Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 package com.sun.tools.jdeps;

 import com.sun.tools.classfile.Dependency;

 import com.sun.tools.classfile.Dependency.Location;

 import java.io.File;

 import java.util.Comparator;

 import java.util.HashMap;

 import java.util.HashSet;

 import java.util.Map;

 import java.util.Set;

 import java.util.SortedMap;

 import java.util.SortedSet;

 import java.util.TreeMap;

 import java.util.TreeSet;

 /**

  * Represents the source of the class files.

  */

 public class Archive {

     private static Map<String,Archive> archiveForClass = new HashMap<String,Archive>();

     public static Archive find(Location loc) {

         return archiveForClass.get(loc.getName());

     }

     private final File file;

     private final String filename;

     private final DependencyRecorder recorder;

     private final ClassFileReader reader;

     public Archive(String name) {

         this.file = null;

         this.filename = name;

         this.recorder = new DependencyRecorder();

         this.reader = null;

     }

     public Archive(File f, ClassFileReader reader) {

         this.file = f;

         this.filename = f.getName();

         this.recorder = new DependencyRecorder();

         this.reader = reader;

     }

     public ClassFileReader reader() {

         return reader;

     }

     public String getFileName() {

         return filename;

     }

     public void addClass(String classFileName) {

         Archive a = archiveForClass.get(classFileName);

         assert(a == null || a == this); // ## issue warning?

         if (!archiveForClass.containsKey(classFileName)) {

             archiveForClass.put(classFileName, this);

         }

     }

     public void addDependency(Dependency d) {

         recorder.addDependency(d);

     }

     /**

      * Returns a sorted map of a class to its dependencies.

      */

     public SortedMap<Location, SortedSet<Location>> getDependencies() {

         DependencyRecorder.Filter filter = new DependencyRecorder.Filter() {

             public boolean accept(Location origin, Location target) {

                  return (archiveForClass.get(origin.getName()) !=

                             archiveForClass.get(target.getName()));

         }};

         SortedMap<Location, SortedSet<Location>> result =

             new TreeMap<Location, SortedSet<Location>>(locationComparator);

         for (Map.Entry<Location, Set<Location>> e : recorder.dependencies().entrySet()) {

             Location o = e.getKey();

             for (Location t : e.getValue()) {

                 if (filter.accept(o, t)) {

                     SortedSet<Location> odeps = result.get(o);

                     if (odeps == null) {

                         odeps = new TreeSet<Location>(locationComparator);

                         result.put(o, odeps);

                     }

                     odeps.add(t);

                 }

             }

         }

         return result;

     }

     /**

      * Returns the set of archives this archive requires.

      */

     public Set<Archive> getRequiredArchives() {

         SortedSet<Archive> deps = new TreeSet<Archive>(new Comparator<Archive>() {

             public int compare(Archive a1, Archive a2) {

                 return a1.toString().compareTo(a2.toString());

             }

         });

         for (Map.Entry<Location, Set<Location>> e : recorder.dependencies().entrySet()) {

             Location o = e.getKey();

             Archive origin = Archive.find(o);

             for (Location t : e.getValue()) {

                 Archive target = Archive.find(t);

                 assert(origin != null && target != null);

                 if (origin != target) {

                     if (!deps.contains(target)) {

                         deps.add(target);

                     }

                 }

             }

         }

         return deps;

     }

     public String toString() {

         return file != null ? file.getPath() : filename;

     }

     private static class DependencyRecorder {

         static interface Filter {

             boolean accept(Location origin, Location target);

         }

         public void addDependency(Dependency d) {

             Set<Location> odeps = map.get(d.getOrigin());

             if (odeps == null) {

                 odeps = new HashSet<Location>();

                 map.put(d.getOrigin(), odeps);

             }

             odeps.add(d.getTarget());

         }

         public Map<Location, Set<Location>> dependencies() {

             return map;

         }

         private final Map<Location, Set<Location>> map =

             new HashMap<Location, Set<Location>>();

     }

     private static Comparator<Location> locationComparator =

         new Comparator<Location>() {

             public int compare(Location o1, Location o2) {

                 return o1.toString().compareTo(o2.toString());

             }

         };

 }