io.oss84.geotools.maven:jjtree-javacc (maven):  This Maven plugin run 'jjtree' on a set of .jjt files found in the source directory, which generates a set of .jj files. Next, this plugin executes 'javacc' on those .jj files in order to generate the .java files. All generated files are stored in a 'target/generated-sources' directory and are part of the compilation phase. 
Keywords: geojson|geospatial|geotools|gis|java|mongodb|mysql|oracle-spatial|postgis|shapefile|sqlserver