protected void addCachedExtensionVersion ( String feature , E extension ) { // versions List < E > versions = this . extensionsVersions . get ( feature ) ; if ( versions == null ) { versions = new ArrayList < E > ( ) ; this . extensionsVersions . put ( feature , versions ) ; versions . add ( extension ) ; } else { int index = 0 ; while ( index < versions . size ( ) && extension . getId ( ) . getVersion ( ) . compareTo ( versions . get ( index ) . getId ( ) . getVersion ( ) ) < 0 ) { ++ index ; } versions . add ( index , extension ) ; } }
Register extension in all caches .