build_tools/doctool/src/com/google/doctool/DocTool.java - gwt - Git at Google

 /*
  * Copyright 2006 Google Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
  * use this file except in compliance with the License. You may obtain a copy of
  * the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  * License for the specific language governing permissions and limitations under
  * the License.
  */
 package com.google.doctool;

 import org.xml.sax.Attributes;
 import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
 import org.xml.sax.XMLReader;
 import org.xml.sax.helpers.DefaultHandler;

 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.PrintStream;
 import java.io.StringReader;
 import java.io.StringWriter;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;

 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.parsers.SAXParser;
 import javax.xml.parsers.SAXParserFactory;
 import javax.xml.transform.Transformer;
 import javax.xml.transform.TransformerConfigurationException;
 import javax.xml.transform.TransformerException;
 import javax.xml.transform.TransformerFactory;
 import javax.xml.transform.stream.StreamResult;
 import javax.xml.transform.stream.StreamSource;

 /**
  * Orchestrates the behavior of {@link Booklet}, {@link SplitterJoiner} and
  * other tools to create user documentation and API documentation.
  */
 public class DocTool {

   private class ImageCopier extends DefaultHandler {

     private final File htmlDir;

     private ImageCopier(File htmlDir) {
       this.htmlDir = htmlDir;
     }

     public void startElement(String uri, String localName, String qName,
         Attributes attributes) throws SAXException {
       if (qName.equalsIgnoreCase("img")) {
         String imgSrc = attributes.getValue("src");
         if (imgSrc != null) {
           boolean found = false;
           for (int i = 0, n = imagePath.length; i < n; ++i) {
             File dir = imagePath[i];
             File inFile = new File(dir, imgSrc);
             if (inFile.exists()) {
               // Copy it over.
               //
               found = true;
               File outFile = new File(htmlDir, imgSrc);

               if (outFile.exists()) {
                 if (outFile.lastModified() > inFile.lastModified()) {
                   // Already up to date.
                   break;
                 }
               } else {
                 File outFileDir = outFile.getParentFile();
                 if (!outFileDir.exists() && !outFileDir.mkdirs()) {
                   err.println("Unable to create image output dir " + outFileDir);
                   break;
                 }
               }
               if (!copyFile(inFile, outFile)) {
                 err.println("Unable to copy image file " + outFile);
               }
             }
           }
           if (!found) {
             err.println("Unable to find image " + imgSrc);
           }
         }
       }
     }
   }

   private static final Pattern IN_XML_FILENAME = Pattern.compile(
       "(.+)\\.([^\\.]+)\\.xml", Pattern.CASE_INSENSITIVE);

   public static void main(String[] args) {
     DocToolFactory factory = new DocToolFactory();
     String arg;
     String pathSep = System.getProperty("path.separator");
     for (int i = 0, n = args.length; i < n; ++i) {
       if (tryParseFlag(args, i, "-help")) {
         printHelp();
         return;
       } else if (null != (arg = tryParseArg(args, i, "-out"))) {
         ++i;
         factory.setOutDir(arg);
       } else if (null != (arg = tryParseArg(args, i, "-html"))) {
         ++i;
         factory.setGenerateHtml(true);
         factory.setTitle(arg);

         // Slurp every arg not prefixed with "-".
         for (; i + 1 < n && !args[i + 1].startsWith("-"); ++i) {
           factory.addHtmlFileBase(args[i + 1]);
         }
       } else if (null != (arg = tryParseArg(args, i, "-overview"))) {
         ++i;
         factory.setOverviewFile(arg);
       } else if (null != (arg = tryParseArg(args, i, "-sourcepath"))) {
         ++i;
         String[] entries = arg.split("\\" + pathSep);
         for (int entryIndex = 0; entryIndex < entries.length; entryIndex++) {
           factory.addToSourcePath(entries[entryIndex]);
         }
       } else if (null != (arg = tryParseArg(args, i, "-classpath"))) {
         ++i;
         String[] entries = arg.split("\\" + pathSep);
         for (int entryIndex = 0; entryIndex < entries.length; entryIndex++) {
           factory.addToClassPath(entries[entryIndex]);
         }
       } else if (null != (arg = tryParseArg(args, i, "-packages"))) {
         ++i;
         String[] entries = arg.split("\\" + pathSep);
         for (int entryIndex = 0; entryIndex < entries.length; entryIndex++) {
           factory.addToPackages(entries[entryIndex]);
         }
       } else if (null != (arg = tryParseArg(args, i, "-imagepath"))) {
         ++i;
         String[] entries = arg.split("\\" + pathSep);
         for (int entryIndex = 0; entryIndex < entries.length; entryIndex++) {
           factory.addToImagePath(entries[entryIndex]);
         }
       } else {
         if (factory.getFileType() == null) {
           factory.setFileType(args[i]);
         } else {
           factory.setFileBase(args[i]);
         }
       }
     }

     DocTool docTool = factory.create(System.out, System.err);
     if (docTool != null) {
       docTool.process();
     }
   }

   public static boolean recursiveDelete(File file) {
     if (file.isDirectory()) {
       File[] children = file.listFiles();
       if (children != null) {
         for (int i = 0; i < children.length; i++) {
           if (!recursiveDelete(children[i])) {
             return false;
           }
         }
       }
     }
     if (!file.delete()) {
       System.err.println("Unable to delete " + file.getAbsolutePath());
       return false;
     }
     return true;
   }

   private static void printHelp() {
     String s = "";
     s += "DocTool (filetype filebase)? [docset-creation-options] [html-creation-options]\n";
     s += "    Creates structured javadoc xml output from Java source and/or\n";
     s += "    a table of contents and a set of cross-linked html files.\n";
     s += "    Specifying filebase/filetype produces output file \"filebase.filetype.xml\".\n";
     s += "    Specifying -html produces output files in ${out}/html.\n";
     s += "\n";
     s += "[docset-creation-options] are\n";
     s += "  -out\n";
     s += "    The output directory\n";
     s += "  -overview\n";
     s += "    The overview html file for this doc set\n";
     s += "  -sourcepath path\n";
     s += "    The path to find Java source for this doc set\n";
     s += "  -classpath path\n";
     s += "    The path to find imported classes for this doc set\n";
     s += "  -packages package-names\n";
     s += "    The command-separated list of package names to include in this doc set\n";
     s += "\n";
     s += "[html-creation-options] are\n";
     s += "  -html title filebase+\n";
     s += "    Causes topics in the named filebase(s) to be merged and converted into html\n";
     s += "  -imagepath\n";
     s += "    The semicolon-separated path to find images for html\n";
     System.out.println(s);
   }

   /**
    * Parse a flag with a argument.
    */
   private static String tryParseArg(String[] args, int i, String name) {
     if (i < args.length) {
       if (args[i].equals(name)) {
         if (i + 1 < args.length) {
           String arg = args[i + 1];
           if (arg.startsWith("-")) {
             System.out.println("Warning: arg to " + name
                 + " looks more like a flag: " + arg);
           }
           return arg;
         } else {
           throw new IllegalArgumentException("Expecting an argument after "
               + name);
         }
       }
     }
     return null;
   }

   /**
    * Parse just a flag with no subsequent argument.
    */
   private static boolean tryParseFlag(String[] args, int i, String name) {
     if (i < args.length) {
       if (args[i].equals(name)) {
         return true;
       }
     }
     return false;
   }

   private final File[] classPath;

   private final String[] packages;

   private final PrintStream err;

   private final String base;

   private final String fileType;

   private final boolean generateHtml;

   private final String[] htmlFileBases;

   private final File[] imagePath;

   private final PrintStream out;

   private final File outDir;

   private final File overviewFile;

   private final File[] sourcePath;

   private final String title;

   DocTool(PrintStream out, PrintStream err, File outDir, boolean generateHtml,
       String title, String[] htmlFileBases, String fileType, String fileBase,
       File overviewFile, File[] sourcePath, File[] classPath,
       String[] packages, File[] imagePath) {
     this.out = out;
     this.err = err;
     this.outDir = outDir;
     this.generateHtml = generateHtml;
     this.base = fileBase;
     this.fileType = fileType;
     this.overviewFile = overviewFile;
     this.sourcePath = sourcePath;
     this.classPath = classPath;
     this.packages = packages;
     this.imagePath = imagePath;
     this.title = title;
     this.htmlFileBases = htmlFileBases.clone();
   }

   public boolean copyFile(File in, File out) {
     FileInputStream fis = null;
     FileOutputStream fos = null;
     try {
       fis = new FileInputStream(in);
       fos = new FileOutputStream(out);
       byte[] buf = new byte[4096];
       int i = 0;
       while ((i = fis.read(buf)) != -1) {
         fos.write(buf, 0, i);
       }
       return true;
     } catch (IOException e) {
       return false;
     } finally {
       close(fis);
       close(fos);
     }
   }

   private void close(InputStream is) {
     if (is != null) {
       try {
         is.close();
       } catch (IOException e) {
         e.printStackTrace(err);
       }
     }
   }

   private void close(OutputStream os) {
     if (os != null) {
       try {
         os.close();
       } catch (IOException e) {
         e.printStackTrace(err);
       }
     }
   }

   private boolean copyImages(File htmlDir, File mergedTopicsFile) {
     FileReader fileReader = null;
     Throwable caught = null;
     try {
       fileReader = new FileReader(mergedTopicsFile);
       SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
       InputSource inputSource = new InputSource(fileReader);
       XMLReader xmlReader = parser.getXMLReader();
       xmlReader.setContentHandler(new ImageCopier(htmlDir));
       xmlReader.parse(inputSource);
       return true;
     } catch (SAXException e) {
       caught = e;
       Exception inner = e.getException();
       if (inner != null) {
         caught = inner;
       }
     } catch (ParserConfigurationException e) {
       caught = e;
     } catch (IOException e) {
       caught = e;
     } finally {
       try {
         if (fileReader != null) {
           fileReader.close();
         }
       } catch (IOException e) {
         e.printStackTrace(err);
       }
     }
     caught.printStackTrace(err);
     return false;
   }

   private Set findSourcePackages() {
     Set results = new HashSet();
     for (int i = 0, n = sourcePath.length; i < n; ++i) {
       File srcDir = sourcePath[i];
       findSourcePackages(results, srcDir, "");
     }
     return results;
   }

   private void findSourcePackages(Set results, File dir, String parentPackage) {
     File[] children = dir.listFiles();
     if (children != null) {
       for (int i = 0, n = children.length; i < n; ++i) {
         File child = children[i];
         String childName = parentPackage
             + (parentPackage.length() > 0 ? "." : "") + child.getName();
         if (child.isDirectory()) {
           // Recurse
           findSourcePackages(results, child, childName);
         } else if (child.getName().endsWith(".java")) {
           // Only include this dir as a result if there's at least one java file
           results.add(parentPackage);
         }
       }
     }
   }

   private String flattenPath(File[] entries) {
     String pathSep = System.getProperty("path.separator");
     String path = "";
     for (int i = 0, n = entries.length; i < n; ++i) {
       File entry = entries[i];
       if (i > 0) {
         path += pathSep;
       }
       path += entry.getAbsolutePath();
     }
     return path;
   }

   private void freshenIf(File file) {
     if (!file.isFile()) {
       return;
     }

     String name = file.getName();
     Matcher matcher = IN_XML_FILENAME.matcher(name);
     if (matcher.matches()) {
       String suffix = "." + matcher.group(2) + ".xml";
       File topicFile = tryReplaceSuffix(file, suffix, ".topics.xml");
       if (topicFile != null) {
         if (file.lastModified() > topicFile.lastModified()) {
           String xsltFileName = matcher.group(2) + "-" + "topics.xslt";
           String xslt = getFileFromClassPath(xsltFileName); // yucky slow
           out.println(file + " -> " + topicFile);
           transform(xslt, file, topicFile, null);
         }
       }
     }
   }

   private boolean genHtml() {
     // Make sure the html directory exists.
     //
     File htmlDir = new File(outDir, "html");
     if (!htmlDir.exists() && !htmlDir.mkdirs()) {
       err.println("Cannot create html output directory "
           + htmlDir.getAbsolutePath());
       return false;
     }

     // Merge all *.topics.xml into one topics.xml file.
     //
     File mergedTopicsFile = new File(outDir, "topics.xml");
     if (!mergeTopics(mergedTopicsFile)) {
       return false;
     }

     // Parse it all to find the images and copy them over.
     //
     copyImages(htmlDir, mergedTopicsFile);

     // Transform to merged topics into merged htmls.
     //
     File mergedHtmlsFile = new File(htmlDir, "topics.htmls");
     long lastModifiedHtmls = mergedHtmlsFile.lastModified();
     long lastModifiedTopics = mergedTopicsFile.lastModified();
     if (!mergedHtmlsFile.exists() || lastModifiedHtmls < lastModifiedTopics) {
       String xsltHtmls = getFileFromClassPath("topics-htmls.xslt");

       Map params = new HashMap();
       params.put("title", title);

       transform(xsltHtmls, mergedTopicsFile, mergedHtmlsFile, params);

       // Split the merged htmls into many html files.
       //
       if (!splitHtmls(mergedHtmlsFile)) {
         return false;
       }

       // Create a table of contents.
       //
       File tocFile = new File(htmlDir, "contents.html");
       String xsltToc = getFileFromClassPath("topics-toc.xslt");
       transform(xsltToc, mergedTopicsFile, tocFile, params);

       // Copy the CSS file over.
       //
       String css = getFileFromClassPath("doc.css");
       try {
         FileWriter cssWriter = new FileWriter(new File(htmlDir, "doc.css"));
         cssWriter.write(css);
         cssWriter.close();
       } catch (IOException e) {
         e.printStackTrace(err);
       }
     } else {
       out.println("Skipping html creation since nothing seems to have changed since "
           + mergedHtmlsFile.getAbsolutePath());
     }

     return true;
   }

   private String getFileFromClassPath(String filename) {
     InputStream in = null;
     try {
       in = getClass().getClassLoader().getResourceAsStream(filename);
       try {
         if (in == null) {
           throw new RuntimeException("Cannot find file: " + filename);
         }
         StringWriter sw = new StringWriter();
         int ch;
         while ((ch = in.read()) != -1) {
           sw.write(ch);
         }
         return sw.toString();
       } finally {
         if (in != null) {
           in.close();
         }
       }
     } catch (IOException e) {
       throw new RuntimeException(e);
     }
   }

   private boolean mergeTopics(File mergedTopicsFile) {
     try {
       List args = new ArrayList();
       args.add("join"); // what to do
       args.add("topics"); // the outer element is <topics>
       args.add(mergedTopicsFile.getAbsolutePath());

       // For each of the htmlFileBases, try to find a file having that name to
       // merge into the big topics doc.
       //
       boolean foundAny = false;
       for (int i = 0, n = htmlFileBases.length; i < n; ++i) {
         String filebase = htmlFileBases[i];
         File fileToMerge = new File(outDir, filebase + ".topics.xml");
         if (fileToMerge.exists()) {
           foundAny = true;
           args.add(fileToMerge.getAbsolutePath());
         } else {
           err.println("Unable to find " + fileToMerge.getName());
         }
       }

       if (foundAny) {
         String[] argArray = (String[]) args.toArray(new String[0]);
         traceCommand("SplitterJoiner", argArray);
         SplitterJoiner.main(argArray);
       } else {
         err.println("No topics found");
         return false;
       }
     } catch (IOException e) {
       e.printStackTrace(err);
       return false;
     }
     return true;
   }

   /**
    * Runs the help process.
    */
   private boolean process() {
     if (fileType != null) {
       // Produce XML from JavaDoc.
       //
       String fileName = base + "." + fileType + ".xml";
       if (!runBooklet(new File(outDir, fileName))) {
         return false;
       }
     }

     // Process existing files to get them into topics format.
     // Done afterwards for convenience when debugging your doc.
     //
     transformExistingIntoTopicXml();

     if (generateHtml) {
       // Merge into HTML.
       if (!genHtml()) {
         return false;
       }
     }

     return true;
   }

   private boolean runBooklet(File bkoutFile) {
     // Write out the list of packages that can be found on the source path.
     out.println("Creating " + bkoutFile.getAbsolutePath());
     Set srcPackages = findSourcePackages();
     if (srcPackages.isEmpty()) {
       err.println("No input files found");
       return false;
     }

     List args = new ArrayList();

     // For now, harded-coded, but could be passed through
     args.add("-source");
     args.add("1.5");

     // The doclet
     args.add("-doclet");
     args.add(Booklet.class.getName());

     // Class path
     args.add("-classpath");
     args.add(flattenPath(classPath));

     // Source path
     args.add("-sourcepath");
     args.add(flattenPath(sourcePath));

     // Encoding is always UTF-8
     args.add("-encoding");
     args.add("UTF-8");

     // Overview file
     if (overviewFile != null) {
       args.add("-overview");
       args.add(overviewFile.getAbsolutePath());
     }

     // Output file
     args.add("-bkout");
     args.add(bkoutFile.getAbsolutePath());

     if (packages != null) {
       // Specify the packages to actually emit doc for
       StringBuffer bkdocpkg = new StringBuffer();
       for (int i = 0; i < packages.length; i++) {
         String pkg = packages[i];
         bkdocpkg.append(pkg);
         bkdocpkg.append(";");
       }
       args.add("-bkdocpkg");
       args.add(bkdocpkg.toString());
     }

     args.add("-breakiterator");

     // Specify the set of input packages (needed by JavaDoc)
     args.addAll(srcPackages);

     String[] argArray = (String[]) args.toArray(new String[0]);
     traceCommand("Booklet", argArray);
     Booklet.main(argArray);

     return bkoutFile.exists();
   }

   private boolean splitHtmls(File mergedHtmlsFile) {
     try {
       List args = new ArrayList();
       args.add("split"); // what to do
       args.add(mergedHtmlsFile.getAbsolutePath());
       String[] argArray = (String[]) args.toArray(new String[0]);
       traceCommand("SplitterJoiner", argArray);
       SplitterJoiner.main(argArray);
     } catch (IOException e) {
       e.printStackTrace(err);
       return false;
     }
     return true;
   }

   private void traceCommand(String cmd, String[] args) {
     out.print(cmd);
     for (int i = 0, n = args.length; i < n; ++i) {
       String arg = args[i];
       out.print(" ");
       out.print(arg);
     }
     out.println();
   }

   private void transform(String xslt, File inFile, File outFile, Map params) {
     Throwable caught = null;
     try {
       TransformerFactory transformerFactory = TransformerFactory.newInstance();
       StreamSource xsltSource = new StreamSource(new StringReader(xslt));
       Transformer transformer = transformerFactory.newTransformer(xsltSource);
       transformer.setOutputProperty(
           javax.xml.transform.OutputKeys.OMIT_XML_DECLARATION, "yes");
       transformer.setOutputProperty(javax.xml.transform.OutputKeys.INDENT,
           "yes");
       transformer.setOutputProperty(
           "{http://xml.apache.org/xslt}indent-amount", "4");

       if (params != null) {
         for (Iterator iter = params.entrySet().iterator(); iter.hasNext();) {
           Map.Entry entry = (Map.Entry) iter.next();
           transformer.setParameter((String) entry.getKey(), entry.getValue());
         }
       }

       FileOutputStream fos = new FileOutputStream(outFile);
       StreamResult result = new StreamResult(fos);
       StreamSource xmlSource = new StreamSource(new FileReader(inFile));
       transformer.transform(xmlSource, result);
       fos.close();
       return;
     } catch (TransformerConfigurationException e) {
       caught = e;
     } catch (TransformerException e) {
       caught = e;
     } catch (IOException e) {
       caught = e;
     }
     throw new RuntimeException("Unable to complete the xslt tranform", caught);
   }

   private void transformExistingIntoTopicXml() {
     File[] children = outDir.listFiles();
     if (children != null) {
       for (int i = 0, n = children.length; i < n; ++i) {
         File file = children[i];
         freshenIf(file);
       }
     }
   }

   private File tryReplaceSuffix(File file, String oldSuffix, String newSuffix) {
     String name = file.getName();
     if (name.endsWith(oldSuffix)) {
       String baseName = name.substring(0, name.length() - oldSuffix.length());
       return new File(file.getParent(), baseName + newSuffix);
     } else {
       return null;
     }
   }
 }
	/*
	* Copyright 2006 Google Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License"); you may not
	* use this file except in compliance with the License. You may obtain a copy of
	* the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
	* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
	* License for the specific language governing permissions and limitations under
	* the License.
	*/
	package com.google.doctool;

	import org.xml.sax.Attributes;
	import org.xml.sax.InputSource;
	import org.xml.sax.SAXException;
	import org.xml.sax.XMLReader;
	import org.xml.sax.helpers.DefaultHandler;

	import java.io.File;
	import java.io.FileInputStream;
	import java.io.FileOutputStream;
	import java.io.FileReader;
	import java.io.FileWriter;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.OutputStream;
	import java.io.PrintStream;
	import java.io.StringReader;
	import java.io.StringWriter;
	import java.util.ArrayList;
	import java.util.HashMap;
	import java.util.HashSet;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;
	import java.util.regex.Matcher;
	import java.util.regex.Pattern;

	import javax.xml.parsers.ParserConfigurationException;
	import javax.xml.parsers.SAXParser;
	import javax.xml.parsers.SAXParserFactory;
	import javax.xml.transform.Transformer;
	import javax.xml.transform.TransformerConfigurationException;
	import javax.xml.transform.TransformerException;
	import javax.xml.transform.TransformerFactory;
	import javax.xml.transform.stream.StreamResult;
	import javax.xml.transform.stream.StreamSource;

	/**
	* Orchestrates the behavior of {@link Booklet}, {@link SplitterJoiner} and
	* other tools to create user documentation and API documentation.
	*/
	public class DocTool {

	private class ImageCopier extends DefaultHandler {

	private final File htmlDir;

	private ImageCopier(File htmlDir) {
	this.htmlDir = htmlDir;
	}

	public void startElement(String uri, String localName, String qName,
	Attributes attributes) throws SAXException {
	if (qName.equalsIgnoreCase("img")) {
	String imgSrc = attributes.getValue("src");
	if (imgSrc != null) {
	boolean found = false;
	for (int i = 0, n = imagePath.length; i < n; ++i) {
	File dir = imagePath[i];
	File inFile = new File(dir, imgSrc);
	if (inFile.exists()) {
	// Copy it over.
	//
	found = true;
	File outFile = new File(htmlDir, imgSrc);

	if (outFile.exists()) {
	if (outFile.lastModified() > inFile.lastModified()) {
	// Already up to date.
	break;
	}
	} else {
	File outFileDir = outFile.getParentFile();
	if (!outFileDir.exists() && !outFileDir.mkdirs()) {
	err.println("Unable to create image output dir " + outFileDir);
	break;
	}
	}
	if (!copyFile(inFile, outFile)) {
	err.println("Unable to copy image file " + outFile);
	}
	}
	}
	if (!found) {
	err.println("Unable to find image " + imgSrc);
	}
	}
	}
	}
	}

	private static final Pattern IN_XML_FILENAME = Pattern.compile(
	"(.+)\\.([^\\.]+)\\.xml", Pattern.CASE_INSENSITIVE);

	public static void main(String[] args) {
	DocToolFactory factory = new DocToolFactory();
	String arg;
	String pathSep = System.getProperty("path.separator");
	for (int i = 0, n = args.length; i < n; ++i) {
	if (tryParseFlag(args, i, "-help")) {
	printHelp();
	return;
	} else if (null != (arg = tryParseArg(args, i, "-out"))) {
	++i;
	factory.setOutDir(arg);
	} else if (null != (arg = tryParseArg(args, i, "-html"))) {
	++i;
	factory.setGenerateHtml(true);
	factory.setTitle(arg);

	// Slurp every arg not prefixed with "-".
	for (; i + 1 < n && !args[i + 1].startsWith("-"); ++i) {
	factory.addHtmlFileBase(args[i + 1]);
	}
	} else if (null != (arg = tryParseArg(args, i, "-overview"))) {
	++i;
	factory.setOverviewFile(arg);
	} else if (null != (arg = tryParseArg(args, i, "-sourcepath"))) {
	++i;
	String[] entries = arg.split("\\" + pathSep);
	for (int entryIndex = 0; entryIndex < entries.length; entryIndex++) {
	factory.addToSourcePath(entries[entryIndex]);
	}
	} else if (null != (arg = tryParseArg(args, i, "-classpath"))) {
	++i;
	String[] entries = arg.split("\\" + pathSep);
	for (int entryIndex = 0; entryIndex < entries.length; entryIndex++) {
	factory.addToClassPath(entries[entryIndex]);
	}
	} else if (null != (arg = tryParseArg(args, i, "-packages"))) {
	++i;
	String[] entries = arg.split("\\" + pathSep);
	for (int entryIndex = 0; entryIndex < entries.length; entryIndex++) {
	factory.addToPackages(entries[entryIndex]);
	}
	} else if (null != (arg = tryParseArg(args, i, "-imagepath"))) {
	++i;
	String[] entries = arg.split("\\" + pathSep);
	for (int entryIndex = 0; entryIndex < entries.length; entryIndex++) {
	factory.addToImagePath(entries[entryIndex]);
	}
	} else {
	if (factory.getFileType() == null) {
	factory.setFileType(args[i]);
	} else {
	factory.setFileBase(args[i]);
	}
	}
	}

	DocTool docTool = factory.create(System.out, System.err);
	if (docTool != null) {
	docTool.process();
	}
	}

	public static boolean recursiveDelete(File file) {
	if (file.isDirectory()) {
	File[] children = file.listFiles();
	if (children != null) {
	for (int i = 0; i < children.length; i++) {
	if (!recursiveDelete(children[i])) {
	return false;
	}
	}
	}
	}
	if (!file.delete()) {
	System.err.println("Unable to delete " + file.getAbsolutePath());
	return false;
	}
	return true;
	}

	private static void printHelp() {
	String s = "";
	s += "DocTool (filetype filebase)? [docset-creation-options] [html-creation-options]\n";
	s += " Creates structured javadoc xml output from Java source and/or\n";
	s += " a table of contents and a set of cross-linked html files.\n";
	s += " Specifying filebase/filetype produces output file \"filebase.filetype.xml\".\n";
	s += " Specifying -html produces output files in ${out}/html.\n";
	s += "\n";
	s += "[docset-creation-options] are\n";
	s += " -out\n";
	s += " The output directory\n";
	s += " -overview\n";
	s += " The overview html file for this doc set\n";
	s += " -sourcepath path\n";
	s += " The path to find Java source for this doc set\n";
	s += " -classpath path\n";
	s += " The path to find imported classes for this doc set\n";
	s += " -packages package-names\n";
	s += " The command-separated list of package names to include in this doc set\n";
	s += "\n";
	s += "[html-creation-options] are\n";
	s += " -html title filebase+\n";
	s += " Causes topics in the named filebase(s) to be merged and converted into html\n";
	s += " -imagepath\n";
	s += " The semicolon-separated path to find images for html\n";
	System.out.println(s);
	}

	/**
	* Parse a flag with a argument.
	*/
	private static String tryParseArg(String[] args, int i, String name) {
	if (i < args.length) {
	if (args[i].equals(name)) {
	if (i + 1 < args.length) {
	String arg = args[i + 1];
	if (arg.startsWith("-")) {
	System.out.println("Warning: arg to " + name
	+ " looks more like a flag: " + arg);
	}
	return arg;
	} else {
	throw new IllegalArgumentException("Expecting an argument after "
	+ name);
	}
	}
	}
	return null;
	}

	/**
	* Parse just a flag with no subsequent argument.
	*/
	private static boolean tryParseFlag(String[] args, int i, String name) {
	if (i < args.length) {
	if (args[i].equals(name)) {
	return true;
	}
	}
	return false;
	}

	private final File[] classPath;

	private final String[] packages;

	private final PrintStream err;

	private final String base;

	private final String fileType;

	private final boolean generateHtml;

	private final String[] htmlFileBases;

	private final File[] imagePath;

	private final PrintStream out;

	private final File outDir;

	private final File overviewFile;

	private final File[] sourcePath;

	private final String title;

	DocTool(PrintStream out, PrintStream err, File outDir, boolean generateHtml,
	String title, String[] htmlFileBases, String fileType, String fileBase,
	File overviewFile, File[] sourcePath, File[] classPath,
	String[] packages, File[] imagePath) {
	this.out = out;
	this.err = err;
	this.outDir = outDir;
	this.generateHtml = generateHtml;
	this.base = fileBase;
	this.fileType = fileType;
	this.overviewFile = overviewFile;
	this.sourcePath = sourcePath;
	this.classPath = classPath;
	this.packages = packages;
	this.imagePath = imagePath;
	this.title = title;
	this.htmlFileBases = htmlFileBases.clone();
	}

	public boolean copyFile(File in, File out) {
	FileInputStream fis = null;
	FileOutputStream fos = null;
	try {
	fis = new FileInputStream(in);
	fos = new FileOutputStream(out);
	byte[] buf = new byte[4096];
	int i = 0;
	while ((i = fis.read(buf)) != -1) {
	fos.write(buf, 0, i);
	}
	return true;
	} catch (IOException e) {
	return false;
	} finally {
	close(fis);
	close(fos);
	}
	}

	private void close(InputStream is) {
	if (is != null) {
	try {
	is.close();
	} catch (IOException e) {
	e.printStackTrace(err);
	}
	}
	}

	private void close(OutputStream os) {
	if (os != null) {
	try {
	os.close();
	} catch (IOException e) {
	e.printStackTrace(err);
	}
	}
	}

	private boolean copyImages(File htmlDir, File mergedTopicsFile) {
	FileReader fileReader = null;
	Throwable caught = null;
	try {
	fileReader = new FileReader(mergedTopicsFile);
	SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
	InputSource inputSource = new InputSource(fileReader);
	XMLReader xmlReader = parser.getXMLReader();
	xmlReader.setContentHandler(new ImageCopier(htmlDir));
	xmlReader.parse(inputSource);
	return true;
	} catch (SAXException e) {
	caught = e;
	Exception inner = e.getException();
	if (inner != null) {
	caught = inner;
	}
	} catch (ParserConfigurationException e) {
	caught = e;
	} catch (IOException e) {
	caught = e;
	} finally {
	try {
	if (fileReader != null) {
	fileReader.close();
	}
	} catch (IOException e) {
	e.printStackTrace(err);
	}
	}
	caught.printStackTrace(err);
	return false;
	}

	private Set findSourcePackages() {
	Set results = new HashSet();
	for (int i = 0, n = sourcePath.length; i < n; ++i) {
	File srcDir = sourcePath[i];
	findSourcePackages(results, srcDir, "");
	}
	return results;
	}

	private void findSourcePackages(Set results, File dir, String parentPackage) {
	File[] children = dir.listFiles();
	if (children != null) {
	for (int i = 0, n = children.length; i < n; ++i) {
	File child = children[i];
	String childName = parentPackage
	+ (parentPackage.length() > 0 ? "." : "") + child.getName();
	if (child.isDirectory()) {
	// Recurse
	findSourcePackages(results, child, childName);
	} else if (child.getName().endsWith(".java")) {
	// Only include this dir as a result if there's at least one java file
	results.add(parentPackage);
	}
	}
	}
	}

	private String flattenPath(File[] entries) {
	String pathSep = System.getProperty("path.separator");
	String path = "";
	for (int i = 0, n = entries.length; i < n; ++i) {
	File entry = entries[i];
	if (i > 0) {
	path += pathSep;
	}
	path += entry.getAbsolutePath();
	}
	return path;
	}

	private void freshenIf(File file) {
	if (!file.isFile()) {
	return;
	}

	String name = file.getName();
	Matcher matcher = IN_XML_FILENAME.matcher(name);
	if (matcher.matches()) {
	String suffix = "." + matcher.group(2) + ".xml";
	File topicFile = tryReplaceSuffix(file, suffix, ".topics.xml");
	if (topicFile != null) {
	if (file.lastModified() > topicFile.lastModified()) {
	String xsltFileName = matcher.group(2) + "-" + "topics.xslt";
	String xslt = getFileFromClassPath(xsltFileName); // yucky slow
	out.println(file + " -> " + topicFile);
	transform(xslt, file, topicFile, null);
	}
	}
	}
	}

	private boolean genHtml() {
	// Make sure the html directory exists.
	//
	File htmlDir = new File(outDir, "html");
	if (!htmlDir.exists() && !htmlDir.mkdirs()) {
	err.println("Cannot create html output directory "
	+ htmlDir.getAbsolutePath());
	return false;
	}

	// Merge all *.topics.xml into one topics.xml file.
	//
	File mergedTopicsFile = new File(outDir, "topics.xml");
	if (!mergeTopics(mergedTopicsFile)) {
	return false;
	}

	// Parse it all to find the images and copy them over.
	//
	copyImages(htmlDir, mergedTopicsFile);

	// Transform to merged topics into merged htmls.
	//
	File mergedHtmlsFile = new File(htmlDir, "topics.htmls");
	long lastModifiedHtmls = mergedHtmlsFile.lastModified();
	long lastModifiedTopics = mergedTopicsFile.lastModified();
	if (!mergedHtmlsFile.exists() \|\| lastModifiedHtmls < lastModifiedTopics) {
	String xsltHtmls = getFileFromClassPath("topics-htmls.xslt");

	Map params = new HashMap();
	params.put("title", title);

	transform(xsltHtmls, mergedTopicsFile, mergedHtmlsFile, params);

	// Split the merged htmls into many html files.
	//
	if (!splitHtmls(mergedHtmlsFile)) {
	return false;
	}

	// Create a table of contents.
	//
	File tocFile = new File(htmlDir, "contents.html");
	String xsltToc = getFileFromClassPath("topics-toc.xslt");
	transform(xsltToc, mergedTopicsFile, tocFile, params);

	// Copy the CSS file over.
	//
	String css = getFileFromClassPath("doc.css");
	try {
	FileWriter cssWriter = new FileWriter(new File(htmlDir, "doc.css"));
	cssWriter.write(css);
	cssWriter.close();
	} catch (IOException e) {
	e.printStackTrace(err);
	}
	} else {
	out.println("Skipping html creation since nothing seems to have changed since "
	+ mergedHtmlsFile.getAbsolutePath());
	}

	return true;
	}

	private String getFileFromClassPath(String filename) {
	InputStream in = null;
	try {
	in = getClass().getClassLoader().getResourceAsStream(filename);
	try {
	if (in == null) {
	throw new RuntimeException("Cannot find file: " + filename);
	}
	StringWriter sw = new StringWriter();
	int ch;
	while ((ch = in.read()) != -1) {
	sw.write(ch);
	}
	return sw.toString();
	} finally {
	if (in != null) {
	in.close();
	}
	}
	} catch (IOException e) {
	throw new RuntimeException(e);
	}
	}

	private boolean mergeTopics(File mergedTopicsFile) {
	try {
	List args = new ArrayList();
	args.add("join"); // what to do
	args.add("topics"); // the outer element is <topics>
	args.add(mergedTopicsFile.getAbsolutePath());

	// For each of the htmlFileBases, try to find a file having that name to
	// merge into the big topics doc.
	//
	boolean foundAny = false;
	for (int i = 0, n = htmlFileBases.length; i < n; ++i) {
	String filebase = htmlFileBases[i];
	File fileToMerge = new File(outDir, filebase + ".topics.xml");
	if (fileToMerge.exists()) {
	foundAny = true;
	args.add(fileToMerge.getAbsolutePath());
	} else {
	err.println("Unable to find " + fileToMerge.getName());
	}
	}

	if (foundAny) {
	String[] argArray = (String[]) args.toArray(new String[0]);
	traceCommand("SplitterJoiner", argArray);
	SplitterJoiner.main(argArray);
	} else {
	err.println("No topics found");
	return false;
	}
	} catch (IOException e) {
	e.printStackTrace(err);
	return false;
	}
	return true;
	}

	/**
	* Runs the help process.
	*/
	private boolean process() {
	if (fileType != null) {
	// Produce XML from JavaDoc.
	//
	String fileName = base + "." + fileType + ".xml";
	if (!runBooklet(new File(outDir, fileName))) {
	return false;
	}
	}

	// Process existing files to get them into topics format.
	// Done afterwards for convenience when debugging your doc.
	//
	transformExistingIntoTopicXml();

	if (generateHtml) {
	// Merge into HTML.
	if (!genHtml()) {
	return false;
	}
	}

	return true;
	}

	private boolean runBooklet(File bkoutFile) {
	// Write out the list of packages that can be found on the source path.
	out.println("Creating " + bkoutFile.getAbsolutePath());
	Set srcPackages = findSourcePackages();
	if (srcPackages.isEmpty()) {
	err.println("No input files found");
	return false;
	}

	List args = new ArrayList();

	// For now, harded-coded, but could be passed through
	args.add("-source");
	args.add("1.5");

	// The doclet
	args.add("-doclet");
	args.add(Booklet.class.getName());

	// Class path
	args.add("-classpath");
	args.add(flattenPath(classPath));

	// Source path
	args.add("-sourcepath");
	args.add(flattenPath(sourcePath));

	// Encoding is always UTF-8
	args.add("-encoding");
	args.add("UTF-8");

	// Overview file
	if (overviewFile != null) {
	args.add("-overview");
	args.add(overviewFile.getAbsolutePath());
	}

	// Output file
	args.add("-bkout");
	args.add(bkoutFile.getAbsolutePath());

	if (packages != null) {
	// Specify the packages to actually emit doc for
	StringBuffer bkdocpkg = new StringBuffer();
	for (int i = 0; i < packages.length; i++) {
	String pkg = packages[i];
	bkdocpkg.append(pkg);
	bkdocpkg.append(";");
	}
	args.add("-bkdocpkg");
	args.add(bkdocpkg.toString());
	}

	args.add("-breakiterator");

	// Specify the set of input packages (needed by JavaDoc)
	args.addAll(srcPackages);

	String[] argArray = (String[]) args.toArray(new String[0]);
	traceCommand("Booklet", argArray);
	Booklet.main(argArray);

	return bkoutFile.exists();
	}

	private boolean splitHtmls(File mergedHtmlsFile) {
	try {
	List args = new ArrayList();
	args.add("split"); // what to do
	args.add(mergedHtmlsFile.getAbsolutePath());
	String[] argArray = (String[]) args.toArray(new String[0]);
	traceCommand("SplitterJoiner", argArray);
	SplitterJoiner.main(argArray);
	} catch (IOException e) {
	e.printStackTrace(err);
	return false;
	}
	return true;
	}

	private void traceCommand(String cmd, String[] args) {
	out.print(cmd);
	for (int i = 0, n = args.length; i < n; ++i) {
	String arg = args[i];
	out.print(" ");
	out.print(arg);
	}
	out.println();
	}

	private void transform(String xslt, File inFile, File outFile, Map params) {
	Throwable caught = null;
	try {
	TransformerFactory transformerFactory = TransformerFactory.newInstance();
	StreamSource xsltSource = new StreamSource(new StringReader(xslt));
	Transformer transformer = transformerFactory.newTransformer(xsltSource);
	transformer.setOutputProperty(
	javax.xml.transform.OutputKeys.OMIT_XML_DECLARATION, "yes");
	transformer.setOutputProperty(javax.xml.transform.OutputKeys.INDENT,
	"yes");
	transformer.setOutputProperty(
	"{http://xml.apache.org/xslt}indent-amount", "4");

	if (params != null) {
	for (Iterator iter = params.entrySet().iterator(); iter.hasNext();) {
	Map.Entry entry = (Map.Entry) iter.next();
	transformer.setParameter((String) entry.getKey(), entry.getValue());
	}
	}

	FileOutputStream fos = new FileOutputStream(outFile);
	StreamResult result = new StreamResult(fos);
	StreamSource xmlSource = new StreamSource(new FileReader(inFile));
	transformer.transform(xmlSource, result);
	fos.close();
	return;
	} catch (TransformerConfigurationException e) {
	caught = e;
	} catch (TransformerException e) {
	caught = e;
	} catch (IOException e) {
	caught = e;
	}
	throw new RuntimeException("Unable to complete the xslt tranform", caught);
	}

	private void transformExistingIntoTopicXml() {
	File[] children = outDir.listFiles();
	if (children != null) {
	for (int i = 0, n = children.length; i < n; ++i) {
	File file = children[i];
	freshenIf(file);
	}
	}
	}

	private File tryReplaceSuffix(File file, String oldSuffix, String newSuffix) {
	String name = file.getName();
	if (name.endsWith(oldSuffix)) {
	String baseName = name.substring(0, name.length() - oldSuffix.length());
	return new File(file.getParent(), baseName + newSuffix);
	} else {
	return null;
	}
	}
	}