/**
* Process a single compound annotation, returning its Attribute. Used from MemberEnter for
* attaching the attributes to the annotated symbol.
*/
Attribute.Compound enterAnnotation(JCAnnotation a, Type expected, Env<AttrContext> env) {
// The annotation might have had its type attributed (but not checked)
// by attr.attribAnnotationTypes during MemberEnter, in which case we do not
// need to do it again.
Type at =
(a.annotationType.type != null
? a.annotationType.type
: attr.attribType(a.annotationType, env));
a.type = chk.checkType(a.annotationType.pos(), at, expected);
if (a.type.isErroneous())
return new Attribute.Compound(a.type, List.<Pair<MethodSymbol, Attribute>>nil());
if ((a.type.tsym.flags() & Flags.ANNOTATION) == 0) {
log.error(a.annotationType.pos(), "not.annotation.type", a.type.toString());
return new Attribute.Compound(a.type, List.<Pair<MethodSymbol, Attribute>>nil());
}
List<JCExpression> args = a.args;
if (args.length() == 1 && args.head.getTag() != JCTree.ASSIGN) {
// special case: elided "value=" assumed
args.head = make.at(args.head.pos).Assign(make.Ident(names.value), args.head);
}
ListBuffer<Pair<MethodSymbol, Attribute>> buf = new ListBuffer<Pair<MethodSymbol, Attribute>>();
for (List<JCExpression> tl = args; tl.nonEmpty(); tl = tl.tail) {
JCExpression t = tl.head;
if (t.getTag() != JCTree.ASSIGN) {
log.error(t.pos(), "annotation.value.must.be.name.value");
continue;
}
JCAssign assign = (JCAssign) t;
if (assign.lhs.getTag() != JCTree.IDENT) {
log.error(t.pos(), "annotation.value.must.be.name.value");
continue;
}
JCIdent left = (JCIdent) assign.lhs;
Symbol method =
rs.resolveQualifiedMethod(left.pos(), env, a.type, left.name, List.<Type>nil(), null);
left.sym = method;
left.type = method.type;
if (method.owner != a.type.tsym)
log.error(left.pos(), "no.annotation.member", left.name, a.type);
Type result = method.type.getReturnType();
Attribute value = enterAttributeValue(result, assign.rhs, env);
if (!method.type.isErroneous())
buf.append(new Pair<MethodSymbol, Attribute>((MethodSymbol) method, value));
t.type = result;
}
return new Attribute.Compound(a.type, buf.toList());
}
/** Add a name usage to the simplifier's internal cache */
protected void addUsage(Symbol sym) {
Name n = sym.getSimpleName();
List<Symbol> conflicts = nameClashes.get(n);
if (conflicts == null) {
conflicts = List.nil();
}
if (!conflicts.contains(sym)) nameClashes.put(n, conflicts.append(sym));
}
/**
* Build a list of multiline diagnostics containing detailed info about type-variables, captured
* types, and intersection types
*
* @return where clause list
*/
protected List<JCDiagnostic> getWhereClauses() {
List<JCDiagnostic> clauses = List.nil();
for (WhereClauseKind kind : WhereClauseKind.values()) {
List<JCDiagnostic> lines = List.nil();
for (Map.Entry<Type, JCDiagnostic> entry : whereClauses.get(kind).entrySet()) {
lines = lines.prepend(entry.getValue());
}
if (!lines.isEmpty()) {
String key = kind.key();
if (lines.size() > 1) key += ".1";
JCDiagnostic d = diags.fragment(key, whereClauses.get(kind).keySet());
d = new JCDiagnostic.MultilineDiagnostic(d, lines.reverse());
clauses = clauses.prepend(d);
}
}
return clauses.reverse();
}
@Override
public Void visitTypeVar(TypeVar t, Void ignored) {
if (indexOf(t, WhereClauseKind.TYPEVAR) == -1) {
// access the bound type and skip error types
Type bound = t.bound;
while ((bound instanceof ErrorType)) bound = ((ErrorType) bound).getOriginalType();
// retrieve the bound list - if the type variable
// has not been attributed the bound is not set
List<Type> bounds =
(bound != null && bound.tsym != null) ? types.getBounds(t) : List.<Type>nil();
nameSimplifier.addUsage(t.tsym);
boolean boundErroneous =
bounds.head == null || bounds.head.tag == NONE || bounds.head.tag == ERROR;
if ((t.tsym.flags() & SYNTHETIC) == 0) {
// this is a true typevar
JCDiagnostic d =
diags.fragment(
"where.typevar" + (boundErroneous ? ".1" : ""),
t,
bounds,
Kinds.kindName(t.tsym.location()),
t.tsym.location());
whereClauses.get(WhereClauseKind.TYPEVAR).put(t, d);
symbolPreprocessor.visit(t.tsym.location(), null);
visit(bounds);
} else {
Assert.check(!boundErroneous);
// this is a fresh (synthetic) tvar
JCDiagnostic d = diags.fragment("where.fresh.typevar", t, bounds);
whereClauses.get(WhereClauseKind.TYPEVAR).put(t, d);
visit(bounds);
}
}
return null;
}
public String simplify(Symbol s) {
String name = s.getQualifiedName().toString();
if (!s.type.isCompound()) {
List<Symbol> conflicts = nameClashes.get(s.getSimpleName());
if (conflicts == null || (conflicts.size() == 1 && conflicts.contains(s))) {
List<Name> l = List.nil();
Symbol s2 = s;
while (s2.type.getEnclosingType().tag == CLASS && s2.owner.kind == Kinds.TYP) {
l = l.prepend(s2.getSimpleName());
s2 = s2.owner;
}
l = l.prepend(s2.getSimpleName());
StringBuilder buf = new StringBuilder();
String sep = "";
for (Name n2 : l) {
buf.append(sep);
buf.append(n2);
sep = ".";
}
name = buf.toString();
}
}
return name;
}
Attribute enterAttributeValue(Type expected, JCExpression tree, Env<AttrContext> env) {
// first, try completing the attribution value sym - if a completion
// error is thrown, we should recover gracefully, and display an
// ordinary resolution diagnostic.
try {
expected.tsym.complete();
} catch (CompletionFailure e) {
log.error(tree.pos(), "cant.resolve", Kinds.kindName(e.sym), e.sym);
return new Attribute.Error(expected);
}
if (expected.isPrimitive() || types.isSameType(expected, syms.stringType)) {
Type result = attr.attribExpr(tree, env, expected);
if (result.isErroneous()) return new Attribute.Error(expected);
if (result.constValue() == null) {
log.error(tree.pos(), "attribute.value.must.be.constant");
return new Attribute.Error(expected);
}
result = cfolder.coerce(result, expected);
return new Attribute.Constant(expected, result.constValue());
}
if (expected.tsym == syms.classType.tsym) {
Type result = attr.attribExpr(tree, env, expected);
if (result.isErroneous()) return new Attribute.Error(expected);
if (TreeInfo.name(tree) != names._class) {
log.error(tree.pos(), "annotation.value.must.be.class.literal");
return new Attribute.Error(expected);
}
return new Attribute.Class(types, (((JCFieldAccess) tree).selected).type);
}
if ((expected.tsym.flags() & Flags.ANNOTATION) != 0
|| types.isSameType(expected, syms.annotationType)) {
if (tree.getTag() != JCTree.ANNOTATION) {
log.error(tree.pos(), "annotation.value.must.be.annotation");
expected = syms.errorType;
}
return enterAnnotation((JCAnnotation) tree, expected, env);
}
if (expected.tag == TypeTags.ARRAY) { // should really be isArray()
if (tree.getTag() != JCTree.NEWARRAY) {
tree = make.at(tree.pos).NewArray(null, List.<JCExpression>nil(), List.of(tree));
}
JCNewArray na = (JCNewArray) tree;
if (na.elemtype != null) {
log.error(na.elemtype.pos(), "new.not.allowed.in.annotation");
return new Attribute.Error(expected);
}
ListBuffer<Attribute> buf = new ListBuffer<Attribute>();
for (List<JCExpression> l = na.elems; l.nonEmpty(); l = l.tail) {
buf.append(enterAttributeValue(types.elemtype(expected), l.head, env));
}
na.type = expected;
return new Attribute.Array(expected, buf.toArray(new Attribute[buf.length()]));
}
if (expected.tag == TypeTags.CLASS && (expected.tsym.flags() & Flags.ENUM) != 0) {
attr.attribExpr(tree, env, expected);
Symbol sym = TreeInfo.symbol(tree);
if (sym == null
|| TreeInfo.nonstaticSelect(tree)
|| sym.kind != Kinds.VAR
|| (sym.flags() & Flags.ENUM) == 0) {
log.error(tree.pos(), "enum.annotation.must.be.enum.constant");
return new Attribute.Error(expected);
}
VarSymbol enumerator = (VarSymbol) sym;
return new Attribute.Enum(expected, enumerator);
}
if (!expected.isErroneous()) log.error(tree.pos(), "annotation.value.not.allowable.type");
return new Attribute.Error(attr.attribExpr(tree, env, expected));
}