JavaCC Examples

This page provides examples of how to use the javacc goal.

Basic Example

This example shows how to pass parameters to JavaCC. A list of all configuration options can be seen on the javacc goal page.

<project>
  ...
  <build>
    <plugins>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>javacc-maven-plugin</artifactId>
        <version>3.1.1</version>
        <executions>
          <execution>
            <id>javacc</id>
            <goals>
              <goal>javacc</goal>
            </goals>
            <configuration>
              <lookAhead>2</lookAhead>
              <isStatic>false</isStatic>
            </configuration>
          </execution>
        </executions>
      </plugin>
      ...
    </plugins>
    ...
  </build>
  ...
</project>

Using Excludes and Includes

Sometimes you may want to process some grammar files before others. In this case the <includes> and <excludes> configuration options can be used. In the example below, all files in the source directory that end with -step-1.jj will be processed by JavaCC, and then all other .jj files will be processed.

<project>
  ...
  <build>
    <plugins>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>javacc-maven-plugin</artifactId>
        <version>3.1.1</version>
        <executions>
          <execution>
            <id>javacc-step-1</id>
            <goals>
              <goal>javacc</goal>
            </goals>
            <configuration>
              <includes>
                <include>**/*-step-1.jj</include>
              </includes>
            </configuration>
          </execution>
          <execution>
            <id>javacc-step-2</id>
            <goals>
              <goal>javacc</goal>
            </goals>
            <configuration>
              <excludes>
                <exclude>**/*-step-1.jj</exclude>
              </excludes>
            </configuration>
          </execution>
        </executions>
      </plugin>
      ...
    </plugins>
    ...
  </build>
  ...
</project>