question: public String toString ( ) { StringBuffer sb ; if ( serverPrepareResult != null ) { sb = new StringBuffer ( "sql : '" + serverPrepareResult . getSql ( ) + "'" ) ; if ( parameterCount > 0 ) { sb . append ( ", parameters : [" ) ; for ( int i = 0 ; i < parameterCount ; i ++ ) { ParameterHolder holder = currentParameterHolder . get ( i ) ; if ( holder == null ) { sb . append ( "null" ) ; } else { sb . append ( holder . toString ( ) ) ; } if ( i != parameterCount - 1 ) { sb . append ( "," ) ; } } sb . append ( "]" ) ; } } else { sb = new StringBuffer ( "sql : '" + sql + "'" ) ; sb . append ( ", parameters : [" ) ; for ( int i = 0 ; i < currentParameterHolder . size ( ) ; i ++ ) { ParameterHolder holder = currentParameterHolder . get ( i ) ; if ( holder == null ) { sb . append ( "null" ) ; } else { sb . append ( holder . toString ( ) ) ; } if ( i != currentParameterHolder . size ( ) - 1 ) { sb . append ( "," ) ; } } sb . append ( "]" ) ; } return sb . toString ( ) ; }
target:  Return sql String value.