jdk8-mips64-public/langtools: src/share/classes/javax/annotation/processing/AbstractProcessor.java@330b35b27e68 (annotated)

src/share/classes/javax/annotation/processing/AbstractProcessor.java@330b35b27e68 (annotated)

src/share/classes/javax/annotation/processing/AbstractProcessor.java

Tue, 26 Mar 2013 17:17:14 -0700

author: darcy
date: Tue, 26 Mar 2013 17:17:14 -0700
changeset 1664: 330b35b27e68
parent 554: 9d9f26857129
child 1876: 1908e86ee49a
permissions: -rw-r--r--

7041251: Use j.u.Objects utility methods in langtools
Reviewed-by: jjg

 /*
  * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package javax.annotation.processing;
 import java.util.Set;
 import java.util.HashSet;
 import java.util.Collections;
 import java.util.Objects;
 import javax.lang.model.element.*;
 import javax.lang.model.SourceVersion;
 import javax.tools.Diagnostic;
 /**
  * An abstract annotation processor designed to be a convenient
  * superclass for most concrete annotation processors.  This class
  * examines annotation values to compute the {@linkplain
  * #getSupportedOptions options}, {@linkplain
  * #getSupportedAnnotationTypes annotations}, and {@linkplain
  * #getSupportedSourceVersion source version} supported by its
  * subtypes.
  *
  * <p>The getter methods may {@linkplain Messager#printMessage issue
  * warnings} about noteworthy conditions using the facilities available
  * after the processor has been {@linkplain #isInitialized
  * initialized}.
  *
  * <p>Subclasses are free to override the implementation and
  * specification of any of the methods in this class as long as the
  * general {@link javax.annotation.processing.Processor Processor}
  * contract for that method is obeyed.
  *
  * @author Joseph D. Darcy
  * @author Scott Seligman
  * @author Peter von der Ah&eacute;
  * @since 1.6
  */
 public abstract class AbstractProcessor implements Processor {
     /**
      * Processing environment providing by the tool framework.
      */
     protected ProcessingEnvironment processingEnv;
     private boolean initialized = false;
     /**
      * Constructor for subclasses to call.
      */
     protected AbstractProcessor() {}
     /**
      * If the processor class is annotated with {@link
      * SupportedOptions}, return an unmodifiable set with the same set
      * of strings as the annotation.  If the class is not so
      * annotated, an empty set is returned.
      *
      * @return the options recognized by this processor, or an empty
      * set if none
      */
     public Set<String> getSupportedOptions() {
         SupportedOptions so = this.getClass().getAnnotation(SupportedOptions.class);
         if  (so == null)
             return Collections.emptySet();
         else
             return arrayToSet(so.value());
     }
     /**
      * If the processor class is annotated with {@link
      * SupportedAnnotationTypes}, return an unmodifiable set with the
      * same set of strings as the annotation.  If the class is not so
      * annotated, an empty set is returned.
      *
      * @return the names of the annotation types supported by this
      * processor, or an empty set if none
      */
     public Set<String> getSupportedAnnotationTypes() {
             SupportedAnnotationTypes sat = this.getClass().getAnnotation(SupportedAnnotationTypes.class);
             if  (sat == null) {
                 if (isInitialized())
                     processingEnv.getMessager().printMessage(Diagnostic.Kind.WARNING,
                                                              "No SupportedAnnotationTypes annotation " +
                                                              "found on " + this.getClass().getName() +
                                                              ", returning an empty set.");
                 return Collections.emptySet();
             }
             else
                 return arrayToSet(sat.value());
         }
     /**
      * If the processor class is annotated with {@link
      * SupportedSourceVersion}, return the source version in the
      * annotation.  If the class is not so annotated, {@link
      * SourceVersion#RELEASE_6} is returned.
      *
      * @return the latest source version supported by this processor
      */
     public SourceVersion getSupportedSourceVersion() {
         SupportedSourceVersion ssv = this.getClass().getAnnotation(SupportedSourceVersion.class);
         SourceVersion sv = null;
         if (ssv == null) {
             sv = SourceVersion.RELEASE_6;
             if (isInitialized())
                 processingEnv.getMessager().printMessage(Diagnostic.Kind.WARNING,
                                                          "No SupportedSourceVersion annotation " +
                                                          "found on " + this.getClass().getName() +
                                                          ", returning " + sv + ".");
         } else
             sv = ssv.value();
         return sv;
     }
     /**
      * Initializes the processor with the processing environment by
      * setting the {@code processingEnv} field to the value of the
      * {@code processingEnv} argument.  An {@code
      * IllegalStateException} will be thrown if this method is called
      * more than once on the same object.
      *
      * @param processingEnv environment to access facilities the tool framework
      * provides to the processor
      * @throws IllegalStateException if this method is called more than once.
      */
     public synchronized void init(ProcessingEnvironment processingEnv) {
         if (initialized)
             throw new IllegalStateException("Cannot call init more than once.");
         Objects.requireNonNull(processingEnv, "Tool provided null ProcessingEnvironment");
         this.processingEnv = processingEnv;
         initialized = true;
     }
     /**
      * {@inheritDoc}
      */
     public abstract boolean process(Set<? extends TypeElement> annotations,
                                     RoundEnvironment roundEnv);
     /**
      * Returns an empty iterable of completions.
      *
      * @param element {@inheritDoc}
      * @param annotation {@inheritDoc}
      * @param member {@inheritDoc}
      * @param userText {@inheritDoc}
      */
     public Iterable<? extends Completion> getCompletions(Element element,
                                                          AnnotationMirror annotation,
                                                          ExecutableElement member,
                                                          String userText) {
         return Collections.emptyList();
     }
     /**
      * Returns {@code true} if this object has been {@linkplain #init
      * initialized}, {@code false} otherwise.
      *
      * @return {@code true} if this object has been initialized,
      * {@code false} otherwise.
      */
     protected synchronized boolean isInitialized() {
         return initialized;
     }
     private static Set<String> arrayToSet(String[] array) {
         assert array != null;
         Set<String> set = new HashSet<String>(array.length);
         for (String s : array)
             set.add(s);
         return Collections.unmodifiableSet(set);
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/javax/annotation/processing/AbstractProcessor.java@330b35b27e68 (annotated)

src/share/classes/javax/annotation/processing/AbstractProcessor.java