Java Code Examples for com.sun.tools.javac.util.Names#instance()

private Symbol.MethodSymbol findFieldAccessReflectUtilMethod( JCTree tree, Type type, boolean isStatic, boolean setter )
{
  String name = (setter ? "set" : "get") + "Field" + (isStatic ? "Static" : "") + '_' + typeForReflect( type );

  Symtab symtab = _tp.getSymtab();
  List<Type> paramTypes;
  if( setter )
  {
    paramTypes = List.of( isStatic ? symtab.classType : symtab.objectType, symtab.stringType, type );
  }
  else
  {
    paramTypes = List.of( isStatic ? symtab.classType : symtab.objectType, symtab.stringType );
  }

  Names names = Names.instance( _tp.getContext() );
  Symbol.ClassSymbol reflectMethodClassSym =
    IDynamicJdk.instance().getTypeElement( _tp.getContext(), _tp.getCompilationUnit(), ReflectionRuntimeMethods.class.getName() );

  return resolveMethod( tree.pos(), names.fromString( name ), reflectMethodClassSym.type, paramTypes );
}
 

/** Enter a set of generated class files. */
private List<ClassSymbol> enterClassFiles(Map<String, JavaFileObject> classFiles) {
    ClassReader reader = ClassReader.instance(context);
    Names names = Names.instance(context);
    List<ClassSymbol> list = List.nil();

    for (Map.Entry<String,JavaFileObject> entry : classFiles.entrySet()) {
        Name name = names.fromString(entry.getKey());
        JavaFileObject file = entry.getValue();
        if (file.getKind() != JavaFileObject.Kind.CLASS)
            throw new AssertionError(file);
        ClassSymbol cs;
        if (isPkgInfo(file, JavaFileObject.Kind.CLASS)) {
            Name packageName = Convert.packagePart(name);
            PackageSymbol p = reader.enterPackage(packageName);
            if (p.package_info == null)
                p.package_info = reader.enterClass(Convert.shortName(name), p);
            cs = p.package_info;
            if (cs.classfile == null)
                cs.classfile = file;
        } else
            cs = reader.enterClass(name, file);
        list = list.prepend(cs);
    }
    return list.reverse();
}
 

@Test
public void testConvertNameCandidates(Path base) throws Exception {
    Context ctx = new Context();
    Names names = Names.instance(ctx);
    Name name = names.fromString("com.sun.tools.javac.Attr.BreakAttr");

    com.sun.tools.javac.util.List<String> actual =
            Convert.classCandidates(name).map(n -> n.toString());
    List<String> expected = Arrays.asList(
            "com.sun$tools$javac$Attr$BreakAttr",
            "com.sun.tools$javac$Attr$BreakAttr",
            "com.sun.tools.javac$Attr$BreakAttr",
            "com.sun.tools.javac.Attr$BreakAttr",
            "com.sun.tools.javac.Attr.BreakAttr"
    );

    if (!expected.equals(actual)) {
        throw new Exception("Expected names not generated: " + actual);
    }
}
 

public void run() {
    int id = checkCount.incrementAndGet();
    JavaSource source = new JavaSource(id);
    JavacTaskImpl ct = (JavacTaskImpl)comp.getTask(null, fm.get(), dc,
            Arrays.asList("-g"), null, Arrays.asList(source));
    Context context = ct.getContext();
    Symtab syms = Symtab.instance(context);
    Names names = Names.instance(context);
    Types types = Types.instance(context);
    ct.addTaskListener(new Indifier(syms, names, types));
    try {
        ct.generate();
    } catch (Throwable t) {
        t.printStackTrace();
        throw new AssertionError(
                String.format("Error thrown when compiling following code\n%s",
                source.source));
    }
    if (dc.diagFound) {
        throw new AssertionError(
                String.format("Diags found when compiling following code\n%s\n\n%s",
                source.source, dc.printDiags()));
    }
    verifyBytecode(id);
}
 

protected Enter(Context context) {
    context.put(enterKey, this);

    log = Log.instance(context);
    reader = ClassReader.instance(context);
    make = TreeMaker.instance(context);
    syms = Symtab.instance(context);
    chk = Check.instance(context);
    memberEnter = MemberEnter.instance(context);
    types = Types.instance(context);
    annotate = Annotate.instance(context);
    lint = Lint.instance(context);
    names = Names.instance(context);

    predefClassDef = make.ClassDef(
        make.Modifiers(PUBLIC),
        syms.predefClass.name, null, null, null, null);
    predefClassDef.sym = syms.predefClass;
    todo = Todo.instance(context);
    fileManager = context.get(JavaFileManager.class);

    Options options = Options.instance(context);
    pkginfoOpt = PkgInfo.get(options);
}
 

@Override
public void visitSelect( JCTree.JCFieldAccess jcFieldAccess )
{
  super.visitSelect( jcFieldAccess );
  Names names = Names.instance( _javacTask.getContext() );
  jcFieldAccess.name = names.fromString( jcFieldAccess.name.toString() );
  jcFieldAccess.pos = _offset;
}
 

private void init(Context context) {
    attr = Attr.instance(context);
    enter = Enter.instance(context);
    elements = JavacElements.instance(context);
    log = Log.instance(context);
    resolve = Resolve.instance(context);
    treeMaker = TreeMaker.instance(context);
    memberEnter = MemberEnter.instance(context);
    names = Names.instance(context);
    types = Types.instance(context);

    JavacTask t = context.get(JavacTask.class);
    if (t instanceof JavacTaskImpl)
        javacTaskImpl = (JavacTaskImpl) t;
}
 

protected ParserFactory(Context context) {
    super();
    context.put(parserFactoryKey, this);
    this.F = TreeMaker.instance(context);
    this.log = Log.instance(context);
    this.names = Names.instance(context);
    this.keywords = Keywords.instance(context);
    this.source = Source.instance(context);
    this.options = Options.instance(context);
    this.scannerFactory = ScannerFactory.instance(context);
}
 

private Corraller(StringWriter out, int keyIndex, Context context) {
    super(out, false);
    this.out = out;
    this.keyIndex = keyIndex;
    this.make = TreeMaker.instance(context);
    this.names = Names.instance(context);
}
 

protected ParserFactory(Context context) {
    super();
    context.put(parserFactoryKey, this);
    this.F = TreeMaker.instance(context);
    this.docTreeMaker = DocTreeMaker.instance(context);
    this.log = Log.instance(context);
    this.names = Names.instance(context);
    this.tokens = Tokens.instance(context);
    this.source = Source.instance(context);
    this.options = Options.instance(context);
    this.scannerFactory = ScannerFactory.instance(context);
    this.locale = context.get(Locale.class);
}
 

/** Create a new scanner factory. */
protected ScannerFactory(Context context) {
    context.put(scannerFactoryKey, this);
    this.log = Log.instance(context);
    this.names = Names.instance(context);
    this.source = Source.instance(context);
    this.tokens = Tokens.instance(context);
}
 

protected Types(Context context) {
    context.put(typesKey, this);
    syms = Symtab.instance(context);
    names = Names.instance(context);
    Source source = Source.instance(context);
    allowBoxing = source.allowBoxing();
    allowCovariantReturns = source.allowCovariantReturns();
    allowObjectToPrimitiveCast = source.allowObjectToPrimitiveCast();
    reader = ClassReader.instance(context);
    chk = Check.instance(context);
    capturedName = names.fromString("<captured wildcard>");
    messages = JavacMessages.instance(context);
}
 

private void init(Context context) {
    attr = Attr.instance(context);
    enter = Enter.instance(context);
    elements = JavacElements.instance(context);
    log = Log.instance(context);
    resolve = Resolve.instance(context);
    treeMaker = TreeMaker.instance(context);
    memberEnter = MemberEnter.instance(context);
    names = Names.instance(context);
    types = Types.instance(context);

    JavacTask t = context.get(JavacTask.class);
    if (t instanceof JavacTaskImpl)
        javacTaskImpl = (JavacTaskImpl) t;
}
 

protected Enter(Context context) {
    context.put(enterKey, this);

    log = Log.instance(context);
    make = TreeMaker.instance(context);
    syms = Symtab.instance(context);
    chk = Check.instance(context);
    typeEnter = TypeEnter.instance(context);
    types = Types.instance(context);
    annotate = Annotate.instance(context);
    lint = Lint.instance(context);
    names = Names.instance(context);
    modules = Modules.instance(context);
    diags = JCDiagnostic.Factory.instance(context);

    predefClassDef = make.ClassDef(
        make.Modifiers(PUBLIC),
        syms.predefClass.name,
        List.nil(),
        null,
        List.nil(),
        List.nil());
    predefClassDef.sym = syms.predefClass;
    todo = Todo.instance(context);
    fileManager = context.get(JavaFileManager.class);

    Options options = Options.instance(context);
    pkginfoOpt = PkgInfo.get(options);
    typeEnvs = TypeEnvs.instance(context);
}
 

private void init(Context context) {
    attr = Attr.instance(context);
    enter = Enter.instance(context);
    elements = JavacElements.instance(context);
    log = Log.instance(context);
    resolve = Resolve.instance(context);
    treeMaker = TreeMaker.instance(context);
    memberEnter = MemberEnter.instance(context);
    names = Names.instance(context);
    types = Types.instance(context);

    JavacTask t = context.get(JavacTask.class);
    if (t instanceof JavacTaskImpl)
        javacTaskImpl = (JavacTaskImpl) t;
}
 

public List<JCTree.JCExpression> parse( String stringValue, int literalOffset )
{
  List<StringLiteralTemplateParser.Expr> comps =
    StringLiteralTemplateParser.parse( new EscapeMatcher( _manDiagnosticHandler, literalOffset+1 ), stringValue );
  if( comps.isEmpty() )
  {
    return Collections.emptyList();
  }

  TreeMaker maker = TreeMaker.instance( _javacTask.getContext() );
  Names names = Names.instance( _javacTask.getContext() );

  List<JCTree.JCExpression> exprs = new ArrayList<>();
  StringLiteralTemplateParser.Expr prev = null;
  for( StringLiteralTemplateParser.Expr comp : comps )
  {
    JCTree.JCExpression expr;
    if( comp.isVerbatim() )
    {
      expr = maker.Literal( comp.getExpr() );
    }
    else
    {
      if( prev != null && !prev.isVerbatim() )
      {
        // enforce concatenation
        exprs.add( maker.Literal( "" ) );
      }

      int exprPos = literalOffset + 1 + comp.getOffset();

      if( comp.isIdentifier() )
      {
        JCTree.JCIdent ident = maker.Ident( names.fromString( comp.getExpr() ) );
        ident.pos = exprPos;
        expr = ident;
      }
      else
      {
        DiagnosticCollector<JavaFileObject> errorHandler = new DiagnosticCollector<>();
        expr = _tp.getHost().getJavaParser().parseExpr( comp.getExpr(), errorHandler );
        if( transferParseErrors( literalOffset, comp, expr, errorHandler ) )
        {
          return Collections.emptyList();
        }
        replaceNames( expr, exprPos );
      }
    }
    prev = comp;
    exprs.add( expr );
  }

  if( exprs.size() == 1 )
  {
    // insert an empty string so concat will make the expr a string
    exprs.add( 0, maker.Literal( "" ) );
  }

  return exprs;
}
 

public Names names() {
  return Names.instance(context);
}
 

void test(String testName, boolean expectNames, String... opts) throws Exception {
    System.err.println("Test " + testName
            + ": expectNames:" + expectNames
            + " javacOpts:" + Arrays.asList(opts));

    File outDir = new File(testName);
    outDir.mkdirs();
    compile(outDir, opts);

    Context ctx = new Context();
    JavacFileManager fm = new JavacFileManager(ctx, true, null);
    fm.setLocation(StandardLocation.CLASS_PATH, Arrays.asList(outDir));
    Symtab syms = Symtab.instance(ctx);
    ClassReader cr = ClassReader.instance(ctx);
    cr.saveParameterNames = true;
    Names names = Names.instance(ctx);

    Set<String> classes = getTopLevelClasses(outDir);
    Deque<String> work = new LinkedList<String>(classes);
    String classname;
    while ((classname = work.poll()) != null) {
        System.err.println("Checking class " + classname);
        ClassSymbol sym = syms.enterClass(syms.noModule, names.table.fromString(classname));
        sym.complete();

        if ((sym.flags() & Flags.INTERFACE) != 0 && !testInterfaces)
            continue;

        for (Symbol s : sym.members_field.getSymbols(NON_RECURSIVE)) {
            System.err.println("Checking member " + s);
            switch (s.kind) {
                case TYP: {
                    String name = s.flatName().toString();
                    if (!classes.contains(name)) {
                        classes.add(name);
                        work.add(name);
                    }
                    break;
                }
                case MTH:
                    verify((MethodSymbol) s, expectNames);
                    break;
            }

        }
    }
}
 

void test(String testName, boolean expectNames, String... opts) throws Exception {
    System.err.println("Test " + testName
            + ": expectNames:" + expectNames
            + " javacOpts:" + Arrays.asList(opts));

    File outDir = new File(testName);
    outDir.mkdirs();
    compile(outDir, opts);

    Context ctx = new Context();
    JavacFileManager fm = new JavacFileManager(ctx, true, null);
    fm.setLocation(StandardLocation.CLASS_PATH, Arrays.asList(outDir));
    ClassReader cr = ClassReader.instance(ctx);
    cr.saveParameterNames = true;
    Names names = Names.instance(ctx);

    Set<String> classes = getTopLevelClasses(outDir);
    Deque<String> work = new LinkedList<String>(classes);
    String classname;
    while ((classname = work.poll()) != null) {
        System.err.println("Checking class " + classname);
        ClassSymbol sym = cr.enterClass(names.table.fromString(classname));
        sym.complete();

        if ((sym.flags() & Flags.INTERFACE) != 0 && !testInterfaces)
            continue;

        for (Scope.Entry e = sym.members_field.elems; e != null; e = e.sibling) {
            System.err.println("Checking member " + e.sym);
            switch (e.sym.kind) {
                case Kinds.TYP: {
                    String name = e.sym.flatName().toString();
                    if (!classes.contains(name)) {
                        classes.add(name);
                        work.add(name);
                    }
                    break;
                }
                case Kinds.MTH:
                    verify((MethodSymbol) e.sym, expectNames);
                    break;
            }

        }
    }
}
 

private JCTree replaceStructuralCall( JCTree.JCMethodInvocation theCall )
{
  JCExpression methodSelect = theCall.getMethodSelect();
  if( methodSelect instanceof JCTree.JCFieldAccess )
  {
    int pos = theCall.pos;

    Symtab symbols = _tp.getSymtab();
    Names names = Names.instance( _tp.getContext() );
    Symbol.ClassSymbol reflectMethodClassSym = IDynamicJdk.instance().getTypeElement( _tp.getContext(), _tp.getCompilationUnit(), RuntimeMethods.class.getName() );
    Symbol.MethodSymbol makeInterfaceProxyMethod = resolveMethod( theCall.pos(), names.fromString( "constructProxy" ), reflectMethodClassSym.type,
      List.from( new Type[]{symbols.objectType, symbols.classType} ) );

    JCTree.JCFieldAccess m = (JCTree.JCFieldAccess)methodSelect;
    TreeMaker make = _tp.getTreeMaker();
    JavacElements javacElems = _tp.getElementUtil();
    JCExpression thisArg = m.selected;

    ArrayList<JCExpression> newArgs = new ArrayList<>();
    newArgs.add( thisArg );
    JCTree.JCFieldAccess ifaceClassExpr = (JCTree.JCFieldAccess)memberAccess( make, javacElems, thisArg.type.tsym.getQualifiedName().toString() + ".class" );
    ifaceClassExpr.type = symbols.classType;
    ifaceClassExpr.sym = symbols.classType.tsym;
    ifaceClassExpr.pos = pos;
    assignTypes( ifaceClassExpr.selected, thisArg.type.tsym );
    ifaceClassExpr.selected.pos = pos;
    newArgs.add( ifaceClassExpr );

    JCTree.JCMethodInvocation makeProxyCall = make.Apply( List.nil(), memberAccess( make, javacElems, RuntimeMethods.class.getName() + ".constructProxy" ), List.from( newArgs ) );
    makeProxyCall.setPos( pos );
    makeProxyCall.type = thisArg.type;
    JCTree.JCFieldAccess newMethodSelect = (JCTree.JCFieldAccess)makeProxyCall.getMethodSelect();
    newMethodSelect.sym = makeInterfaceProxyMethod;
    newMethodSelect.type = makeInterfaceProxyMethod.type;
    newMethodSelect.pos = pos;
    assignTypes( newMethodSelect.selected, reflectMethodClassSym );
    newMethodSelect.selected.pos = pos;

    JCTypeCast cast = make.TypeCast( thisArg.type, makeProxyCall );
    cast.type = thisArg.type;
    cast.pos = pos;

    ((JCTree.JCFieldAccess)theCall.meth).selected = cast;

    theCall.pos = pos;

    return theCall;
  }
  return null;
}