Set methods or typecasting objects with JAXB

Hi everybody,
I am working on an example with the JAXB, which in many ways is an extraordinary technology, but I have quite a problem.
I have compiled my schema with xjc - no problem, but i am missing to setMethods both of which is regarding a List. I've got
java.util.List getSparepart() and java.util.List getCategory() but am missing the two set methods and I don't understand why.
I have tried to solve the problem by defining the methods myself, which is allright right until the point where I use the methods.
Here is a snip of the code:
spTest.jaxb.CatalogType.VendorType vNowTemp = (spTest.jaxb.CatalogType.VendorType) objFactory.createCatalogTypeVendorType();
vNowTemp = vNow;
vNowTemp.setSparePartCategory(categoryResult);
vNowTemp = vNow;
result.add(vNowTemp);
The problem is that there seems to be no difference between vNow or vNowTemp at any point, which there should be.
I have tried to convert the java.util.List I get when I use getSparePart to a com.sun.xml.bind.util.ListImpl (which is the object type used within the classes JAXB's xjc produced) but this seems to be impossible.
Could any one help me on this one please
/Sebastian
[email protected]

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Hi everybody,
I am working on an example with the JAXB, which in
many ways is an extraordinary technology, but I have
quite a problem.
I have compiled my schema with xjc - no problem, but i
am missing to setMethods both of which is regarding a
List. I've got
java.util.List getSparepart() and java.util.List
getCategory() but am missing the two set methods and I
don't understand why.You don't need the SET methods for that. You can get to the list via the GET methods and then add/remove elements to/from it or empty/clear it. If you want to set an entirely different list, you could always use-
getSparePart().clear();
getSparePart().addAll(myNewList);
Hope this helps.

Methods of OLE-objects with IN OUT parameter

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How can I use methods of an object with private instantiation in my ABAP?

Hello all,
What is the work-around on using methods of an object marked as private instantiation? I tried to use concepts of INHERITANCE or FRIENDS of an object (BCONTACT in my case - a SAP standard object) but it did not work, or at least, I do not know how to properly code the statements in my ABAP program.
Any code samples, other ideas?
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I am closing this question as there has been no answer.
Message was edited by:
Goharjou ardavan

How to call setter Method of ActionScript class with in a Flex Application

Hi
I have Action class as shown :
public class MyClass
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public function get name():String {
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For example on entering some data in a TextInput and click of a submit Button , on to the Event Listener , i want to call the set name method of my ActionScript class .
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Thanks Gordon for your resonse .
Say for example my Action class is like this :
public class MyClass
private var name:String
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I know this way we can do it
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Can an arbitrary object be marshalled with JAXB?

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Getter/setter methods -- how do I use the return values

I'm just learning Java, and I haven't been to this site since the end of July, I think. I have a question regarding getter and setter methods. I switched to the book Head First Java after a poster here recommended it. I'm only about a hundred pages into the book, so the code I'm submitting here reflects that. It's the beginnings of a program I'd eventually like to complete that will take the entered information of my CD's and alphabetize them according to whatever criteria I (or any user for that matter) choose. I realize that this is just the very beginning, and I don't expect to have the complete program completed any time soon -- it's my long term goal, but I thought I could take what I'm learning in the book and put it to practical use as I go along (or at lest try to).
Yes I could have this already done it Excel, but where's the fun and challenge in that? :) Here's the code:
// This program allows the user to enter CD information - Artist name, album title, and year of release -- and then organizes it according the the user's choice according to the user's criteria -- either by artist name, then title, then year of release, or by any other order according to the user's choice.
//First, the class CDList is created, along with the necessary variables.
class CDList{
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 private int yearOfRelease;
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 public void setArtistName(String artist){
 artistName = artist;
 public void setAlbumTitle(String album){
 albumTitle = album;
 public void setYearOfRelease(int yor){
 yearOfRelease = yor;
 public void setLabel(String label){
 recordLabel = label;
 public String getArtistName(){
 return artistName;
 public String getAlbumTitle(){
 return albumTitle;
 public int getYearOfRelease(){
 return yearOfRelease;
 public String getLabel(){
 return recordLabel;
void printout () {
 System.out.println ("Artist Name: " + getArtistName());
 System.out.println ("Album Title: " + getAlbumTitle());
 System.out.println ("Year of Release: " + getYearOfRelease());
 System.out.println ("Record Label: " + getLabel());
 System.out.println ();
import static java.lang.System.out;
import java.util.Scanner;
class CDListTestDrive {
 public static void main( String[] args ) {
 Scanner s=new Scanner(System.in);
 CDList[] Record = new CDList[4];
 int x=0;
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 Record[x].setLabel(label);
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 x=x+1;//moves to next CDList object;
 x=0;
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 Record[x].getAlbumTitle();
 Record[x].getYearOfRelease();
 Record[x].getLabel();
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 x=x-1;
 Record[x].getArtistName();
 Record[x].getAlbumTitle();
 Record[x].getYearOfRelease();
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 }//end main
}//end class First, I'd like to ask anyone out there to see if I could have written this any more efficiently, with the understanding that I'm only one hundred pages into the book, and I've only gotten as far as getter and setter methods, instance variables, objects and methods. The scanner feature I got from another book, but I abandoned it in favor of HFJ.
Secondly --
I'm confused about getter and setter methods -- I'd like someone to explain to me what they are used for exactly and the difference between the two. I have a general idea, that getters get a result from the method and setters set or maybe assign a value to variable. I submitted this code on another site, and one of the responders told me I wasn't using the returned values from the getter methods (he also told me about using a constructor method, but I haven't got that far in the book yet.). The program compiles and runs fine, but I can't seem to figure out how I'm not using the returned values from the getter methods. Please help and if you can explain in 'beginners terms,' with any code examples you think are appropriate. It will be greatly appreciated.
By the way, I'm not a professional programmer -- I'm learning Java because of the intellectual exercise and the fun of it. So please keep that in mind as well.
Edited by: Straitsfan on Sep 29, 2009 2:03 PM

Straitsfan wrote:
First, I'd like to ask anyone out there to see if I could have written this any more efficiently, with the understanding that I'm only one hundred pages into the book, and I've only gotten as far as getter and setter methods, instance variables, objects and methods. The scanner feature I got from another book, but I abandoned it in favor of HFJ.Yes, there is tons you could have done more efficiently. But this is something every new programmer goes through, and I will not spoil the fun. You see, in 3 to 6 months when you have learned much more Java, assuming you stick with it, you will look back at this and be like "what the hell was I thinking" and then realize just haw far you have come. So enjoy that moment and don't spoil it now by asking for what could have been better/ more efficient. If it works it works, just be happy it works.
Straitsfan wrote:
Secondly --
I'm confused about getter and setter methods -- I'd like someone to explain to me what they are used for exactly and the difference between the two. I have a general idea, that getters get a result from the method and setters set or maybe assign a value to variable. I submitted this code on another site, and one of the responders told me I wasn't using the returned values from the getter methods (he also told me about using a constructor method, but I haven't got that far in the book yet.). The program compiles and runs fine, but I can't seem to figure out how I'm not using the returned values from the getter methods. Please help and if you can explain in 'beginners terms,' with any code examples you think are appropriate. It will be greatly appreciated.
By the way, I'm not a professional programmer -- I'm learning Java because of the intellectual exercise and the fun of it. So please keep that in mind as well.First, if you posted this somewhere else you should link to that post, it is good you at least said you did, but doubleposting is considered very rude because what inevitably happens in many cases is the responses are weighed against each other. So you are basically setting anyone up who responds to the post for a trap that could make them look bad when you double post.
You are setting you getters and setters up right as far as I can tell. Which tells me that I think you grasp that a getter lets another class get the variables data, and a setter lets another class set the data. One thing, be sure to use the full variable name so you should have setRecordLabel() and getRecodLabel() as opposed to setLabel() and getLabel(). Think about what happens if you go back and add a label field to the CDList class, bad things the way you have it currently. Sometimes shortcuts are not your friend.
And yes, you are using the getters all wrong since you are not saving off what they return, frankly I am suprised it compiles. It works because you don't really need to use the getters where you have them since the CDList Record (should be lowercase R by the way) object already knows the data and uses it in the printout() method. Basically what you are doing in lines like:
Record[x].getArtistName();is asking for the ArtistName in Record[x] and then getting the name and just dropping it on the floor. You need to store it in something if you want to keep it, like:
String artistName = Record[x].getArtistName();See how that works?
Hope this helped, keep up the good learning and good luck.
JSG

Custom tag - unable to find setter method error

I see this compileException on IAS but not on BEA app server and iWS.
JSPProvider.processJSPFile(): jsp=searchContent.jsp, org.apache.jasper.compiler.CompileException
Unable to find setter method for attribute: input
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Should both get and set methods have the same type of parameters or is this a due to a bug in the app server ?

I see this compileException on IAS but not on BEA app
server and iWS.
JSPProvider.processJSPFile(): jsp=searchContent.jsp,
org.apache.jasper.compiler.CompileException
Unable to find setter method for attribute: input
The reason is because the custom tag has a setInput()
that takes a String parameter while the getInput()
returns an InputStream.
Should both get and set methods have the same type of
parameters or is this a due to a bug in the app server
I was only going off info from the original post. The error specifically states "Unable to find setter method for attribute: input" with a lower case i for the input attribute. You also specifcally stated "The reason is because the custom tag has a setInput()" with a capital I for the setInput method. This would most definitely cause the error you were receiving. That is unless you corrected this between your original post and your followup testing.
Cliff

Sharing same entity object with multiple viewobject problem.

Dear All,
I have a common entity entity object, that i am using in 4 different vo(only the where clause is different),
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But when i do this with separate eo for each vo then it works fine..
Here i just want to do with the single eo being shared by different vo of same kind.. except where clause, Also i want to know why this issue is comming on insert? is it normal expected behaviour ? If yes then how to overcome this problem..? Pls provide any good suggestions if you have..
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Hi Sacha,
Thanks.. i read it and found following
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go with separate eo and vo..?
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How to call Apps Module Custom Method from Entity Object / View Object ?

Hi All,
I create a custom method in AppsModuleImpl.java. How can I call that custom method from a setter method on Entity Object / View Object ?
(I have tried to use Configuration.createRootApplicationModule(amDef,config); but it is not the correct way, is it? )
Below is my code :
The setter on MyEntityImpl.java :
public void setKodeprd(String value) {
setAttributeInternal(KODEPRD, value);
if (getProduct() != null) {
// CALL the getSalesPrice custom method from here, HOW ??
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Enforce setting private variable in subclass with abstract method

Hi,
Is this something that is common usage/practice?:
public abstract class Base {
 private int importantPrivateVariable = setImportantPrivateVariable();
 protected abstract int setImportantPrivateVariable();
}I would like to enforce the extender of the class to set a private variable, but as there is no abstract variable in java, I can only use a method for it.
Thanks,
lemonboston
Edit: the variable could be protected as well, I suppose this is not important here, but correct me if I am wrong

lemonboston wrote:
Hi,
Is this something that is common usage/practice?:I don't think that's so common, but that's code easily understandable. However there are several problems with this approach:
public abstract class Base {
private int importantPrivateVariable = setImportantPrivateVariable();
protected abstract int setImportantPrivateVariable();
}I would like to enforce the extender of the class to set a private variableThat's no what your code implements: your base class forces the subclasses to return an int value, and the Base class uses that value to assign it to the variable.
Therefore the method should be called get<Something> (e.g. <TT>getInitialValueOfImportantVariable()</TT>+ to have a naming consistent with its signature (it returns a value, whereas a regular setter method should declare a void return type: <TT>protected abstract void setImportantPrivateVariable(int someValue);</TT>).
Edit: the variable could be protected as well, I suppose this is not important here,Well, yes, this is "important" - at least, there a noticeable difference: the variable being private, the base class is free to handle it as it sees fit (e.g., assign the value at construction time and never modify it afterwards). If the variable was protected, the subclass could modify in ways and at times not known by the base class.
but correct me if I am wrongThere's a trap in this construct: the method is called in the variable initializer, that is, behind the scenes, approximately during the execution of the Base class constructor, so before the subclass constructor. So, you are calling a method on an object that is not fully initialized (e.g. some of its attributes may still be <TT>null</TT> at this stage). There is a rule that discourages such situations, that goes something like "don't call non-private and non-final methods from a constructor".
To avoid this trap, two options:
- require an int argument in the Base class's constructor , as was suggested above
- don't get and set the value of the important variable in the initializer or constructor code, but from a special method in the base class instead:
public abstract class Base {
 private int importantPrivateVariable; // default value is zero
// or alternatively:
// private int importantPrivateVariable = ...; // Some default value
 protected abstract int getImportantPrivateVariable();
 public void initializeImportantPrivateVariable() {
 importantPrivateVariable = getImportantPrivateVariable();
}That construct is a degenerate form of a common design pattern known under the name of Template Method (where a base class method calls generally several subclass methods in a specified order and with a specified chaining, leaving it to the subclass to implement the details of the methods).
The drawback is that the client code (the one that uses the Base instance) has to know when to call that initialization method, whereas the constructor-based initialization lets the client code free to not care at all.
Much luck,
J.

Can I call an object with synchronized methods from an EJB

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I've seen various statements such as you can't use read/write static fields in EJBs and you can't use synchronisation primitives in EJBs but I've also seen statements that say its okay to access utility classes such as Vector (which has synchronised methods) from an EJB.
Does anyone know if there is a definitive answer on this? What are the implications of accessing a shared object with synchronised methods from multiple EJBs? Is it just that the EJB's thread may block which limits the ability of the container to manage the EJBs? In the Vector example above (from Professional Java Server Programming) did they mean its okay to use these utility classes provided they aren't shared across threads?
If I can't use a plain old Java Object does anyone know if there are other potential solutions for sharing objects across EJBs?
In my problem, I have an operation that I want to run in a multi-threaded way. Each thread will add information to the shared object, and this info may be used by the other threads. There's no lengthy blocking as such other than the fact that only one thread can be adding/reading information from the shared object at a time.
I've trawled through this forum looking for similar questions of which there seem to be many, but there doesn't seem to be any definitive answers (sorry if there was and I missed it).
Thanks
Martin

You can share objects among EJB's or among objects used by one or more EJB's. You can use synchronization primitives - nothing will prevent you from doing that.
After all, the container classes, JVM-provides classes, JDBC, JCA, JNDI and other such classes do all of this with impunity. You can too. You can use file and socket I/O as well, presuming you configure the security profile to allow it. Should you? Well it depends on what you need to accomplish and if there is another practical alternative.
Yes the specification warns you not to, but you cannot be responsible for the interior hidden implementation of classes provided to you by the JVM or third parties so you can never truly know if your are breaking these written rules.
But when you do these things, you are taking over some part of the role of the container. For short running methods that only block while another thread is using the method or code block and no I/O or use of other potentially blocking operations are contained in the method/block, you will be fine. If you don't watch out and create deadlocks, you will harm the container and its managed thread pool.
You should not define EJB methods as synchronized.
Also, if you share objects between EJB's, you need to realize that the container is free to isolate pools of your EJB in separate classloaders or JVM's. It's behavior can be influenced by your packaging choices (use of .ear, multiple separate .jar's, etc.) and the configuration of the server esp. use of clustering. This will cause duplicate sets of shared classes - so singletons will not necessarily be singleton across the entire server/cluster, but no single EJB instance will see more than one of them. You design needs to be tolerant of that fact in order to work correctly.
This isn't the definitive answer you asked for - I'll leave that to the language/spec lawyers out there. But in my experience I have run across a number of occasions where I had to go outside of the written rules and ave yet to be burned for it.
Chuck

Set Java Object with Java Long Object from JNI

Hi,
i am getting crazy with the jni...
in Java i have the follwoing:
public class blabla{
Object myObject;
i chose Object cause the return value from native is not known
in case for a long value i handle it like this :
//get the Long class
jclass LongCls = env->FindClass("Ljava/lang/Long;");
jmethodID jmid = env->GetMethodID(LongCls, "<init>","(J)V");
//create an Long Object with the long return value
jobject LongObj = env->NewObject(LongCls,jmid,longreturnvalue);
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jfid = env->GetFieldID(jclazz, "myObject", "Ljava/lang/Object;");
env->SetObjectField( returnobjectofblabla,jfid,LongObj );
the long value is set fine in the Long Object but i cant set the Long Object with the SetObjectField method into the Object myObject.
Java is shown that the myObject contains a Long Object but the long value of the Long Object is totally wrong and doesnt equal to the long value which has been set.But setting the value works fine- any ideas or solutions?
Thank you!

charliess wrote:
sometimes i really wonder about the answers in this forum - until now i got not one answer that helps me, even i tried to write down the problem very detailed...
Sometimes I wonder about people who jump onto a site and immediately assume that
1. They are the most important person in the world
2. That they deserved the absolute undivided attention of absolute everyone.
3. That everyone should be absolutely polite to them and provide them with perfect answers.
4. Feel free to denigrate and posit their own opinion on everything while ignoring anything else that anyone else says.
5. Expect that everyone else should understand their poorly worded questions.
Myself I find such individuals extremely amusing. Although they seldom stick around long here. At least not under their original alias.
plaz tel me how to realise your error checking?example plz
You start by having at least a basic understanding of C/C++ and java.
Then you read the JNI documents, all of them, for each method that you are using.
Then you write code such that it actually reflects the documents. For example you check return types. And probably deal with the possibility that JNI methods might throw exceptions.
as far as i know the jni methods like getfieldids and so on throw exceptions other like stObject dont do that the just return nothing
i can see all exceptions in my Java console thats not the Problem, setting the Long Object does not throwing a exception btw->
Myself I wouldn't expect that a JNI exception would show in the java console. Could I suppose though.
However nothing so far would suggest that an exception is being thrown. That however doesn't alter the fact that you must still write the code such that it could happen.
is it possible in general to set an java Long Object created in C(native) into a Object type (Object) overgiven as parameter in my JNI function with the setObject method?
Is it possible that you could actually follow my previous request and create some code that actually runs instead of cut and pasting whatever you feel like?
plz answer also with code and examples i did the same for you...No you didn't. You posted something which would not compile and quite possibly doesn't represent your actual code at all.
And please note that we do not get paid to do this. If you want to pay someone to solve your problem then there are sites for that.
Paying someone allows you to make all sorts of demands. The more you pay the more people will put up with.
If you don't want to pay and do in fact want free answers then it will probably be in your interest to
1. Be polite
2. Answer the questions that have been asked of you.

Please help- How can I publish an object with irregular getter/setter metho

I'm encountering a problem with weblogic 9.2 web service. Here it is the description:
I have a java class which doesn't expose getter/setter method, Like this:
public class MyEntityList
implements Cloneable, Serializable
private Map subEntityMap;
public final Object[] toArray()
return subEntityMap.values().toArray();
public final Iterator subEntities()
return subEntityMap.values().iterator();
public final GFIBaseSubEntity getSubEntityByKey(String key)
if(key == null)
return null;
else
return (GFIBaseSubEntity)subEntityMap.get(key);
public final void setSubEntity(GFIBaseSubEntity entity)
subEntityMap.put(entity.getKey(), entity);
When I publish this object out, the web service engine will not parse the value in this object for it hasn't getter methods. But I do need the value in it, and I can't change the class for it's from external system. Can I define my own serializer class to process the MyEntityListin weblogic 9 or 10? Or is there any way to process this case?
Thanks in advance

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How do i set text in a object so that object expands with text and has even space on both sides of the object in illustrator cc?

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Set methods or typecasting objects with JAXB

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