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.HashMap;
  28 import java.util.Map;
  29 import java.util.Set;
  30 import java.util.stream.Collectors;
  31 
  32 import com.sun.source.util.TaskEvent;
  33 import com.sun.source.util.TaskListener;
  34 import com.sun.tools.javac.code.Symbol.PackageSymbol;
  35 import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
  36 import com.sun.tools.javac.util.DefinedBy;
  37 import com.sun.tools.javac.util.DefinedBy.Api;
  38 import com.sun.tools.sjavac.Util;
  39 
  40 public class DependencyCollector implements TaskListener {
  41 
  42     Map<PackageSymbol, Set<PackageSymbol>> collectedDependencies = new HashMap<>();
  43 
  44     @Override
  45     @DefinedBy(Api.COMPILER_TREE)
  46     public void started(TaskEvent e) {
  47     }
  48 
  49     @Override
  50     @DefinedBy(Api.COMPILER_TREE)
  51     public void finished(TaskEvent e) {
  52         if (e.getKind() == TaskEvent.Kind.ANALYZE) {
  53             JCCompilationUnit cu = (JCCompilationUnit) e.getCompilationUnit();
  54             PackageSymbol thisPkg = cu.packge;
  55             if (thisPkg == null) {
  56                 // Compilation unit in default package. See JDK-8048144.
  57                 return;
  58             }
  59             DependencyScanner ds = new DependencyScanner();
  60             cu.accept(ds);
  61             Set<PackageSymbol> pkgDeps = ds.getResult()
  62                                            .stream()
  63                                            .flatMap(dep -> dep.getPackages().stream())
  64                                            .collect(Collectors.toSet());
  65             collectedDependencies.merge(thisPkg, pkgDeps, Util::union);
  66         }
  67     }
  68 
  69     public Set<PackageSymbol> getSourcePackages() {
  70         return collectedDependencies.keySet();
  71     }
  72 
  73     public Set<PackageSymbol> getDependenciesForPkg(PackageSymbol ps) {
  74         return collectedDependencies.get(ps);
  75     }
  76 }