question: private String matchMap ( ArrayList < ELNode . Function > functions ) { String mapName = null ; for ( int i = 0 ; i < functions . size ( ) ; i ++ ) { ELNode . Function f = functions . get ( i ) ; String temName = gMap . get ( f . getPrefix ( ) + ':' + f . getName ( ) + ':' + f . getUri ( ) ) ; if ( temName == null ) { return null ; } if ( mapName == null ) { mapName = temName ; } else if ( ! temName . equals ( mapName ) ) { return null ; } } return mapName ; }
target:  Find the name of the function mapper for an EL.  Reuse a previously generated one if possible.