private ImmutableTerm getNestedConcat ( String str ) { List < ImmutableTerm > terms ; terms = addToTermsList ( str ) ; if ( terms . size ( ) == 1 ) { return terms . get ( 0 ) ; } ImmutableFunctionalTerm f = termFactory . getImmutableFunctionalTerm ( ExpressionOperation . CONCAT , terms . get ( 0 ) , terms . get ( 1 ) ) ; for ( int j = 2 ; j < terms . size ( ) ; j ++ ) { f = termFactory . getImmutableFunctionalTerm ( ExpressionOperation . CONCAT , f , terms . get ( j ) ) ; } return f ; }
in case of more than two terms need to be concatted