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

 /*

  * Copyright (c) 1999, 2013, 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.sjavac.comp;

 import javax.lang.model.element.Element;

 import java.util.Arrays;

 import java.util.Comparator;

 import java.util.HashMap;

 import java.util.HashSet;

 import java.util.Map;

 import java.util.Set;

 import com.sun.tools.javac.code.Symbol.ClassSymbol;

 import com.sun.tools.javac.util.Context;

 import com.sun.tools.javac.util.Log;

 import com.sun.tools.javac.util.Name;

 /** Utility class containing dependency information between packages

  *  and the pubapi for a package.

  *

  * <p><b>This is NOT part of any supported API.

  * If you write code that depends on this, you do so at your own

  * risk.  This code and its internal interfaces are subject to change

  * or deletion without notice.</b></p>

  */

 public class Dependencies {

     protected static final Context.Key<Dependencies> dependenciesKey =

         new Context.Key<Dependencies>();

     // The log to be used for error reporting.

     protected Log log;

     // Map from package name to packages that the package depends upon.

     protected Map<Name,Set<Name>> deps;

     // This is the set of all packages that are supplied

     // through the java files at the command line.

     protected Set<Name> explicitPackages;

     // Map from a package name to its public api.

     // Will the Name encode the module in the future?

     // If not, this will have to change to map from Module+Name to public api.

     protected Map<Name,StringBuffer> publicApiPerClass;

     public static Dependencies instance(Context context) {

         Dependencies instance = context.get(dependenciesKey);

         if (instance == null)

             instance = new Dependencies(context);

         return instance;

     }

     private Dependencies(Context context) {

         context.put(dependenciesKey, this);

         log = Log.instance(context);

     }

     public void reset()

     {

         deps = new HashMap<Name, Set<Name>>();

         explicitPackages = new HashSet<Name>();

         publicApiPerClass = new HashMap<Name,StringBuffer>();

     }

     /**

      * Fetch the set of dependencies that are relevant to the compile

      * that has just been performed. I.e. we are only interested in

      * dependencies for classes that were explicitly compiled.

      * @return

      */

     public Map<String,Set<String>> getDependencies() {

         Map<String,Set<String>> new_deps = new HashMap<String,Set<String>>();

         if (explicitPackages == null) return new_deps;

         for (Name pkg : explicitPackages) {

             Set<Name> set = deps.get(pkg);

             if (set != null) {

                 Set<String> new_set = new_deps.get(pkg.toString());

                 if (new_set == null) {

                     new_set = new HashSet<String>();

                     // Modules beware....

                     new_deps.put(":"+pkg.toString(), new_set);

                 }

                 for (Name d : set) {

                     new_set.add(":"+d.toString());

                 }

             }

         }

         return new_deps;

     }

     class CompareNames implements Comparator<Name> {

          public int compare(Name a, Name b) {

              return a.toString().compareTo(b.toString());

          }

     }

     /**

      * Convert the map from class names to their pubapi to a map

      * from package names to their pubapi (which is the sorted concatenation

      * of all the class pubapis)

      */

     public Map<String,String> getPubapis() {

         Map<String,String> publicApiPerPackage = new HashMap<String,String>();

         if (publicApiPerClass == null) return publicApiPerPackage;

         Name[] keys = publicApiPerClass.keySet().toArray(new Name[0]);

         Arrays.sort(keys, new CompareNames());

         StringBuffer newPublicApi = new StringBuffer();

         int i=0;

         String prevPkg = "";

         for (Name k : keys) {

             String cn = k.toString();

             String pn = "";

             int dp = cn.lastIndexOf('.');

             if (dp != -1) {

                 pn = cn.substring(0,dp);

             }

             if (!pn.equals(prevPkg)) {

                 if (!prevPkg.equals("")) {

                     // Add default module name ":"

                     publicApiPerPackage.put(":"+prevPkg, newPublicApi.toString());

                 }

                 newPublicApi = new StringBuffer();

                 prevPkg = pn;

             }

             newPublicApi.append(publicApiPerClass.get(k));

             i++;

         }

         if (!prevPkg.equals(""))

             publicApiPerPackage.put(":"+prevPkg, newPublicApi.toString());

         return publicApiPerPackage;

     }

     /**

      * Visit the api of a class and construct a pubapi string and

      * store it into the pubapi_perclass map.

      */

     public void visitPubapi(Element e) {

         Name n = ((ClassSymbol)e).fullname;

         Name p = ((ClassSymbol)e).packge().fullname;

         StringBuffer sb = publicApiPerClass.get(n);

         assert(sb == null);

         sb = new StringBuffer();

         PubapiVisitor v = new PubapiVisitor(sb);

         v.visit(e);

         if (sb.length()>0) {

             publicApiPerClass.put(n, sb);

         }

         explicitPackages.add(p);

      }

     /**

      * Collect a dependency. curr_pkg is marked as depending on dep_pkg.

      */

     public void collect(Name currPkg, Name depPkg) {

         if (!currPkg.equals(depPkg)) {

             Set<Name> theset = deps.get(currPkg);

             if (theset==null) {

                 theset = new HashSet<Name>();

                 deps.put(currPkg, theset);

             }

             theset.add(depPkg);

         }

     }

 }