Generic accessories; should I b

So I was searching for some accessories for my Zen Vision M, and found some mighty cheap ones on eBay. They were being bundled in some lucrati've 8-3 item bundles for thirty dollars or less and being labeled as generic(non-OEM). They include A/V cables, wall and car chargers, skins or cases (silicone and hard crystal plastic), lanyards, LCD screen protector, FM transmitter, and a few other things.
http://cgi.ebay.com/0-items-Accessories-Bundle-for-Creative-Zen-Vision-m_W0QQitemZ702292338QQihZ007QQcategoryZ8653QQrdZQQ cmdZViewItem
Anyone had experiences with these? Worth the risk or am I being over-concerned on their reliability/quality.
A couple more questions; would anyone recommend going for direct-to-Zen plugin type accessories, ones that don't require the dongle? Do they hamper/help in any way? Also what kind of case do you guys perfer; silicone skin types, hard crystal types, or leather? I'm looking for something not to bulky, but protects well and has belt/arm clip ability.
Thanks for any respones.
-ChadMessage Edited by thepassionofcha on 06-7-200706:53 PM

...i havent any experience with the vision m...
...but i wouldnt chance it...
...i just wouldnt...

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System Information
Server Details
Server Product
ColdFusion
Version
9,0,0,251028
Edition
Developer
Operating System
Windows 7
OS Version
6.1
Adobe Driver Version
4.0 (Build 0005)
JVM Details
Java Version
1.6.0_14
Java Vendor
Sun Microsystems Inc.
Java Vendor URL
http://java.sun.com/
Java Home
C:\ColdFusion9\runtime\jre
Java File Encoding
Cp1252
Java Default Locale
en_GB
File Separator
Path Separator
Line Separator
Chr(13)
User Name
XXXX
User Home
C:\
User Dir
C:\ColdFusion9\runtime\bin
Java VM Specification Version
1.0
Java VM Specification Vendor
Sun Microsystems Inc.
Java VM Specification Name
Java Virtual Machine Specification
Java VM Version
14.0-b16
Java VM Vendor
Sun Microsystems Inc.
Java VM Name
Java HotSpot(TM) Server VM
Java Specification Version
1.6
Java Specification Vendor
Sun Microsystems Inc.
Java Specification Name
Java Platform API Specification
Java Class Version
50.0
CF Server Java Class Path
;C:/ColdFusion9/runtime/../lib/activation.jar; C:/ColdFusion9/runtime/../lib/ant-launcher.jar; C:/ColdFusion9/runtime/../lib/ant.jar; C:/ColdFusion9/runtime/../lib/antlr-2.7.6.jar; C:/ColdFusion9/runtime/../lib/apache-solr-core.jar; C:/ColdFusion9/runtime/../lib/apache-solr-solrj.jar; C:/ColdFusion9/runtime/../lib/asn1.jar; C:/ColdFusion9/runtime/../lib/axis.jar; C:/ColdFusion9/runtime/../lib/backport-util-concurrent.jar; C:/ColdFusion9/runtime/../lib/bcel.jar; C:/ColdFusion9/runtime/../lib/bcmail-jdk14-139.jar; C:/ColdFusion9/runtime/../lib/bcprov-jdk14-139.jar; C:/ColdFusion9/runtime/../lib/cdo.jar; C:/ColdFusion9/runtime/../lib/cdohost.jar; C:/ColdFusion9/runtime/../lib/certj.jar; C:/ColdFusion9/runtime/../lib/cf-acrobat.jar; C:/ColdFusion9/runtime/../lib/cf-assembler.jar; C:/ColdFusion9/runtime/../lib/cf-logging.jar; C:/ColdFusion9/runtime/../lib/cf4was.jar; C:/ColdFusion9/runtime/../lib/cf4was_ae.jar; C:/ColdFusion9/runtime/../lib/cfusion-req.jar; C:/ColdFusion9/runtime/../lib/cfusion.jar; 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C:/ColdFusion9/runtime/../lib/xmlbeans-2.3.0.jar; C:/ColdFusion9/runtime/../lib/xmpcore.jar; C:/ColdFusion9/runtime/../lib/xsdlib.jar; C:/ColdFusion9/runtime/../lib/; C:/ColdFusion9/runtime/../gateway/lib/examples.jar; C:/ColdFusion9/runtime/../gateway/lib/; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/batik-awt-util.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/batik-css.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/batik-ext.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/batik-transcoder.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/batik-util.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/commons-discovery.jar;   C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/commons-logging.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/concurrent.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/flex.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/jakarta-oro-2.0.7.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/jcert.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/jnet.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/jsse.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/oscache.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/cfform/jars/; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/flex/jars/cfgatewayadapter.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/flex/jars/concurrent.jar; C:/ColdFusion9/runtime/../wwwroot/WEB-INF/flex/jars/;
Java Class Path
C:\ColdFusion9\runtime\servers\lib;
C:\ColdFusion9\runtime\servers\lib\jrun-patch.jar;
C:\ColdFusion9\runtime\..\lib\macromedia_drivers.jar;
C:\ColdFusion9\runtime\lib\cfmx_mbean.jar;
C:\ColdFusion9\runtime\..\lib\oosdk\classes;
C:\ColdFusion9\runtime\..\lib\oosdk\lib;
C:\ColdFusion9\runtime\..\lib\oosdk\lib\juh.jar;
C:\ColdFusion9\runtime\..\lib\oosdk\lib\jurt.jar;
C:\ColdFusion9\runtime\..\lib\oosdk\lib\ridl.jar;
C:\ColdFusion9\runtime\..\lib\oosdk\lib\unoil.jar;
C:\ColdFusion9\runtime\lib;
C:\ColdFusion9\runtime\lib\cfmx_mbean.jar;
C:\ColdFusion9\runtime\lib\instutil.jar;
C:\ColdFusion9\runtime\lib\java2wsdl.jar;
C:\ColdFusion9\runtime\lib\jrun-ant-tasks.jar;
C:\ColdFusion9\runtime\lib\jrun-xdoclet.jar;
C:\ColdFusion9\runtime\lib\jrun.jar;
C:\ColdFusion9\runtime\lib\jspc.jar;
C:\ColdFusion9\runtime\lib\migrate.jar;
C:\ColdFusion9\runtime\lib\oem-xdoclet.jar;
C:\ColdFusion9\runtime\lib\sniffer.jar;
C:\ColdFusion9\runtime\lib\webservices.jar;
C:\ColdFusion9\runtime\lib\wsconfig.jar;
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Covariant return types over Generic return types.

Feeling rather slow on the uptake having only just discovered covariant return types (thanks again cowwoc), I've been looking over one of our soon to be released APIs and think using covariants makes muchos sense for it but there's one issue:
public interface Foo {
     Foo get();
public interface Bar {
     Bar get();
public interface FooBar
          extends Foo, Bar {
     FooBar get();
}Which isn't allowed, as the compiler states the return types are incompatible (I think incorrectly as it's been further overridden). Its generic equivalent is:
public interface FooX<T> {
     T get();
public interface BarX<T> {
     T get();
public interface FooBarX
          extends FooX<FooBarX>, BarX<FooBarX> {
     FooBarX get();
}Which works, and well, but the extra hassle of declaring/using generics is turning out to be a pain for our users (this pattern is used extensively). Does anyone have any simple suggestions/recommendations to resolve either the covariant issue or simplify the generics one? Also does anyone have any preferences to which one they prefer (and why)?
Incidentally does anyone know the the rationale behind not allowing the first example, when clearly it can't be abused (can it)?

BobDavies wrote:
. it is because you can not override a method or its definition with the same signatur, which does not include return type.What do you mean "does not include return type"?
method signature does not count the return type. i think java does allow you to repeat definitions in a sub class but when you put up a different retyrn type, it sees it as an attempt to do overriding, so it flags it out.
the fact that it works is becuase you are not extending anything but itsself:I am aware of the reasons for the Generic version working, it achieves our aim, I just don't like it when in use. And was wondering why the joining covariants do not work. I still can't see the reason for the FooBar not being allowed when you are allowed to return subtypes. You cannot break the inheritance/return types expectations like this can you? E.g. if I write a bit of code using Foo, it will still work with FooBar, and the same with Bar using FooBar, no? Can you show me an example of why this isn't allowed?your generic version should NOT work either; it is working becuase you are confused:
public interface FooBarX extends FooX<FooBarX>, BarX<FooBarX> only equals to
public interface FooBarX extends FooBarX, FooBarX

Generics in static fields

Hi, I am trying to make a class which has some generic fields. I understand that it would not work just like that as the compiler has no way what the generic fields should actually be in a static context.
I want to use the generic class as an abstract class which would be extended, so that way the generics should be resolvable. Is there any way to make this work this way or should I not use generics and go type unsafe?
This is what I want to do in code:
abstract class ClassToBeExtended<A>
     static A a;
class UsingTheOther extends ClassToBeExtended<String> {}

It is supposed to be a class that adds relations between other classes:
// Simplified
class RelationBetweenAandB extends TheClass<A, B> {}
class SomeOtherClass
void foo()
    A a = new A();
    B b1 = new B();
    B b2 = new B();
    RelationBetweenAandB.add(a, b1);
    RelationBetweenAandB.add(a, b2);
    new YetAnotherClass().listRelationsOf(a);
class YetAnotherClass
public void listRelationsOf(A a)
      for (B b : RelationBetweenAandB.allRhs(a))
      ; // Iterate through b1 and b2
}Having static fields will make the relation useful from anywhere in the application, if it is not static then all the objects that are going to be used in a relation have to instantiate the class which wlll probably introduce a lot of overhead.
abstract class SomeClass<A extends OtherClass>
static OtherClass a;
} Would require me to have Object in stead of OtherClass because I want all types of object to be in a relation, which is what I meant by going type unsafe :)
Message was edited by:
SavageNLD
Added some more reasoning about why I want static fields

LO extraction VS Generic

Hi everyone, a general question as I'm new SAP BW world
which extraction method is used most in the market
2nd question is we use Generic to Extract data from two or more tables but I can also use generic for one table (I think not because that's why we have LO ?)
Let me know, thanks Dave

Hi..
in Application Specific there are two divison..
<b>Customer Generated Extractors and
BW Content Extractors in this LO COCKPIT</b>
Cross Application-----Generic Extractors.. in this we have db view ..info set and function module
Logistics Customizing Cockpit provides a simplified way to extract logistics data and transfer it to SAP Business Information Warehouse.
As shown in the figure the document data for various applications like Customer order, delivery and billing is first transferred to various Communication Structures.
These communication structures are used to form various extract structures in R/3 which consist of various DataSources like 2LIS_11_VAHDR, 2LIS_11_VAITM etc.
These DataSources then can be replicated to BW and assigned to Infosources.
Then by creating transfer rules and update rules and defining the transformation the data is loaded into various data targets like InfoCube and ODS, thus available for reporting.
There are four Update Modes in LO Extraction
Serialized V3 Update
Direct Delta
Queued Delta
Un-serialized V3 Update
Simple Handling
BW Customizing Cockpit: Central, single, maintenance tool for Logistics applications No LIS functionality: No knowledge of LIS Customizing update settings, etc, required
Function enhancement: Creating simply and without modifications
Others
Delta tables (SnnnBIW1/-2): duplicated update, duplicated data storage
Generic Extractors are Cross Application Extractors used in scenarios where the other type of extractors are unavailable.
Generic extractors are of three types:
Based on Database view/Table
Based on InfoSet
Based on Function Module
When should you use generic extractors should be used ...
Business Content does not contain a DataSource for your application.
The application does not feature its own generic delta extraction method
You are using your own programs in SAP R/3 to populate the tables
The tools for generic data extraction can be used to generate an extractor for all applications.
with regards,

Raw use of Generics

Something which makes me wonder: When I use own generic classes in a raw manner, I usually get the following warning:
Type safety: The method myMethod() belongs to the raw type Generic. References to generic type Generic<T> should be parameterizedWhen using generic classes from the JDK, e.g. List or Map, I do not get any warning. Where is the trick? :)
Is it possible to define or annotate methods of a class to not warn on raw usage? For example, when having a method in Generic<T>, that does not operate on T.
Thanks,
Stefan

Well, I did not think, that code would be necessary to understand my question. And after some testing in order to reply here, I think, I may have fallen for an eclipse bug. If so, please let me know :)
The following example might be semantically useless, but I wanted to point out my issue.
Say we have the following custom class:
public class Generic<T> {
     public int size() {
          return 0;
}And a testing class:
public class Test {
     public void testList(ArrayList aList) {
          aList.size();
     public void testGeneric(Generic aGeneric) {
          aGeneric.size();
}Now, in eclipse I get a warning for "aGeneric.size()" but none for "aList.size()". Although, in my opinion, each call operates on a raw type. Using javac from shell does not produce any warning, so it might be eclipse.
As a note: I know and appreciate warnings been thrown for generics. But in some cases, there is no need for warnings. For example, if a method's signature is independent of the generic's parametrization, hence the method is not "raw".
If Java 5 already does that, I have to blame eclipse and myself for not thoroughly testing out before posting. :)
Thanks,
Stefan

Java 5 generic does not work

In coding with java 5, I found I could not use Java 5 generic for all cases. For example, JAAS define a LoginModule interface as following
boolean abort()
boolean commit()
void initialize(Subject subject, CallbackHandler callbackHandler, Map<String,?> sharedState, Map<String,?> options)
Initialize this LoginModule.
boolean login()
boolean logout()
In initialize method, the login module should hold the reference to sharedState parameter and in its login method, the module put values into sharedState object to allow other login modules to share states. For example, If I would like to share password with other module, I should be able to do the following
sharedState.put("javax.security.auth.login.password", password);
But the java 5 compiler, says I can't put value into the sharedState map since ? is a wildtype.
Any one can tell me how to put values into the map Map<String, ?>.
Or If java has some good solution for this.
thanks in advance.
hao

minghao wrote:
I agree with you. If the semantics of java generic ? is not reworked, then the login module interface definition is not right.More precisely: if neither the semantics of ? nor the LoginModule interface is changed then the LoginModule interface doesn't make a lot of sense as it is.
But I think the semantics of java generic ? should be reworked.Why? Simply because a single interface is ill-designed?
If we changed the semantics of Map<String, ?> to allow .put() to be called, then a lot of code that depends on that semantics would break.
And if you want a Map from String to any object type, then simply use a Map<String, Object>. That's what it's there for.
It should loose some restrictiions if there's some type explicitly defined, such as Map<String, ?> if Key's type is explicitly defined, then the value could be added by using wildcard.I don't really get what you want. But I think you need to get a deeper understanding of generics. The two parameters of the Map interface (K and V, if I remember correctly) are completely unrelated.
You could give the same example with Collection<?>: It doesn't make any guarantees about the type it returns (i.e. it returns plain Objects) and doesn't accept any calls to add() because you can't possibly fullfil the type-requirements of the wildcard type.
Those are perfectly acceptable, fine and useful semantics. I see no need to change that.

Generic accessories; should I b

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