1 /*
   2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package com.sun.tools.sjavac.comp.dependencies;
  26 
  27 import java.util.Collections;
  28 import java.util.HashSet;
  29 import java.util.Objects;
  30 import java.util.Set;
  31 import java.util.stream.Collectors;
  32 
  33 import com.sun.tools.javac.code.Symbol.ClassSymbol;
  34 import com.sun.tools.javac.code.Symbol.PackageSymbol;
  35 import com.sun.tools.javac.code.Symbol.TypeSymbol;
  36 import com.sun.tools.javac.code.Kinds;
  37 import com.sun.tools.javac.code.Type;
  38 
  39 import static com.sun.tools.javac.code.Kinds.Kind.*;
  40 
  41 public class TypeAndSupertypesDependency implements Dependency {
  42 
  43     protected TypeSymbol type;
  44 
  45     public TypeAndSupertypesDependency(TypeSymbol type) {
  46         this.type = Objects.requireNonNull(type);
  47     }
  48 
  49     private Set<TypeSymbol> allSupertypes(TypeSymbol t) {
  50         if (t == null)
  51             return Collections.emptySet();
  52         Set<TypeSymbol> result = new HashSet<>();
  53         result.add(t);
  54         if (t instanceof ClassSymbol) {
  55             ClassSymbol cs = (ClassSymbol) t;
  56             result.addAll(allSupertypes(cs.getSuperclass().tsym));
  57             for (Type it : cs.getInterfaces())
  58                 result.addAll(allSupertypes(it.tsym));
  59         }
  60         return result;
  61     }
  62 
  63     @Override
  64     public Set<PackageSymbol> getPackages() {
  65         if (type.kind == ERR)
  66             return Collections.emptySet();
  67         if (type instanceof ClassSymbol) {
  68             return allSupertypes(type).stream()
  69                                       .map(TypeSymbol::packge)
  70                                       .collect(Collectors.toSet());
  71         }
  72         throw new AssertionError("Could not get package name for " + type);
  73     }
  74 }
  75