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

 /*

  * Copyright (c) 1999, 2011, 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.javac.main;

 import java.io.File;

 import java.io.IOException;

 import java.io.PrintWriter;

 import java.net.URL;

 import java.security.DigestInputStream;

 import java.security.MessageDigest;

 import java.util.Collection;

 import java.util.LinkedHashSet;

 import java.util.MissingResourceException;

 import java.util.Set;

 import javax.tools.JavaFileManager;

 import javax.tools.JavaFileObject;

 import javax.annotation.processing.Processor;

 import com.sun.tools.javac.code.Source;

 import com.sun.tools.javac.file.CacheFSInfo;

 import com.sun.tools.javac.file.JavacFileManager;

 import com.sun.tools.javac.jvm.Target;

 import com.sun.tools.javac.main.JavacOption.Option;

 import com.sun.tools.javac.main.RecognizedOptions.OptionHelper;

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

 import com.sun.tools.javac.processing.AnnotationProcessingError;

 import static com.sun.tools.javac.main.OptionName.*;

 /** This class provides a commandline interface to the GJC compiler.

  *

  *  <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>

  */

 public class Main {

     /** The name of the compiler, for use in diagnostics.

      */

     String ownName;

     /** The writer to use for diagnostic output.

      */

     PrintWriter out;

     /**

      * If true, certain errors will cause an exception, such as command line

      * arg errors, or exceptions in user provided code.

      */

     boolean apiMode;

     /** Result codes.

      */

     static final int

         EXIT_OK = 0,        // Compilation completed with no errors.

         EXIT_ERROR = 1,     // Completed but reported errors.

         EXIT_CMDERR = 2,    // Bad command-line arguments

         EXIT_SYSERR = 3,    // System error or resource exhaustion.

         EXIT_ABNORMAL = 4;  // Compiler terminated abnormally

     private Option[] recognizedOptions = RecognizedOptions.getJavaCompilerOptions(new OptionHelper() {

         public void setOut(PrintWriter out) {

             Main.this.out = out;

         }

         public void error(String key, Object... args) {

             Main.this.error(key, args);

         }

         public void printVersion() {

             Log.printLines(out, getLocalizedString("version", ownName,  JavaCompiler.version()));

         }

         public void printFullVersion() {

             Log.printLines(out, getLocalizedString("fullVersion", ownName,  JavaCompiler.fullVersion()));

         }

         public void printHelp() {

             help();

         }

         public void printXhelp() {

             xhelp();

         }

         public void addFile(File f) {

             filenames.add(f);

         }

         public void addClassName(String s) {

             classnames.append(s);

         }

     });

     /**

      * Construct a compiler instance.

      */

     public Main(String name) {

         this(name, new PrintWriter(System.err, true));

     }

     /**

      * Construct a compiler instance.

      */

     public Main(String name, PrintWriter out) {

         this.ownName = name;

         this.out = out;

     }

     /** A table of all options that's passed to the JavaCompiler constructor.  */

     private Options options = null;

     /** The list of source files to process

      */

     public Set<File> filenames = null; // XXX sb protected

     /** List of class files names passed on the command line

      */

     public ListBuffer<String> classnames = null; // XXX sb protected

     /** Print a string that explains usage.

      */

     void help() {

         Log.printLines(out, getLocalizedString("msg.usage.header", ownName));

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

             recognizedOptions[i].help(out);

         }

         out.println();

     }

     /** Print a string that explains usage for X options.

      */

     void xhelp() {

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

             recognizedOptions[i].xhelp(out);

         }

         out.println();

         Log.printLines(out, getLocalizedString("msg.usage.nonstandard.footer"));

     }

     /** Report a usage error.

      */

     void error(String key, Object... args) {

         if (apiMode) {

             String msg = getLocalizedString(key, args);

             throw new PropagatedException(new IllegalStateException(msg));

         }

         warning(key, args);

         Log.printLines(out, getLocalizedString("msg.usage", ownName));

     }

     /** Report a warning.

      */

     void warning(String key, Object... args) {

         Log.printLines(out, ownName + ": "

                        + getLocalizedString(key, args));

     }

     public Option getOption(String flag) {

         for (Option option : recognizedOptions) {

             if (option.matches(flag))

                 return option;

         }

         return null;

     }

     public void setOptions(Options options) {

         if (options == null)

             throw new NullPointerException();

         this.options = options;

     }

     public void setAPIMode(boolean apiMode) {

         this.apiMode = apiMode;

     }

     /** Process command line arguments: store all command line options

      *  in `options' table and return all source filenames.

      *  @param flags    The array of command line arguments.

      */

     public Collection<File> processArgs(String[] flags) { // XXX sb protected

         int ac = 0;

         while (ac < flags.length) {

             String flag = flags[ac];

             ac++;

             Option option = null;

             if (flag.length() > 0) {

                 // quick hack to speed up file processing:

                 // if the option does not begin with '-', there is no need to check

                 // most of the compiler options.

                 int firstOptionToCheck = flag.charAt(0) == '-' ? 0 : recognizedOptions.length-1;

                 for (int j=firstOptionToCheck; j<recognizedOptions.length; j++) {

                     if (recognizedOptions[j].matches(flag)) {

                         option = recognizedOptions[j];

                         break;

                     }

                 }

             }

             if (option == null) {

                 error("err.invalid.flag", flag);

                 return null;

             }

             if (option.hasArg()) {

                 if (ac == flags.length) {

                     error("err.req.arg", flag);

                     return null;

                 }

                 String operand = flags[ac];

                 ac++;

                 if (option.process(options, flag, operand))

                     return null;

             } else {

                 if (option.process(options, flag))

                     return null;

             }

         }

         if (!checkDirectory(D))

             return null;

         if (!checkDirectory(S))

             return null;

         String sourceString = options.get(SOURCE);

         Source source = (sourceString != null)

             ? Source.lookup(sourceString)

             : Source.DEFAULT;

         String targetString = options.get(TARGET);

         Target target = (targetString != null)

             ? Target.lookup(targetString)

             : Target.DEFAULT;

         // We don't check source/target consistency for CLDC, as J2ME

         // profiles are not aligned with J2SE targets; moreover, a

         // single CLDC target may have many profiles.  In addition,

         // this is needed for the continued functioning of the JSR14

         // prototype.

         if (Character.isDigit(target.name.charAt(0))) {

             if (target.compareTo(source.requiredTarget()) < 0) {

                 if (targetString != null) {

                     if (sourceString == null) {

                         warning("warn.target.default.source.conflict",

                                 targetString,

                                 source.requiredTarget().name);

                     } else {

                         warning("warn.source.target.conflict",

                                 sourceString,

                                 source.requiredTarget().name);

                     }

                     return null;

                 } else {

                     target = source.requiredTarget();

                     options.put("-target", target.name);

                 }

             } else {

                 if (targetString == null && !source.allowGenerics()) {

                     target = Target.JDK1_4;

                     options.put("-target", target.name);

                 }

             }

         }

         // handle this here so it works even if no other options given

         String showClass = options.get("showClass");

         if (showClass != null) {

             if (showClass.equals("showClass")) // no value given for option

                 showClass = "com.sun.tools.javac.Main";

             showClass(showClass);

         }

         return filenames;

     }

     // where

         private boolean checkDirectory(OptionName optName) {

             String value = options.get(optName);

             if (value == null)

                 return true;

             File file = new File(value);

             if (!file.exists()) {

                 error("err.dir.not.found", value);

                 return false;

             }

             if (!file.isDirectory()) {

                 error("err.file.not.directory", value);

                 return false;

             }

             return true;

         }

     /** Programmatic interface for main function.

      * @param args    The command line parameters.

      */

     public int compile(String[] args) {

         Context context = new Context();

         JavacFileManager.preRegister(context); // can't create it until Log has been set up

         int result = compile(args, context);

         if (fileManager instanceof JavacFileManager) {

             // A fresh context was created above, so jfm must be a JavacFileManager

             ((JavacFileManager)fileManager).close();

         }

         return result;

     }

     public int compile(String[] args, Context context) {

         return compile(args, context, List.<JavaFileObject>nil(), null);

     }

     /** Programmatic interface for main function.

      * @param args    The command line parameters.

      */

     public int compile(String[] args,

                        Context context,

                        List<JavaFileObject> fileObjects,

                        Iterable<? extends Processor> processors)

     {

         if (options == null)

             options = Options.instance(context); // creates a new one

         filenames = new LinkedHashSet<File>();

         classnames = new ListBuffer<String>();

         JavaCompiler comp = null;

         /*

          * TODO: Logic below about what is an acceptable command line

          * should be updated to take annotation processing semantics

          * into account.

          */

         try {

             if (args.length == 0 && fileObjects.isEmpty()) {

                 help();

                 return EXIT_CMDERR;

             }

             Collection<File> files;

             try {

                 files = processArgs(CommandLine.parse(args));

                 if (files == null) {

                     // null signals an error in options, abort

                     return EXIT_CMDERR;

                 } else if (files.isEmpty() && fileObjects.isEmpty() && classnames.isEmpty()) {

                     // it is allowed to compile nothing if just asking for help or version info

                     if (options.isSet(HELP)

                         || options.isSet(X)

                         || options.isSet(VERSION)

                         || options.isSet(FULLVERSION))

                         return EXIT_OK;

                     if (JavaCompiler.explicitAnnotationProcessingRequested(options)) {

                         error("err.no.source.files.classes");

                     } else {

                         error("err.no.source.files");

                     }

                     return EXIT_CMDERR;

                 }

             } catch (java.io.FileNotFoundException e) {

                 Log.printLines(out, ownName + ": " +

                                getLocalizedString("err.file.not.found",

                                                   e.getMessage()));

                 return EXIT_SYSERR;

             }

             boolean forceStdOut = options.isSet("stdout");

             if (forceStdOut) {

                 out.flush();

                 out = new PrintWriter(System.out, true);

             }

             context.put(Log.outKey, out);

             // allow System property in following line as a Mustang legacy

             boolean batchMode = (options.isUnset("nonBatchMode")

                         && System.getProperty("nonBatchMode") == null);

             if (batchMode)

                 CacheFSInfo.preRegister(context);

             fileManager = context.get(JavaFileManager.class);

             comp = JavaCompiler.instance(context);

             if (comp == null) return EXIT_SYSERR;

             Log log = Log.instance(context);

             if (!files.isEmpty()) {

                 // add filenames to fileObjects

                 comp = JavaCompiler.instance(context);

                 List<JavaFileObject> otherFiles = List.nil();

                 JavacFileManager dfm = (JavacFileManager)fileManager;

                 for (JavaFileObject fo : dfm.getJavaFileObjectsFromFiles(files))

                     otherFiles = otherFiles.prepend(fo);

                 for (JavaFileObject fo : otherFiles)

                     fileObjects = fileObjects.prepend(fo);

             }

             comp.compile(fileObjects,

                          classnames.toList(),

                          processors);

             if (log.expectDiagKeys != null) {

                 if (log.expectDiagKeys.isEmpty()) {

                     Log.printLines(log.noticeWriter, "all expected diagnostics found");

                     return EXIT_OK;

                 } else {

                     Log.printLines(log.noticeWriter, "expected diagnostic keys not found: " + log.expectDiagKeys);

                     return EXIT_ERROR;

                 }

             }

             if (comp.errorCount() != 0)

                 return EXIT_ERROR;

         } catch (IOException ex) {

             ioMessage(ex);

             return EXIT_SYSERR;

         } catch (OutOfMemoryError ex) {

             resourceMessage(ex);

             return EXIT_SYSERR;

         } catch (StackOverflowError ex) {

             resourceMessage(ex);

             return EXIT_SYSERR;

         } catch (FatalError ex) {

             feMessage(ex);

             return EXIT_SYSERR;

         } catch (AnnotationProcessingError ex) {

             if (apiMode)

                 throw new RuntimeException(ex.getCause());

             apMessage(ex);

             return EXIT_SYSERR;

         } catch (ClientCodeException ex) {

             // as specified by javax.tools.JavaCompiler#getTask

             // and javax.tools.JavaCompiler.CompilationTask#call

             throw new RuntimeException(ex.getCause());

         } catch (PropagatedException ex) {

             throw ex.getCause();

         } catch (Throwable ex) {

             // Nasty.  If we've already reported an error, compensate

             // for buggy compiler error recovery by swallowing thrown

             // exceptions.

             if (comp == null || comp.errorCount() == 0 ||

                 options == null || options.isSet("dev"))

                 bugMessage(ex);

             return EXIT_ABNORMAL;

         } finally {

             if (comp != null) {

                 try {

                     comp.close();

                 } catch (ClientCodeException ex) {

                     throw new RuntimeException(ex.getCause());

                 }

             }

             filenames = null;

             options = null;

         }

         return EXIT_OK;

     }

     /** Print a message reporting an internal error.

      */

     void bugMessage(Throwable ex) {

         Log.printLines(out, getLocalizedString("msg.bug",

                                                JavaCompiler.version()));

         ex.printStackTrace(out);

     }

     /** Print a message reporting a fatal error.

      */

     void feMessage(Throwable ex) {

         Log.printLines(out, ex.getMessage());

         if (ex.getCause() != null && options.isSet("dev")) {

             ex.getCause().printStackTrace(out);

         }

     }

     /** Print a message reporting an input/output error.

      */

     void ioMessage(Throwable ex) {

         Log.printLines(out, getLocalizedString("msg.io"));

         ex.printStackTrace(out);

     }

     /** Print a message reporting an out-of-resources error.

      */

     void resourceMessage(Throwable ex) {

         Log.printLines(out, getLocalizedString("msg.resource"));

 //      System.out.println("(name buffer len = " + Name.names.length + " " + Name.nc);//DEBUG

         ex.printStackTrace(out);

     }

     /** Print a message reporting an uncaught exception from an

      * annotation processor.

      */

     void apMessage(AnnotationProcessingError ex) {

         Log.printLines(out,

                        getLocalizedString("msg.proc.annotation.uncaught.exception"));

         ex.getCause().printStackTrace(out);

     }

     /** Display the location and checksum of a class. */

     void showClass(String className) {

         out.println("javac: show class: " + className);

         URL url = getClass().getResource('/' + className.replace('.', '/') + ".class");

         if (url == null)

             out.println("  class not found");

         else {

             out.println("  " + url);

             try {

                 final String algorithm = "MD5";

                 byte[] digest;

                 MessageDigest md = MessageDigest.getInstance(algorithm);

                 DigestInputStream in = new DigestInputStream(url.openStream(), md);

                 try {

                     byte[] buf = new byte[8192];

                     int n;

                     do { n = in.read(buf); } while (n > 0);

                     digest = md.digest();

                 } finally {

                     in.close();

                 }

                 StringBuilder sb = new StringBuilder();

                 for (byte b: digest)

                     sb.append(String.format("%02x", b));

                 out.println("  " + algorithm + " checksum: " + sb);

             } catch (Exception e) {

                 out.println("  cannot compute digest: " + e);

             }

         }

     }

     private JavaFileManager fileManager;

     /* ************************************************************************

      * Internationalization

      *************************************************************************/

     /** Find a localized string in the resource bundle.

      *  @param key     The key for the localized string.

      */

     public static String getLocalizedString(String key, Object... args) { // FIXME sb private

         try {

             if (messages == null)

                 messages = new JavacMessages(javacBundleName);

             return messages.getLocalizedString("javac." + key, args);

         }

         catch (MissingResourceException e) {

             throw new Error("Fatal Error: Resource for javac is missing", e);

         }

     }

     public static void useRawMessages(boolean enable) {

         if (enable) {

             messages = new JavacMessages(javacBundleName) {

                     @Override

                     public String getLocalizedString(String key, Object... args) {

                         return key;

                     }

                 };

         } else {

             messages = new JavacMessages(javacBundleName);

         }

     }

     private static final String javacBundleName =

         "com.sun.tools.javac.resources.javac";

     private static JavacMessages messages;

 }