage());
-                } else {
-                    log.error("proc.processor.constructor.error", t.getLocalizedMessage());
-                }
                 throw new Abort(t);
             }
         }
@@ -385,11 +346,9 @@ public class JavacProcessingEnvironment implements ProcessingEnvironment, Closea
         }
 
         public void close() {
-            if (jusl) {
+            if (loader != null) {
                 try {
-                    // Call java.util.ServiceLoader.reload
-                    Method reloadMethod = loaderClass.getMethod("reload");
-                    reloadMethod.invoke(loader);
+                    loader.reload();
                 } catch(Exception e) {
                     ; // Ignore problems during a call to reload.
                 }

src/share/classes/com/sun/tools/javac/resources/compiler.properties

@@ -637,8 +637,7 @@ compiler.err.proc.no.explicit.annotation.processing.requested=\
     Class names, ''{0}'', are only accepted if annotation processing is explicitly requested
 
 compiler.err.proc.no.service=\
-    A service loader class could not be found.\n\
-    Either java.util.ServiceLoader or sun.misc.Service must be available.
+    A ServiceLoader was not usable and is required for annotation processing.
 
 compiler.err.proc.processor.bad.option.name=\
     Bad option name ''{0}'' provided by processor ''{1}''
@@ -647,9 +646,6 @@ compiler.err.proc.processor.bad.option.name=\
 compiler.err.proc.processor.cant.instantiate=\
     Could not instantiate an instance of processor ''{0}''
 
-compiler.err.proc.processor.constructor.error=\
-    Exception thrown while constructing Processor object: {0}
-
 # 0: string
 compiler.err.proc.processor.not.found=\
     Annotation processor ''{0}'' not found

test/tools/javac/diags/examples.not-yet.txt

@@ -31,7 +31,6 @@ compiler.err.proc.cant.access.1                         # completion failure, no
 compiler.err.proc.cant.create.loader                    # security exception from service loader
 compiler.err.proc.no.service                            # JavacProcessingEnvironment: no service loader available
 compiler.err.proc.processor.bad.option.name             # cannot happen? masked by javac.err.invalid.A.key
-compiler.err.proc.processor.constructor.error
 compiler.err.proc.service.problem                       # JavacProcessingEnvironment: catch Throwable from service loader
 compiler.err.signature.doesnt.match.intf                # UNUSED
 compiler.err.signature.doesnt.match.supertype           # UNUSED