Sub-class objects changing lovu2019s in XI 3.0
Hello all,
I have a XI 3.0 universe where I have several classes and sub-classes like this;
Class1
....Subclass1
.............Object 1
.............Object 2
.............Object 3
....Subclass2
.............Object 4
.............Object 5
.............Object 6
...Subclass3
.............Object 7
.............Object 8
.............Object 9
Class2
....Subclass1b
.............Object 10
.............Object 11
.............Object 12
While updating the objects lovu2019s (for sorting) in the properties window, Iu2019ve noticed that beginning with Object 4 that the lovu2019s are changing back to that of Object 1, this is also the case for Object 5 (changes to Object 2u2019s lov) all the way through Object 12. It seems that no mater how often I set and apply the sorted lov for all objects, they take on the settings of the objects in the first sub-class in my universe. When querys are ran from WebIntelligence, they display the correct SQL (and return no results as there is no data in my dev database as yet). Objects in other classes (not sub-classes) seem to be fine. Has anyone seen this type of behavior before?
Iu2019m thinking that I will need to go to 3.1 and suspect this may be a bug, any thoughts or comments are appreciated....
Hi Didier,
I did copy some some of the objects from a subclass to another, and to make sure this was not the issue, I re-created new ones and had the same issue. I was not aware that previous BOE versions (LOVs) had the issue though, which makes some sense.
At the moment, I'm suspecting this is a bug so I am asking the client to upgrade to 3.1 to see if the issue persist (I suspect it may), if so I will then open up a tech support case.
Thanks, Joe Szabo
Similar Messages
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Web Intelligence Sub Class Objects
Hi Experts,
By default, what data does the sub class object (blue object) display in a web intelligence document? Is it key, description etc. and is it possible to control what detailed object it displays as default. I know how to get the key and description from the detailed objects (green), but want to know what data the main object displays by default.
I am asking because we've created a large web intelligence document with lots of formulas that contain [L03 Profit Center] = " [key]". The users want to maintain the hierarchy text, which if the objects display text as default will break our formula and cause lots of work to correct with the new [L03 Profit Center Key] object.
Kind regards,
AndrewHi Andrew,
I am not sure but I guess it depends on the Info-object setting at the BW level because I have seen both Descriptions and Key
values being displayed from the Dimension (blue object).
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Instantiation of similar object over a super class deciding the sub class
Hello all
First, sorry if I'm duplicating an already answered question. I didn't searched very deep.
Initial position:
I have 2 Object (A1 and A2) which share the most (about 90%) of their instance variables an the associated methods. The values of the instance variables are retrieved in the real implementation from a stream. Depending of the data of the stream, I have to instantiate either a A1 or A2 object.
A test implementation (using an int in case of the stream):
The super class A:
package aaa;
public class A
protected int version = -1;
protected String name = null;
protected AE ae = null;
protected A()
protected A(int v)
// Pseudo code
if (v > 7)
return;
if (v % 2 == 1)
this.version = 1;
else
this.version = 2;
public final int getVersion()
return this.version;
public final String getName()
return this.name;
public final AE getAE()
return this.ae;
}The first sub class A1:
package aaa;
public final class A1 extends A
protected A1(int v)
this.version = v;
this.name = "A" + v;
this.ae = new AE(v);
}The second subclass A2:
package aaa;
import java.util.Date;
public final class A2 extends A
private long time = -1;
protected A2(int v)
this.version = v;
this.name = "A" + v;
this.time = new Date().getTime();
this.ae = new AE(v);
public final long getTime()
return this.time;
}Another class AE:
package aaa;
public class AE
protected int type = -1;
protected AE(int v)
// Pseudo code
if (v % 2 == 1)
this.type = 0;
else
this.type = 3;
public final int getType()
return this.type;
}To get a specific object, I use this class:
package aaa;
public final class AFactory
public AFactory()
public final Object createA(int p)
A a = new A(p);
int v = a.getVersion();
switch (v)
case 1:
return new A1(v);
case 2:
return new A2(v);
default:
return null;
}And at least, a class using this objects:
import aaa.*;
public final class R
public static void main(String[] args)
AFactory f = new AFactory();
Object o = null;
for (int i = 0; i < 10; i++)
System.out.println("===== Current Number is " + i + " =====");
o = f.createA(i);
if (o instanceof aaa.A)
A a = (A) o;
System.out.println("Class : " + a.getClass().getName());
System.out.println("Version : " + a.getVersion());
System.out.println("Name : " + a.getName());
System.out.println("AE-Type : " + a.getAE().getType());
if (o instanceof aaa.A2)
A2 a = (A2) o;
System.out.println("Time : " + a.getTime());
System.out.println();
Questions:
What would be a better way to encapsulate the logic into their respective objects ? Is there a way to let the super class A itself identify the type of the object and then extend from A to either A1 or A2 ?
Thanks in advance
AndreasHello jduprez
First, I would thank you very much for taking the time reviewing my problem.
Just for the record: have you considered regular serialization? If you control the software at both ends of the stream, you could rely on standard serialization mechanism to marshall the objects and unmarshall them automatically.In my case, I can't control the other site of the stream. At the end, the data comes from a FileInputStream and there aren't objects on the other site, only pur binary data.
- It seems you have one such factory class. Then you already have encapsulated the "determine class" logic, you don't need to add such logic in superclass A.I thought from an OO view, that the super class A is responsible of doing that, but that's where the problem starts. So at the end, it's better doing it in the factory class.
- A itself encapsulates the logic to load its own values from the stream.
- A1 and A2 can encapsulate the logic to load their own specific value from a stream (after the superclass' code has loaded the superclass' attributes values).
My advise would be along the lines of:
public class A {
.... // member variables
public void load(InputStream is) {
... // assign values to A's member variables
// from what is read from the stream.
public class A1 extends A {
... // A1-specific member variables
public void load(InputStream is) {
super.load(is);
// now read A1-specific values
public class AFactory {
public A createA(InputStream is) {
A instance;
switch (is.readFirstByte()) {
case A1_ID:
a = new A1();
break;
case A2_ID:
a = new A2();
break;
a.load(is);
}The example above assumes you have control over the layout of the data in the stream (here for a given A instance, the attributes defined in A are read first, then come the subclass-specific attributes.
The outcome is: you don't have to create a new A( ) to later create another instance, of a subclass.I like the idea. In the AFactory, is the "A instance;" read as "A a;" ?
Is there a way to let the super class A itself identify the type of the object and then extend from A to either A1 or A2 ?Note I initially read this question as "can an instance of a class mutate into another class", to which the answer is no (an object has one single, immutable class; it is an instance of this class, and of any superclass and superinterface, but won't change its class at runtime).Yes, I have been thinking about a way for mutating into a subclass to keep the already initialized values from the A class without copying or parsing again. But preventing an instance of an A class will be my way. So, in this aspect, Java didn't changed in the last 10 years... It's a long time ago I've used Java for some real projects.
You can, however, create an instance of another class, that copies the values off a priori A instance. Your example code was one way, another way could be to have a "copy constructor":
public class A {
public A(A model) {
this.att1 = model.att1;
this.att2 = model.att2;
public class A1 {
public A1(A model) {
super(model);
... // do whatever A1-specific business
)Still, I prefer my former solution less disturbing: I find the temporary A instance redundant and awkward.Nice to know. I prefer the first solution too.
Thank you again for the help and advices. My mind is searching sometimes for strange solutions, where the real is so close ;-)
Andreas -
Can we change the Super class attribute scope in Sub class
Hi.
I created a super class. In that i have 4 attributes. That attributes are PUBLIC.
I created a sub class. In that i got all super class attributes. I want to change that attributes as a Private. Is it possible.
If it is possible.Give me an Example with code or Pseudo code.
Regards.
Krishna.Hi Krishna,
It is not possible... If you declare the Attributes again in Subclass of the same name as that of Super class
then the way of accessing them would be different from that of attributes in the main class.
Hope this would help you
Good luck
Narin -
Casting timezone class object to Simpletimezone class object
When i try to cast timezone class object to a simpletimezone object it throws "java.lang.classcastexception" when i use J2re 1.4.2_06 while in J2re1.3 it works fine .
I am unable to understand this , can anybody help me out in this regard.
thanks
LokeshI agree with all
but try this out
SimpleTimeZone stz = (SimpleTimeZone)
ne) TimeZone.getTimeZone(id);Nothing in the specification says that
TimeZone.getTimeZone(id) returns an object that is a
SimpleTimeZone only that it is a TimeZone. It might
happen to also be a SimpleTimeZone but nothing in the
specifications says that it is.
Above statement throws classcast exception in
in jre1.4.2 but not in Jre1.3 and lower versions
........ remember TimeZone is base class and
SimpleTimeZone is sub class.If this is correct then in 1.3 it just happens to
return SimpleTimeZone object but nothing in the spec
says you can rely on this. You are relying on an
undocumented feature! Always a bad idea.
So wht has changed in the 2 runtimeenvironments.
Retorical?Hi,
sabre150 thanx a lot , u are right in earlier versions TimeZone.getTimeZone(id) was returning SimpleTimeZone object but in J2re 1.4.2 it returns sun.util.calendar.ZoneInfo object and hence the class cast exception was happening.
AND BELLYRIPPER , u were theoretically right , i was asking something that was happening in practical , so u better try out things and then come up with reasoning rather than just repeating theoretical things and expecting others to accept them blindly.
Anyway thanx a lot for the help. -
I have two classes in same package. I defined a class variable 'no_of_gear' and later changed its value. The changed value
works in the same class but does not work in sub-class in same package.
class ClassVar {
static int no_of_gear = 5;
public static void main(String[] args) {
System.out.println(no_of_gear); //Prints 5
ClassVar cv = new ClassVar();
System.out.println(cv.no_of_gear); //Prints 5
cv.no_of_gear = 8;
System.out.println(cv.no_of_gear); //Prints 8
System.out.println(no_of_gear); //Prints 8
}Here is sub-class in same package.
class ClassVarAcc extends ClassVar {
public static void main(String[] args) {
System.out.println(no_of_gear); //Prints 5
ClassVar cv = new ClassVar();
System.out.println(cv.no_of_gear); //Prints 5
}Java Tutorial by SUN reveals that if class variable is changed by one object it is changed for all objects of that class. But, my code does not support the statement. Please, Can you clarify it?Yes i do but not to the extent you are pointingto.
Why can't you just say you don't when you don't?
Can you answer in details?Look at your super class
class ClassVar {
static int no_of_gear = 5;
public static void main(String[] args) {
System.out.println(no_of_gear); //Prints 5
ClassVar cv = new ClassVar();
System.out.println(cv.no_of_gear); //Prints 5
cv.no_of_gear = 8;
System.out.println(cv.no_of_gear); //Prints 8
System.out.println(no_of_gear); //Prints 8
}In what method does the value of no_of_gear change?
Now look at the sub-class. Do you see yourself
calling this method?OH my dear. It is class variable that can be accessed directly (unlike instance variables) without the need of some method to change its value.
Here i change it. (Remeber: a copy of instance variable is passed to an instance of some class but no copy of class variable is passed to an instance of that class)
cv.no_of_gear = 8;
System.out.println(cv.no_of_gear); //Prints 8
Here it works fine.
System.out.println(no_of_gear); //Prints 8
But, why does not it work in sub-class? -
When subclass any object possible to do changes to the parent object and it automatically updated in the child object.
But once do any changes in the child object it won't effect to the parent object (This is obvious according to the concept)
But issue is from that point onwards, if do any changes to the parent object it wont effect to the child object.
Same scenario applicable when do sub classing thro object group as well.
Please clarify..
Rgds
shabarif do any changes to the parent object it wont effect to the child object.If you overwrite a property in the "child"-object, any changes at the "parent"-object on the same property will not be inherited any more. Changes on other property will still be inherited.
-
Problem with Dynamically accessing EJB Class objects in WL 7.0 SP1
I am trying to build a component which has the ability to instantiate and execute
an known EJB method on the fly.
I have managed to build the component but when I try and execute it I get a ClassNotFoundException.
I know that the EJB I am trying to invoke is deployed and available on the server,
as I can see it in the console, I also seen to have been able to get the remote
interface of the object, my problem occurs when I try and access the class object
so I can perform a create on the object and then execute my method
The code I have written is below:
private Object getRemoteObject(Context pCtx, String pJNDIName, String pHomeBean)
throws Exception {
String homeCreate = "create";
Class []homeCreateParam = { };
Object []homeCreateParamValues = {};
try {
//This call seems to work and doesn't throw an exception
Object home = pCtx.lookup(pJNDIName);
//However this call throws a java.lang.ClassNotFoundException
Class homeBean = Class.forName(pHomeBean);
Method homeCreateMethod = homeBean.getMethod(homeCreate,homeCreateParam);
return homeCreateMethod.invoke(home, homeCreateParamValues);
} catch (NamingException ne) {
logStandardErrorMessage("The client was unable to lookup the EJBHome.
Please make sure ");
logStandardErrorMessage("that you have deployed the ejb with the JNDI
name "+pJNDIName+" on the WebLogic server ");
throw ne;
} catch (Exception e) {
logStandardErrorMessage(e.toString());
throw e;
Any advice would be really appreciated, I'm fast running out of ideas, I suspect
it has something to do with the class loader but I'm not sure how to resolve it
Regards
Jo CorlessHello Joanne,
Congratulations! I'm very happy that you've managed to fix your problem. It's
always essential to understand how to package applications when deploying on BEA
WebLogic. Usually, by throwing everything into an EAR file solves just about all
the class loader problems. :-) Let us know if you have any further problems that
we can assist you with.
Best regards,
Ryan LeCompte
[email protected]
http://www.louisiana.edu/~rml7669
"Joanne Corless" <[email protected]> wrote:
>
>
I've fixed it!!!!!!!!
Thanks to everyone who gave me help!!!!
The class loader was the culprit which is what I suspected all along.
As soon
as I put the 2 jar files I was using into an EAR file the problem went
away!!!!!
Thanks again
Jo Corless
"Ryan LeCompte" <[email protected]> wrote:
Hello Joanne,
As Mr. Woollen mentioned, I also believe it's a problem with the class
loader.
You need to be careful how you arrange your EJBs, because WebLogic has
a specific
method in which it loads classes in an EAR, JAR, and WAR file(s). Please
refer
to http://dev2dev.bea.com/articles/musser.jsp for more information about
BEA WebLogic
class loading mechanisms and caveats. Also, try printing out the various
methods
that are available on the object that was returned to you via reflection.
For
example, use the getMethods() method, which returns an array of Method
objects
that you can subsequently cycle through and print out the various method
names.
This way you can discover if the class found/returned to you is indeed
the one
you intend to locate.
Hope this helps,
Ryan LeCompte
[email protected]
http://www.louisiana.edu/~rml7669
Rob Woollen <[email protected]> wrote:
I believe the issue is the home interface class for this EJB is not
available in the class loader which is doing the reflection.
If you do:
getClass().getClassLoader().loadClass(homeInterfaceClassName)
I suspect it will fail. Reflection still requires that the class be
loadable.
-- Rob
Joanne Corless wrote:
Hi Slava,
If I make my code look like you describe below I get a compliationerror telling
me that
home.getMethod() is not recognised (no such method)
If I change it slightly and use
Method homeCreateMethod =
home.getClass().getMethod(homeCreate,homeCreateParam);
The code will compile OK but when executed it still throws a NoSuchMethodException
Any ideas ?
Thanks for your help so far
Regards
Jo Corless
Your code should look like
Object home = pCtx.lookup(pJNDIName);
Method homeCreateMethod =
home.getMethod(homeCreate,homeCreateParam);
return homeCreateMethod.invoke(home, homeCreateParamValues);
Regards,
Slava Imeshev
"Joanne Corless" <[email protected]> wrote in message
news:[email protected]...
Hi Ryan,
I also wanted to mention that if you do a "header search" in this
particular
newsgroup
with the search query as "reflection", you will see many previousmessages
regarding
reflection and EJBs. I believe you could learn a lot from thedifficulties
that
others have faced and solved.I tried that and although there was a number of similar cases noneof them
actually
seem to fix my issue. Thanks for the suggestion though
Are the EJBs that you are trying to access accessible via your
system
classpath?
Try to avoid having them accessible via the main system classpath,and
only bundle
them in your appropriate EJB jar files (contained in an EAR file,for
example).Maybe I should have laid the problem out a little clearer.
I have a number of EJB's bundled up in a JAR file which is hot deployedto
the
server. Within this first JAR file is an EJB (SSB) component that
needs
to
be
able to invoke a known method on another EJB. This second EJB may
or
may
not be
within the first JAR file but it also will be hot deployed.
The component trying to invoke the method on the 2nd EJB has to
be
able to
create
an instance of the 2nd EJB without actually knowing anything bar
a
JNDI
Name which
is passed in at runtime.
I can get as far as doing the
Object home = pCtx.lookup(pJNDIName);
This returned a class with the name
"com.csc.edc.projects.allders.httppostoffice.postman.PostmanBean_mp8qy2_Home
Impl_WLStub"
My problem seems to occur when I try and invoke the create method
Method homeCreate = home.getClass().getMethod("create", new Class[0]);
My code throws a java.lang.NoSuchMethodException at this point so
I
am
unable
to progress to the next step of :
Object bean = homeCreate.invoke(home, null);
So I can return the instantiated bean back to the calling client.
Why am I getting the NoSuchMethodException, is is because I am gettinga
stub
back rather than the home interface and if so how do I get the truehome
interface
from the bean
Thanks in advance
Jo Corless -
Difference Between Business Object And Class Object
Hi all,
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Thanks...
..AshishHello Ashish
A business object is a sematic term whereas a class (object) is a technical term.
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BusinessObject.GetDetail
BusinessObject.Change
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Can a derived class catch base class object
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// code
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here is how it goes
i have a function a class
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Now when i call this function, it returns me a Test object. But i cant do
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How to typecast Object Class object dynamically
Hai every one
i have a object of any particular class , but i don't know the variables in that class object. But i have string variable contains value of variables in that class object.
So i use following method for get value of variables in that class object.
class ObjectCLass
Sub s=new Sub();
public static void main(String[] args)
ObjectCLass a=new ObjectCLass();
try
System.out.println(*a.getClass().getDeclaredField("s").get(a)*);
catch(Exception e)
System.out.println("Exception");
class Sub
int i=5;
public void print()
System.out.println("Hello World!");
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so how can i typecast it
i try with following methods , but i cant succeed
1.( *(a.getClass().getDeclaredField("s").get(a).getClass)* a.getClass().getDeclaredField("s").get(a) ).print() ;
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By
ThiaguIf you know you're going to invoke the "print" method on an object, then you also need to know the type of the class, or interface, which has that method.
It seems what you are looking for is a tutorial on interfaces.
http://java.sun.com/docs/books/tutorial/java/IandI/index.html
In a nutshell, you can set up an interface which defines a "print" method, and create class(es) which implement that interface. Then as long as you have an object which implements that interface, but do not know the exact type of that object, you can simply cast it to the interface type and invoke the method. -
Java Sub-Classing Error. Please Help!
I am trying to understanding some classing sub-classing and the convertion exercise. The errors appear with the code at the bottom at compilation.
HelloWorld.java:7: cannot resolve symbol
symbol : method uniqueInSubSayHello()
location: class SayHello
sh2.uniqueInSubSayHello();
^
HelloWorld.java:11: cannot resolve symbol
symbol : method uniqueInSubSayHello()
location: class SayHello
sh2.uniqueInSubSayHello();
^
class HelloWorld {
public static void main (String args[]) {
subSayHello subsh=new subSayHello();
SayHello sh2=subsh;
sh2.haha();
sh2.uniqueInSubSayHello();
int callUnique() {
sh2.uniqueInSubSayHello();
class SayHello {
public SayHello() {
public void haha() {
class subSayHello extends SayHello {
public subSayHello() {
void uniqueInSubSayHello() {On line 7, sh2 points to an object of type SayHello (as you assigned two lines earlier) and therefore does not know about method UniqueUnSubSayHello.
On line 11, sh2 has not been declared, since sh2 is not a variable declared globally within class SayHello. Therefore, it is not found.
Best regards,
Cemil -
User defined class objects for a ADF component (button,inputfield)
How do I define a user defined class object for ADF objects?
My requirement is that when I do a modification to the class object, it should get reflectected to all the instances on my page.
E.g:- I'm having class object clsInputField, and all my input fields in my pages are based on this object. So when I change clsInputField it should get reflected to all my controls based on this class object.
Please help!!!Hi Timo,
In our client server environment, we have a custom control for managing the zip code (used a Custom InputText field which extends the actual TextField) . All zip code specific validations are written in this custom class. In our application many of the pages uses this Custom component. So if any of the zipcode specific behaviour changes, we could implement this by only changing the Custom InputText field class.
We need to implement this behaviour in our ADF applications. Please advise.
Thanks,
Vishnu -
Why are protected fields not-accessible from sub-classed inner class?
I ran across a situation at work where we have to sub-class an inner class from a third-party package. So, it looks something like this...
package SomePackage;
public class Outer {
protected int x;
public class Inner {
package OtherPackage;
public class NewOuter extends Outer {
public class NewInner extends Outer.Inner {
}Now the NewInner class needs to access protected variables in the Outer class, just like the Inner class does. But because NewOut/NewInner are in a different package I get the following error message.
Variable x in class SomePackage.Outer not accessible from inner class NewOuter. NewInner.You can still access those protected variables from the NewOuter class though. So, I can write accessor methods in NewOuter for NewInner to use, but I am wondering why this is. I know that if NewOuter/NewInner are in the same package as Outer/Inner then everything works fine, but does not when they are in different packages.
I have to use JDK1.1.8 for the project so I don't know if there would be a difference in JDK1.2+, but I would think that nothing has changed. Anyway, if you know why Java disallows access as I have detailed please let me know.Although I don't have the 1.1.8 JDK installed on my system, I was able to compile the following code with the 1.3.1_01 JDK and run it within a Java 1.1.4 environment (the JVM in the MSIE 5.5 browser). As long as you don't access any of the APIs that were introduced with 1.2+ or later, the classes generated by the JDK 1.2+ javac are compatible with the 1.1.4+ JVM.
//// D:\testing\SomePackage\Outer.java ////package SomePackage ;
public class Outer {
protected int x ;
public Outer(int xx) {
x = xx ;
public class Inner {
}//// D:\testing\OtherPackage\NewOuter.java ////package OtherPackage;
import SomePackage.* ;
public class NewOuter extends Outer {
public NewOuter(int xx) {
super(xx) ;
public class NewInner extends Outer.Inner {
public int getIt() {
return x ;
}//// D:\testings\Test.java ////import OtherPackage.* ;
import java.awt.* ;
import java.applet.* ;
public class Test extends Applet {
public void init () {
initComponents ();
private void initComponents() {
add(new Label("x = ")) ;
int myx = new NewOuter(3288).new NewInner().getIt() ;
TextField xfld = new TextField() ;
xfld.setEditable(false) ;
xfld.setText(Integer.toString(myx)) ;
add(xfld) ;
}//// d:\testing\build.cmd ////set classpath=.;D:\testing
cd \testing\SomePackage
javac Outer.java
cd ..\OtherPackage
javac NewOuter.java
cd ..
javac Test.java//// d:\testing\Test.html ////<HTML><HEAD></HEAD><BODY>
<APPLET CODE="Test.class" CODEBASE="." WIDTH=200 HEIGHT=100></APPLET>
</BODY></HTML> -
Hi,
Please let me know if there is a way to index on the vairable in a sub class.
Thanks & regards,
EbeHi Cameron,
The design of the Object is as follows.
Object
--- getSubObjectList() - Returns SubObjectList
----- Contains the list of SubObject
---- SubObject Contains attributes which i query upon.
Please let me know a way how to index on these attributs. Please find the code am using below
Below is the extract method of my Extractor Class
public final class ObjectGraphNavigationValueExtractor extends
AbstractExtractor implements ValueExtractor, ExternalizableLite
public Object extract(Object object) {
if(this.path.equals("attr1") || this.path.equals("attr2")){
MyObject obj =
(MyObject)object;
SubObjectList subList = (SubObjectList) obj.getSubObjectList();
Object aoExtracted[] = subList.toArray();
for(int i=0;i<aoExtracted.length;i++){
SubObject objSubObject =
(SubObject) aoExtracted;
return new BeanWrapperImpl(SubObject).getPropertyValue(this.path);
return new BeanWrapperImpl(object).getPropertyValue(this.path);
I have applied index as follows.
cache.addIndex(new ObjectGraphNavigationValueExtractor("attr1"),true,null);
cache.addIndex(new ObjectGraphNavigationValueExtractor("attr2"),true,null);
Regards,
Ebe
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