Generic type doesn't support raw dataypes (int, boolean, etc.)?

It seems that Java 5 generics always autoboxes raw datatypes (int, double, boolean, ...) to the wrapper classes (Integer, Double, Boolean, ...), because when I use e.g. Integer.TYPE (instead of Integer.class), I got ClassCastExceptions. Is this non-support somewhere written down or is there a way to handle raw types without autoboxing them to their wrapper class?

I'm having some difficulty understanding your question, but my first suggestion is to see section 4.4 Type Variables of the Java Language Specification, which states: "If no bound is given for a type variable, Object is assumed."
Also, I think you mean "primivite" instead of "raw" types. Raw types are the "name of a generic type declaration used without any accompanying
actual type parameters" (sectoin 4.8 Raw Types).
Regards,
Nick

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Error : 'ResourceDictionary' root element is a generic type and requires a x:Class attribute to support the x:TypeArguments attribute specified on the root element tag.
Hi,
I get this error when i include some namespaces in my ResourceDictionary to specify a Style for a custom control.
Can anyone help me?
Thx
Stardusty

Hi,
That's the whole point. I don't want to use x:TypeArguments on a ResourceDictionary but the compiler says it needs it.
And i don't know why.
This code give no error:
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:sys="clr-namespaceystem;assembly=mscorlib">
</ResourceDictionary>
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<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:controls="clr-namespace:MyTime.View.Controls"
xmlns:converters="clr-namespace:MyTime.View.Converters"
xmlns:validationrules="clr-namespace:MyTime.View.ValidationRules"
xmlns:sys="clr-namespaceystem;assembly=mscorlib">
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[ANN] Java IDE with generic type support

Hello all!
We are proud to announce that we have just released version 5.0 of our Java IDE CodeGuide.
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- On-the-fly error checking of the whole project
- Code completion
- Usage search
- Refactoring (like Renaming, Class moving, etc.)
- and more...
A 30-day trial can be downloaded from our web page at
http://www.omnicore.com
Any feedback regarding JSR 14 support is much appreciated.
Best regards,
Dennis Strein
Omnicore Software

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Java5: Can't find a way to get rid of warnings about generic types

Hi all,
i have this method:
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        int j = list.size() - 1;
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            list.set(j - 1, list.get(j));
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    }I get 3 warnings. All about:
Type safety: The method add(Object) belongs to the raw type List. References to generic type List<E> should be parameterized
I can't find a way to rewrite this method (Java5), that i get no warnings compiling it and calling it with:
List<AnyClass> list = new ArrayList<AnyClass>();
list.add(new AnyClass());
AnyClass ac = new AnyClass();
insert(list, 0, ac);May be you know another way to insert an element to a List?
Thanks

Never tried it and do not have 5.0 installed to test
it, but what if you define the ArrayList as follows?
List<Object> list = new ArrayList<Object>();
That should get rid of the warnings.

Reference to generic type Set E should be parmeterized

I have the following code in a class:
1:Event theEvent = (Event) session.load(Event.class, eventId);
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Thanks
Sharma

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How to create an array with Generic type?

Hi,
I need to create a typed array T[] from an object array Object[]. This is due to legacy code integration with older collections.
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A simple implementation is just to cast the array and return, however this is not so safe.
What is interesting is that if I create ArrayList<String>, the debugger shows the type of the array in the list as String[].
If I create ArrayList<T>, the class contains Object[] and not T[].
I also triedT[] array = (T[]) Array.newInstance(T[].class.getComponentType(), objects.length);And a few other combinations. All work at runtime, create multiple compilation warnings, and none actually creates T[] array at runtime.
Maybe I am missing something, but Array.newInstace(...) is supposed to create a typed array, and I cannot see any clean way to pass Class<T> into it.T[].class.getComponentType()Returns something based on object and not on T, and T.class is not possible.
So is there anything really wrong here, or should I simply cast the array and live with the warnings?
Any help appreciated!

Ok. May be you could keep information about generic type in the your class:
public class Util {
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        int size = objects.length;
        T[] t = (T[]) java.lang.reflect.Array.newInstance(cls, size);
        System.arraycopy(objects, 0, t, 0, size);
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public class Sample<T> {
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Ehlpdhtm.js script error - Object doesn't support property or method 'Activate'

RH 9.0.2.271
Windows 7 64-bit
This "Object doesn't support property or method 'Activate' ehlpdhtm.js error all of a sudden started popping up when I view any of the chms I build from my file system.
I initially through it was a 64-bit problem because if I view the chm from my file system I get the script error. But if I copy it to a 32-bit PC or run it from within RH (after it's compiled for example) or a 32-bit version of our software, it runs fine. (However, one of my co-workers tried it on her 64-bit machine and didn't receive any error.) In any case, it seems to be happening on my machine only.
Anyway, it's not on every topic, but on every one that calls the ehlpdhtm.js script with this line of code, it appears to be happening:
<script src="ehlpdhtm.js" type="text/javascript" language="JavaScript1.2"></script>
I don't think hhactivex.dll plays with this js at all, but just in case, I unregistred and re-registered that dll to no effect. I also tried explicitly adding in ehlpdhtm.js as a baggage file. Again, to no effect.
What could have changed on my system to make this start happening? And any ideas on how to fix it?

Well here's some more info I found out. If I unregister the 64-bit hhactivex.dll the script error goes away. Of course my Glossary tab is grayed out as shown below, so that's not really an option:
Reregistering the 64-bit hhactivex.dll again shows the script errors. Plus, if I then go to my glossary it's completely empty as shown here:
If I copy this help down into a 32-bit machine everything works: the glossary has glossary terms, there's no script errors.
In short, I don't know what's going on, but the script error I'm getting is somehow related to having the 64-bit dll registered.

Import from database an internal table with generic Type : Web Dynpro ABAP

Hi everyone,
i have a requirement in which i'm asked to transfer data flow between two frameworks, from WD Component to another. The problem is that i have to transfer internal tables with generic types. i used the import/ export from database approache but in that way i get an error message saying "Object references and data references not yet supported".
Here is my code to extract a generic internal table from memory.
    DATA l_table_f4 TYPE TABLE OF REF TO data.
FIELD-SYMBOLS: <l_table_f4> TYPE STANDARD TABLE.
DATA lo_componentcontroller TYPE REF TO ig_componentcontroller .
DATA: ls_indx TYPE indx.
lo_componentcontroller =   wd_this->get_componentcontroller_ctr( ).
lo_componentcontroller->fire_vh_search_action_evt( ).
ASSIGN l_table_f4 TO <l_table_f4>.
*-- Import table for Help F4
IMPORT l_table_f4 TO <l_table_f4> FROM DATABASE indx(v1) TO ls_indx ID 'table_help_f4_ID'.
The error message is desplayed when last instruction is executed " IMPORT l_table_f4...".
I saw another post facing the same problem but never solved "Generic Type for import Database".
Please can anyone help ?
Thanks & Kind regards.

hi KIan,
go:
general type
TYPE : BEGIN OF ty_itab,
           field1 TYPE ztab-field1,
           field2 TYPE ztab-field2,
*your own fields here:
           field TYPE i,
           field(30) TYPE c,
           END OF ty_itab.
work area
DATA : gw_itab TYPE ty_itab.
internal table
DATA : gt_itab TYPE TABLE OF ty_itab.
hope this helps
ec

Weblogic Pool Driver doesn't support XA driver

          I am trying to set up a JDBC Strore for a JMS Server. The JDBC Store uses the Oracle
          XA driver (oracle.jdbc.xa.client.OracleXADataSource). However whaen the JMS server
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          store failed to open java.io.IOException: JMS JDBC store, connection pool = <jmsTestJdbcConnectionPool>,
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          Driver doesn't support XA driver, Please change your config to use a Non-XA driver
          <     at weblogic.jdbc.common.internal.JDBCUtil.wrapAndThrowResourceException(JDBCUtil.java:160)
          <     at weblogic.jdbc.pool.Driver.connect(Driver.java:156)
          <     at weblogic.jms.store.JDBCIOStream.checkDbmsType(JDBCIOStream.java:1490)
          <     at weblogic.jms.store.JDBCIOStream.open(JDBCIOStream.java:420)
          <     at weblogic.jms.store.JMSStore.open(JMSStore.java:224)
          <     at weblogic.jms.backend.BEStore.open(BEStore.java:262)
          <     at weblogic.jms.backend.BEStore.start(BEStore.java:151)
          <     at weblogic.jms.backend.BackEnd.openStores(BackEnd.java:1171)
          <     at weblogic.jms.backend.BackEnd.resume(BackEnd.java:1290)
          <     at weblogic.jms.JMSService.addJMSServer(JMSService.java:2241)
          <     at weblogic.jms.JMSService.addDeployment(JMSService.java:2012)
          <     at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:330)
          <     at weblogic.management.mbeans.custom.DeploymentTarget.addDeployments(DeploymentTarget.java:590)
          <     at weblogic.management.mbeans.custom.DeploymentTarget.updateServerDeployments(DeploymentTarget.java:568)
          <     at weblogic.management.mbeans.custom.DeploymentTarget.updateDeployments(DeploymentTarget.java:240)
          <     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          <     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          <     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          <     at java.lang.reflect.Method.invoke(Method.java:324)
          <     at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.java:711)
          <     at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:690)
          <     at weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:476)
          <     at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1557)
          <     at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1525)
          <     at weblogic.management.internal.RemoteMBeanServerImpl.private_invoke(RemoteMBeanServerImpl.java:947)
          <     at weblogic.management.internal.RemoteMBeanServerImpl.invoke(RemoteMBeanServerImpl.java:908)
          <     at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:946)
          <     at weblogic.management.internal.MBeanProxy.invokeForCachingStub(MBeanProxy.java:481)
          <     at weblogic.management.configuration.ServerMBean_Stub.updateDeployments(ServerMBean_Stub.java:7271)
          <     at weblogic.management.deploy.slave.SlaveDeployer.updateServerDeployments(SlaveDeployer.java:1210)
          <     at weblogic.management.deploy.slave.SlaveDeployer.resume(SlaveDeployer.java:362)
          <     at weblogic.management.deploy.DeploymentManagerServerLifeCycleImpl.resume(DeploymentManagerServerLifeCycleImpl.java:229)
          <     at weblogic.t3.srvr.SubsystemManager.resume(SubsystemManager.java:131)
          <     at weblogic.t3.srvr.T3Srvr.resume(T3Srvr.java:964)
          <     at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:359)
          <     at weblogic.Server.main(Server.java:32)


          It appears that WebLogic 8.1 does not have the "user transactions enabled" flag
          for a connection factory. I see references to this flag in earlier versions of
          WebLogic. The closest thing in WL 8.1 seems to be the "XA Connection Factory Enabled"
          flag.
          Tom Barnes <[email protected]> wrote:
          >Actually, all you normally need to check is "user transactions enabled".
          >The XA versions of the javax.jms interfaces (which are generated
          >via XA connection factories) are not required - except
          >that I think that MDBs make a check for this.
          >
          >Naresh Bhatia wrote:
          >> So I assume that the XA capability is enabled by checking the "XA Connection
          >Factory
          >> Enabled" checkbox for the JMS connection factory.
          >>
          >> Thanks.
          >> Naresh
          >>
          >> Tom Barnes <[email protected]> wrote:
          >>
          >>>Just use a non-XA driver and non-XA pool for JMS JDBC stores.
          >>>WL JMS' XA capability does not come from its JDBC driver.
          >>>
          >>>Naresh Bhatia wrote:
          >>>
          >>>
          >>>>I am trying to set up a JDBC Strore for a JMS Server. The JDBC Store
          >>>
          >>>uses the Oracle
          >>>
          >>>>XA driver (oracle.jdbc.xa.client.OracleXADataSource). However whaen
          >>>
          >>>the JMS server
          >>>
          >>>>starts it gives me the following exception: Weblogic Pool Driver doesn't
          >>>
          >>>support
          >>>
          >>>>XA driver. Any idea what I am doing wrong? I am using WL 8.1 SP2.
          >THe
          >>>
          >>>full error
          >>>
          >>>>trace is shown below:
          >>>>
          >>>><Jan 15, 2004 3:05:09 PM EST> <Alert> <JMS> <BEA-040052> <JMSServer
          >>>
          >>>"jmsTestJmsServer1"
          >>>
          >>>>store failed to open java.io.IOException: JMS JDBC store, connection
          >>>
          >>>pool = <jmsTestJdbcConnectionPool>,
          >>>
          >>>>prefix = <JMS1>: cannot determine DBMS type
          >>>><java.sql.SQLException: Pool connect failed : java.lang.Exception:
          >>>
          >>>Weblogic Pool
          >>>
          >>>>Driver doesn't support XA driver, Please change your config to use
          >>>
          >>>a Non-XA driver
          >>>
          >>>><     at weblogic.jdbc.common.internal.JDBCUtil.wrapAndThrowResourceException(JDBCUtil.java:160)
          >>>><     at weblogic.jdbc.pool.Driver.connect(Driver.java:156)
          >>>><     at weblogic.jms.store.JDBCIOStream.checkDbmsType(JDBCIOStream.java:1490)
          >>>><     at weblogic.jms.store.JDBCIOStream.open(JDBCIOStream.java:420)
          >>>><     at weblogic.jms.store.JMSStore.open(JMSStore.java:224)
          >>>><     at weblogic.jms.backend.BEStore.open(BEStore.java:262)
          >>>><     at weblogic.jms.backend.BEStore.start(BEStore.java:151)
          >>>><     at weblogic.jms.backend.BackEnd.openStores(BackEnd.java:1171)
          >>>><     at weblogic.jms.backend.BackEnd.resume(BackEnd.java:1290)
          >>>><     at weblogic.jms.JMSService.addJMSServer(JMSService.java:2241)
          >>>><     at weblogic.jms.JMSService.addDeployment(JMSService.java:2012)
          >>>><     at weblogic.management.mbeans.custom.DeploymentTarget.addDeployment(DeploymentTarget.java:330)
          >>>><     at weblogic.management.mbeans.custom.DeploymentTarget.addDeployments(DeploymentTarget.java:590)
          >>>><     at weblogic.management.mbeans.custom.DeploymentTarget.updateServerDeployments(DeploymentTarget.java:568)
          >>>><     at weblogic.management.mbeans.custom.DeploymentTarget.updateDeployments(DeploymentTarget.java:240)
          >>>><     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          >>>><     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          >>>><     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          >>>><     at java.lang.reflect.Method.invoke(Method.java:324)
          >>>><     at weblogic.management.internal.DynamicMBeanImpl.invokeLocally(DynamicMBeanImpl.java:711)
          >>>><     at weblogic.management.internal.DynamicMBeanImpl.invoke(DynamicMBeanImpl.java:690)
          >>>><     at weblogic.management.internal.ConfigurationMBeanImpl.invoke(ConfigurationMBeanImpl.java:476)
          >>>><     at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1557)
          >>>><     at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1525)
          >>>><     at weblogic.management.internal.RemoteMBeanServerImpl.private_invoke(RemoteMBeanServerImpl.java:947)
          >>>><     at weblogic.management.internal.RemoteMBeanServerImpl.invoke(RemoteMBeanServerImpl.java:908)
          >>>><     at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:946)
          >>>><     at weblogic.management.internal.MBeanProxy.invokeForCachingStub(MBeanProxy.java:481)
          >>>><     at weblogic.management.configuration.ServerMBean_Stub.updateDeployments(ServerMBean_Stub.java:7271)
          >>>><     at weblogic.management.deploy.slave.SlaveDeployer.updateServerDeployments(SlaveDeployer.java:1210)
          >>>><     at weblogic.management.deploy.slave.SlaveDeployer.resume(SlaveDeployer.java:362)
          >>>><     at weblogic.management.deploy.DeploymentManagerServerLifeCycleImpl.resume(DeploymentManagerServerLifeCycleImpl.java:229)
          >>>><     at weblogic.t3.srvr.SubsystemManager.resume(SubsystemManager.java:131)
          >>>><     at weblogic.t3.srvr.T3Srvr.resume(T3Srvr.java:964)
          >>>><     at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:359)
          >>>><     at weblogic.Server.main(Server.java:32)
          >>>>
          >>>
          >>
          >

Generic type doesn't support raw dataypes (int, boolean, etc.)?

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