org.codehaus.mojo.javacc.JJDocMojo Maven / Gradle / Ivy
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Maven 3 Plugin for processing JavaCC grammar files.
package org.codehaus.mojo.javacc;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
import java.io.File;
import java.util.Arrays;
import java.util.Comparator;
import java.util.LinkedHashSet;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.Set;
import org.apache.maven.doxia.sink.Sink;
import org.apache.maven.doxia.siterenderer.Renderer;
import org.apache.maven.project.MavenProject;
import org.apache.maven.reporting.AbstractMavenReport;
import org.apache.maven.reporting.MavenReportException;
/**
* JJDoc takes a JavaCC
* parser specification and produces documentation for the BNF grammar. This
* mojo will search the source directory for all *.jj files and run
* JJDoc once for each file it finds. Each of these output files, along with an
* index.html file will be placed in the site directory (
* target/site/jjdoc), and a link will be created in the "Project
* Reports" menu of the generated site.
*
* @goal jjdoc
* @execute phase=generate-sources
* @since 2.3
* @author Paul Gier
* @version $Id: JJDocMojo.java 10603 2009-09-06 15:05:08Z bentmann $
* @see JJDoc
* Documentation
*/
public class JJDocMojo extends AbstractMavenReport
{
// ----------------------------------------------------------------------
// Mojo Parameters
// ----------------------------------------------------------------------
/**
* The current Maven project.
*
* @parameter property=project
* @required
* @readonly
*/
private MavenProject project;
/**
* The site renderer.
*
* @component
*/
private Renderer siteRenderer;
/**
* The directories where the JavaCC grammar files (*.jj) are
* located. By default, the directories
* ${basedir}/src/main/javacc,
* ${project.build.directory}/generated-sources/jjtree and
* ${project.build.directory}/generated-sources/jtb are scanned
* for grammar files to document.
*
* @parameter
*/
private File [] sourceDirectories;
/**
* The default source directory for hand-crafted grammar files.
*
* @parameter default-value="${basedir}/src/main/javacc"
* @readonly
*/
private File defaultGrammarDirectoryJavaCC;
/**
* The default source directory for grammar files generated by JJTree.
*
* @parameter
* default-value="${project.build.directory}/generated-sources/jjtree"
* @readonly
*/
private File defaultGrammarDirectoryJJTree;
/**
* The default source directory for grammar files generated by JTB.
*
* @parameter default-value="${project.build.directory}/generated-sources/jtb"
* @readonly
*/
private File defaultGrammarDirectoryJTB;
/**
* The relative path of the JJDoc reports in the output directory. This path
* will be appended to the output directory.
*
* @parameter default-value="jjdoc";
*/
private String jjdocDirectory;
/**
* The destination directory where JJDoc saves the generated documentation
* files. Note that this parameter is only relevant if the goal is run from
* the command line or from the default build lifecycle. If the goal is run
* indirectly as part of a site generation, the output directory configured in
* the Maven Site Plugin is used instead.
*
* @parameter property=outputDirectory
* default-value="${project.reporting.outputDirectory}"
*/
private File outputDirectory;
/**
* The file encoding to use for reading the grammar files.
*
* @parameter property=grammarEncoding
* default-value="${project.build.sourceEncoding}"
* @since 2.6
*/
private String grammarEncoding;
/**
* The hypertext reference to an optional CSS file for the generated HTML
* documents. If specified, this CSS file will be included via a
* <link> element in the HTML documents. Otherwise, the
* default style will be used.
*
* @parameter property=cssHref
* @since 2.5
*/
private String cssHref;
/**
* A flag to specify the output format for the generated documentation. If set
* to true, JJDoc will generate a plain text description of the
* BNF. Some formatting is done via tab characters, but the intention is to
* leave it as plain as possible. Specifying false causes JJDoc
* to generate a hyperlinked HTML document unless the parameter {@link #bnf}
* has been set to true. Default value is false.
*
* @parameter property=text
*/
private Boolean text;
/**
* A flag whether to generate a plain text document with the unformatted BNF.
* Note that setting this option to true is only effective if the
* parameter {@link #text} is false. Default value is
* false.
*
* @parameter property=bnf
* @since 2.6
*/
private Boolean bnf;
/**
* This option controls the structure of the generated HTML output. If set to
* true, a single HTML table for the entire BNF is generated.
* Setting it to false will produce one table for every
* production in the grammar.
*
* @parameter property=oneTable default-value=true
*/
private boolean oneTable;
/**
* Get the maven project.
*
* @see org.apache.maven.reporting.AbstractMavenReport#getProject()
* @return The current Maven project.
*/
@Override
protected MavenProject getProject ()
{
return this.project;
}
/**
* Get the site renderer.
*
* @see org.apache.maven.reporting.AbstractMavenReport#getSiteRenderer()
* @return The site renderer.
*/
@Override
protected Renderer getSiteRenderer ()
{
return this.siteRenderer;
}
/**
* Get the output directory of the report if run directly from the command
* line.
*
* @see org.apache.maven.reporting.AbstractMavenReport#getOutputDirectory()
* @return The report output directory.
*/
@Override
protected String getOutputDirectory ()
{
return this.outputDirectory.getAbsolutePath ();
}
/**
* Get the output directory of the JJDoc files, i.e. the sub directory in the
* report output directory as specified by the {@link #jjdocDirectory}
* parameter.
*
* @return The report output directory of the JJDoc files.
*/
private File getJJDocOutputDirectory ()
{
return new File (getReportOutputDirectory (), this.jjdocDirectory);
}
/**
* Get the source directories that should be scanned for grammar files.
*
* @return The source directories that should be scanned for grammar files,
* never null.
*/
private File [] getSourceDirectories ()
{
final Set directories = new LinkedHashSet ();
if (this.sourceDirectories != null && this.sourceDirectories.length > 0)
{
directories.addAll (Arrays.asList (this.sourceDirectories));
}
else
{
if (this.defaultGrammarDirectoryJavaCC != null)
{
directories.add (this.defaultGrammarDirectoryJavaCC);
}
if (this.defaultGrammarDirectoryJJTree != null)
{
directories.add (this.defaultGrammarDirectoryJJTree);
}
if (this.defaultGrammarDirectoryJTB != null)
{
directories.add (this.defaultGrammarDirectoryJTB);
}
}
return directories.toArray (new File [directories.size ()]);
}
// ----------------------------------------------------------------------
// public methods
// ----------------------------------------------------------------------
/**
* @see org.apache.maven.reporting.MavenReport#getName(java.util.Locale)
* @param locale
* The locale to use for this report.
* @return The name of this report.
*/
public String getName (final Locale locale)
{
return getBundle (locale).getString ("report.jjdoc.name");
}
/**
* @see org.apache.maven.reporting.MavenReport#getDescription(java.util.Locale)
* @param locale
* The locale to use for this report.
* @return The description of this report.
*/
public String getDescription (final Locale locale)
{
return getBundle (locale).getString ("report.jjdoc.short.description");
}
/**
* @see org.apache.maven.reporting.MavenReport#getOutputName()
* @return The name of the main report file.
*/
public String getOutputName ()
{
return this.jjdocDirectory + "/index";
}
/**
* @see org.apache.maven.reporting.MavenReport#canGenerateReport()
* @return true if the configured source directories are not
* empty, false otherwise.
*/
@Override
public boolean canGenerateReport ()
{
final File sourceDirs[] = getSourceDirectories ();
for (final File sourceDir : sourceDirs)
{
final String [] files = sourceDir.list ();
if (files != null && files.length > 0)
{
return true;
}
}
return false;
}
/**
* Run the actual report.
*
* @param locale
* The locale to use for this report.
* @throws MavenReportException
* If the report generation failed.
*/
@Override
public void executeReport (final Locale locale) throws MavenReportException
{
final Sink sink = getSink ();
createReportHeader (getBundle (locale), sink);
final File [] sourceDirs = getSourceDirectories ();
for (final File sourceDir : sourceDirs)
{
final GrammarInfo [] grammarInfos = scanForGrammars (sourceDir);
if (grammarInfos == null)
{
getLog ().debug ("Skipping non-existing source directory: " + sourceDir);
}
else
{
Arrays.sort (grammarInfos, GrammarInfoComparator.getInstance ());
for (final GrammarInfo grammarInfo : grammarInfos)
{
final File grammarFile = grammarInfo.getGrammarFile ();
String relativeOutputFileName = grammarInfo.getRelativeGrammarFile ();
relativeOutputFileName = relativeOutputFileName.replaceAll ("(?i)\\.(jj|jjt|jtb)$", getOutputFileExtension ());
final File jjdocOutputFile = new File (getJJDocOutputDirectory (), relativeOutputFileName);
final JJDoc jjdoc = newJJDoc ();
jjdoc.setInputFile (grammarFile);
jjdoc.setOutputFile (jjdocOutputFile);
try
{
jjdoc.run ();
}
catch (final Exception e)
{
throw new MavenReportException ("Failed to create BNF documentation: " + grammarFile, e);
}
createReportLink (sink, sourceDir, grammarFile, relativeOutputFileName);
}
}
}
createReportFooter (sink);
sink.flush ();
sink.close ();
}
/**
* The JJDoc output file will have a .html or .txt
* extension depending on the value of the parameters {@link #text} and
* {@link #bnf}.
*
* @return The file extension (including the leading period) to be used for
* the JJDoc output files.
*/
private String getOutputFileExtension ()
{
if (Boolean.TRUE.equals (this.text) || Boolean.TRUE.equals (this.bnf))
{
return ".txt";
}
else
{
return ".html";
}
}
/**
* Create the header and title for the HTML report page.
*
* @param bundle
* The resource bundle with the text.
* @param sink
* The sink for writing to the main report file.
*/
private void createReportHeader (final ResourceBundle bundle, final Sink sink)
{
sink.head ();
sink.title ();
sink.text (bundle.getString ("report.jjdoc.title"));
sink.title_ ();
sink.head_ ();
sink.body ();
sink.section1 ();
sink.sectionTitle1 ();
sink.text (bundle.getString ("report.jjdoc.title"));
sink.sectionTitle1_ ();
sink.text (bundle.getString ("report.jjdoc.description"));
sink.section1_ ();
sink.lineBreak ();
sink.table ();
sink.tableRow ();
sink.tableHeaderCell ();
sink.text (bundle.getString ("report.jjdoc.table.heading"));
sink.tableHeaderCell_ ();
sink.tableRow_ ();
}
/**
* Create a table row containing a link to the JJDoc report for a grammar
* file.
*
* @param sink
* The sink to write the report
* @param sourceDirectory
* The source directory of the grammar file.
* @param grammarFile
* The JavaCC grammar file.
* @param linkPath
* The path to the JJDoc output.
*/
private void createReportLink (final Sink sink, final File sourceDirectory, final File grammarFile, String linkPath)
{
sink.tableRow ();
sink.tableCell ();
if (linkPath.startsWith ("/"))
{
linkPath = linkPath.substring (1);
}
sink.link (linkPath);
String grammarFileRelativePath = sourceDirectory.toURI ().relativize (grammarFile.toURI ()).toString ();
if (grammarFileRelativePath.startsWith ("/"))
{
grammarFileRelativePath = grammarFileRelativePath.substring (1);
}
sink.text (grammarFileRelativePath);
sink.link_ ();
sink.tableCell_ ();
sink.tableRow_ ();
}
/**
* Create the HTML footer for the report page.
*
* @param sink
* The sink to write the HTML report page.
*/
private void createReportFooter (final Sink sink)
{
sink.table_ ();
sink.body_ ();
}
/**
* Creates a new facade to invoke JJDoc. Most options for the invocation are
* derived from the current values of the corresponding mojo parameters. The
* caller is responsible to set the input file and output file on the returned
* facade.
*
* @return The facade for the tool invocation, never null.
*/
private JJDoc newJJDoc ()
{
final JJDoc jjdoc = new JJDoc ();
jjdoc.setLog (getLog ());
jjdoc.setGrammarEncoding (this.grammarEncoding);
jjdoc.setCssHref (this.cssHref);
jjdoc.setText (this.text);
jjdoc.setBnf (this.bnf);
jjdoc.setOneTable (Boolean.valueOf (this.oneTable));
return jjdoc;
}
/**
* Searches the specified source directory to find grammar files that can be
* documented.
*
* @param sourceDirectory
* The source directory to scan for grammar files.
* @return An array of grammar infos describing the found grammar files or
* null if the source directory does not exist.
* @throws MavenReportException
* If there is a problem while scanning for .jj files.
*/
private GrammarInfo [] scanForGrammars (final File sourceDirectory) throws MavenReportException
{
if (!sourceDirectory.isDirectory ())
{
return null;
}
GrammarInfo [] grammarInfos;
getLog ().debug ("Scanning for grammars: " + sourceDirectory);
try
{
final String [] includes = { "**/*.jj", "**/*.JJ", "**/*.jjt", "**/*.JJT", "**/*.jtb", "**/*.JTB" };
final GrammarDirectoryScanner scanner = new GrammarDirectoryScanner ();
scanner.setSourceDirectory (sourceDirectory);
scanner.setIncludes (includes);
scanner.scan ();
grammarInfos = scanner.getIncludedGrammars ();
}
catch (final Exception e)
{
throw new MavenReportException ("Failed to scan for grammars: " + sourceDirectory, e);
}
getLog ().debug ("Found grammars: " + Arrays.asList (grammarInfos));
return grammarInfos;
}
/**
* Get the resource bundle for the report text.
*
* @param locale
* The locale to use for this report.
* @return The resource bundle.
*/
private ResourceBundle getBundle (final Locale locale)
{
return ResourceBundle.getBundle ("jjdoc-report", locale, getClass ().getClassLoader ());
}
/**
* Compares grammar infos using their relative grammar file paths as the sort
* key.
*/
private static class GrammarInfoComparator implements Comparator
{
/**
* The singleton instance of this comparator.
*/
private static final GrammarInfoComparator INSTANCE = new GrammarInfoComparator ();
/**
* Gets the singleton instance of this class.
*
* @return The singleton instance of this class.
*/
public static GrammarInfoComparator getInstance ()
{
return INSTANCE;
}
/**
* Compares the path of two grammar files lexicographically.
*
* @param o1
* The first grammar info.
* @param o2
* The second grammar info.
* @return A negative integer if the first grammar is considered "smaller",
* a positive integer if it is considered "greater" and zero
* otherwise.
*/
public int compare (final Object o1, final Object o2)
{
int rel;
final GrammarInfo info1 = (GrammarInfo) o1;
final String [] paths1 = info1.getRelativeGrammarFile ().split ("\\" + File.separatorChar);
final GrammarInfo info2 = (GrammarInfo) o2;
final String [] paths2 = info2.getRelativeGrammarFile ().split ("\\" + File.separatorChar);
final int dirs = Math.min (paths1.length, paths2.length) - 1;
for (int i = 0; i < dirs; i++)
{
rel = paths1[i].compareToIgnoreCase (paths2[i]);
if (rel != 0)
{
return rel;
}
}
rel = paths1.length - paths2.length;
if (rel != 0)
{
return rel;
}
return paths1[paths1.length - 1].compareToIgnoreCase (paths2[paths1.length - 1]);
}
}
}