Java Code Examples for com.sun.tools.javac.code.Type

private List<Pair<Type, Type>> getParameterizedSupers(Type t, Type s) {
    Type lubResult = types.lub(t, s);
    if (lubResult == syms.errType || lubResult == syms.botType) {
        return List.nil();
    }
    List<Type> supertypesToCheck = lubResult.isIntersection() ?
            ((IntersectionClassType)lubResult).getComponents() :
            List.of(lubResult);
    ListBuffer<Pair<Type, Type>> commonSupertypes = new ListBuffer<>();
    for (Type sup : supertypesToCheck) {
        if (sup.isParameterized()) {
            Type asSuperOfT = asSuper(t, sup);
            Type asSuperOfS = asSuper(s, sup);
            commonSupertypes.add(new Pair<>(asSuperOfT, asSuperOfS));
        }
    }
    return commonSupertypes.toList();
}
 

@Override
public Boolean visitType(Type t, Type s) {
    if (t == s)
        return true;

    if (s.isPartial())
        return visit(s, t);

    switch (t.getTag()) {
    case BYTE: case CHAR: case SHORT: case INT: case LONG: case FLOAT:
    case DOUBLE: case BOOLEAN: case VOID: case BOT: case NONE:
        return t.hasTag(s.getTag());
    default:
        throw new AssertionError("fuzzyMatcher " + t.getTag());
    }
}
 

/**
 * Return the string representation of a type use.  Bounds of type
 * variables are not included; bounds of wildcard types are.
 * Class names are qualified if "full" is true.
 */
static String getTypeString(DocEnv env, Type t, boolean full) {
    // TODO: should annotations be included here?
    if (t.isAnnotated()) {
        t = t.unannotatedType();
    }
    switch (t.getTag()) {
    case ARRAY:
        StringBuilder s = new StringBuilder();
        while (t.hasTag(ARRAY)) {
            s.append("[]");
            t = env.types.elemtype(t);
        }
        s.insert(0, getTypeString(env, t, full));
        return s.toString();
    case CLASS:
        return ParameterizedTypeImpl.
                    parameterizedTypeToString(env, (ClassType)t, full);
    case WILDCARD:
        Type.WildcardType a = (Type.WildcardType)t;
        return WildcardTypeImpl.wildcardTypeToString(env, a, full);
    default:
        return t.tsym.getQualifiedName().toString();
    }
}
 

public final Type getType(String type) {
    JavaSource source = new JavaSource(type);
    MyAttr.theType = null;
    MyAttr.typeParameters = List.nil();
    tool.clear();
    List<JavaFileObject> inputs = of(source);
    try {
        tool.compile(inputs);
    } catch (Throwable ex) {
        throw new Abort(ex);
    }
    if (typeVariables != null) {
        return types.subst(MyAttr.theType, MyAttr.typeParameters, typeVariables);
    }
    return MyAttr.theType;
}
 

protected void printObject(String label, Object item, Details details) {
    if (item == null) {
        printNull(label);
    } else if (item instanceof Attribute) {
        printAttribute(label, (Attribute) item);
    } else if (item instanceof Symbol) {
        printSymbol(label, (Symbol) item, details);
    } else if (item instanceof Type) {
        printType(label, (Type) item, details);
    } else if (item instanceof JCTree) {
        printTree(label, (JCTree) item);
    } else if (item instanceof List) {
        printList(label, (List) item);
    } else if (item instanceof Name) {
        printName(label, (Name) item);
    } else {
        printString(label, String.valueOf(item));
    }
}
 

private Attribute getAnnotationArrayValue(Type expectedElementType, JCExpression tree, Env<AttrContext> env) {
    // Special case, implicit array
    if (!tree.hasTag(NEWARRAY)) {
        tree = make.at(tree.pos).
                NewArray(null, List.nil(), List.of(tree));
    }

    JCNewArray na = (JCNewArray)tree;
    if (na.elemtype != null) {
        log.error(na.elemtype.pos(), Errors.NewNotAllowedInAnnotation);
    }
    ListBuffer<Attribute> buf = new ListBuffer<>();
    for (List<JCExpression> l = na.elems; l.nonEmpty(); l=l.tail) {
        buf.append(attributeAnnotationValue(types.elemtype(expectedElementType),
                l.head,
                env));
    }
    na.type = expectedElementType;
    return new Attribute.
            Array(expectedElementType, buf.toArray(new Attribute[buf.length()]));
}
 

/** Is exc an exception type that need not be declared?
 */
boolean isUnchecked(Type exc) {
    return
        (exc.hasTag(TYPEVAR)) ? isUnchecked(types.supertype(exc)) :
        (exc.hasTag(CLASS)) ? isUnchecked((ClassSymbol)exc.tsym) :
        exc.hasTag(BOT);
}
 

List<Type> solveBasic(List<Type> varsToSolve, EnumSet<InferenceStep> steps) {
    ListBuffer<Type> solvedVars = new ListBuffer<>();
    for (Type t : varsToSolve.intersect(restvars())) {
        UndetVar uv = (UndetVar)asUndetVar(t);
        for (InferenceStep step : steps) {
            if (step.accepts(uv, this)) {
                uv.setInst(step.solve(uv, this));
                solvedVars.add(uv.qtype);
                break;
            }
        }
    }
    return solvedVars.toList();
}
 

/** does this functional expression require serialization support? */
boolean isSerializable() {
    for (Type target : tree.targets) {
        if (types.asSuper(target, syms.serializableType.tsym) != null) {
            return true;
        }
    }
    return false;
}
 

/**
 * Like the above version, but use and return the array given.
 */
public static com.sun.javadoc.Type[] getTypes(DocEnv env, List<Type> ts,
                                              com.sun.javadoc.Type res[]) {
    int i = 0;
    for (Type t : ts) {
        res[i++] = getType(env, t);
    }
    return res;
}
 

/**
 * Erase all structural interface type literals to Object
 */
@Override
public void visitIdent( JCTree.JCIdent tree )
{
  super.visitIdent( tree );

  if( _tp.isGenerate() && !shouldProcessForGeneration() )
  {
    // Don't process tree during GENERATE, unless the tree was generated e.g., a bridge method
    return;
  }

  if( TypeUtil.isStructuralInterface( _tp, tree.sym ) && !isReceiver( tree ) )
  {
    Symbol.ClassSymbol objectSym = getObjectClass();
    Tree parent = _tp.getParent( tree );
    JCTree.JCIdent objIdent = _tp.getTreeMaker().Ident( objectSym );
    if( parent instanceof JCTree.JCVariableDecl )
    {
      ((JCTree.JCVariableDecl)parent).type = objectSym.type;

      long parameterModifier = 8589934592L; // Flag.Flag.PARAMETER.value
      if( (((JCTree.JCVariableDecl)parent).mods.flags & parameterModifier) != 0 )
      {
        objIdent.type = objectSym.type;
        ((JCTree.JCVariableDecl)parent).sym.type = objectSym.type;
        ((JCTree.JCVariableDecl)parent).vartype = objIdent;
      }
    }
    else if( parent instanceof JCTree.JCWildcard )
    {
      JCTree.JCWildcard wildcard = (JCTree.JCWildcard)parent;
      wildcard.type = new Type.WildcardType( objectSym.type, wildcard.kind.kind, wildcard.type.tsym );
    }
    tree = objIdent;
    tree.type = objectSym.type;
  }
  result = tree;
}
 

void test() {
    for (int i = 0; i < rows.length ; i++) {
        for (int j = 0; j < columns.length ; j++) {
            Type decl = columns[j];
            Type inst = rows[i].inst(decl);
            if (isValidInstantiation[i][j] != Result.IGNORE) {
                executedCount++;
                assertValidGenericType(inst, isValidInstantiation[i][j].value);
            } else {
                ignoredCount++;
            }
        }
    }
}
 

/** The name of a this$n field
 *  @param type   The class referenced by the this$n field
 */
Name outerThisName(Type type, Symbol owner) {
    Type t = type.getEnclosingType();
    int nestingLevel = 0;
    while (t.hasTag(CLASS)) {
        t = t.getEnclosingType();
        nestingLevel++;
    }
    Name result = names.fromString("this" + target.syntheticNameChar() + nestingLevel);
    while (owner.kind == TYP && ((ClassSymbol)owner).members().findFirst(result) != null)
        result = names.fromString(result.toString() + target.syntheticNameChar());
    return result;
}
 

@Override
public String visitType(Type t, Locale locale) {
    String s = super.visitType(t, locale);
    if (t == syms.botType)
        s = localize(locale, "compiler.misc.type.null");
    return s;
}
 

@Override
@Nullable
public Unifier visitForAll(ForAll target, @Nullable Unifier unifier) {
  Types types = unifier.types();
  try {
    Type myType = inline(new Inliner(unifier.getContext(), Bindings.create()));
    if (types.overrideEquivalent(types.erasure(myType), types.erasure(target))) {
      return unifier;
    }
  } catch (CouldNotResolveImportException e) {
    // fall through
  }
  return null;
}
 

public void visitSwitch(JCSwitch tree) {
    Type selsuper = types.supertype(tree.selector.type);
    boolean enumSwitch = selsuper != null &&
        selsuper.tsym == syms.enumSym;
    Type target = enumSwitch ? erasure(tree.selector.type) : syms.intType;
    tree.selector = translate(tree.selector, target);
    tree.cases = translateCases(tree.cases);
    result = tree;
}
 

private JCExpression makeReceiver(VarSymbol rcvr) {
    if (rcvr == null) return null;
    JCExpression rcvrExpr = make.Ident(rcvr);
    Type rcvrType = tree.ownerAccessible ? tree.sym.enclClass().type : tree.expr.type;
    if (rcvrType == syms.arrayClass.type) {
        // Map the receiver type to the actually type, not just "array"
        rcvrType = tree.getQualifierExpression().type;
    }
    if (!rcvr.type.tsym.isSubClass(rcvrType.tsym, types)) {
        rcvrExpr = make.TypeCast(make.Type(rcvrType), rcvrExpr).setType(rcvrType);
    }
    return rcvrExpr;
}
 

private JCIdent makeThis(Type type, Symbol owner) {
    VarSymbol _this = new VarSymbol(PARAMETER | FINAL | SYNTHETIC,
            names._this,
            type,
            owner);
    return make.Ident(_this);
}
 

String getExpectedName(VarSymbol v, int i) {
    // special cases:
    // synthetic method
    if (((v.owner.owner.flags() & Flags.ENUM) != 0)
            && v.owner.name.toString().equals("valueOf"))
        return "name";
    // interfaces don't have saved names
    // -- no Code attribute for the LocalVariableTable attribute
    if ((v.owner.owner.flags() & Flags.INTERFACE) != 0)
        return "arg" + (i - 1);
    // abstract methods don't have saved names
    // -- no Code attribute for the LocalVariableTable attribute
    if ((v.owner.flags() & Flags.ABSTRACT) != 0)
        return "arg" + (i - 1);
    // bridge methods use argN. No LVT for them anymore
    if ((v.owner.flags() & Flags.BRIDGE) != 0)
        return "arg" + (i - 1);

    // The rest of this method assumes the local conventions in the test program
    Type t = v.type;
    String s;
    if (t.hasTag(TypeTag.CLASS))
        s = ((ClassType) t).tsym.name.toString();
    else
        s = t.toString();
    return String.valueOf(Character.toLowerCase(s.charAt(0))) + i;
}
 

/** assert that 's' is/is not convertible (method invocation conversion) to 't' */
public void assertConvertible(Type s, Type t, boolean expected) {
    if (types.isConvertible(s, t) != expected) {
        String msg = expected ?
            " is not convertible to " :
            " is convertible to ";
        error(s + msg + t);
    }
}
 

/**
 * Set the results of method attribution.
 */
void setResult(JCExpression tree, Type type) {
    result = type;
    if (env.info.isSpeculative) {
        //if we are in a speculative branch we can save the type in the tree itself
        //as there's no risk of polluting the original tree.
        tree.type = result;
    }
}
 

/** compute the boxed type associated with 't' */
public Type box(Type t) {
    if (!t.isPrimitive()) {
        throw new AssertionError("Cannot box non-primitive type: " + t);
    }
    return types.boxedClass(t).type;
}
 

public List<Extension> getExtensions(final JavacNode typeNode, final List<Object> extensionProviders) {
	List<Extension> extensions = new ArrayList<Extension>();
	for (Object extensionProvider : extensionProviders) {
		if (!(extensionProvider instanceof JCFieldAccess)) continue;
		JCFieldAccess provider = (JCFieldAccess) extensionProvider;
		if (!("class".equals(provider.name.toString()))) continue;
		Type providerType = CLASS.resolveMember(typeNode, provider.selected);
		if (providerType == null) continue;
		if ((providerType.tsym.flags() & (INTERFACE | ANNOTATION)) != 0) continue;
		
		extensions.add(getExtension(typeNode, (ClassType) providerType));
	}
	return extensions;
}
 

@Override
public String visitType(Type t, Locale locale) {
    String s = super.visitType(t, locale);
    if (t == syms.botType)
        s = localize(locale, "compiler.misc.type.null");
    return s;
}
 

private JCIdent makeThis(Type type, Symbol owner) {
    VarSymbol _this = new VarSymbol(PARAMETER | FINAL | SYNTHETIC,
            names._this,
            type,
            owner);
    return make.Ident(_this);
}
 

public boolean alreadyDefinedIn(CharSequence name, ExecutableType method, TypeElement enclClass) {
    Type.MethodType meth = ((Type)method).asMethodType();
    ClassSymbol clazz = (ClassSymbol)enclClass;
    Scope scope = clazz.members();
    Name n = names.fromString(name.toString());
    for (Symbol sym : scope.getSymbolsByName(n, Scope.LookupKind.NON_RECURSIVE)) {
        if(sym.type instanceof ExecutableType &&
                types.isSubsignature(meth, (ExecutableType)sym.type))
            return true;
    }
    return false;
}
 

List<Type> instTypes() {
    ListBuffer<Type> buf = new ListBuffer<>();
    for (Type t : undetvars) {
        UndetVar uv = (UndetVar)t;
        buf.append(uv.getInst() != null ? uv.getInst() : uv.qtype);
    }
    return buf.toList();
}
 

/** Convert (implicit) signature to list of types
 *  until `terminator' is encountered.
 */
List<Type> sigToTypes(char terminator) {
    List<Type> head = List.of(null);
    List<Type> tail = head;
    while (signature[sigp] != terminator)
        tail = tail.setTail(List.of(sigToType()));
    sigp++;
    return head.tail;
}
 

/**
 * Return the superclass of this class.  Return null if this is an
 * interface.  A superclass is represented by either a
 * <code>ClassDoc</code> or a <code>ParameterizedType</code>.
 */
public com.sun.javadoc.Type superclassType() {
    if (isInterface() || isAnnotationType() ||
            (tsym == env.syms.objectType.tsym))
        return null;
    Type sup = env.types.supertype(type);
    return TypeMaker.getType(env,
                             (sup.hasTag(TypeTag.NONE)) ? env.syms.objectType : sup);
}
 

/** Get the type associated with given return expression. */
Type getReturnType(JCReturn ret) {
    if (ret.expr == null) {
        return syms.voidType;
    } else {
        return ret.expr.type;
    }
}