Wildcard for any types of Array?

Hi,
I want to create a method who convert an array of any type
to an array of type Object.
Is there a way to use a wildcard for the arrays like "T[]"
My compiler - JBuilder 2005 - don't accept this.
Olek

You will have to build special cases for each primitive type. Basically, a series of (inputArray instanceof int[]) conditions, and in each you need to copy from the primitive array to the Object array (or the primitive-specific wrapper such as Integer[], depending on what you want).
System.arraycopy() will not copy between primitive and reference type arrays, so that won't work.

Similar Messages

How to create a vi that can be connected to any type of array

I would enjoy to create a vi that can perform an operation (like resizing) on any type of array (array of string, of cluster, of num,...): Which type of control or indicator could I use for this purpose? Any Idea?
Thank's for your help

Olivier,
to do this you have to use a variant input. You can wire any type of data to a variant input. Inside the VI you flatten the variant to a string. The flattened string of an array contains both data and length of the array. You reshape the array manipulating the string. When done, you unflatten the data to a variant and output it from the VI. The caller has to convert the variant input to the source array type. OpenG.org provides a quite extensive toolkit to manipulate variant data. Some VIs specifically manipulates arrays. To see a description of VIs go to : http://opengtoolkit.sourceforge.net/lvdata/index.html
LabVIEW Data Tools can be downloaded from http://sourceforge.net/projects/opengtoolkit/
You need both packages lvdata AND error.
LabVIEW, C'est LabVIEW

For any type selector

This might be covered elsewhere in the forum but my searches have been fruitless.
Given:
public Object genKey(Class clazz) {
}and
public interface Keyed<K> {
public void setKey(K key);
public Class<K> keyClass();
}this is a valid use:
Keyed<X> keyed = ...;
Object key = genKey(keyed.keyClass());
keyed.setKey(keyed.keyClass().cast(key));
...Now, say I have some framwork code that checks that an arbitrary object implements Keyed and assigns a key if it does:
if ( Keyed.class.isAssignableFrom( obj.getClass() ) {
Keyed keyed = (Keyed)obj;
Object key = genKey(keyed.keyClass());
keyed.setKey( keyed.keyClass().cast(key));
...Of course, the call to setKey generates a warning. But there is enough information there for the compiler to determine that the call is type-safe.
What I seek is a way to declare the variable keyed with the semantics "for any type Y" as the generic selector. A wildcard doesn't work because it doesn't provide a handle to the selected type.
Is there some way to to express this meaning in Java 5 or am I stuck with the warning?
if ( Keyed.class.isAssignableFrom( obj.getClass() ) {
Keyed<any Y> keyed = (Keyed)obj;
Object key = genKey(keyed.keyClass());
keyed.setKey( keyed.keyClass().cast(key));
}Tia,
-=greg

I omitted some explanation to keep it simple, but I probably made it less clear.
this is a valid use:
What do you mean by "valid use"? Do you mean it
"compiles"? Of course, it does compile, as cast()
takes any Object as parameter, regardless if the cast
will succeed.I understand this. By valid, I mean the it is type-safe from the compiler's
point of view. I know that an invalid cast will throw an exception at runtime
and that by using the cast call, I assume responsibility.
if ( Keyed.class.isAssignableFrom( obj.getClass() )
Keyed keyed = (Keyed)obj;
Object key = genKey(keyed.keyClass());
keyed.setKey( keyed.keyClass().cast(key));
...Of course, the call to setKey generates a warning.
But there is enough information there for the
compiler to determine that the call is type-safe.No, it's not. You are using raw type Keyed here, so
there is no type-safety involved. The cast may
succeed or fail, who knows? Again, just talking about the compile-time safety interpretation here. Ignore
the potential runtime exceptions.
There is enough information here in the sense that any Class instance
returned from the keyClass() call is guaranteed to be compatible with the
parameter type of the setKey(..) call--according to the interface definition
alone. The interface implementation could, of course, return all kinds of
wrong things. But the issue I was trying to address in this post has only to do
with the compiler warning issued in the setKey(..) call.
You can use Keyed<T> keyed = (Keyed)
obj; so you actually see the origin of the
warning. Information on T only is available at
compile-time. There is no Keyed<T>.class, so you can
neither test its assignability nor cast to it. Hence,
the warning about erasure. The rest of your code
still remains the same, unsafe code, while the
compiler gets forced to accept it as type safe.I know this. I am simply trying determine if there is a way to, as a
compile-time benefit only, introduce a binding of the "for any" kind. It is a
useful semantic that I don't think is available in the language.
A first thing would be to parametrize genKey, e.g.:
public <T> T genKey(Class<T> clazz) throws
InstantiationException, IllegalAccessException {
return clazz.newInstance();
And, indeed, it is actually implemented in such a fashion--I provided the
version I did because it spells out the problem more clearly. The problem
is that in the framework code snippet ONLY, there is no way to express the
selector because, as you have pointed out, it cannot be determined.
So, the original question is the same--and I think the answer is probably
"no": can an arbitrary selector be introduced with the meaning "for any?"
Wildcarding is inches from being the right meaning but there is no selector
introduction.
Secondly, you will have to define a type to be used
in the context, so you can connect outcomes to a
@SuppressWarnings("unchecked")
Keyed<T> keyed = (Keyed) obj;
Right. Doing this is closest to what I was seeking but it is not a true
representation of the semantic (i.e. it still generates a warning).
So, what I'm hearing so far is, "no, there is not a syntactic construct that will
express a 'for any selector' concept other than to force it and accept the
resulting warning." That answer is fine with me, I just didn't want to miss out
on any better way.
-=greg

How can I find Top music charts for any type of music? Reggae, French etc.

Itunes used to have a way to see all the charts for any type of music. 60's, international, Latin, but I don't see a way to find this anymore. Can anybody help me?

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declare
v_count number := 0;
v_row_count number := 0;
v_col_name varchar2(100);
q varchar2(4000) := 'select ';
v_table_name varchar2(100) := :SOME_TABLE_NAME;
v_id varchar2(100) := 'num = '||:SOME_APEX_VALUE;
my_c INTEGER;
fdbk INTEGER;
statement varchar2(2000);
cval_out varchar2(2000);
nval_out number;
begin
select count(*) into v_count from cols
where table_name = v_table_name;
for counter in 1..v_count
loop
select column_name into v_col_name
from cols where table_name = v_table_name
and counter = column_id;
statement := 'select count(*) '||
' from '||v_table_name||
' where '||v_col_name||' is not null and '||v_id;
my_c := dbms_sql.open_cursor;
dbms_sql.parse(my_c,statement,dbms_sql.native);
dbms_sql.define_column(my_c,1,nval_out);
fdbk := dbms_sql.execute(my_c);
LOOP
exit when dbms_sql.fetch_rows(my_c) = 0;
dbms_sql.column_value(my_c,1,nval_out);
end loop;
v_row_count := nval_out;
dbms_sql.close_cursor(my_c);
if v_row_count > 0 then
q:=q||v_col_name||',';
end if;
end loop;
if(substr(q,length(q),1) = ',') then
q:= substr(q,0,length(q)-1);
end if;
q:= q||' from '||v_table_name||' where '||v_id;
end;Hope this helps...
-David
Message was edited by:
rdpatric

Hi Gints,
Thank you for your reply. This is my query and
nvl(TICKET_JOIN.TDQRLV,0) ACC_SHIPPED_QTY,
TICKET_JOIN.TDSOQS QUANTITY_TICKETED are the columns tha's creating issue. If I comment those columns Index is accessed properly.
select
'TKT' SOURCE,
TICKET_JOIN.TKDO01 HIRE_ID,
TICKET_JOIN.TKQ101 TRUCK_ID,
TICKET_JOIN.TKVEHT TRUCK_TYPE,
1 TRUCK_COMM,
nvl(TKCMP1,0) TICKET_NUM,
nvl(TKADTM,0) TICKET_TIME,
--TICKET_JOIN.TDSOQS QUANTITY_TICKETED,
0 CHECKIN_TIME,
--nvl(TICKET_JOIN.TDQRLV,0) ACC_SHIPPED_QTY,
nvl(DDADTM,0) START_TIME
from
(select
TICKET.TKCMP1,
TICKET.TKDO01,
TICKET.TKQ101,
TICKET.TKADTM ,
TICKET.TKVEHT,
TICKET_DETAILS.TDAITM ,
TICKET_DETAILS.TDQRLV ,
TICKET_DETAILS.TDSOQS ,
TICKET.TKCNTF,
TICKET.TKTRDJ,
TICKET.TK58GA8
from
CRPDTA.F5800091 TICKET_DETAILS ,
CRPDTA.F5800090 TICKET
where TICKET.TKCMP1 = TICKET_DETAILS.TDCMP1
and TICKET.TKTRDJ = TICKET_DETAILS.TDTRDJ
and TICKET.TKTRDJ = 107085
and TICKET.TKEV12 <> 'Y'
and TICKET.TK58GA8='ECSEO'
and TICKET.TKCNTF = '11') TICKET_JOIN ,
(select
DDDOCO,
DDCNTF,
DDQTFN,
DDAITM,
DDADTM,
DD58GA8,
DDTRDJ
from
CRPDTA.F5800051 ORDER_DETAILS,
CRPDTA.F5800050 ORDER_HEADER
where
ORDER_HEADER.DHDOCO = ORDER_DETAILS.DDDOCO
and ORDER_HEADER.DHTRDJ = ORDER_DETAILS.DDTRDJ
and ORDER_HEADER.DH58GA8 = ORDER_DETAILS.DD58GA8
and ORDER_HEADER.DHDCTO = ORDER_DETAILS.DDDCTO
/*and
(ORDER_HEADER.DHTRDJ = 107085
OR (ORDER_HEADER.DHTRDJ = 107084 and ORDER_HEADER.DHEV04='Y')
and TRIM(ORDER_HEADER.DH58GA8) = 'ECSEO'
and TRIM(ORDER_DETAILS.DDCNTF) = '11' ) ORDER_VIEW
where TICKET_JOIN.TKTRDJ = ORDER_VIEW.DDTRDJ
and TICKET_JOIN.TDAITM = ORDER_VIEW.DDAITM
and TICKET_JOIN.TKCNTF = ORDER_VIEW.DDCNTF
and TICKET_JOIN.TK58GA8 = ORDER_VIEW.DD58GA8
and NOT EXISTS ( select 1 from CRPDTA.F5800120 TRUCK_ASSIGNMENT
where TATRDJ = 107085
and TACNTF = '11'
and TA58GA8 = 'ECSEO'
and TICKET_JOIN.TKQ101||TICKET_JOIN.TKVEHT = TAQ101||TAVEHT )
Thanks
GM

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The wildcard for exactly 1 character is '?'.
example: with mask ????????.STA     , I get the following files:
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BWMDAADW.STA
BWMDAAEW.STA
BWMDAAFW.STA
BWMDAAGW.STA
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test2
test3
test4
y5c01
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IBAN
PBCL
rfbi
stxh
stxl
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with BW*, the result is
BWMDAACW.STA
BWMDAADW.STA
BWMDAAEW.STA
BWMDAAFW.STA
BWMDAAGW.STA
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It seems very strange! What are the rules for wildcards ? (I'm in 4.7)
thanks in advance

CONSTANTS DAYS1980     TYPE I VALUE 3652.
DATA: linelength TYPE i VALUE 0.
DATA: linelength1 TYPE i VALUE 0.
DATA: text TYPE string.
DATA: DLIST    LIKE EPSFILI OCCURS 0 WITH HEADER LINE,
      DPATH    LIKE EPSF-EPSDIRNAM,
      PFILE    LIKE EPSF-EPSFILNAM,
      MDATE    LIKE SY-DATUM,
      MTIME    LIKE SY-UZEIT,
      POINT_IN_TIME TYPE I.
DATA: BEGIN OF FATTR OCCURS 0,
          FILE_NAME LIKE EPSF-EPSFILNAM,
          FILE_SIZE LIKE EPSF-EPSFILSIZ,
          FILE_OWNER LIKE EPSF-EPSFILOWN,
          FILE_MODE LIKE EPSF-EPSFILMOD,
          FILE_TYPE LIKE EPSF-EPSFILTYP,
          FILE_MTIME(12),
      END OF FATTR.
PARAMETER P_PATH(50) TYPE C DEFAULT '/TMP' LOWER CASE.
PARAMETER P_FILE(50) TYPE C DEFAULT ' ' LOWER CASE.
DPATH = P_PATH.
PFILE = P_FILE.
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     EXPORTING
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*          FILE_MASK              = PFILE
     TABLES
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          SAPGPARAM_FAILED       = 2
          BUILD_DIRECTORY_FAILED = 3
          NO_AUTHORIZATION       = 4
          READ_DIRECTORY_FAILED = 5
          TOO_MANY_READ_ERRORS   = 6
          EMPTY_DIRECTORY_LIST   = 7
          OTHERS                 = 8.
break developer.
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linelength = STRLEN( DLIST-NAME ).
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linelength1 = STRLEN( P_FILE ).
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         EXPORTING
              FILE_NAME              = DLIST-NAME
              DIR_NAME               = DPATH
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              FILE_OWNER             = FATTR-FILE_OWNER
              FILE_MODE              = FATTR-FILE_MODE
              FILE_TYPE              = FATTR-FILE_TYPE
              FILE_MTIME             = FATTR-FILE_MTIME
         EXCEPTIONS
              READ_DIRECTORY_FAILED = 1
              READ_ATTRIBUTES_FAILED = 2
              OTHERS                 = 3.
    IF SY-SUBRC EQ 0.
      FATTR-FILE_NAME = DLIST-NAME.
      APPEND FATTR.
    ENDIF.
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SORT FATTR BY FILE_NAME.
LOOP AT FATTR.
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         EXPORTING
              POINT_IN_TIME = POINT_IN_TIME
         IMPORTING
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              TIME          = MTIME
         EXCEPTIONS
              OTHERS        = 1.
    SUBTRACT DAYS1980 FROM MDATE.
    WRITE: / FATTR-FILE_NAME,
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             MDATE,
             MTIME.
ENDLOOP.
ENDIF.
Edited by: kk.adhvaryu on Sep 25, 2010 12:08 PM

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using System.Linq;
using System.Text;
using System.Threading.Tasks;
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I am facing error while running Quickpay in Fusion payroll that "The input value Periodicity is missing for element type KGOC_Unpaid_Absence_Amount. Enter a valid input value". Any idea?

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Wildcard for any types of Array?

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