Question about Objects Hierarchy

Hi Guys,
Question :
I am writing an applet let's say Zoo extends JApplet
let's say I have a class Bear that extends Mammal. and Mammal that extends Animal.
Now, I have an ArrayList<animal> cage = new ...
and along the way I am adding Bears to my cage : cage.add(new Bear)...
my question is: how would I write a search loop that returns the Bears from my cage ?
and : how would I write a loop that returns the mammals:
I have tried the following :
for (int k = 0 ; k< cage.size() ; k++) if (cage.get(k) == Mammal) return cage.get(k);
didn't work
also tried :
for (int k = 0 ; k< cage.size() ; k++) if (cage.get(k).getClass == Mammal) return cage.get(k);
and didn't work
any ideas ?
Thanks a lot ... ( and my apologies if my example offends any animal lovers, I am one my self :)

You want to return them all, or just the first one you come to?
To make it simple let's suppose you want to return just the first one. And since you're using Java 5 techniques like Generics, let's clean up your code to use the Java 5 enhanced for loop as well:
for (animal one: cage) {
if (one instanceof Mammal) { // This was your question, I think
return one;
}If you have to return them all, then add them to a new List as you find them and return that when you're done going through the cage.

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I got a question about Object class in AS3 recently.
I typed some testing codes as following:
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trace( cls === cst); // true
so cls & cst are the same thing ( the Object ).
var obj:Object = new Object();
var cst2:* = obj.constructor.constructor;
var cst3:* = obj.constructor.constructor.c.constructor;
var cst5:* = Object.prototype.constructoronstructor;
var cst4:* = Object.prototype.constructor.constructor.constructor;
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trace(cst2 === cst3 && cst3 === cst4 && cst4 === cst5 && cst5 === cst6); //true
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I debugged into these codes and found that cst & cst2 had the same content but not the same object,
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throws an exception said that cst2 is not a constructor.
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I used "describeType" and found that "cst2" is actually "Class" class.
So,
trace(cst2 === Class); // true
That's what I want to know, Thank you.

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I just started using COM objects in ColdFusion. I am mostly
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Hey,
This is all just a theoretical discussion so do understand that the code itself is not germane to the topic.
I have been mulling over the whole object release/retain/copy thing and need to understand a bit more the real inner workings of the beast. The catalyst for this is the repetitional fervor that most books on the subject of Objective C have employed. Yet they all seem to fail in a complete explanation of the whys and wherefores so that one can determine on her own the correct implementation of this.
Let's say I have an Object. For the fun of it it is an instance of NSObject and we'll call it myObject.
When I "create" this object thusly:
NSObject *myObject = [[NSObject alloc] init];
What I, in fact get back is a pointer to the object in question, yes?
So when I "seemingly" add this object to an array like:
NSArray *myArray = [[NSArray alloc] initWithObject:myObject];
What is actually placed in the array? is it another pointer to the original object created by myObject or is it a pointer to the pointer of myObject?
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At what point should I release the array, after it is passed to the calling method (with the use of an autorelease) or when the class that it is encapsulated in is done?
Sorry about the length of this but I can't believe that I would be the only one that would be helped by such a discussion.
MM

etresoft,
Thanks for the detailed reply. I wish I could say that I wasn't still a bit confused by this. I thought I had this down after going through the lessons. It seems to not be working in practice the way that it works in theory.
My current project is an example
In a class I have declared a couple of ivars thusly:
NSMutableString *source;
NSMutableString *destination;
@property (nonatomic, retain) NSMutableString *source;
@property (nonatomic, retain) NSMutableString *destination;
This is followed by the appropriate @synthesize directives.
in the init method for my class I have the following:
source = [[NSMutableString alloc] initWithString:@"customer"];
destination = [[NSMutableString alloc] initWithString:@"home"];
in a method triggered by a button click I have the following:
if (sender == sourcePop){
source = [sourcePop titleOfSelectedItem];
}else{
destination = [destinationPop titleOfSelectedItem];
NSLog(@"SOURCE-%@", source);
NSLog(@"DESTINATION-%@", destination);
When I run the code and change the source selection the console reads the correct value for what is in the source popupbutton and "home" for the destination. If I then change the destination popupbutton I get a crash and nothing written to the console.
Placing a breakpoint at the beginning of the "if" and running shows me that just before the crash the source ivar is reported as "out of scope." There are no release or autorelease statements for this ivar anywhere in the class. Yet if I change the line that sets the ivar to the value of the popupbutton to this:
[source = [sourcePop titleOfSelectedItem] retain];
The debugger will have the correct value for the ivar and when run normally there is no crash.
I would assume that the problem is that the ivar is being released but I am not the one releasing it. Why does this behavior happen? Shouldn't the retain count still be 1 since the @property directive has it and there is no release in the code? Or is it that the statement that sets the ivar to the value of the popup really just setting it to the pointer and it is the popup that is somehow being released?
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MM

Questions about keyword hierarchy

I'm in the process of designing and building a keyword hierarchy for LR3.5, and I'm at a loss to understand a couple of things.
In the process of deciding how to build this, I've looked at a number of hierarchies people have posted to the web. One thing I've noted is that people sometimes have the same word in multiple hierarchies, and sometimes the same word as both a regular entry and as a synonym. For example:
Architecture
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Many thanks.

Thanks web-weaver.
I posted basically the same question in a couple of other places, and got conflicting answers. And the information I found on web searches tended to explain HOW to set up a hierarchy, but not how it really worked, and information on synonyms is especially limited, and often conflicting. So I did some tests. So as to not use any words that were already in my keyword list, I built a simple hierarchy of words not currently in use:
Colors
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        {Azure}
    Red
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                        Salmon
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        {BRG}
        {Emerald}
    Cyan
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Fruit
    Orange
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(I actually had a couple of other trees, but this is enough to demonstrate how they actually work.)
And it turns out synonyms don't work quite like I expected them to, and are, honestly, so limited I question their value.
Test1: Tag a photo with the keyword Cyan. Only Cyan gets applied to the metadata, not any of the words associated with it (Blue, Colors, Azure). Searching, I can find the image by searching on Cyan, or Colors. But NOT by searching on Blue.
Test2: Tag a photo with the keyword Blue. Only Blue gets applied to the metadata, not Cyan, or Azure. When searching, I can find it by searching on Blue, or any of it's synonyms (Cyan, Azure), or Colors.
(I had expected synonyms to work the other way, I think. So that if I searched on Blue I'd get all images tagged with Blue, but also those tagged with Azure and Cyan. )
Test3: Tag one photo with Cyan, and another with Blue. Searching with Cyan gets me both images, as does searching with Colors. Searching on Blue gets me only the image tagged with Blue.
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Test 5: Tag a photo with the word Red (and nothing else). I find it by searching on Red, or Colors, but not Pink or Rose.
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Synonyms affect only search, and not tagging (assignment). Searching on a term that is a synonym will find images tagged with the main word. (e.g., search on Azure and you'll find Blue, but not Colors).
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The worst limitation of using synonyms is that when you're tagging an image, LR3 isn't smart enough to know the synonyms exist. So if I tag an image with the word Azure, LR3 doesn't substitute Blue, or use the synonym where it already exists in the hierarchy. Instead, creates a new, top level entry named Azure, not tied in any way to the alias or the "Colors" tree.
It seems like it would be useful to be able to enter Blue as a search term and find any images tagged with Azure and Cyan. Or enter Red as a search term and find Pink and Rose, too. The way it's implemented now forces you to enter the term you're most likely to use (Blue, for example) at the bottom of the hierarchy, and the least used words above. Or to use synonyms, and hope you never get confused an enter a synonym as a keyword instead of the word it refers to.
It seems to me it's more useful to just use Azure as another keyword beneath (or maybe above) Blue in the hierarchy. At least that way if I tag an image with Azure, I'm not creating a new entry in the Keyword list. I'm not sure I see much value in synonyms as they're currently implemented, but if someone has some examples of how synonyms benefit them I'd be delighted to see them.
Hopefully this information will be of use to someone.

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Hi,
Let's say I've created a new object. One of the properties of my object
is an array. I would like another property to return the length of that
array. How do I do this.
For instance here's some code (and I hope that the email interface
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function test(){
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this.a.length) and that works, but then to get the length I keep having
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How can I avoid that? How can I have a built-in length property for an
object.
Hope this is clear and has come out legibly via email. Apologies in
advance if it hasn't.
Thanks,
Ariel

Hi all,
1) About the original question—which doesn't regard prototype inheritance in itself: "How can I have a built-in length property for an object"—I think the most obvious approach is to directly use an Array as the base object. Since any Array is an Object you can append methods and properties to it while keeping benefit from the whole array's API:
var myData = [];
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// Usage
myData[0] = 10;
myData[1] = 20;
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// etc.
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var myObj = {
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    meth: function(){ alert("Hello World!"); },
    // etc.
then the challenge is more difficult for the reasons that Jeff mentioned above. You can anyway mimic a kind of 'binding' mechanism this way:
// The original obj
var myObj = {
    items: [],
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(myObj.length = function F(n)
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@+
Marc

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Hi everyone,
Right now I'm updating my oracle skills, years ago without programming (last time with Oracle 7.3 :O)
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I have been involved in some of these projects that have used Java, C#, VB, C++ etc. as front-end languagaes. I have been able to implement these projects successfully using the following approach:
1. create a relational model of the database - third-normal form (assuming it is an OLTP application)
2. Write PL/SQL code (packages and procedures mainly)
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http://www.impact-sol.com
Developers of Guggi Oracle - Tool for DBAs and Developers

Question about object retention and scope

I have a hole in my understanding of Cocoa.
I can create temp objects, to populate an array with, like this:
for(int i=0;i<10;i++)
myObject *tmpObj= [[[myObject alloc] init]] ;
[[myMutableArray addObject:tmpObj]];
[[tmpObj release]];
But I don't understand why this works. If the tmpObjects get released, then why don't the ones in the array get released? (I can access the array later, and it is populated with myObjects.)

If you create an object from scratch (alloc, etc) then it's up to you to release it.
If you get an object from another method of the system you don't have to worry about releasing it. More than likely it's set to auto-release but it's not your responsibility.
If you want to hold on to any object then you retain it if you didn't create it. Any object you've retained you're responsible for releasing.
If you pass an object before releasing it's up to that object to hold on to it if it needs it.
Links:
http://www.stepwise.com/Articles/Technical/2001-03-11.01.html
http://developer.apple.com/documentation/Cocoa/Conceptual/MemoryMgmt/Tasks/Memor yManagementRules.html
Article on leaks
http://www.cimgf.com/2008/04/02/cocoa-tutorial-fixing-memory-leaks-with-instrume nts/

Question about objects

Hi
I make a number of objects, they are all from the same class but have differing values.
I put the objects into different arrays
I put all the objects in a hash table so that i can associate the object with a string.
tempOb = create.make()
compFd= tempOb; //
tempStr = compFd[i].returnTextValue();
theRef.put(tempStr, tempCard);
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Thanks

Hi
I make a number of objects, they are all from the same
class but have differing values.
I put the objects into different arrays
I put all the objects in a hash table so that i can
associate the object with a string.
tempOb = create.make()
compFd= tempOb; //
tempStr = compFd[i].returnTextValue();
theRef.put(tempStr, tempCard);
My question is where do the objects actually exist -
and where are they only a reference to the object ? I
ask because i am thinking that maybe its uneccsary to
make arrays for objects when i could simply have
string arrays and use the string to take the object
from the hash table.
Thanks
FIrst of all you need to revisit what an object is?
An object is a self-contained entity which has its own private collection of properties (ie data) and methods (ie. operations) that encapsulate functionality into a reusable and dynamically loaded structure. After a class definition has been created as a prototype, it can be used as a template for creating new classes that add functionality. Objects are programing units of a particular class. Dynamic loading implies that applications can request new objects of a particular class to be supplied on an 'as needed' basis. Objects provide the extremely useful benefit of reusable code that minimizes development time. As far as the storage is concerned and all object variables are references.

Easy question about objects

why with this code;
private Scanner x;
public void openfile(){
try {
x = new Scanner(new File(chinese.txt));
why do you say x is a variable at private scanner x and then make x an object? why do both variable and object? the code is from http://www.youtube.com/watch?v=3RNYUKxAgmw
Edited by: 980099 on Jan 19, 2013 4:30 PM
Edited by: 980099 on Jan 19, 2013 4:38 PM
Edited by: 980099 on Jan 19, 2013 4:42 PM

why do you say x is a variable at private scanner xThe code doesn't actually say it's a variable, but it is. It is a reference of type Scanner. As it isn't initialized in the declaration, its initial value is null.
and then make x an object? It doesn't. it creates a new Scanner instance and then assigns the reference to 'x'.
why do both variable and object?You should now be able to see that the question is meaningless.

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CC_ALIAS SV_NAME CC_NAME CT_ALIAS
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CP_ACTV_MTS_PROCS MAXTASKS CP_MAX_MTS_PROCS CP_START_TIME CP_END_TIM
E CC_INCARN_NO CC_DESC_TEXT
SERVER FSMSrvr FSMSrvr File System Manager
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0 1 1 2012-06-29 16:52:34
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   Background Running Auto SystemAux January 1
                                                 2012-06-29 16:52:39
SvrTaskPersist Server SERVER Task Persistence BusSvcMgr
   Background Running Auto SystemAux January 1
                                                 2012-06-29 16:52:39
SERVER Siebel Administrator Notification Component AdminNotify AdminNotif
Auto Online and Batch SystemAux 0 10
            1 1 2012-06-29 16:52:39
Siebel Connection Broker SCBroker SERVER SCBroker
   Background Running System Auto 1 January
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8 rows returned.
how I can change others?

Sebastian,
You can run command below using srvrmgr:
enable compgrp callcenter
Callcenter component group has call center Object Manager. You need to restart the Siebel Server after running this command. Check link below for further details:
http://docs.oracle.com/cd/E14004_01/books/SystAdm/SystAdm_SrvrMgrCLI12.html#wp1004864
You may need to assign the component group to a specific siebel server.
Thanks,
Wilson

Basic questions about Objects and variables...

If I have the following:
Species theAnimal = new Species();
Am I right in saying that the object here is 'theAnimal'?.
If we just wrote it as:
Species theAnimal
Then i'm assuming that here 'theAnimal' is the variable name...right?
I'm just trying to get facts straight when reading.
Thanks for the help...
Yash

At first, theAnimal is pointing to one object, and
theMammoth is pointing to another?
In the final line, they're both pointing to the same
object. Isn't that kind of saying, they're pointing
to the same memory address/location?Yes.
They might actually hold the physical memory address of the object, or they might hold some other abstraction that the VM uses to locate the object. In either case, though, they both hold the same value, and you can picture that value as the address of the object.

Question about object lock

Hello everyone,
I want to know which method owns the lock of a specific object (some of my methods are blocked because they can not achieve the lock of a specific object, and I am wondering which method owns the lock to solve the deadlock issue). Does anyone know how to get the information?
Thanks in advance,
George

Thanks Feamar,
U should not think of a method as having a lock,
rather than that u should think of a piece of
synchronized code to have the lock on an object.
U should try and find nested synchronization
statements in your code, those are risky and can lead
to deadlocks.
Good luckYour reply is very helpful. What means "nested synchronization statement" in your reply?
regards,
George

LDAP BC QUESTION ABOUT OBJECT CLASSES

Hi
i am working with a bpel and its ldap-bc, when i create an entry in my ldap through the bpel it has all the object classes from the attributes i set. for example if i set cn and sn attributes then my entry has the object class person; i want to know if there is any way of setting object classes to my entry on the ldap, even if i am not setting any attributes; for example if i only set the cn and sn attributes using the bpel, i still can tell the entry that it can has another objectclass like iplanet-am-user-service with out setting any of its attributes.
thanks for your help

Actually, I'm not getting duplicate objects, but I like to get rid of
doubles in one particular column.
For example if I had a table as follows:
Table DESC
int pkid
String description
description can contain duplicate entries, I want to query as follows:
select distinct description from DESC
How could I write a query which retrieves all tuples in a table, but removes
duplicate from a specific column?
Thanks.
Andreas.
Abe White wrote:
How does the engine use DISTINCT automatically?It detects whether joins are made such that duplicate rows might be
returned from the JDOQL filter, and if so adds a DISTINCT.
What I basically want to do is to remove any doubles I get from the
query. When I turn logging on to see the sql statement, I only get a
SELECT without the DISTINCT keyword.You shouldn't be getting doubles. If you are, could you please post the
offending JDOQL filter and give some description of the schema and/or
object model? There is a bug in Kodo in which some queries involving OR
clauses and joins are not made DISTINCT when they should be, but it has
been resolved for our upcoming 2.5 release.
Is there also a way I can specify GROUP BY?No, JDOQL does not have an equivalent to GROUP BY.

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