gt:                         Graph g = new Graph(tree);
context: /*
   * Copyright (c) 2005, 2006, 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.internal.xjc;
  
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.OutputStreamWriter;
  import java.io.PrintStream;
  import java.util.Iterator;
  
  import com.sun.codemodel.internal.CodeWriter;
  import com.sun.codemodel.internal.JCodeModel;
  import com.sun.codemodel.internal.writer.ZipCodeWriter;
  import com.sun.istack.internal.NotNull;
  import com.sun.istack.internal.Nullable;
  import com.sun.tools.internal.xjc.generator.bean.BeanGenerator;
  import com.sun.tools.internal.xjc.model.Model;
  import com.sun.tools.internal.xjc.outline.Outline;
  import com.sun.tools.internal.xjc.reader.gbind.Expression;
  import com.sun.tools.internal.xjc.reader.gbind.Graph;
  import com.sun.tools.internal.xjc.reader.internalizer.DOMForest;
  import com.sun.tools.internal.xjc.reader.xmlschema.ExpressionBuilder;
  import com.sun.tools.internal.xjc.reader.xmlschema.parser.XMLSchemaInternalizationLogic;
  import com.sun.tools.internal.xjc.util.ErrorReceiverFilter;
  import com.sun.tools.internal.xjc.util.NullStream;
  import com.sun.tools.internal.xjc.util.Util;
  import com.sun.tools.internal.xjc.writer.SignatureWriter;
  import com.sun.xml.internal.xsom.XSComplexType;
  import com.sun.xml.internal.xsom.XSParticle;
  import com.sun.xml.internal.xsom.XSSchemaSet;
  
  import org.xml.sax.SAXException;
  import org.xml.sax.SAXParseException;
  
  
  /**
   * CUI of XJC.
   */
  public class Driver {
  
      public static void main(final String[] args) throws Exception {
          // use the platform default proxy if available.
          // see sun.net.spi.DefaultProxySelector for details.
          try {
              System.setProperty("java.net.useSystemProxies","true");
          } catch (SecurityException e) {
              // failing to set this property isn't fatal
          }
  
          if( Util.getSystemProperty(Driver.class,"noThreadSwap")!=null )
              _main(args);    // for the ease of debugging
  
          // run all the work in another thread so that the -Xss option
          // will take effect when compiling a large schema. See
          // http://developer.java.sun.com/developer/bugParade/bugs/4362291.html
          final Throwable[] ex = new Throwable[1];
  
          Thread th = new Thread() {
              public void run() {
                  try {
                      _main(args);
                  } catch( Throwable e ) {
                      ex[0]=e;
                  }
              }
          };
          th.start();
          th.join();
  
          if(ex[0]!=null) {
              // re-throw
              if( ex[0] instanceof Exception )
                  throw (Exception)ex[0];
              else
                  throw (Error)ex[0];
          }
      }
  
      private static void _main( String[] args ) throws Exception {
          try {
              System.exit(run( args, System.out, System.out ));
          } catch (BadCommandLineException e) {
              // there was an error in the command line.
              // print usage and abort.
              if(e.getMessage()!=null) {
                  System.out.println(e.getMessage());
                  System.out.println();
              }
  
              usage(e.getOptions(),false);
              System.exit(-1);
          }
      }
  
  
  
      /**
       * Performs schema compilation and prints the status/error into the
       * specified PrintStream.
       *
       * <p>
       * This method could be used to trigger XJC from other tools,
       * such as Ant or IDE.
       *
       * @param    args
       *      specified command line parameters. If there is an error
       *      in the parameters, {@link BadCommandLineException} will
       *      be thrown.
       * @param    status
       *      Status report of the compilation will be sent to this object.
       *      Useful to update users so that they will know something is happening.
       *      Only ignorable messages should be sent to this stream.
       *
       *      This parameter can be null to suppress messages.
       *
       * @param    out
       *      Various non-ignorable output (error messages, etc)
       *      will go to this stream.
       *
       * @return
       *      If the compiler runs successfully, this method returns 0.
       *      All non-zero values indicate an error. The error message
       *      will be sent to the specified PrintStream.
       */
      public static int run(String[] args, final PrintStream status, final PrintStream out)
          throws Exception {
  
          class Listener extends XJCListener {
              ConsoleErrorReporter cer = new ConsoleErrorReporter(out==null?new PrintStream(new NullStream()):out);
  
              public void generatedFile(String fileName, int count, int total) {
                  message(fileName);
              }
              public void message(String msg) {
                  if(status!=null)
                      status.println(msg);
              }
  
              public void error(SAXParseException exception) {
                  cer.error(exception);
              }
  
              public void fatalError(SAXParseException exception) {
                  cer.fatalError(exception);
              }
  
              public void warning(SAXParseException exception) {
                  cer.warning(exception);
              }
  
              public void info(SAXParseException exception) {
                  cer.info(exception);
              }
          }
  
          return run(args,new Listener());
      }
  
      /**
       * Performs schema compilation and prints the status/error into the
       * specified PrintStream.
       *
       * <p>
       * This method could be used to trigger XJC from other tools,
       * such as Ant or IDE.
       *
       * @param    args
       *        specified command line parameters. If there is an error
       *        in the parameters, {@link BadCommandLineException} will
       *        be thrown.
       * @param    listener
       *      Receives messages from XJC reporting progress/errors.
       *
       * @return
       *      If the compiler runs successfully, this method returns 0.
       *      All non-zero values indicate an error. The error message
       *      will be sent to the specified PrintStream.
       */
      public static int run(String[] args, @NotNull final XJCListener listener) throws BadCommandLineException {
  
          // recognize those special options before we start parsing options.
          for (String arg : args) {
              if (arg.equals("-version")) {
                  listener.message(Messages.format(Messages.VERSION));
                  return -1;
              }
          }
  
          final OptionsEx opt = new OptionsEx();
          opt.setSchemaLanguage(Language.XMLSCHEMA);  // disable auto-guessing
          try {
              opt.parseArguments(args);
          } catch (WeAreDone _) {
              return -1;
          } catch(BadCommandLineException e) {
              e.initOptions(opt);
              throw e;
          }
  
          // display a warning if the user specified the default package
          // this should work, but is generally a bad idea
          if(opt.defaultPackage != null && opt.defaultPackage.length()==0) {
              listener.message(Messages.format(Messages.WARNING_MSG, Messages.format(Messages.DEFAULT_PACKAGE_WARNING)));
          }
  
  
          // set up the context class loader so that the user-specified classes
          // can be loaded from there
          final ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
          Thread.currentThread().setContextClassLoader(
              opt.getUserClassLoader(contextClassLoader));
  
          // parse a grammar file
          //-----------------------------------------
          try {
              if( !opt.quiet ) {
                  listener.message(Messages.format(Messages.PARSING_SCHEMA));
              }
  
              final boolean[] hadWarning = new boolean[1];
  
              ErrorReceiver receiver = new ErrorReceiverFilter(listener) {
                  public void info(SAXParseException exception) {
                      if(opt.verbose)
                          super.info(exception);
                  }
                  public void warning(SAXParseException exception) {
                      hadWarning[0] = true;
                      if(!opt.quiet)
                          super.warning(exception);
                  }
                  @Override
                  public void pollAbort() throws AbortException {
                      if(listener.isCanceled())
                          throw new AbortException();
                  }
              };
  
              if( opt.mode==Mode.FOREST ) {
                  // dump DOM forest and quit
                  ModelLoader loader  = new ModelLoader( opt, new JCodeModel(), receiver );
                  try {
                      DOMForest forest = loader.buildDOMForest(new XMLSchemaInternalizationLogic());
                      forest.dump(System.out);
                      return 0;
                  } catch (SAXException e) {
                      // the error should have already been reported
                  } catch (IOException e) {
                      receiver.error(e);
                  }
  
                  return -1;
              }
  
              if( opt.mode==Mode.GBIND ) {
                  try {
                      XSSchemaSet xss = new ModelLoader(opt, new JCodeModel(), receiver).loadXMLSchema();
                      Iterator<XSComplexType> it = xss.iterateComplexTypes();
                      while (it.hasNext()) {
                          XSComplexType ct =  it.next();
                          XSParticle p = ct.getContentType().asParticle();
                          if(p==null)     continue;
  
                          Expression tree = ExpressionBuilder.createTree(p);
                          System.out.println("Graph for "+ct.getName());
                          System.out.println(tree.toString());
  