Storing details of objects in an array in a class

Hi there
New to all this class malarkey so having some teething
problems and could do with some help.
I have written a function to display 10 stars on screen using
attachMovie
i.e
var vStar_Object = attachMovie(vLinkage_Name, vInstance_Name,
vDepth);
I later need to access these star objects to enable me to
animate them to certain positions on screen.
I am therefore trying to create a starManager class to store
the details of these star objects.
Here is my class so far:
class classes.starManager {
// Constructor
public function starManager() {
trace ("starManager class constructor");
var List_Of_Star_Objects:Array = new Array();
// Add Star Object
public function
Add_Star_Object(passed_Star_Object:Object):Void {
List_Of_Star_Objects.push(passed_Star_Object);
I have created an instance of this class as follows:
myStarManager = new starManager();
Therefore in the loop that creates my 10 star objects I call
the function "Add_Star_Object" as follows:
myStarManager.Add_Star_Object(vStar_Object);
However I am getting the following error message:
There is no method with the name 'List_Of_Star_Objects'.
List_Of_Star_Objects.push(passed_Star_Object);
Any ideas what I am doing wrong here or suggestions as how
this is best done. Basically I need to store some reference to my
star objects and I do not want to use globals.
Thanks in advance
Paul

Before the constructor method
// Class variables
private var List_Of_Star_Objects:Array();
In the constructor method
change var List_Of_Star_Objects:Array = new Array();
to List_Of_Star_Objects:Array = new Array();
or this.List_Of_Star_Objects:Array = new Array();
I recommend not capitalizing the first letter of variable
names. Initial
caps normally indicates a class name.
Lon Hosford
www.lonhosford.com
Flash, Actionscript and Flash Media Server examples:
http://flashexamples.hosfordusa.com
May many happy bits flow your way!
"ChuckyLeFrek" <[email protected]> wrote in
message
news:[email protected]...
> Hi there
>
> New to all this class malarkey so having some teething
problems and could
> do
> with some help.
>
> I have written a function to display 10 stars on screen
using attachMovie
>
> i.e
>
> var vStar_Object = attachMovie(vLinkage_Name,
vInstance_Name, vDepth);
>
> I later need to access these star objects to enable me
to animate them to
> certain positions on screen.
>
> I am therefore trying to create a starManager class to
store the details
> of
> these star objects.
>
> Here is my class so far:
>
> #############################
>
> class classes.starManager {
>
> // -----------
> // Constructor
> // -----------
>
> public function starManager() {
>
>
> trace ("starManager class constructor");
>
> var List_Of_Star_Objects:Array = new Array();
>
>
>
> }
>
>
>
> // ---------------
> // Add Star Object
> // ---------------
>
> public function
Add_Star_Object(passed_Star_Object:Object):Void {
>
>
> List_Of_Star_Objects.push(passed_Star_Object);
>
>
> }
>
>
>
> }
>
> #################################
>
> I have created an instance of this class as follows:
>
> myStarManager = new starManager();
>
> Therefore in the loop that creates my 10 star objects I
call the function
> "Add_Star_Object" as follows:
>
> myStarManager.Add_Star_Object(vStar_Object);
>
>
> However I am getting the following error message:
>
> There is no method with the name 'List_Of_Star_Objects'.
> List_Of_Star_Objects.push(passed_Star_Object);
>
>
> Any ideas what I am doing wrong here or suggestions as
how this is best
> done.
> Basically I need to store some reference to my star
objects and I do not
> want
> to use globals.
>
> Thanks in advance
>
> Paul
>
>
>

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Implode wrote:
We had the arrayList/collections lecture today.
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1
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I tried making as few changes to your code as possible, but your idea should basically work. Potential problems:
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4. No cleanup of file resources after you have completed
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          catch(NumberFormatException e){
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     private int xx;
     private int yy;
     public Pair(int x, int y) {
          xx = x;
          yy = y;
     public String toString() {
          return("X = " + xx + " Y = " + yy);
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    header_id INTEGER,
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          Detail dtl = new Detail();
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Message was edited by:
pcristini

Oracle® Database Object-Relational Developer's Guide
Also note that object relational database design is often less performant and scalable than relational. It is not very often used in production environments.
However, the object orientated programming feature that is provided with Oracle object feature set are used and can make development and interfaces a lot easier.
So in a nutshell. Say no to ref and nested table columns. Say yes to most of the other object features. IMO of course...

How can i convert object to byte array very*100 fast?

i need to transfer a object by datagram packet in embeded system.
i make a code fallowing sequence.
1) convert object to byte array ( i append object attribute to byte[] sequencailly )
2) send the byte array by datagram packet ( by JNI )
but, it's not satisfied my requirement.
it must be finished in 1ms.
but, converting is spending 2ms.
network speed is not bottleneck. ( transfer time is 0.3ms and packet size is 4096 bytes )
Using ObjectOutputStream is very slow, so i'm using this way.
is there antoher way? or how can i improve?
Edited by: JongpilKim on May 17, 2009 10:48 PM
Edited by: JongpilKim on May 17, 2009 10:51 PM
Edited by: JongpilKim on May 17, 2009 10:53 PM

thanks a lot for your reply.
now, i use udp socket for communication, but, i must use hardware pci communication later.
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for convert a object to byte array,
i used ObjectInputStream before, but it was so slow.
so, i change the implementation to use byte array directly, like ByteBuffer.
ex)
public class ByteArrayHelper {
private byte[] buf = new byte[1024];
int idx = 0;
public void putInt(int val){
buf[idx++] = (byte)(val & 0xff);
buf[idx++] = (byte)((val>>8) & 0xff);
buf[idx++] = (byte)((val>>16) & 0xff);
buf[idx++] = (byte)((val>>24) & 0xff);
public void putDouble(double val){ .... }
public void putFloat(float val){ ... }
public byte[] toByteArray(){ return this.buf; }
public class PacketData {
priavte int a;
private int b;
public byte[] getByteArray(){
ByteArrayHelper helper = new ByteArrayHelper();
helper.putInt(a);
helper.putInt(b);
return helper.toByteArray();
but, it's not enough.
is there another way to send a object data?
in java language, i can't access memory directly.
in c language, if i use struct, i can send struct data to copy memory by socket and it's very fast.
Edited by: JongpilKim on May 18, 2009 5:26 PM

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//import necessary classes
import java.util.Scanner;
import java.io.File;
import java.io.IOException;
import java.io.BufferedWriter;
import java.io.FileWriter;
import javax.swing.JOptionPane;
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public DanMPA6() throws IOException
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scan.useDelimiter("[|\n\r]+");
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       int passSurvive;
       String passName;
       double passAge;
       String passFrom;
       String passTo;
       String passRoom;
       String passTicket;
       String passLifeboat;
       String passSex;
       public Passenger (int fakeID, String fakeClass, int fakeSurvive, String fakeName, double fakeAge, String fakeFrom, String fakeTo, String fakeRoom, String fakeTicket, String fakeLifeboat, String fakeSex)
       passID = fakeID;
       passClass = fakeClass;
       passSurvive = fakeSurvive;
       passName = fakeName;
       passAge = fakeAge;
       passFrom = fakeFrom;
       passTo = fakeTo;
       passRoom = fakeRoom;
       passTicket = fakeTicket;
       passLifeboat = fakeLifeboat;
       passSex = fakeSex;


Thank you very much! That worked. So now I have all my objects in the array, but it seems that I'm running into a different problem when I attempt to output the results into a different .txt file. It creates the file, but with nothing in it! I even tried just a basic line of text and that didn't work either.
This is the code that I was attempting to do that with:
FileWriter fw = new FileWriter (outFile, false);
BufferedWriter bw = new BufferedWriter(fw);
bw.write(ayPass[count] + "\n");

Converting object wrapper type array into equivalent primary type array

Hi All!
My question is how to convert object wrapper type array into equivalent prime type array, e.g. Integer[] -> int[] or Float[] -> float[] etc.
Is sound like a trivial task however the problem is that I do not know the type I work with. To understand what I mean, please read the following code -
//Method signature
Object createArray( Class clazz, String value ) throws Exception;
//and usage should be as follows:
Object arr = createArray( Integer.class, "2%%3%%4" );
//"arr" will be passed as a parameter of a method again via reflection
public void compute( Object... args ) {
    a = (int[])args[0];
//or
Object arr = createArray( Double.class, "2%%3%%4" );
public void compute( Object... args ) {
    b = (double[])args[0];
//and the method implementation -
Object createArray( Class clazz, String value ) throws Exception {
     String[] split = value.split( "%%" );
     //create array, e.g. Integer[] or Double[] etc.
     Object[] o = (Object[])Array.newInstance( clazz, split.length );
     //fill the array with parsed values, on parse error exception will be thrown
     for (int i = 0; i < split.length; i++) {
          Method meth = clazz.getMethod( "valueOf", new Class[]{ String.class });
          o[i] = meth.invoke( null, new Object[]{ split[i] });
     //here convert Object[] to Object of type int[] or double[] etc...
     /* and return that object*/
     //NB!!! I want to avoid the following code:
     if( o instanceof Integer[] ) {
          int[] ar = new int[o.length];
          for (int i = 0; i < o.length; i++) {
               ar[i] = (Integer)o;
          return ar;
     } else if( o instanceof Double[] ) {
     //...repeat "else if" for all primary types... :(
     return null;
Unfortunately I was unable to find any useful method in Java API (I work with 1.5).
Did I make myself clear? :)
Thanks in advance,
Pavel Grigorenko

I think I've found the answer myself ;-)
Never thought I could use something like int.class or double.class,
so the next statement holds int[] q = (int[])Array.newInstance( int.class, 2 );
and the easy solution is the following -
Object primeArray = Array.newInstance( token.getPrimeClass(), split.length );
for (int j = 0; j < split.length; j++) {
     Method meth = clazz.getMethod( "valueOf", new Class[]{ String.class });
     Object val = meth.invoke( null, new Object[]{ split[j] });
     Array.set( primeArray, j, val );
}where "token.getPrimeClass()" return appropriate Class, i.e. int.class, float.class etc.

Problem occured when create a tree table for master-detail view objects using SQL queries?

I am programming a tree table for master-detail view objects using SQL queries and these 2 view objects are not simple singel tables queries, and 2 complex SQL are prepared for master and view objects. see below:
1. Master View object (key attribute is SourceBlock and some varaible bindings are used for this view object.)
SELECT cntr_list.SOURCE_BLOCK,
        sum(
         case when cntr_list.cntr_size_q = '20'
              then cntr_list.cntr_qty
              else 0 end ) as cntr20 ,
        sum(
         case when cntr_list.cntr_size_q = '40'
              then cntr_list.cntr_qty
              else 0 end ) as cntr40 ,
         sum(
         case when cntr_list.cntr_size_q = '45'
              then cntr_list.cntr_qty
              else 0 end ) as cntr45
FROM (
    SELECT yb1.BLOCK_M as SOURCE_BLOCK,
           scn.CNTR_SIZE_Q,
           count(scn.CNTR_SIZE_Q) AS cntr_qty
    FROM SHIFT_CMR scm, SHIFT_CNTR scn, YARD_BLOCK yb1, YARD_BLOCK yb2
    WHERE
    scm.cmr_n = scn.cmr_n
    AND (scm.plan_start_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS')
    OR scm.plan_end_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS'))
    AND scm.shift_mode_c = :ShiftModeCode
    AND scm.end_terminal_c = :TerminalCode
    AND scm.start_terminal_c = yb1.terminal_c
    AND scm.start_block_n = yb1.block_n
    AND substr(scn.start_location_c,(instr(scn.start_location_c,',',1,5)+1),instr(scn.start_location_c,',',1,6)-(instr(scn.start_location_c,',',1,5)+1)) BETWEEN yb1.slot_from_n AND yb1.slot_to_n
    AND scm.end_terminal_c = yb2.terminal_c
    AND scm.end_block_n = yb2.block_n
    AND substr(scn.end_location_c,(instr(scn.end_location_c,',',1,5)+1),instr(scn.end_location_c,',',1,6)-(instr(scn.end_location_c,',',1,5)+1)) BETWEEN yb2.slot_from_n AND yb2.slot_to_n
    AND scn.status_c not in (1, 11)
    AND scn.shift_type_c = 'V'
    AND scn.source_c = 'S'
    GROUP BY yb1.BLOCK_M, scn.CNTR_SIZE_Q
) cntr_list
GROUP BY cntr_list.SOURCE_BLOCK
2. Detail View object (key attributes are SourceBlock and EndBlock and same varaible bindings are used for this view object.)
SELECT cntr_list.SOURCE_BLOCK, cntr_list.END_BLOCK,
        sum(
         case when cntr_list.cntr_size_q = '20'
              then cntr_list.cntr_qty
              else 0 end ) as cntr20 ,
        sum(
         case when cntr_list.cntr_size_q = '40'
              then cntr_list.cntr_qty
              else 0 end ) as cntr40 ,
         sum(
         case when cntr_list.cntr_size_q = '45'
              then cntr_list.cntr_qty
              else 0 end ) as cntr45
FROM (
    SELECT yb1.BLOCK_M as SOURCE_BLOCK,
           yb2.BLOCK_M as END_BLOCK,
           scn.CNTR_SIZE_Q,
           count(scn.CNTR_SIZE_Q) AS cntr_qty
    FROM SHIFT_CMR scm, SHIFT_CNTR scn, YARD_BLOCK yb1, YARD_BLOCK yb2
    WHERE
    scm.cmr_n = scn.cmr_n
    AND (scm.plan_start_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS')
    OR scm.plan_end_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS'))
    AND scm.shift_mode_c = :ShiftModeCode
    AND scm.end_terminal_c = :TerminalCode
    AND scm.start_terminal_c = yb1.terminal_c
    AND scm.start_block_n = yb1.block_n
    AND substr(scn.start_location_c,(instr(scn.start_location_c,',',1,5)+1),instr(scn.start_location_c,',',1,6)-(instr(scn.start_location_c,',',1,5)+1)) BETWEEN yb1.slot_from_n AND yb1.slot_to_n
    AND scm.end_terminal_c = yb2.terminal_c
    AND scm.end_block_n = yb2.block_n
    AND substr(scn.end_location_c,(instr(scn.end_location_c,',',1,5)+1),instr(scn.end_location_c,',',1,6)-(instr(scn.end_location_c,',',1,5)+1)) BETWEEN yb2.slot_from_n AND yb2.slot_to_n
    AND scn.status_c not in (1, 11)
    AND scn.shift_type_c = 'V'
    AND scn.source_c = 'S'
    GROUP BY yb1.BLOCK_M, yb2.BLOCK_M, scn.CNTR_SIZE_Q
) cntr_list
GROUP BY cntr_list.SOURCE_BLOCK, cntr_list.END_BLOCK
3. I create a view link to create master-detail relationship for these 2 view objects.
masterview.SourceBlock (1)->detailview.SourceBlock (*).
4. I create a tree table using these 2 view objects with master-detail relationship.
When I set default value for variable bindings of these 2 view objects and the matching records exist, tree table can work well. I can expand the master row to display detail row in UI.
But I need to pass in dymamic parameter value for variable bindings of these 2 view objects, tree table cannnot work again. when I expand the master row and no detail row are displayed in UI.
I am sure that I pass in correct parameter value for master/detail view objects and matching records exist.
Managed Bean:
        DCIteratorBinding dc = (DCIteratorBinding)evaluteEL("#{bindings.MasterView1Iterator}");
        ViewObject vo = dc.getViewObject();
        System.out.println("Before MasterView1Iterator vo.getEstimatedRowCount()="+ vo.getEstimatedRowCount());
        System.out.println("Before MasterView1Iterator ShiftModeCode="+ vo.ensureVariableManager().getVariableValue("ShiftModeCode"));
        vo.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
        vo.ensureVariableManager().setVariableValue("DateTo", dateTo);
        vo.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
        vo.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
        vo.executeQuery();
        System.out.println("MasterView1Iterator vo.getEstimatedRowCount()="+ vo.getEstimatedRowCount());
        DCIteratorBinding dc1 = (DCIteratorBinding)evaluteEL("#{bindings.DetailView1Iterator}");
        ViewObject vo1 = dc1.getViewObject();
        System.out.println("Before DetailView1Iterator vo1.getEstimatedRowCount()="+ vo1.getEstimatedRowCount());
        System.out.println("Before DetailView1Iterator ShiftModeCode="+ vo1.ensureVariableManager().getVariableValue("ShiftModeCode"));
        vo1.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
        vo1.ensureVariableManager().setVariableValue("DateTo", dateTo);
        vo1.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
        vo1.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
        vo1.executeQuery();
        System.out.println("after DetailView1Iterator vo1.getEstimatedRowCount()="+ vo1.getEstimatedRowCount());
5. What's wrong in my implementation? I don't have no problem to implement such a tree table if using simple master-detail tables view object, but now I have to use such 2 view objects using complex SQL for my requirement and variable bindings are necessary for detail view object although I also think a bit strange by myself.

Hi Frank,
Thank you and it can work.
public void setLowHighSalaryRangeForDetailEmployeesAccessorViewObject(Number lowSalary,
                                                                          Number highSalary) {
        Row r = getCurrentRow();
        if (r != null) {
            RowSet rs = (RowSet)r.getAttribute("EmpView");
            if (rs != null) {
                ViewObject accessorVO = rs.getViewObject();
                accessorVO.setNamedWhereClauseParam("LowSalary", lowSalary);
                accessorVO.setNamedWhereClauseParam("HighSalary", highSalary);
            executeQuery();
but I have a quesiton in this way. in code snippet, it is first getting current row of current master VO to determine if update variables value of detail VO. in my case, current row is possibly null after executeQuery() of master VO and I have to change current row manually like below.
any idea?
            DCIteratorBinding dc = (DCIteratorBinding)ADFUtil.evaluateEL("#{bindings.SSForecastSourceBlockView1Iterator}");
            ViewObject vo = dc.getViewObject();
            vo.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
            vo.ensureVariableManager().setVariableValue("DateTo", dateTo);
            vo.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
            vo.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
            vo.executeQuery();
            vo.setCurrentRowAtRangeIndex(0);
            ((SSForecastSourceBlockViewImpl)vo).synchornizeAccessorVOVariableValues();

Object tables/associative arrays are using lots of memory what is alternate

I'm using mostly object tables/associative arrays in my package and it is using lots of server memorey so i want to use a different technicque to save momorey .
like using create global temporary table or nested Table Store as or creating table run time at the start and droping it in the end .
do have any suggestion for this ?
for this package i'm retriving data from different table into object tables and do calculation in memorey before i send data to front end for reporting using reference cursor .
give me your suggetion or if you know any example code for this type of process using different technique please let us know .
thank you very much
regards
shailen Patel

You can create a global temporary table like this:
CREATE GLOBAL TEMPORARY TABLE AR_TRIAL_RCPT(
LOC_ACCT_ID NUMBER(12),
ACCT_ID NUMBER(12),
CURRENCY_ID NUMBER(12),
AMT NUMBER(13,   4),
AMT_PRIMARY NUMBER(13,   4)
[ON COMMIT PRESERVE ROWS]
;If you want the table truncated on COMMITs leave out the part in brackets other wise leave off the brackets and the table won't be truncated until your session terminates or you explicitly truncate the table.
You can also define indexes, primary keys, foreign keys, check constraints, etc. on your temporary table if need be to improve processing.
Now when it comes to inserting into your newly minted global temporary table, you should be able to use one of insert statements from the following anonymous PL/SQL block:
CREATE GLOBAL TEMPORARY TABLE AR_TRIAL_RCPT(
LOC_ACCT_ID NUMBER(12),
ACCT_ID NUMBER(12),
CURRENCY_ID NUMBER(12),
AMT NUMBER(13,   4),
AMT_PRIMARY NUMBER(13,   4)
--[ON COMMIT PRESERVE ROWS]
CREATE GLOBAL succeeded.
declare
l_open_receipt_select_1 varchar2(4000) :=
    'select 1, 1, 1, 12.05, 12.05 from dual';
l_open_receipt_select_2 varchar2(4000) :=
    'select 2, 2, 1, 17.05, 17.05 from dual';
l_open_receipt_select_3 varchar2(4000) :=
    'select 3 loc_acct_id,
1 currency_id,
27.05 amt,
3 acct_id,
27.05 amt_primary
from dual';
l_open_receipt_select_4 varchar2(4000) :=
    'select 4 loc_acct_id,
1 currency_id,
24.35 amt,
4 acct_id,
24.35 amt_primary
from dual';
l_ins_stmt varchar2(4000);
begin
-- If the column order is known ahead of time and is consistent
-- You can use this form:
l_ins_stmt :=
    'insert into ar_trial_rcpt (
loc_acct_id, acct_id, currency_id, amt, amt_primary
) '||l_open_receipt_select_1||
' union all '||
l_open_receipt_select_2;
execute immediate l_ins_stmt;
-- If the column order is NOT known ahead of time or is INconsistent
-- You can use this form:
l_ins_stmt :=
    'insert into ar_trial_rcpt (
loc_acct_id, acct_id, currency_id, amt, amt_primary
select loc_acct_id
, acct_id
, currency_id
, amt
, amt_primary
from ('||l_open_receipt_select_3||')
union all
select loc_acct_id
, acct_id
, currency_id
, amt
, amt_primary
from ('||l_open_receipt_select_4||')';
execute immediate l_ins_stmt;
end;
anonymous block completed
select * from ar_trial_rcpt
LOC_ACCT_ID ACCT_ID CURRENCY_ID AMT    AMT_PRIMARY
1           1        1           12.05 12.05
2           2        1           17.05 17.05
3           3        1           27.05 27.05
4           4        1           24.35 24.35
4 rows selected

Storing details of objects in an array in a class

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