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.

  *

  * 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.

  */

 /*

  * @test

  * @bug 7157626 8001112

  * @summary Test major version for all legal combinations for -source and -target

  * @author sgoel

  *

  */

 import java.io.*;

 import java.nio.*;

 import java.util.*;

 import java.util.regex.*;

 public class ClassVersionChecker {

     int errors;

     String[] jdk = {"","1.2","1.3","1.4","1.5","1.6","1.7","1.8"};

     File javaFile = null;

     public static void main(String[] args) throws Throwable {

         new ClassVersionChecker().run();

     }

     void run() throws Exception {

         writeTestFile();

         /* Rules applicable for -source and -target combinations

          * 1. If both empty, version num is for 1.7

          * 2. If source is not empty and target is empty, version is based on source

          * 3. If both non-empty, version is based on target

          */

         /* -source (0=>empty,1=>1.2,...) X -target (0=>empty,1=>1.2,...)

          * ver[0][0] => no -source or -target was given

          * -1 => invalid combinations

          */

         int[][] ver =

                 {{52, -1, -1, -1, -1, -1, -1, -1},

                  {48, 46, 47, 48, 49, 50, 51, 52},

                  {48, 46, 47, 48, 49, 50, 51, 52},

                  {48, -1, -1, 48, 49, 50, 51, 52},

                  {52, -1, -1, -1, 49, 50, 51, 52},

                  {52, -1, -1, -1, -1, 50, 51, 52},

                  {52, -1, -1, -1, -1, -1, 51, 52},

                  {52, -1, -1, -1, -1, -1, -1, 52}};

         // Loop to run all possible combinations of source/target values

         for (int i = 0; i< ver.length; i++) {

             for (int j = 0 ; j< ver[i].length; j++) {

                 if(ver[i][j] != -1) {

                     logMsg("Index values for i = " + i + " j = " + j);

                     logMsg("Running for src = " + jdk[i] + " target = "+jdk[j] +" expected = " + ver[i][j]);

                     test(i,j, ver[i][j]);

                 }

             }

         }

         if (errors > 0)

             throw new Exception(errors + " errors found");

     }

     void test (int i, int j, int expected) {

         File classFile = compileTestFile(i, j, javaFile);

         short majorVer = getMajorVersion(classFile);

         checkVersion(majorVer, expected);

     }

     void writeTestFile() throws IOException {

         javaFile = new File("Test.java");

         try(PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(javaFile)));) {

             out.println("class Test { ");

             out.println("  public void foo() { }");

             out.println("}");

         } catch (IOException ioe) {

             error("IOException while creating Test.java" + ioe);

         }

     }

     File compileTestFile(int i , int j, File f) {

         int rc = -1;

         // Src and target are empty

         if (i == 0 && j == 0 ) {

             rc = compile("-g", f.getPath());

         } else if( j == 0 ) {  // target is empty

             rc = compile("-source", jdk[i], "-g", f.getPath());

         } else {

             rc = compile("-source", jdk[i], "-target", jdk[j], "-g", f.getPath());

         }

         if (rc != 0)

             throw new Error("compilation failed. rc=" + rc);

         String path = f.getPath();

         return new File(path.substring(0, path.length() - 5) + ".class");

     }

     int compile(String... args) {

         return com.sun.tools.javac.Main.compile(args);

     }

     void logMsg (String str) {

         System.out.println(str);

     }

     short getMajorVersion(File f) {

         List<String> args = new ArrayList<String>();

         short majorVer = 0;

         try(DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(f)));) {

             in.readInt();

             in.readShort();

             majorVer = in.readShort();

             System.out.println("major version:" +  majorVer);

         } catch (IOException e) {

             error("IOException while reading Test.class" + e);

         }

         return majorVer;

     }

     void checkVersion(short majorVer, int expected) {

         if (majorVer != expected ) {

             error("versions did not match, Expected: " + expected + "Got: " + majorVer);

         }

     }

     void error(String msg) {

        System.out.println("error: " + msg);

        errors++;

     }

 }