jdk8-mips64-public/langtools: test/tools/javac/tree/TreeScannerTest.java@4b4e282a3146 (annotated)

test/tools/javac/tree/TreeScannerTest.java@4b4e282a3146 (annotated)

test/tools/javac/tree/TreeScannerTest.java

Thu, 04 Feb 2010 10:14:28 -0800

author: jjg
date: Thu, 04 Feb 2010 10:14:28 -0800
changeset 489: 4b4e282a3146
child 554: 9d9f26857129
permissions: -rw-r--r--

6923080: TreeScanner.visitNewClass should scan tree.typeargs
Reviewed-by: darcy

 /*
  * Copyright 2010 Sun Microsystems, Inc.  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.
  *
  * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */
 /**
  * Utility and test program to check javac's internal TreeScanner class.
  * The program can be run standalone, or as a jtreg test.  For info on
  * command line args, run program with no args.
  *
  * <p>
  * jtreg: Note that by using the -r switch in the test description below, this test
  * will process all java files in the langtools/test directory, thus implicitly
  * covering any new language features that may be tested in this test suite.
  */
 /*
  * @test
  * @bug 6923080
  * @summary TreeScanner.visitNewClass should scan tree.typeargs
  * @run main TreeScannerTest -q -r .
  */
 import java.io.*;
 import java.lang.reflect.*;
 import java.util.*;
 import javax.tools.*;
 import com.sun.source.tree.CompilationUnitTree;
 import com.sun.source.util.JavacTask;
 import com.sun.tools.javac.api.JavacTool;
 import com.sun.tools.javac.tree.*;
 import com.sun.tools.javac.tree.JCTree.*;
 import com.sun.tools.javac.util.List;
 public class TreeScannerTest {
     /**
      * Main entry point.
      * If test.src is set, program runs in jtreg mode, and will throw an Error
      * if any errors arise, otherwise System.exit will be used. In jtreg mode,
      * the default base directory for file args is the value of ${test.src}.
      * In jtreg mode, the -r option can be given to change the default base
      * directory to the root test directory.
      */
     public static void main(String... args) {
         String testSrc = System.getProperty("test.src");
         File baseDir = (testSrc == null) ? null : new File(testSrc);
         boolean ok = new TreeScannerTest().run(baseDir, args);
         if (!ok) {
             if (testSrc != null)  // jtreg mode
                 throw new Error("failed");
             else
                 System.exit(1);
         }
     }
     /**
      * Run the program. A base directory can be provided for file arguments.
      * In jtreg mode, the -r option can be given to change the default base
      * directory to the test root directory. For other options, see usage().
      * @param baseDir base directory for any file arguments.
      * @param args command line args
      * @return true if successful or in gui mode
      */
     boolean run(File baseDir, String... args) {
         if (args.length == 0) {
             usage(System.out);
             return true;
         }
         ArrayList<File> files = new ArrayList<File>();
         for (int i = 0; i < args.length; i++) {
             String arg = args[i];
             if (arg.equals("-q"))
                 quiet = true;
             else if (arg.equals("-v"))
                 verbose = true;
             else if (arg.equals("-r")) {
                 File d = baseDir;
                 while (!new File(d, "TEST.ROOT").exists()) {
                     d = d.getParentFile();
                     if (d == null)
                         throw new Error("cannot find TEST.ROOT");
                 }
                 baseDir = d;
             }
             else if (arg.startsWith("-"))
                 throw new Error("unknown option: " + arg);
             else {
                 while (i < args.length)
                     files.add(new File(baseDir, args[i++]));
             }
         }
         for (File file: files) {
             if (file.exists())
                 test(file);
             else
                 error("File not found: " + file);
         }
         if (fileCount != 1)
             System.err.println(fileCount + " files read");
         if (errors > 0)
             System.err.println(errors + " errors");
         return (errors == 0);
     }
     /**
      * Print command line help.
      * @param out output stream
      */
     void usage(PrintStream out) {
         out.println("Usage:");
         out.println("  java TreeScannerTest options... files...");
         out.println("");
         out.println("where options include:");
         out.println("-q        Quiet: don't report on inapplicable files");
         out.println("-v        Verbose: report on files as they are being read");
         out.println("");
         out.println("files may be directories or files");
         out.println("directories will be scanned recursively");
         out.println("non java files, or java files which cannot be parsed, will be ignored");
         out.println("");
     }
     /**
      * Test a file. If the file is a directory, it will be recursively scanned
      * for java files.
      * @param file the file or directory to test
      */
     void test(File file) {
         if (file.isDirectory()) {
             for (File f: file.listFiles()) {
                 test(f);
             }
             return;
         }
         if (file.isFile() && file.getName().endsWith(".java")) {
             try {
                 if (verbose)
                     System.err.println(file);
                 fileCount++;
                 ScanTester t = new ScanTester();
                 t.test(read(file));
             } catch (ParseException e) {
                 if (!quiet) {
                     error("Error parsing " + file + "\n" + e.getMessage());
                 }
             } catch (IOException e) {
                 error("Error reading " + file + ": " + e);
             }
             return;
         }
         if (!quiet)
             error("File " + file + " ignored");
     }
     /**
      * Read a file.
      * @param file the file to be read
      * @return the tree for the content of the file
      * @throws IOException if any IO errors occur
      * @throws TreePosTest.ParseException if any errors occur while parsing the file
      */
     JCCompilationUnit read(File file) throws IOException, ParseException {
         StringWriter sw = new StringWriter();
         PrintWriter pw = new PrintWriter(sw);
         Reporter r = new Reporter(pw);
         JavacTool tool = JavacTool.create();
         StandardJavaFileManager fm = tool.getStandardFileManager(r, null, null);
         Iterable<? extends JavaFileObject> files = fm.getJavaFileObjects(file);
         JavacTask task = tool.getTask(pw, fm, r, Collections.<String>emptyList(), null, files);
         Iterable<? extends CompilationUnitTree> trees = task.parse();
         pw.flush();
         if (r.errors > 0)
             throw new ParseException(sw.toString());
         Iterator<? extends CompilationUnitTree> iter = trees.iterator();
         if (!iter.hasNext())
             throw new Error("no trees found");
         JCCompilationUnit t = (JCCompilationUnit) iter.next();
         if (iter.hasNext())
             throw new Error("too many trees found");
         return t;
     }
     /**
      * Report an error. When the program is complete, the program will either
      * exit or throw an Error if any errors have been reported.
      * @param msg the error message
      */
     void error(String msg) {
         System.err.println(msg);
         errors++;
     }
     /**
      *  Report an error for a specific tree node.
      *  @param file the source file for the tree
      *  @param t    the tree node
      *  @param label an indication of the error
      */
     void error(JavaFileObject file, JCTree t, String msg) {
         error(file.getName() + ":" + getLine(file, t) + ": " + msg + " " + trim(t, 64));
     }
     /**
      * Get a trimmed string for a tree node, with normalized white space and limited length.
      */
     String trim(JCTree t, int len) {
         String s = t.toString().replaceAll("[\r\n]+", " ").replaceAll(" +", " ");
         return (s.length() < len) ? s : s.substring(0, len);
     }
     /** Number of files that have been analyzed. */
     int fileCount;
     /** Number of errors reported. */
     int errors;
     /** Flag: don't report irrelevant files. */
     boolean quiet;
     /** Flag: report files as they are processed. */
     boolean verbose;
     /**
      * Main class for testing operation of tree scanner.
      * The set of nodes found by the scanner are compared
      * against the set of nodes found by reflection.
      */
     private class ScanTester extends TreeScanner {
         /** Main entry method for the class. */
         void test(JCCompilationUnit tree) {
             sourcefile = tree.sourcefile;
             found = new HashSet<JCTree>();
             scan(tree);
             expect = new HashSet<JCTree>();
             reflectiveScan(tree);
             if (found.equals(expect))
                 return;
             error("Differences found for " + tree.sourcefile.getName());
             if (found.size() != expect.size())
                 error("Size mismatch; found: " + found.size() + ", expected: " + expect.size());
             Set<JCTree> missing = new HashSet<JCTree>();
             missing.addAll(expect);
             missing.removeAll(found);
             for (JCTree t: missing)
                 error(tree.sourcefile, t, "missing");
             Set<JCTree> excess = new HashSet<JCTree>();
             excess.addAll(found);
             excess.removeAll(expect);
             for (JCTree t: excess)
                 error(tree.sourcefile, t, "unexpected");
         }
         /** Record all tree nodes found by scanner. */
         @Override
         public void scan(JCTree tree) {
             if (tree == null)
                 return;
             System.err.println("FOUND: " + tree.getTag() + " " + trim(tree, 64));
             found.add(tree);
             super.scan(tree);
         }
         /** record all tree nodes found by reflection. */
         public void reflectiveScan(Object o) {
             if (o == null)
                 return;
             if (o instanceof JCTree) {
                 JCTree tree = (JCTree) o;
                 System.err.println("EXPECT: " + tree.getTag() + " " + trim(tree, 64));
                 expect.add(tree);
                 for (Field f: getFields(tree)) {
                     try {
                         //System.err.println("FIELD: " + f.getName());
                         reflectiveScan(f.get(tree));
                     } catch (IllegalAccessException e) {
                         error(e.toString());
                     }
                 }
             } else if (o instanceof List) {
                 List<?> list = (List<?>) o;
                 for (Object item: list)
                     reflectiveScan(item);
             } else
                 error("unexpected item: " + o);
         }
         JavaFileObject sourcefile;
         Set<JCTree> found;
         Set<JCTree> expect;
     }
     /**
      * Thrown when errors are found parsing a java file.
      */
     private static class ParseException extends Exception {
         ParseException(String msg) {
             super(msg);
         }
     }
     /**
      * DiagnosticListener to report diagnostics and count any errors that occur.
      */
     private static class Reporter implements DiagnosticListener<JavaFileObject> {
         Reporter(PrintWriter out) {
             this.out = out;
         }
         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
             out.println(diagnostic);
             switch (diagnostic.getKind()) {
                 case ERROR:
                     errors++;
             }
         }
         int errors;
         PrintWriter out;
     }
     /**
      * Get the set of fields for a tree node that may contain child tree nodes.
      * These are the fields that are subtypes of JCTree or List.
      * The results are cached, based on the tree's tag.
      */
     Set<Field> getFields(JCTree tree) {
         Set<Field> fields = map.get(tree.getTag());
         if (fields == null) {
             fields = new HashSet<Field>();
             for (Field f: tree.getClass().getFields()) {
                 Class<?> fc = f.getType();
                 if (JCTree.class.isAssignableFrom(fc) || List.class.isAssignableFrom(fc))
                     fields.add(f);
             }
             map.put(tree.getTag(), fields);
         }
         return fields;
     }
     // where
     Map<Integer, Set<Field>> map = new HashMap<Integer,Set<Field>>();
     /** Get the line number for the primary position for a tree.
      * The code is intended to be simple, although not necessarily efficient.
      * However, note that a file manager such as JavacFileManager is likely
      * to cache the results of file.getCharContent, avoiding the need to read
      * the bits from disk each time this method is called.
      */
     int getLine(JavaFileObject file, JCTree tree) {
         try {
             CharSequence cs = file.getCharContent(true);
             int line = 1;
             for (int i = 0; i < tree.pos; i++) {
                 if (cs.charAt(i) == '\n') // jtreg tests always use Unix line endings
                     line++;
             }
             return line;
         } catch (IOException e) {
             return -1;
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/tree/TreeScannerTest.java@4b4e282a3146 (annotated)

test/tools/javac/tree/TreeScannerTest.java