XmlManager.getDbEnv () returns not-DbEnv object in Python

I'm trying to retrieve the DbEnv object and use it, but
XmlManager.getDbEnv ().get_mp_mmapsize () trows an error:
'PySwigObject' object has no attribute 'get_mp_mmapsize'
What is the proper way to get DbEnv object?XmlManager.getDbEnv() works. I just checked and the DbEnv interface does not appear to include get_mp_mmapsize in Python.
Regards,
George

Similar Messages

Not sure on how to return a new object

hi i am not sure on how to return a new Set object, i am not asking how to code this, i just don't exactly know what to write after "return.." to return a new object ...that part of the code is towards the bottom where i put arrows.....this is the skeleton of the code:
public class Set
     // define fields here
     public Set(int maxinteger)
          // complete this method
     public boolean add(int integer)
          return false; // replace this line with your code
     public boolean remove(int integer)
          return false; // replace this line with your code
     public boolean contains(int integer)
          return false; // replace this line with your code
     public int size()
          return 0; // replace this line with your code
     public String toString()
          return null; // replace this line with your code
     public void addAll(Set other)
          // complete this method
--------->     public Set subset(int min, int max)
          return null; // replace this line with your code
----------->     public Set intersection(Set other)
          return null; // replace this line with your code
------------->     public Set difference(Set other)
          return null; // replace this line with your code
     }

well, when you use return is when trying to make a method have a value that have to be returned from it.
In your case you have a Set CLASS, with methods, some methods have to return Strings, ints, Objects, etc.
just make sure that you are returning the same type of value than the method say.
the method parts are:
modifier returnType name (parameters) {
. code
modifiers are public, private, etc.
the return type specifies what the method will return, for example:
public String toString () {
must return a String value.
to return a new Object just do it like a simple value, Strings are objects.
just define a Set object and then return it.

PL/SQL: ORA-22806: not an object or REF when Using Record in Package

Oracle Database 11g Enterprise Edition Release 11.1.0.7.0
I have declared a record type in my package
create or replace
PACKAGE MYPKG AS
TYPE MYREC IS RECORD (VAL1 varchar2(20), val2 date);
PROCEDURE display_error (pSQLERRM number);
PROCEDURE P_LOAD_DATA (pStartDate Date, pEndDate Date);
FUNCTION F_EPI(refno1 in NUMBER, refno2 in NUMBER) return MYREC;
END MYPKG;
--In My Package Body
FUNCTION F_EPI(refno1 in NUMBER, refno2 in NUMBER) return MYREC is
        F_param MYREC;
        BEGIN
        select myvarchar2, mydate into MYREC from MYTable
          where myrefno1 = refno1
          and myrefno2 = refno2
        Exception
          when others then
          display_error(SQLERRM);
          RETURN F_param;
        END F_EPI ;
PROCEDURE P_LOAD_DATA (pStartDate Date, pEndDate Date) IS
insert into atable(myvarchar, mydate)
select F_EPI(refno1,refno2).val1,F_EPI(refno1,refno2).val2 from tab2;
END P_LOAD_DATA;
I get errors
Error(187,7): PL/SQL: SQL Statement ignored
Error(225,7): PLS-00382: expression is of wrong type
Error(225,7): PL/SQL: ORA-22806: not an object or REF
When I compile the package.
When I try to call the function from SQL I get an Invalid datatype error.

Hi,
Before posting any query/plsql blocks, please ensure that you have written it clean and complete with less syntax errors. ( at least general syntax errors, you can avoid). Then somebody can have an interest to check your logical error.
About your posting, refer below solution step-by-step. It may help you, about what you are looking for? By the way, you must be knowing, what you are going to to do with. I haven't concentrated about your requirement; as it was not missing in your posting.
drop table test;
create table test(myvarchar varchar2(20), mydate date);
create or replace
    package mypkg as
      type myrec is record (val1 varchar2(20), val2 date);
      --procedure display_error (psqlerrm in number); -- if you are passing sqlerrm, then parameter needs to be string type
   procedure display_error (psqlerrm in varchar2);
      procedure p_load_data (pstartdate in date, penddate in date);
      function f_epi(refno1 in number, refno2 in number) return myrec;
   end mypkg;
Package created.
--in my package body
create or replace
package body mypkg as -- added
procedure display_error (psqlerrm in varchar2) -- if you are declared a proc/func in spec, it needs to define in pkg body
is
begin
     null; -- you should know, what to do here
dbms_output.put_line('Err -'||sqlerrm);
end display_error;
function f_epi(refno1 in number,refno2 in number)
return myrec
is
f_param myrec;
begin
   -- select myvarchar2, mydate into MYREC from mytable
-- where myrefno1 = refno1
-- and myrefno2 = refno2;
    select ename, hiredate into f_param from emp -- added demo logic by using emp
    where empno = refno1
     and mgr = refno2;
    return f_param; -- added
exception
   when others then
     raise; -- if you are using OTHERS then, just raise it
   display_error(sqlerrm);
   --return f_param; -- what is this?
end f_epi;
procedure p_load_data (pstartdate in date, penddate in date) -- you must be knowing the use of 2 params ???
is
    v_rec myrec; -- added
begin -- Added
   --insert into atable(myvarchar, mydate)
-- select f_epi(refno1,refno2).val1,f_epi(refno1,refno2).val1 from tab2;
   -- demo logic added with static params to call f_epi
   v_rec:= f_epi(7499,7698);
   insert into test values v_rec;
    --null;
end p_load_data;
end mypkg;
Package body created.
SQL> exec mypkg.p_load_data(null,null);
PL/SQL procedure successfully completed.
SQL> select * from test;
MYVARCHAR            MYDATE
ALLEN                20-FEB-81
Thanks!

Upgrade to Apex 4.2 - apex.widget.tabular' is null or not an object

After upgrading to Apex 4.2 the following error occurrs when loading a page that contains a Group Select List [Plug-in]:
*'apex.widget.tabular' is null or not an object*
The error message appears to be related to a Group Select List [Plug-in] item with the following assigned List of Values attributes(options):
Display Null Value: Yes
Null Display Value: -
Null Return Value: NULL
Note: The application requires a NULL option to be displayed in the list of values (display = '-', value = null). This works fine in Apex 4.1...
Removing the above values does eliminate the error message. However entering any value into the Null Display Value and Null Return Value item attributes causes the error message to reappear.
Is this a known Group Select List [Plug-in] issue/bug? Any ideas on how to work around this issue would be greatly appreciated.
Thx

Hi,
http://apex.oracle.com/plugins contains an updated version of the Group Selectlist plug-in (v1.1) which should fix your problem. Just import it into your application and you should be done.
Regards
Patrick

How to Include Warnings/Error messages in Return Service Data Object

Hello All,
I am using Jdeveloper 11.1.1.3.0, ADF BC. and want to publish Service-Enabled application modules, specifically I want to publish a custome method in the application module as a web service.
While going through Enable support for Service Interface wizard as explained in developer guide, in step 7 I read this
>
7. To expose service information messages such as warnings and exceptions for a custom method or warnings for process operation methods, select Include Warnings in Return Service Data Object. For example, you might want display an informational message when a method returns the total employee compensation and the total is outside of the desired range.
If Include Warnings is not selected, no informational messages will be returned with the service response. This option is only enabled when the method does not return a view row or a list
of view rows. When the method returns view rows, the underlying view object determines whether the method supports warnings, as described Section 11.2.4, "How to Service-Enable Individual View Objects." The informational messages (and warnings) are reported as part of the return object. JDeveloper generates appropriate wrappers as the return objects, and the wrappers contain the actual method return and the informational messages.
>
I am interested in this part: For example, you might want display an informational message when a method returns the total employee compensation and the total is outside of the desired range.
To do this, I write a method in the application module
public Number getEmpSal(Number empId){
        EmployeesViewImpl employeesView1 = this.getEmployeesView1();
        //this is the bind variable setter
        employeesView1.setEmpId(empId);
        employeesView1.executeQuery();
        EmployeesViewRowImpl first = (EmployeesViewRowImpl)employeesView1.first();
       return first!=null ? first.getSalary() : null;
}and I selected the Include Warnings in Return Service Data Object check box. but how and where can I expose the error or warning message?
Note:
I tried to throw an exception in the method
public Number getEmpSal(Number empId){
        EmployeesViewImpl employeesView1 = this.getEmployeesView1();
        //this is the bind variable setter
        employeesView1.setEmpId(empId);
        employeesView1.executeQuery();
        EmployeesViewRowImpl first = (EmployeesViewRowImpl)employeesView1.first();
        if(first!=null && (first.getSalary()!=null || first.getSalary().compareTo(1000)==1))
            throw new JboException("out of range salary");
         return first!=null ? first.getSalary() : null;
}and when I test the web service for some employee I get this response:
<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
<env:Header/>
     <env:Body>
          <env:Fault>
               <faultcode>env:Server</faultcode>
               <faultstring>out of range salary</faultstring>
               <detail><tns:ServiceErrorMessage xmlns:tns="http://xmlns.oracle.com/adf/svc/errors/" xmlns:xsi=      "http://www.w3.org/2001/XMLSchema-instance"><tns:code/><tns:message>out of range salary</tns:message><tns:severity>SEVERITY_ERROR</tns:severity><tns:exceptionClassName>oracle.jbo.JboException</tns:exceptionClassName></tns:ServiceErrorMessage>
               </detail>
          </env:Fault>
     </env:Body>
</env:Envelope>but is this the right approach or there is another place to show error/warning messages?
Edited by: Mohammad Jabr on Apr 16, 2012 1:17 PM

This is fine if you raise exception from your code. It will be raised as a server fault only.

Trying to return a Hashtable object

Hi,
I'm trying to return a Hashtable object from a method defined as:
public static Hashtable getValues(String str){
In the calling method, I'm using:
Hashtable<Object,Object> table=new Hashtable<Object,Object>();
table=(Hashtable<Object,Object>)Test.getValues(str);
I get the compiler warning as shown below:
Note: App.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Upon compiling with -Xlint:unchecked option, I get:
App.java:10: warning: [unchecked] unchecked cast
found : java.util.Hashtable
required: java.util.Hashtable<java.lang.Object,java.lang.Object>
table=(Hashtable<Object,Object>)Test.getValues(str);
^
How can I correct this?
Thanks.
Vijay

were your method to return a Map<Object, Object> rather than a HashMapyou could transparently return either a HashMap or a HashTable - or anything else that implements the Map interface - without changing any of the code that actually calls this method. you will still, obviously, need to instantiate one inside the method
hence the mantra "code to an abstraction, not a concrete type"

Java.util.Calendar returning wrong Date object

Example: This was my scenario last night. A server in California has date/time of 'Mon Aug 18'. Current time in Indiana is 'Sun Aug 17'. I use Calendar.getInstance(TimeZone.getTimeZone("America/Indiana/Indianapolis")) to return a Calendar instance. I then call the getTime() method on that instance. It should return a Date object relating to that particular time zone. It will not. It defaults back to the server time. When I print out the Calendar instance everything is good, correct date, correct time,etc. WHY WON'T THE getTime() return the correct java.util.Date???
Following is the output was run today so the dates happened to be the same so focus on the Time. Output includes Server time, new Calendar values, and the Date returned by calendar instance getTime(). See that the Calendar is getting the correct Time.
SERVER DATE=Mon Aug 18 15:52:13 CEST 2003
CALENDAR INSTANCE=java.util.GregorianCalendar[time=1061214732975,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="America/Indiana/Indianapolis",offset=-18000000,dstSavings=0,useDaylight=false,transitions=35,lastRule=null],firstDayOfWeek=2,minimalDaysInFirstWeek=1,ERA=1,YEAR=2003,MONTH=7,WEEK_OF_YEAR=34,WEEK_OF_MONTH=4,DAY_OF_MONTH=18,DAY_OF_YEAR=230,DAY_OF_WEEK=2,DAY_OF_WEEK_IN_MONTH=3,AM_PM=0,HOUR=8,HOUR_OF_DAY=8,MINUTE=52,SECOND=12,MILLISECOND=975,ZONE_OFFSET=-18000000,DST_OFFSET=0]
Date from getTime()=Mon Aug 18 15:52:12 CEST 2003

I got it worked with using DateFormat.parse !
The trick is to instantiate a new Date object as a result
of parsing out of 'localized' date string.
with below code :
Calendar localCal = new GregorianCalendar(TimeZone.getTimeZone("America/Los_Angeles"));
localCal.set(Calendar.DATE, 25);
localCal.set(Calendar.MONTH, 7);
localCal.set(Calendar.YEAR, 2003);
localCal.set(Calendar.HOUR_OF_DAY,6);
localCal.set(Calendar.MINUTE, 38);
localCal.set(Calendar.SECOND, 11);
Calendar sinCal = new GregorianCalendar(TimeZone.getTimeZone("Asia/Singapore"));
sinCal.setTimeInMillis(localCal.getTimeInMillis());
int date = sinCal.get(Calendar.DATE);
int month = sinCal.get(Calendar.MONTH);
int year = sinCal.get(Calendar.YEAR);
int hour = sinCal.get(Calendar.HOUR_OF_DAY);
int min = sinCal.get(Calendar.MINUTE);
int sec = sinCal.get(Calendar.SECOND);
String sinTimeString = date + "/" + month + "/" + year + " " + hour + ":" + min + ":" + sec;
System.out.println("VIDSUtil.hostToLocalTime : time string now in SIN time : " + sinTimeString);
java.util.Date sinTime = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss").parse(sinTimeString);
System.out.println("time in SIN using Date.toString(): " + sinTime.toString());
It prints out :
VIDSUtil.hostToLocalTime : time string now in SIN time : 25/7/2003 21:38:11
time in SIN using Date.toString(): Fri Jul 25 21:38:11 PDT 2003
(Ignore the PDT, because Date.toString() defaults where the JVM is running)

Invoking stored procedure that returns array(oracle object type) as output

Hi,
We have stored procedures which returns arrays(oracle type) as an output, can anyone shed some light on how to map those arrays using JPA annotations? I tried using jdbcTypeName but i was getting wrong type or argument error, your help is very much appreciated. Below is the code snippet.
JPA Class:
import java.io.Serializable;
import java.sql.Array;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.Id;
import org.eclipse.persistence.annotations.Direction;
import org.eclipse.persistence.annotations.NamedStoredProcedureQuery;
import org.eclipse.persistence.annotations.StoredProcedureParameter;
* The persistent class for the MessagePublish database table.
@Entity
@NamedStoredProcedureQuery(name="GetTeamMembersDetails",
     procedureName="team_emp_maintenance_pkg.get_user_team_roles",
     resultClass=TeamMembersDetails.class,
     returnsResultSet=true,
     parameters={
     @StoredProcedureParameter(queryParameter="userId",name="I_USER_ID",direction=Direction.IN,type=Long.class),
     @StoredProcedureParameter(queryParameter="employeeId",name="I_EMPLOYEEID",direction=Direction.IN,type=Long.class),
     @StoredProcedureParameter(queryParameter="TEAMMEMBERSDETAILSOT",name="O_TEAM_ROLES",direction=Direction.OUT,jdbcTypeName="OBJ_TEAM_ROLES"),
     @StoredProcedureParameter(queryParameter="debugMode",name="I_DEBUGMODE",direction=Direction.IN,type=Long.class)
public class TeamMembersDetails implements Serializable {
     private static final long serialVersionUID = 1L;
@Id
     private long userId;
     private List<TeamMembersDetailsOT> teamMembersDetailsOT;
     public void setTeamMembersDetailsOT(List<TeamMembersDetailsOT> teamMembersDetailsOT) {
          this.teamMembersDetailsOT = teamMembersDetailsOT;
     public List<TeamMembersDetailsOT> getTeamMembersDetailsOT() {
          return teamMembersDetailsOT;
Procedure
PROCEDURE get_user_team_roles (
i_user_id IN ue_user.user_id%TYPE
, o_team_roles OUT OBJ_TEAM_ROLES_ARRAY
, i_debugmode IN NUMBER :=0)
AS
OBJ_TEAM_ROLES_ARRAY contains create or replace TYPE OBJ_TEAM_ROLES_ARRAY AS TABLE OF OBJ_TEAM_ROLES;
TeamMembersDetailsOT contains the same attributes defined in the OBJ_TEAM_ROLES.

A few things.
You are not using a JDBC Array type in your procedure, you are using a PLSQL TABLE type. An Array type would be a VARRAY in Oracle. EclipseLink supports both VARRAY and TABLE types, but TABLE types are more complex as Oracle JDBC does not support them, they must be wrapped in a corresponding VARRAY type. I assume your OBJ_TEAM_ROLES is also not an OBJECT TYPE but a PLSQL RECORD type, this has the same issue.
Your procedure does not return a result set, so "returnsResultSet=true" should be "returnsResultSet=false".
In general I would recommend you change your stored procedure to just return a select from a table using an OUT CURSOR, that is the easiest way to return data from an Oracle stored procedure.
If you must use the PLSQL types, then you will need to create wrapper VARRAY and OBJECT TYPEs. In EclipseLink you must use a PLSQLStoredProcedureCall to access these using the code API, there is not annotation support. Or you could create your own wrapper stored procedure that converts the PLSQL types to OBJECT TYPEs, and call the wrapper stored procedure.
To map to Oracle VARRAY and OBJECT TYPEs the JDBC Array and Struct types are used, these are supported using EclipseLink ObjectRelationalDataTypeDescriptor and mappings. These must be defined through the code API, as there is currently no annotation support.
I could not find any good examples or doc on this, your best source of example is the EclipseLink test cases in SVN,
http://dev.eclipse.org/svnroot/rt/org.eclipse.persistence/trunk/foundation/eclipselink.core.test/src/org/eclipse/persistence/testing/tests/plsql/
http://dev.eclipse.org/svnroot/rt/org.eclipse.persistence/trunk/foundation/eclipselink.core.test/src/org/eclipse/persistence/testing/tests/customsqlstoredprocedures/
James : http://www.eclipselink.org

How to cope with "undefined is not an object" ?

I'm tiptoeing towards a solution, but stepped on a thumbtack:
The following snippet creates an error in the function GetTplParams
var template = "DDD-BibFM-tpl.fm"; // located in script-dir var outFile = "DDD-BibFM.fm"; // located in the source dir oDoc = OpenTemplate (); alert ("Is template open now?"); function OpenTemplate () { var tplDir, tplFile, openParams, openReturnParams, oFile; tplFile = "E:\\_DDDprojects\\FM+EN-escript\\escript\\DDD-BibFM-tpl.fm" // SimpleOpen does not take the tplFile, but opens the dir of the active document // oFile = SimpleOpen (tplFile, true); openParams = GetTplParams (); openReturnParams = new PropVals(); oFile = Open (tplFile, openParams, openReturnParams); return oFile; } function GetTplParams() { // =>>> "undefined is not an object" on line 22 var params, i; // Change the params i = GetPropIndex(params, Constants.FS_RefFileNotFound); params[i].propVal.ival = Constants.FV_AllowAllRefFilesUnFindable; i = GetPropIndex(params, Constants.FS_FileIsOldVersion); params[i].propVal.ival = Constants.FV_DoOK; i = GetPropIndex(params, Constants.FS_FontNotFoundInDoc); params[i].propVal.ival = Constants.FV_DoOK; i = GetPropIndex(params, Constants.FS_LockCantBeReset); params[i].propVal.ival = Constants.FV_DoOK; i = GetPropIndex(params, Constants.FS_FileIsInUse); params[i].propVal.ival = Constants.FV_OpenViewOnly; i = GetPropIndex(params,Constants.FS_AlertUserAboutFailure); params[i].propVal.ival=Constants.FV_DoCancel; /* i = GetPropIndex(params,Constants.FS_MakeVisible ); params[i].propVal.ival=false; */ return (params); }
(inserting JS code really has its quirks in this editor).

Thanks Klaus - now it works!
To Rick.
The presented piece of code is part of a 're-furbishing' the FameMaker to EndNote 'connection.
In a first step I collect temporary citations (such as [Daube, 1969, #123] ) from text, footnotes and tables into an array. This part already works fine (I had to postpone further development for a year now...).
Then I write this data to a new document (which is created from the template - this is where the mentioned piece comes into play.
This file then is saved as rtf to be worked off by the bibliographic application EndNote (or Citavi in another case) to resolve the temporary citation into formatted citations and the bibliography.
After that the modified rtf is read in FM and the temp. citations in the FM-document/book are replaced by the formatted citations.
The user then copies the bibliography (as text only) into his appropriate chapter/section and formats it to his liking.

First operand of . is not an object, so cannot access member WriteLine

1) I get error like
First operand of . is not an object, so cannot access member WriteLine. (180,235) Z_REM_STRING.Z_FUNCLIB_FORMULA.FieldFormula Name:RemoveSpace PCPC:691 Statement:11
2) I have the record called Z_REM_STRING and have one field call FUNCLIB_FORMULA.FieldFormula
3) the function inside the FieldFormula is
Function RemoveSpace(&inputString As string) Returns string;
some log
Return &temp;
End-Function;
the code inside the function is work fine inside the AE
what mistake that I made?

Hi
The part where you have "some log" you have not declared the file.
Try something like:
Local File &myFileVar = GetFile("C:\temp\myLogFile.log","W",%Filepath_Absolute);
where &myFileVar is the file variable you use for the writeline.
Kind regards
André

ORA-22806: not an object or REF on the reserved word FROM, how to debug?

I am honestly confused on this one...
When I run the following in sqlplus:
SQL> SELECT a.fname, a.lname
FROM h_user_m a
WHERE a.id IN
(SELECT UNIQUE m.user_id
FROM h_user_role m
WHERE m.role_id =
(SELECT UNIQUE id
FROM h_role_n
WHERE LOWER (name) = 'wc-ismp-admin')
OR m.role_id =
(SELECT UNIQUE id
FROM h_role_n
WHERE LOWER (name) = 'wc-ismp-user'))
AND a.id NOT IN (SELECT user_id
FROM ip_user);
ERROR at line 2:
ORA-22806: not an object or REF
I run the same query in Toad for Oracle v9.7.2.5 and it returns the same error, but highlights the reserved word FROM. I googled the error, but I'm not for sure why the reserved word FROM would be causing the error?

Thank you for the quick response.
I tried your query and I still receive the same 'ORA-22806: not an object or REF' error & in Toad, it does highlight the reserved word FROM.
Oddly enough, I went back and ran the first sub-query from both of our SQL statements and no errors returned.
Only when I added the sub-query back to the main query I receive the error as mentioned.
So, the following worked:
select m.user_id
from h_user_role m
where m.role_id in
(select id
from h_role_n
where lower (name) = 'wc-ismp-admin'
or lower (name) = 'wc-ismp-user'
minus
select user_id
from ip_user)
but added back to:
select a.fname, a.lname
from h_user_m a
where a.id in(...)
The error returns - the same steps apply to my statement as well...
Looking at the 10g Release 2 (10.2) documents, I don't see any restrictions to the IN reserved word, in terms of number of sub-queries, etc...

Function that returns a valid object name

Hello,
I heard there was a new function that would return a unique unused valid
object(table) name that could then be used to create an object
by that name, but I can not seem to find it in the documentation references.
What I want to do is to create tables, then drop them at a later date
without having to check if that name has been used already
or creating a sequence.
Any ideas?

You may be thinking of SYS_GUID which can be used to generate unique identifiers for objects, as in TYPEs. Not database objects like TABLEs. The SYS_GUID datatype is "the 32-character hexadecimal representation of the 16-byte RAW value of the global unique identifier". Consequently it is very likely to start with a digit and so is not valid as a table name.
You could generate a valid random name using something like this: 'A'||to_char(sysdate, 'YYMMDDHH24MISS'). If you want to create more than one per second you'll have to create a function that increments some global counter to ensure uniqueness. However, DDL like creating or dropping tables is a performance killer and not really something you want to do on the fly.
Cheers, APC

Factory pattern returning shared mutable objects

We have a non-EJB load-balanced environment of JSP/Business Objects
with JMS synchronized caches. Here's an overview.
Business objects stored in a custom in-process cache (one instance per JVM) and the caches are synchronized using JMS. The business objects are maintained through utility classes (not exactly factories) with the
following pseudo -code logic
public static Object getObject(Object id) {
try {
Get from cache...
} catch(.. e) {
load from database
put it in cache.
Currently we return the cached object "as-is" to the calling code. The objects being mutable this poses a risk of some JSP/bean inadvertently changing the cached copy. Although this is the fastest approach we have quickly realized that it is no longer safe.
I am unable to find good patterns that address this common problem. Most patterns I have seen are very EJB centric and some of them boil down to the pseudo-code I have shown above. Which is not
the solution but the problem itself!
Is there anyway I can return an immutable instance of our objects in a generic way?. I know the alternatives..
1) Clone. Create extra objects. It so happens the cached objects are actually shown in an end-user GUI tree on a web-page accessed by 200 concurrent users. cloning would create a copy per get call.
2) Create an immutable and mutable version of the class and return only
the immutable version. How do I ever get the mutable version with this approach
This seems like a fairly common problem and I was wondering if anybody has solved this a little more elegantly then what I have presented above.

2) Create an immutable and mutable version of the class and return onlythe immutable version. How do I ever get the mutable version with this approach
The setter use no modifier or with protected modifier, the getter use public modifier.
private String name;
public String getName() {
return name;
String setName(String name) {
this.name = name;
}When the class is used outside the package, it is immutable, but it become mutable if accessed from class within the same package.
This means, the cache manager class also need to be placed in the same package in order to gain mutable access.
rgds,
Alex

How to return array of object

public class A{
public class B{
publc C[] sample()
int i=0;
ResultSet rset = s.executeQuery("select name, id from emp ");
while(rs.next()){
name = rset.getString("nam");
id = rset.getInt("id");
c.setName(name )
c[i].setId(id)
return c[]
public class C{
// here i have getter and setter metod for name & id
When I try to return the object c[]..i am getting "cannot conver from C to C[]".
Can u pls help me, how to return array of object and how to get name and id values in other class using this array object
Thanks for ur help

public class Starting{
public long empID;
Data data = new Data();
Value[] value;
int count = 0;
     public static void executeDe(){
          value = new Value[100]
          try{
                 data.getDetails()
                 processDetails(value);
               }catch(Exception e){e.printStackTrace();}
     public static void processDetails(Value[] value){
     count = data.i;
          int i;
          for(i=0;i<count;i++){
              empID=value.getempID(); \\ here i am not getting all values..... am getting only last value of the array
public class Data{
public long empID;
public int i=0;
static Value[] value = new Value[100];
public static Value[] getDetails(){
Connection con=null;
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
con=DriverManager.getConnection("jdbc:oracle:thin:@" + hostname + ":1521:" + sid, user, password);
System.out.println(" conn " + con);
System.out.println("");
Statement s=con.createStatement();
try{
     ResultSet rset = s.executeQuery("select EMPID from Employee ");
     while(rset.next()){
empID = rset.getLong("EMPID");
value[i].setCycleID(cy_i);
i++;
     rset.close();
     con.close();
}catch (SQLException sqle){sqle.printStackTrace();}
     finally{
          try{
          s.close();
     con.close();
          }catch(SQLException e){e.printStackTrace();}
catch(Exception e){e.printStackTrace();}
return value;
     public class Value {
     public static long cycleID;
          public static void setempID(long empID) {
               Value.empID = empID;
          public static long getempID() {
               return empID;
This is my actual code..... I am able to set the values in Value class from Data class using getDetails() method, which is returning array of value object.
In Starting class, I am trying to get values using value[i].. i am getting last value of the array. This is my actual problem... here i want to get all values.
Please help me how to resolve this.

PowerShell: Possible to return a DataReader object from a function call

I have to interact with several different db's. I was wondering how I could use a common Function for the connection and commnad params and have it return a DatReader object that I then could evaluate?
Example: (psuedo-code)
Function SqlCmd(Db, instance, command) {... return <DataReader onject>}
$Datareader= SqlCmd Db instance command
if ($Datareader.HasRows) {..to something..}
Thanks
TR

Hi TR,
This is possible by using the Dot.Net Sql objects. Below is a small function which takes a connection string and a SQL query string and returns a DataReader object:
function
Get-SQLData()
param (
   [string]$sqlConnectionString,
   [string]$query
# Create a connection to the OLAP Database
$connection
=
New-Object
System.Data.SqlClient.SqlConnection
$sqlConnectionString
$connection.Open()
if (!$?)
{throw
"Could not open the connection."}
$command
=
New-Object
System.Data.SqlClient.sqlCommand
$query,
$connection
$dataReader
=
$command.ExecuteReader()
,$dataReader
The most important thing to note in this entire function in the comma in front of the $dataReader at the end of the function. As PowerShell implicitly tries to unpack collection objects, this comma forces the collection to
be returned intact allowing you to use it as required. So here is an example of usage:
$dr
=
Show-SQLData
$sqlConnectionString
$query
if ($dr.HasRows)
   while ($dr.Read())
"$($dr[0]) $($dr[1]) $($dr[2])"
Hope that helps!
Chris

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