jdk8-mips64-public/langtools: make/tools/genstubs/GenStubs.java@05824e9d8171 (annotated)

make/tools/genstubs/GenStubs.java@05824e9d8171 (annotated)

make/tools/genstubs/GenStubs.java

Mon, 03 Nov 2014 12:35:10 -0800

author: asaha
date: Mon, 03 Nov 2014 12:35:10 -0800
changeset 2661: 05824e9d8171
parent 1786: d685b12b62a4
child 2525: 2eb010b6cb22
permissions: -rw-r--r--

Added tag jdk8u31-b07 for changeset 03b8ef4cf0c0

 /*
  * Copyright (c) 2009, 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 genstubs;
 import java.io.*;
 import java.util.*;
 import javax.tools.JavaFileObject;
 import javax.tools.StandardJavaFileManager;
 import javax.tools.StandardLocation;
 import com.sun.source.tree.CompilationUnitTree;
 import com.sun.source.util.JavacTask;
 import com.sun.tools.javac.api.JavacTool;
 import com.sun.tools.javac.code.Flags;
 import com.sun.tools.javac.code.TypeTag;
 import com.sun.tools.javac.tree.JCTree;
 import com.sun.tools.javac.tree.JCTree.JCClassDecl;
 import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
 import com.sun.tools.javac.tree.JCTree.JCFieldAccess;
 import com.sun.tools.javac.tree.JCTree.JCIdent;
 import com.sun.tools.javac.tree.JCTree.JCImport;
 import com.sun.tools.javac.tree.JCTree.JCLiteral;
 import com.sun.tools.javac.tree.JCTree.JCMethodDecl;
 import com.sun.tools.javac.tree.JCTree.JCModifiers;
 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
 import com.sun.tools.javac.tree.Pretty;
 import com.sun.tools.javac.tree.TreeMaker;
 import com.sun.tools.javac.tree.TreeScanner;
 import com.sun.tools.javac.tree.TreeTranslator;
 import com.sun.tools.javac.util.Context;
 import com.sun.tools.javac.util.ListBuffer;
 import com.sun.tools.javac.util.Name;
 import javax.tools.JavaFileManager;
 /**
  * Generate stub source files by removing implementation details from input files.
  *
  * This is a special purpose stub generator, specific to the needs of generating
  * stub files for JDK 7 API that are needed to compile langtools files that depend
  * on that API. The stub generator works by removing as much of the API source code
  * as possible without affecting the public signature, in order to reduce the
  * transitive closure of the API being referenced. The resulting stubs can be
  * put on the langtools sourcepath with -implicit:none to compile the langtools
  * files that depend on the JDK 7 API.
  *
  * Usage:
  *  genstubs -s <outdir> -sourcepath <path> <classnames>
  *
  * The specified class names are looked up on the sourcepath, and corresponding
  * stubs are written to the source output directory.
  *
  * Classes are parsed into javac ASTs, then processed with a javac TreeTranslator
  * to remove implementation details, and written out in the source output directory.
  * Documentation comments and annotations are removed. Method bodies are removed
  * and methods are marked native. Private and package-private field definitions
  * have their initializers replace with 0, 0.0, false, null as appropriate.
  */
 public class GenStubs {
     static class Fault extends Exception {
         private static final long serialVersionUID = 0;
         Fault(String message) {
             super(message);
         }
         Fault(String message, Throwable cause) {
             super(message);
             initCause(cause);
         }
     }
     public static void main(String[] args) {
         boolean ok = new GenStubs().run(args);
         if (!ok)
             System.exit(1);
     }
     public boolean run(String... args) {
         File outdir = null;
         String sourcepath = null;
         List<String> classes = new ArrayList<String>();
         for (ListIterator<String> iter = Arrays.asList(args).listIterator(); iter.hasNext(); ) {
             String arg = iter.next();
             if (arg.equals("-s") && iter.hasNext())
                 outdir = new File(iter.next());
             else if (arg.equals("-sourcepath") && iter.hasNext())
                 sourcepath = iter.next();
             else if (arg.startsWith("-"))
                 throw new IllegalArgumentException(arg);
             else {
                 classes.add(arg);
                 while (iter.hasNext())
                     classes.add(iter.next());
             }
         }
         return run(sourcepath, outdir, classes);
     }
     public boolean run(String sourcepath, File outdir, List<String> classes) {
         //System.err.println("run: sourcepath:" + sourcepath + " outdir:" + outdir + " classes:" + classes);
         if (sourcepath == null)
             throw new IllegalArgumentException("sourcepath not set");
         if (outdir == null)
             throw new IllegalArgumentException("source output dir not set");
         JavacTool tool = JavacTool.create();
         StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null);
         try {
             fm.setLocation(StandardLocation.SOURCE_OUTPUT, Collections.singleton(outdir));
             fm.setLocation(StandardLocation.SOURCE_PATH, splitPath(sourcepath));
             List<JavaFileObject> files = new ArrayList<JavaFileObject>();
             for (String c: classes) {
                 JavaFileObject fo = fm.getJavaFileForInput(
                         StandardLocation.SOURCE_PATH, c, JavaFileObject.Kind.SOURCE);
                 if (fo == null)
                     error("class not found: " + c);
                 else
                     files.add(fo);
             }
             JavacTask t = tool.getTask(null, fm, null, null, null, files);
             Iterable<? extends CompilationUnitTree> trees = t.parse();
             for (CompilationUnitTree tree: trees) {
                 makeStub(fm, tree);
             }
         } catch (IOException e) {
             error("IO error " + e, e);
         }
         return (errors == 0);
     }
     void makeStub(StandardJavaFileManager fm, CompilationUnitTree tree) throws IOException {
         CompilationUnitTree tree2 = new StubMaker().translate(tree);
         CompilationUnitTree tree3 = new ImportCleaner(fm).removeRedundantImports(tree2);
         String className = fm.inferBinaryName(StandardLocation.SOURCE_PATH, tree.getSourceFile());
         JavaFileObject fo = fm.getJavaFileForOutput(StandardLocation.SOURCE_OUTPUT,
                 className, JavaFileObject.Kind.SOURCE, null);
         // System.err.println("Writing " + className + " to " + fo.getName());
         Writer out = fo.openWriter();
         try {
             new Pretty(out, true).printExpr((JCTree) tree3);
         } finally {
             out.close();
         }
     }
     List<File> splitPath(String path) {
         List<File> list = new ArrayList<File>();
         for (String p: path.split(File.pathSeparator)) {
             if (p.length() > 0)
                 list.add(new File(p));
         }
         return list;
     }
     void error(String message) {
         System.err.println(message);
         errors++;
     }
     void error(String message, Throwable cause) {
         error(message);
     }
     int errors;
     class StubMaker extends TreeTranslator {
         CompilationUnitTree translate(CompilationUnitTree tree) {
             return super.translate((JCCompilationUnit) tree);
         }
         /**
          * compilation units: remove javadoc comments
          * -- required, in order to remove @deprecated tags, since we
          * (separately) remove all annotations, including @Deprecated
          */
         public void visitTopLevel(JCCompilationUnit tree) {
             super.visitTopLevel(tree);
             tree.docComments = null;
         }
         /**
          * methods: remove method bodies, make methods native
          */
         @Override
         public void visitClassDef(JCClassDecl tree) {
             long prevClassMods = currClassMods;
             currClassMods = tree.mods.flags;
             try {
                 super.visitClassDef(tree);;
             } finally {
                 currClassMods = prevClassMods;
             }
         }
         private long currClassMods = 0;
         /**
          * methods: remove method bodies, make methods native
          */
         @Override
         public void visitMethodDef(JCMethodDecl tree) {
             tree.mods = translate(tree.mods);
             tree.restype = translate(tree.restype);
             tree.typarams = translateTypeParams(tree.typarams);
             tree.params = translateVarDefs(tree.params);
             tree.thrown = translate(tree.thrown);
             if (tree.body != null) {
                 if ((currClassMods & Flags.INTERFACE) != 0) {
                     tree.mods.flags &= ~(Flags.DEFAULT | Flags.STATIC);
                 } else {
                     tree.mods.flags |= Flags.NATIVE;
                 }
                 tree.body = null;
             }
             result = tree;
         }
         /**
          * modifiers: remove annotations
          */
         @Override
         public void visitModifiers(JCModifiers tree) {
             tree.annotations = com.sun.tools.javac.util.List.nil();
             result = tree;
         }
         /**
          * field definitions: replace initializers with 0, 0.0, false etc
          * when possible -- i.e. leave public, protected initializers alone
          */
         @Override
         public void visitVarDef(JCVariableDecl tree) {
             tree.mods = translate(tree.mods);
             tree.vartype = translate(tree.vartype);
             if (tree.init != null) {
                 if ((tree.mods.flags & (Flags.PUBLIC | Flags.PROTECTED)) != 0)
                     tree.init = translate(tree.init);
                 else {
                     String t = tree.vartype.toString();
                     if (t.equals("boolean"))
                         tree.init = new JCLiteral(TypeTag.BOOLEAN, 0) { };
                     else if (t.equals("byte"))
                         tree.init = new JCLiteral(TypeTag.BYTE, 0) { };
                     else if (t.equals("char"))
                         tree.init = new JCLiteral(TypeTag.CHAR, 0) { };
                     else if (t.equals("double"))
                         tree.init = new JCLiteral(TypeTag.DOUBLE, 0.d) { };
                     else if (t.equals("float"))
                         tree.init = new JCLiteral(TypeTag.FLOAT, 0.f) { };
                     else if (t.equals("int"))
                         tree.init = new JCLiteral(TypeTag.INT, 0) { };
                     else if (t.equals("long"))
                         tree.init = new JCLiteral(TypeTag.LONG, 0) { };
                     else if (t.equals("short"))
                         tree.init = new JCLiteral(TypeTag.SHORT, 0) { };
                     else
                         tree.init = new JCLiteral(TypeTag.BOT, null) { };
                 }
             }
             result = tree;
         }
     }
     class ImportCleaner extends TreeScanner {
         private Set<Name> names = new HashSet<Name>();
         private TreeMaker m;
         ImportCleaner(JavaFileManager fm) {
             // ImportCleaner itself doesn't require a filemanager, but instantiating
             // a TreeMaker does, indirectly (via ClassReader, sigh)
             Context c = new Context();
             c.put(JavaFileManager.class, fm);
             m = TreeMaker.instance(c);
         }
         CompilationUnitTree removeRedundantImports(CompilationUnitTree t) {
             JCCompilationUnit tree = (JCCompilationUnit) t;
             tree.accept(this);
             ListBuffer<JCTree> defs = new ListBuffer<JCTree>();
             for (JCTree def: tree.defs) {
                 if (def.getTag() == JCTree.Tag.IMPORT) {
                     JCImport imp = (JCImport) def;
                     if (imp.qualid.getTag() == JCTree.Tag.SELECT) {
                         JCFieldAccess qualid = (JCFieldAccess) imp.qualid;
                         if (!qualid.name.toString().equals("*")
                                 && !names.contains(qualid.name)) {
                             continue;
                         }
                     }
                 }
                 defs.add(def);
             }
             return m.TopLevel(tree.packageAnnotations, tree.pid, defs.toList());
         }
         @Override
         public void visitImport(JCImport tree) { } // ignore names found in imports
         @Override
         public void visitIdent(JCIdent tree) {
             names.add(tree.name);
         }
         @Override
         public void visitSelect(JCFieldAccess tree) {
             super.visitSelect(tree);
             names.add(tree.name);
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

make/tools/genstubs/GenStubs.java@05824e9d8171 (annotated)

make/tools/genstubs/GenStubs.java