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 }