ph-javacc-maven-plugin

An updated version of the javacc-maven-plugin. Originally it was JavaCC 6.1.3, than updated to JavaCC 7.0 but in the meantime the underlying code is the ParserGeneratorCC project which is a fork of JavaCC 7.0.3 but with slightly improved code and output quality. The main difference is the removed code compatibility for generating code below Java 1.5 - respective options where removed.
For the rest, the parameters etc. where basically not touched, so it should be a drop-in replacement for the old javacc-maven-plugin 2.6. It requires Java 1.8 or higher and Apache Maven 3.x or higher.

It is licensed under the Apache 2 license.

I'm using it e.g. in ph-css for CSS parsing.

Upgrading from the original plugin

The following list is member-gathered when they update to this plugin and is not comprehensive

• Requires at least Java 1.5
• use the constructor with "InputStream, Charset", the one with only "InputStream" throws an Exception
• change TokenMgrError into TokenMgrException

Maven usage

Example with 3 executions (two javacc and one jjtree-javacc), try with mvn clean process-resources:

    <build>
      ...
      <plugin>
        <groupId>com.helger.maven</groupId>
        <artifactId>ph-javacc-maven-plugin</artifactId>
        <version>4.1.4</version>
        <executions>
          <execution>
            <id>jjc1</id>
            <phase>generate-sources</phase>
            <goals>
              <goal>javacc</goal>
            </goals>
            <configuration>
              <jdkVersion>1.5</jdkVersion>
              <javadocFriendlyComments>true</javadocFriendlyComments>
              <packageName>org.javacc.parser</packageName>
              <sourceDirectory>src/main/java/org/javacc/parser</sourceDirectory>
              <outputDirectory>${project.build.directory}/generated-sources/javacc1</outputDirectory>
            </configuration>
          </execution>
          <execution>
            <id>jjt2</id>
            <phase>generate-sources</phase>
            <goals>
              <goal>javacc</goal>
            </goals>
            <configuration>
              <jdkVersion>1.5</jdkVersion>
              <javadocFriendlyComments>true</javadocFriendlyComments>
              <packageName>org.javacc.utils</packageName>
              <sourceDirectory>src/main/java/org/javacc/utils</sourceDirectory>
              <outputDirectory>${project.build.directory}/generated-sources/javacc2</outputDirectory>
            </configuration>
          </execution>
          <execution>
            <id>jjt1</id>
            <phase>generate-sources</phase>
            <goals>
              <goal>jjtree-javacc</goal>
            </goals>
            <configuration>
              <jdkVersion>1.5</jdkVersion>
              <javadocFriendlyComments>true</javadocFriendlyComments>
              <packageName>org.javacc.parser</packageName>
              <sourceDirectory>src/main/java/org/javacc/jjtree</sourceDirectory>
              <excludes>
                <exclude>**/parser/**</exclude>
              </excludes>
              <outputDirectory>${project.build.directory}/generated-sources/jjtree1</outputDirectory>
            </configuration>
          </execution>
        </executions>
      </plugin>
      ...
    </build>

Supported goals with the respective parameters are:

• javacc - parses a JavaCC grammar file (*.jj) and transforms it to Java source files. Detailed information about the JavaCC options can be found on the JavaCC website
  • File sourceDirectory - The directory where the JavaCC grammar files (*.jj) are located. Defaults to ${basedir}/src/main/javacc.
  • File outputDirectory - The directory where the parser files generated by JavaCC will be stored. The directory will be registered as a compile source root of the project such that the generated files will participate in later build phases like compiling and packaging. Defaults to ${project.build.directory}/generated-sources/javacc
  • int staleMillis - The granularity in milliseconds of the last modification date for testing whether a source needs recompilation. Defaults to 0
  • String[] includes - A set of Ant-like inclusion patterns used to select files from the source directory for processing. By default, the patterns **/*.jj and **/*.JJ are used to select grammar files.
  • String[] excludes - A set of Ant-like exclusion patterns used to prevent certain files from being processed. By default, this set is empty such that no files are excluded.
• jjdoc - 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.
• jjtree-javacc - preprocesses decorated grammar files (*.jjt) with JJTree and passes the output to JavaCC in order to finally generate a parser with parse tree actions.
• jtb-javacc - preprocesses ordinary grammar files (*.jtb) with JTB and passes the output to JavaCC in order to finally generate a parser with parse tree actions.

Integration tests

• To run the integration tests use the following commandline mvn clean install -Dit=true
• If you have a proxy server in place, edit src/it/settings.xml and add it there
• When integration tests are run, they create a folder it-local-repo inside this folder. This is the local Maven repository and is safe to be deleted.
• When running the IT, the files are located in target/it - so check all the build logs there

External links

• ParserGeneratorCC is located on https://github.com/phax/ParserGeneratorCC
• Java CC sources are finally on GitHub at https://github.com/javacc/javacc

News and noteworthy

• v4.1.4 - 2020-05-13
  • Updated to ParserGeneratorCC 1.1.3
• v4.1.3 - 2019-05-02
  • Updated to ParserGeneratorCC 1.1.2
• v4.1.2 - 2019-01-28
  • Updated to ParserGeneratorCC 1.1.1 - had an error in the modern templates
• v4.1.1 - 2018-12-03
  • JJDoc now runs without forking
  • Made plugin threadsafe (see issue #14)
• v4.1.0 - 2018-10-25
  • Updated to ParserGeneratorCC 1.1.0 - INCOMPATIBLE!
  • Changed PGCC templates - INCOMPATIBLE!
  • Added OUTPUT_ENCODING option
• v4.0.3 - 2018-03-09
  • Fixed error passing JAVA_TEMPLATE_TYPE option in jjtree-java goal
• v4.0.2 - 2018-03-09
  • Removed STATIC option - INCOMPATIBLE!
  • Added JAVA_TEMPLATE_TYPE option
• v4.0.1 - 2018-01-08
  • Updated to ParserGeneratorCC 1.0.2 so that this plugin can be used to build ParserGeneratorCC
  • Minimum JDK version is 1.5
• v4.0.0 - 2018-01-05
  • Switched to https://github.com/phax/ParserGeneratorCC a fork of JavaCC 7.0.3
• v3.0.0 - 2017-11-07
  • Changed minimum requirement to JDK 8
  • Requires Maven 3 for execution
  • Using JavaCC 7.0.3
  • Removed deprecated classes
• v2.8.2 - 2016-11-19
  • Fixing javacc/javacc#2 locally
• v2.8.1 - 2016-07-13
  • Fixed a problem with the code generation for "modern" Java template

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