langtools/src/jdk.compiler/share/classes/com/sun/tools/sjavac/comp/Dependencies.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/sjavac/comp/Dependencies.java Sun Aug 17 15:52:32 2014 +0100
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 1999, 2014, 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<>();
+
+ // 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);
+ deps = new HashMap<>();
+ explicitPackages = new HashSet<>();
+ publicApiPerClass = new HashMap<>();
+ }
+
+ /**
+ * 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<>();
+ 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<>();
+ // Modules beware....
+ new_deps.put(":"+pkg.toString(), new_set);
+ }
+ for (Name d : set) {
+ new_set.add(":"+d.toString());
+ }
+ }
+ }
+ return new_deps;
+ }
+
+ static 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<>();
+ 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<>();
+ deps.put(currPkg, theset);
+ }
+ theset.add(depPkg);
+ }
+ }
+}