content: /*
   * Copyright (c) 2007, 2017, 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.Annotation;
  import openjdk.tools.classfile.TypeAnnotation;
  import openjdk.tools.classfile.Annotation.Annotation_element_value;
  import openjdk.tools.classfile.Annotation.Array_element_value;
  import openjdk.tools.classfile.Annotation.Class_element_value;
  import openjdk.tools.classfile.Annotation.Enum_element_value;
  import openjdk.tools.classfile.Annotation.Primitive_element_value;
  import openjdk.tools.classfile.ConstantPool;
  import openjdk.tools.classfile.ConstantPoolException;
  import openjdk.tools.classfile.Descriptor;
  import openjdk.tools.classfile.Descriptor.InvalidDescriptor;
  
  /**
   *  A writer for writing annotations as text.
   *
   *  <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 AnnotationWriter extends BasicWriter {
      static AnnotationWriter instance(Context context) {
          AnnotationWriter instance = context.get(AnnotationWriter.class);
          if (instance == null)
              instance = new AnnotationWriter(context);
          return instance;
      }
  
      protected AnnotationWriter(Context context) {
          super(context);
          classWriter = ClassWriter.instance(context);
          constantWriter = ConstantWriter.instance(context);
      }
  
      public void write(Annotation annot) {
          write(annot, false);
          println();
          indent(+1);
          write(annot, true);
          indent(-1);
      }
  
      public void write(Annotation annot, boolean resolveIndices) {
          writeDescriptor(annot.type_index, resolveIndices);
          if (resolveIndices) {
              boolean showParens = annot.num_element_value_pairs > 0;
              if (showParens) {
                  println("(");
                  indent(+1);
              }
              for (int i = 0; i < annot.num_element_value_pairs; i++) {
                  write(annot.element_value_pairs[i], true);
                  println();
              }
              if (showParens) {
                  indent(-1);
                  print(")");
              }
          } else {
              print("(");
              for (int i = 0; i < annot.num_element_value_pairs; i++) {
                  if (i > 0)
                      print(",");
                  write(annot.element_value_pairs[i], false);
              }
              print(")");
          }
      }
  
      public void write(TypeAnnotation annot) {
          write(annot, true, false);
          println();
          indent(+1);
          write(annot.annotation, true);
          indent(-1);
      }
  
      public void write(TypeAnnotation annot, boolean showOffsets, boolean resolveIndices) {
          write(annot.annotation, resolveIndices);
          print(": ");
          write(annot.position, showOffsets);
      }
  
      public void write(TypeAnnotation.Position pos, boolean showOffsets) {
          print(pos.type);
  
          switch (pos.type) {
          // instanceof
          case INSTANCEOF:
          // new expression
          case NEW:
          // constructor/method reference receiver
          case CONSTRUCTOR_REFERENCE:
          case METHOD_REFERENCE:
              if (showOffsets) {
                  print(", offset=");
                  print(pos.offset);
              }
              break;
          // local variable
          case LOCAL_VARIABLE:
          // resource variable
          case RESOURCE_VARIABLE:
              if (pos.lvarOffset == null) {
                  print(", lvarOffset is Null!");
                  break;
              }
              print(", {");
              for (int i = 0; i < pos.lvarOffset.length; ++i) {
                  if (i != 0) print("; ");
                  if (showOffsets) {
                      print("start_pc=");
                      print(pos.lvarOffset[i]);
                  }
                  print(", length=");
                  print(pos.lvarLength[i]);
                  print(", index=");
                  print(pos.lvarIndex[i]);
              }
              print("}");
              break;
          // exception parameter
          case EXCEPTION_PARAMETER:
              print(", exception_index=");
              print(pos.exception_index);
              break;
          // method receiver
          case METHOD_RECEIVER:
              // Do nothing
              break;
          // type parameter
          case CLASS_TYPE_PARAMETER:
          case METHOD_TYPE_PARAMETER:
              print(", param_index=");
              print(pos.parameter_index);
              break;
          // type parameter bound
          case CLASS_TYPE_PARAMETER_BOUND:
          case METHOD_TYPE_PARAMETER_BOUND:
              print(", param_index=");
              print(pos.parameter_index);
              print(", bound_index=");
              print(pos.bound_index);
              break;
          // class extends or implements clause
          case CLASS_EXTENDS:
              print(", type_index=");
              print(pos.type_index);
              break;
          // throws
          case THROWS:
              print(", type_index=");
              print(pos.type_index);
              break;
          // method parameter
          case METHOD_FORMAL_PARAMETER:
              print(", param_index=");
              print(pos.parameter_index);
              break;
          // type cast
          case CAST:
          // method/constructor/reference type argument
          case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
          case METHOD_INVOCATION_TYPE_ARGUMENT:
          case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
          case METHOD_REFERENCE_TYPE_ARGUMENT:
              if (showOffsets) {
                  print(", offset=");
                  print(pos.offset);
              }
              print(", type_index=");
              print(pos.type_index);
              break;
          // We don't need to worry about these
          case METHOD_RETURN:
          case FIELD:
              break;
          case UNKNOWN:
              throw new AssertionError("AnnotationWriter: UNKNOWN target type should never occur!");
          default:
              throw new AssertionError("AnnotationWriter: Unknown target type for position: " + pos);
          }
  
          // Append location data for generics/arrays.
          if (!pos.location.isEmpty()) {
              print(", location=");
              print(pos.location);
          }
      }
  
      public void write(Annotation.element_value_pair pair, boolean resolveIndices) {
          writeIndex(pair.element_name_index, resolveIndices);
          print("=");
          write(pair.value, resolveIndices);
      }
  
      public void write(Annotation.element_value value) {
          write(value, false);
          println();
          indent(+1);
          write(value, true);
          indent(-1);
      }
  
      public void write(Annotation.element_value value, boolean resolveIndices) {
          ev_writer.write(value, resolveIndices);
      }
  
      private void writeDescriptor(int index, boolean resolveIndices) {
          if (resolveIndices) {
              try {
                  ConstantPool constant_pool = classWriter.getClassFile().constant_pool;
                  Descriptor d = new Descriptor(index);
                  print(d.getFieldType(constant_pool));
                  return;
              } catch (ConstantPoolException | InvalidDescriptor ignore) {
              }
          }
  
          print("#" + index);
      }
  
      private void writeIndex(int index, boolean resolveIndices) {
          if (resolveIndices) {
              print(constantWriter.stringValue(index));
          } else
              print("#" + index);
      }
  
      element_value_Writer ev_writer = new element_value_Writer();
  
      class element_value_Writer implements Annotation.element_value.Visitor<Void,Boolean> {
          public void write(Annotation.element_value value, boolean resolveIndices) {
              value.accept(this, resolveIndices);
          }
  
          @Override
          public Void visitPrimitive(Primitive_element_value ev, Boolean resolveIndices) {
              if (resolveIndices) {
                  int index = ev.const_value_index;
                  switch (ev.tag) {
                      case 'B':
                          print("(byte) ");
                          print(constantWriter.stringValue(index));
                          break;
                      case 'C':
                          print("'");
                          print(constantWriter.charValue(index));
                          print("'");
                          break;
                      case 'D':
                      case 'F':
                      case 'I':
                      case 'J':
                          print(constantWriter.stringValue(index));
                          break;
                      case 'S':
                          print("(short) ");
                          print(constantWriter.stringValue(index));
                          break;
                      case 'Z':
                          print(constantWriter.booleanValue(index));
                          break;
                      case 's':
                          print("\"");
                          print(constantWriter.stringValue(index));
                          print("\"");
                          break;
                      default:
                          print(((char) ev.tag) + "#" + ev.const_value_index);
                          break;
                  }
              } else {
                  print(((char) ev.tag) + "#" + ev.const_value_index);
              }
              return null;
          }
  
          @Override
          public Void visitEnum(Enum_element_value ev, Boolean resolveIndices) {
              if (resolveIndices) {
                  writeIndex(ev.type_name_index, resolveIndices);
                  print(".");
                  writeIndex(ev.const_name_index, resolveIndices);
              } else {
                  print(((char) ev.tag) + "#" + ev.type_name_index + ".#" + ev.const_name_index);
              }
              return null;
          }
  
          @Override
          public Void visitClass(Class_element_value ev, Boolean resolveIndices) {
              if (resolveIndices) {
                  print("class ");
                  writeIndex(ev.class_info_index, resolveIndices);
              } else {
                  print(((char) ev.tag) + "#" + ev.class_info_index);
              }
              return null;
          }
  
          @Override
          public Void visitAnnotation(Annotation_element_value ev, Boolean resolveIndices) {
              print((char) ev.tag);
              AnnotationWriter.this.write(ev.annotation_value, resolveIndices);
              return null;
          }
  
          @Override
          public Void visitArray(Array_element_value ev, Boolean resolveIndices) {
              print("[");
              for (int i = 0; i < ev.num_values; i++) {
                  if (i > 0)
                      print(",");
                  write(ev.values[i], resolveIndices);
              }
              print("]");
              return null;
          }
  
      }
  
      private final ClassWriter classWriter;
      private final ConstantWriter constantWriter;
  }
  