content: /*
   * Copyright (c) 2009, 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 openjdk.tools.javap;
  
  import openjdk.tools.classfile.Attribute;
  import openjdk.tools.classfile.Code_attribute;
  import openjdk.tools.classfile.TypeAnnotation;
  import openjdk.tools.classfile.TypeAnnotation.Position;
  import openjdk.tools.classfile.Instruction;
  import openjdk.tools.classfile.Method;
  import openjdk.tools.classfile.RuntimeInvisibleTypeAnnotations_attribute;
  import openjdk.tools.classfile.RuntimeTypeAnnotations_attribute;
  import openjdk.tools.classfile.RuntimeVisibleTypeAnnotations_attribute;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import openjdk.tools.javac.util.StringUtils;
  
  /**
   * Annotate instructions with details about type annotations.
   *
   *  <p><b>This is NOT part of any supported API.
   *  If you write code that depends on this, you do so at your own risk.
   *  This code and its internal interfaces are subject to change or
   *  deletion without notice.</b>
   */
  public class TypeAnnotationWriter extends InstructionDetailWriter {
      public enum NoteKind { VISIBLE, INVISIBLE }
  
      public static class Note {
          Note(NoteKind kind, TypeAnnotation anno) {
              this.kind = kind;
              this.anno = anno;
          }
          public final NoteKind kind;
          public final TypeAnnotation anno;
      }
  
      static TypeAnnotationWriter instance(Context context) {
          TypeAnnotationWriter instance = context.get(TypeAnnotationWriter.class);
          if (instance == null)
              instance = new TypeAnnotationWriter(context);
          return instance;
      }
  
      protected TypeAnnotationWriter(Context context) {
          super(context);
          context.put(TypeAnnotationWriter.class, this);
          annotationWriter = AnnotationWriter.instance(context);
          classWriter = ClassWriter.instance(context);
      }
  
      public void reset(Code_attribute attr) {
          Method m = classWriter.getMethod();
          pcMap = new HashMap<>();
          check(NoteKind.VISIBLE, (RuntimeVisibleTypeAnnotations_attribute) m.attributes.get(Attribute.RuntimeVisibleTypeAnnotations));
          check(NoteKind.INVISIBLE, (RuntimeInvisibleTypeAnnotations_attribute) m.attributes.get(Attribute.RuntimeInvisibleTypeAnnotations));
      }
  
      private void check(NoteKind kind, RuntimeTypeAnnotations_attribute attr) {
          if (attr == null)
              return;
  
          for (TypeAnnotation anno: attr.annotations) {
              Position p = anno.position;
              Note note = null;
              if (p.offset != -1)
                  addNote(p.offset, note = new Note(kind, anno));
              if (p.lvarOffset != null) {
                  for (int i = 0; i < p.lvarOffset.length; i++) {
                      if (note == null)
                          note = new Note(kind, anno);
                      addNote(p.lvarOffset[i], note);
                  }
              }
          }
      }
  
      private void addNote(int pc, Note note) {
          List<Note> list = pcMap.get(pc);
          if (list == null)
              pcMap.put(pc, list = new ArrayList<>());
          list.add(note);
      }
  
      @Override
      void writeDetails(Instruction instr) {
          String indent = space(2); // get from Options?
          int pc = instr.getPC();
          List<Note> notes = pcMap.get(pc);
          if (notes != null) {
              for (Note n: notes) {
                  print(indent);
                  print("@");
                  annotationWriter.write(n.anno, false, true);
                  print(", ");
                  println(StringUtils.toLowerCase(n.kind.toString()));
              }
          }
      }
  
      private AnnotationWriter annotationWriter;
      private ClassWriter classWriter;
      private Map<Integer, List<Note>> pcMap;
  }
  