anonymousclasses.jrag

JDK1.4编译器前端

/*
 * The JastAdd Extensible Java Compiler (http://jastadd.org) is covered
 * by the modified BSD License. You should have received a copy of the
 * modified BSD license with this compiler.
 * 
 * Copyright (c) 2005-2008, Torbjorn Ekman
 * All rights reserved.
 */

aspect AnonymousClasses {

  //eq ParameterDeclaration.getTypeAccess().hostType() = hostType().isAnonymous() ? ((ClassDecl)hostType()).superclass() : hostType();
  
  inh TypeDecl AnonymousDecl.superType();
  eq ClassInstanceExpr.getTypeDecl().superType() = getAccess().type();
  eq Program.getChild().superType() = null;

  inh ConstructorDecl AnonymousDecl.constructorDecl();
  eq ClassInstanceExpr.getTypeDecl().constructorDecl() {
    Collection c = getAccess().type().constructors();
    SimpleSet maxSpecific = mostSpecificConstructor(c);
    if(maxSpecific.size() == 1)
      return (ConstructorDecl)maxSpecific.iterator().next();
    return unknownConstructor();
  }
  eq Program.getChild().constructorDecl() = null;
  
  public int TypeDecl.anonymousIndex = 0;

  eq AnonymousDecl.isCircular() = false;

  syn lazy Opt AnonymousDecl.getSuperClassAccessOpt() {
    if(superType().isInterfaceDecl())
      return new Opt(typeObject().createQualifiedAccess());
    else
      return new Opt(superType().createBoundAccess());
  }
  syn lazy List AnonymousDecl.getImplementsList() {
    if(superType().isInterfaceDecl())
      return new List().add(superType().createBoundAccess());
    else
      return new List();
  }

  public int TypeDecl.nextAnonymousIndex() {
    if(isNestedType())
      return enclosingType().nextAnonymousIndex();
    return anonymousIndex++;
  }

  rewrite AnonymousDecl {
    when(noConstructor())
    to AnonymousDecl {
      setModifiers(new Modifiers(new List().add(new Modifier("final"))));
      
      ConstructorDecl constructor = new ConstructorDecl();
      addBodyDecl(constructor);

      constructor.setModifiers((Modifiers)constructorDecl().getModifiers().fullCopy());
      String name = "Anonymous" + nextAnonymousIndex();
      setID(name);
      constructor.setID(name);

      List parameterList = new List();
      for(int i = 0; i < constructorDecl().getNumParameter(); i++) {
        parameterList.add(
          new ParameterDeclaration(
            constructorDecl().getParameter(i).type().createBoundAccess(),
            constructorDecl().getParameter(i).name()
          )
        );
      }
      constructor.setParameterList(parameterList);
      
      List argList = new List();
      for(int i = 0; i < constructor.getNumParameter(); i++)
        argList.add(new VarAccess(constructor.getParameter(i).name()));
      constructor.setConstructorInvocation(
        new ExprStmt(
          new SuperConstructorAccess("super", argList)
        )
      );
      constructor.setBlock(new Block());

      HashSet set = new HashSet();
      for(int i = 0; i < getNumBodyDecl(); i++) {
        if(getBodyDecl(i) instanceof InstanceInitializer) {
          InstanceInitializer init = (InstanceInitializer)getBodyDecl(i);
          set.addAll(init.exceptions());
        }
        else if(getBodyDecl(i) instanceof FieldDeclaration) {
          FieldDeclaration f = (FieldDeclaration)getBodyDecl(i);
          if(f.isInstanceVariable()) {
            set.addAll(f.exceptions());
          }
        }
      }
      List exceptionList = new List();
      for(Iterator iter = set.iterator(); iter.hasNext(); ) {
        TypeDecl exceptionType = (TypeDecl)iter.next();
        if(exceptionType.isNull())
          exceptionType = typeNullPointerException();
        exceptionList.add(exceptionType.createQualifiedAccess());
      }
      constructor.setExceptionList(exceptionList);
      return this;
    }
  }
  inh TypeDecl AnonymousDecl.typeNullPointerException();


  syn lazy Collection FieldDeclaration.exceptions() {
    HashSet set = new HashSet();
    if(isInstanceVariable() && hasInit()) {
      collectExceptions(set, this);
      for(Iterator iter = set.iterator(); iter.hasNext(); ) {
        TypeDecl typeDecl = (TypeDecl)iter.next();
        if(!getInit().reachedException(typeDecl))
          iter.remove();
      }
    }
    return set;
  }

  syn lazy Collection InstanceInitializer.exceptions() {
    HashSet set = new HashSet();
    collectExceptions(set, this);
    for(Iterator iter = set.iterator(); iter.hasNext(); ) {
      TypeDecl typeDecl = (TypeDecl)iter.next();
      if(!getBlock().reachedException(typeDecl))
        iter.remove();
    }
    return set;
  }

  protected void ASTNode.collectExceptions(Collection c, ASTNode target) {
    for(int i = 0; i < getNumChild(); i++)
      getChild(i).collectExceptions(c, target);
  }

  protected void ThrowStmt.collectExceptions(Collection c, ASTNode target) {
    super.collectExceptions(c, target);
    TypeDecl exceptionType = getExpr().type();
    if(exceptionType == typeNull())
      exceptionType = typeNullPointerException();
    c.add(exceptionType);
  }

  protected void MethodAccess.collectExceptions(Collection c, ASTNode target) {
    super.collectExceptions(c, target);
    for(int i = 0; i < decl().getNumException(); i++)
      c.add(decl().getException(i).type());
  }

}