/**
   * Find a type object in the context of the class.
   *
   * @param name The name to search for.
   */
  public Named find(Matcher<Named> matcher, Context context) throws SemanticException {
    Name name = matcher.name();

    if (Report.should_report(TOPICS, 2)) Report.report(2, "Looking for " + name + " in " + this);

    if (!(type instanceof ClassType)) {
      throw new NoClassException(name.toString(), type);
    }

    ClassType type = (ClassType) this.type;

    Named m = null;

    QName fullName = null;
    QName rawName = null;

    if (type.isGloballyAccessible()) {
      fullName = QName.make(type.fullName(), name);
      QName q = ts.getTransformedClassName(type.def());
      rawName = QName.make(q.qualifier(), Name.make(q.name() + "$" + name));
    }

    if (fullName != null) {
      // First check the system resolver.
      m = ts.systemResolver().check(fullName);

      // Try the raw class file name.
      if (m == null) {
        m = ts.systemResolver().check(rawName);
      }

      if (m == null) {
        // Go to disk, but only if there is no job for the type.
        // If there is a job, all members should be in the resolver
        // already.
        boolean useLoadedResolver = true;

        if (type instanceof ParsedTypeObject) {
          ParsedTypeObject pto = (ParsedTypeObject) type;
          if (pto.job() != null) {
            useLoadedResolver = false;
          }
        }

        if (useLoadedResolver) {
          try {
            m = ts.systemResolver().find(rawName);
          } catch (SemanticException e) {
            // Not found; will fall through to error handling code
          }
        }
      }

      // If we found something, verify that it matches.
      if (m != null) {
        try {
          m = matcher.instantiate(m);
        } catch (SemanticException e) {
          // Doesn't match; try again.
          m = null;
        }
      }
    }

    // Check if the member was explicitly declared.
    if (m == null) {
      m = type.memberTypeMatching(matcher);
    }

    // If we found something, make sure it's accessible.
    if (m instanceof ClassType) {
      ClassType mt = (ClassType) m;

      if (!mt.isMember()) {
        throw new SemanticException(
            "Class " + mt + " is not a member class, " + " but was found in " + type + ".");
      }

      if (!mt.outer().equals((Object) type)) {
        throw new SemanticException(
            "Class " + mt + " is not a member class " + " of " + type + ".");
      }

      return mt;
    }

    if (m instanceof MemberInstance) {
      MemberInstance<?> mi = (MemberInstance<?>) m;

      if (!mi.container().equals((Object) type)) {
        throw new SemanticException("Type " + mi + " is not a member " + " of " + type + ".");
      }
    }

    if (m != null) {
      if (!canAccess(m, context.currentClassDef(), context)) {
        throw new SemanticException("Cannot access member type \"" + m + "\".");
      }
      return m;
    }

    // If we struck out, try the super types.

    // Collect all members of the super types.
    // Use a Set to eliminate duplicates.
    Set<Named> acceptable = new HashSet<Named>();

    if (type.superClass() != null) {
      Type sup = type.superClass();
      if (sup instanceof ClassType) {
        Resolver r = ts.classContextResolver((ClassType) sup, context);
        try {
          Named n = r.find(matcher);
          acceptable.add(n);
        } catch (SemanticException e) {
        }
      }
    }

    for (Iterator<Type> i = type.interfaces().iterator(); i.hasNext(); ) {
      Type sup = (Type) i.next();
      if (sup instanceof ClassType) {
        Resolver r = ts.classContextResolver((ClassType) sup, context);
        try {
          Named n = r.find(matcher);
          acceptable.add(n);
        } catch (SemanticException e) {
        }
      }
    }

    if (acceptable.size() == 0) {
      throw new NoClassException(name.toString(), type);
    } else if (acceptable.size() > 1) {
      Set<Type> containers = new HashSet<Type>(acceptable.size());
      for (Named n : acceptable) {
        if (n instanceof MemberInstance) {
          MemberInstance<?> mi = (MemberInstance<?>) n;
          containers.add(mi.container());
        }
      }

      if (containers.size() == 2) {
        Iterator<Type> i = containers.iterator();
        Type t1 = (Type) i.next();
        Type t2 = (Type) i.next();
        throw new SemanticException(
            "Member \""
                + name
                + "\" of "
                + type
                + " is ambiguous; it is defined in both "
                + t1
                + " and "
                + t2
                + ".");
      } else if (containers.size() == 0) {
        throw new SemanticException("Member \"" + name + "\" of " + type + " is ambiguous.");
      } else {
        throw new SemanticException(
            "Member \""
                + name
                + "\" of "
                + type
                + " is ambiguous; it is defined in "
                + CollectionUtil.listToString(new ArrayList<Type>(containers))
                + ".");
      }
    }

    assert acceptable.size() == 1;

    Named t = acceptable.iterator().next();

    if (Report.should_report(TOPICS, 2)) Report.report(2, "Found member type " + t);

    return t;
  }
Exemplo n.º 2
0
 public Context enterScope(Context c) {
   return c.pushBlock();
 }