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[CDO] CDOID.toString() => String to CDO ID ? [message #517678]

Mon, 01 March 2010 16:40

Sabri Skhiri

Messages: 43
Registered: February 2010

Member

Hi,

We are implementing a prototype of exportation of subset of a model stored in CDO within an EMF resource. This EMF resource is then modified and we use EMF compare for comparing the exported and the stored models.
When we export the CDO Objects, we set the XMI ID with the CDO ID in order to keep the right correspondence between the exported and the stored model. Then, our ID provider just extract the cdoid.toString().

Now, from the XMI resource we have to retrieve the corresponding cdo object from the repository by giving the Cdo ID string. Is there any facility method for this purpose ?

Note: I have found on the wiki
CDOID id = CDOUtil.extractResourceID(URI.create("cdo:17463524"));
but this method is not visible on CDOUtils on CDO 2.0.
The other solution is to execute a query, but as we would like to use this mechanism in a merge, if we have to execute a query on each element of my treeiterator, it is heavy.

I use Eclipse 3.5 and CDO 2.0.

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Re: [CDO] CDOID.toString() => String to CDO ID ? [message #517718 is a reply to message #517678]

Mon, 01 March 2010 20:06

Eike Stepper

Messages: 6682
Registered: July 2009

Senior Member

This is a multi-part message in MIME format.
--------------000803030504040507000105
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit

Hi Sabri,

Here is a 2.0 example:

| CDOIDObjectFactory cdoidObjectFactory = cdoView().getSession();
CDOID cdoID = CDOIDUtil.read(uriFragment, cdoidObjectFactory);|

Note, that in 3.0 there are no ID factories anymore:

| CDOID cdoID = CDOIDUtil.read(uriFragment);|

Cheers
/Eike

----
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Am 01.03.2010 17:40, schrieb Sabri Skhiri:
> Hi,
>
> We are implementing a prototype of exportation of subset of a model
> stored in CDO within an EMF resource. This EMF resource is then
> modified and we use EMF compare for comparing the exported and the
> stored models.
> When we export the CDO Objects, we set the XMI ID with the CDO ID in
> order to keep the right correspondence between the exported and the
> stored model. Then, our ID provider just extract the cdoid.toString().
>
> Now, from the XMI resource we have to retrieve the corresponding cdo
> object from the repository by giving the Cdo ID string. Is there any
> facility method for this purpose ?
>
> Note: I have found on the wiki CDOID id =
> CDOUtil.extractResourceID(URI.create("cdo:17463524"));
> but this method is not visible on CDOUtils on CDO 2.0.
> The other solution is to execute a query, but as we would like to use
> this mechanism in a merge, if we have to execute a query on each
> element of my treeiterator, it is heavy.
> I use Eclipse 3.5 and CDO 2.0.

--------------000803030504040507000105
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 8bit

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Hi Sabri, 
 
Here is a 2.0 example: 
 
<title></title>
<style type="text/css">

</style>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">



<div class="java" align="left">
<table bgcolor="#ffffff" border="0" cellpadding="3" cellspacing="0">
<tbody>
<tr>
 <td align="left" nowrap="nowrap"
valign="top"> <code> CDOIDObjectFactory cdoidObjectFactory = cdoView ().getSession(); 
 CDOID cdoID = CDOIDUtil.read(uriFragment, cdoidObjectFactory);</code> </td>
 </tr>
</tbody>
</table>
</div>

 
Note, that in 3.0 there are no ID factories anymore: 
 
<title></title>
<style type="text/css">

</style>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">



<div class="java" align="left">
<table bgcolor="#ffffff" border="0" cellpadding="3" cellspacing="0">
<tbody>
<tr>
 <td align="left" nowrap="nowrap"
valign="top"> <code> CDOID cdoID = CDOIDUtil.read(uriFragment);</code> </td>
 </tr>
</tbody>
</table>
</div>

 
Cheers 
/Eike 
 
---- 
<a class="moz-txt-link-freetext" href="http://thegordian.blogspot.com">http://thegordian.blogspot.com</a> 
<a class="moz-txt-link-freetext" href="http://twitter.com/eikestepper">http://twitter.com/eikestepper</a> 
 
 
Am 01.03.2010 17:40, schrieb Sabri Skhiri:
<blockquote cite="mid:hmgqm8$7ac$1@build.eclipse.org" type="cite">Hi,
 
 
We are implementing a prototype of exportation of subset of a model
stored in CDO within an EMF resource. This EMF resource is then
modified and we use EMF compare for comparing the exported and the
stored models.
 
When we export the CDO Objects, we set the XMI ID with the CDO ID in
order to keep the right correspondence between the exported and the
stored model. Then, our ID provider just extract the cdoid.toString().
 
 
Now, from the XMI resource we have to retrieve the corresponding cdo
object from the repository by giving the Cdo ID string. Is there any
facility method for this purpose ?
 
 
Note: I have found on the wiki CDOID id =
CDOUtil.extractResourceID(URI.create("cdo:17463524"));
 
but this method is not visible on CDOUtils on CDO 2.0.
 
The other solution is to execute a query, but as we would like to use
this mechanism in a merge, if we have to execute a query on each
element of my treeiterator, it is heavy. 
I use Eclipse 3.5 and CDO 2.0. </blockquote>
</body>
</html>

--------------000803030504040507000105--

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

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Re: [CDO] CDOID.toString() => String to CDO ID ? [message #518470 is a reply to message #517718]

Thu, 04 March 2010 08:50

Sabri Skhiri

Messages: 43
Registered: February 2010

Member

Great thanks!

Sabri.

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Re: [CDO] CDOID.toString() => String to CDO ID ? [message #520148 is a reply to message #518470]

Thu, 11 March 2010 10:51

Sabri Skhiri

Messages: 43
Registered: February 2010

Member

Hi Eike,

I tried your solution but I have got problems with URI fragment, it seems there is a bug.
I got the URI fragment directly from a CDO object, and the code you advised did not work. Let's see in code:

// open the transaction
CDOTransaction transaction = session.openTransaction();
// get the resource
CDOResource resource = transaction.getResource("/edine/resto2.inventory");
//get the first object and cast it on business object
Restaurant restaurant = (Restaurant) resource.getContents().get(0);

A code inspect at this stage gives:
Got restaurant with CDO ID = OID14, URI Fragment= 14
Now we can use the code you answered in this post:

cdoID = CDOIDUtil.read(restaurant.cdoID().toURIFragment(), cdoidObjectFactory);

Throws an exception:
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatE xception.java:48)
at java.lang.Long.parseLong(Long.java:431)
at java.lang.Long.valueOf(Long.java:525)
at org.eclipse.emf.cdo.spi.common.id.AbstractCDOIDLong.read(Abs tractCDOIDLong.java:59)
at org.eclipse.emf.cdo.common.id.CDOIDUtil.read(CDOIDUtil.java: 181)

More over, if use the code:

CDOIDObjectFactory cdoidObjectFactory =(CDOIDObjectFactory) resource.cdoView().getSession();
EObject resto = resource.getEObject(restaurant.cdoID().toURIFragment());
System.out.println("Got the resto " + resto);

In this case the resto variable is null.

Do you know what's wrong ?

Thank you,

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Re: [CDO] CDOID.toString() => String to CDO ID ? [message #520235 is a reply to message #520148]

Thu, 11 March 2010 16:17

Eike Stepper

Messages: 6682
Registered: July 2009

Senior Member

Hi Sabri,

Sorry I must finish for today. I'll look at it tomorrow...

Cheers
/Eike

----
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Am 11.03.2010 11:51, schrieb Sabri Skhiri:
> Hi Eike,
>
> I tried your solution but I have got problems with URI fragment, it
> seems there is a bug.
> I got the URI fragment directly from a CDO object, and the code you
> advised did not work. Let's see in code:
>
> // open the transaction
> CDOTransaction transaction = session.openTransaction();
> // get the resource
> CDOResource resource =
> transaction.getResource("/edine/resto2.inventory");
> //get the first object and cast it on business object
> Restaurant restaurant = (Restaurant) resource.getContents().get(0);
>
> A code inspect at this stage gives:
> Got restaurant with CDO ID = OID14, URI Fragment= 14
> Now we can use the code you answered in this post:
> cdoID = CDOIDUtil.read(restaurant.cdoID().toURIFragment(),
> cdoidObjectFactory);
> Throws an exception:
> java.lang.NumberFormatException: For input string: ""
> at java.lang.NumberFormatException.forInputString(NumberFormatE
> xception.java:48)
> at java.lang.Long.parseLong(Long.java:431)
> at java.lang.Long.valueOf(Long.java:525)
> at org.eclipse.emf.cdo.spi.common.id.AbstractCDOIDLong.read(Abs
> tractCDOIDLong.java:59)
> at org.eclipse.emf.cdo.common.id.CDOIDUtil.read(CDOIDUtil.java: 181)
>
> More over, if use the code:
> CDOIDObjectFactory cdoidObjectFactory =(CDOIDObjectFactory)
> resource.cdoView().getSession();
> EObject resto = resource.getEObject(restaurant.cdoID().toURIFragment());
> System.out.println("Got the resto " + resto);
> In this case the resto variable is null.
>
> Do you know what's wrong ?
>
> Thank you,
>
>
>

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Report message to a moderator

Re: [CDO] CDOID.toString() => String to CDO ID ? [message #520428 is a reply to message #520148]

Fri, 12 March 2010 10:45

Eike Stepper

Messages: 6682
Registered: July 2009

Senior Member

This is a multi-part message in MIME format.
--------------030901030702030201000304
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit

Ok, my fault. It must be like:

| *public **void *testURIFragment() *throws *Exception
{
CDOSession session = openModel1Session();
CDOTransaction transaction = session.openTransaction();
CDOResource resource = transaction.createResource("/test1");

Supplier supplier = getModel1Factory().createSupplier();
supplier.setName("Stepper");

resource.getContents().add(supplier);
transaction.commit();

StringBuilder builder = *new *StringBuilder();
CDOIDUtil.write(builder, CDOUtil.getCDOObject(supplier).cdoID());

String uriFragment = builder.toString();
System.out.println(uriFragment);

CDOID id = CDOIDUtil.read(uriFragment, (CDOIDObjectFactory)session);
System.out.println(id);
}|

Cheers
/Eike

----
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Am 11.03.2010 11:51, schrieb Sabri Skhiri:
> Hi Eike,
>
> I tried your solution but I have got problems with URI fragment, it
> seems there is a bug.
> I got the URI fragment directly from a CDO object, and the code you
> advised did not work. Let's see in code:
>
> // open the transaction
> CDOTransaction transaction = session.openTransaction();
> // get the resource
> CDOResource resource =
> transaction.getResource("/edine/resto2.inventory");
> //get the first object and cast it on business object
> Restaurant restaurant = (Restaurant) resource.getContents().get(0);
>
> A code inspect at this stage gives:
> Got restaurant with CDO ID = OID14, URI Fragment= 14
> Now we can use the code you answered in this post:
> cdoID = CDOIDUtil.read(restaurant.cdoID().toURIFragment(),
> cdoidObjectFactory);
> Throws an exception:
> java.lang.NumberFormatException: For input string: ""
> at java.lang.NumberFormatException.forInputString(NumberFormatE
> xception.java:48)
> at java.lang.Long.parseLong(Long.java:431)
> at java.lang.Long.valueOf(Long.java:525)
> at org.eclipse.emf.cdo.spi.common.id.AbstractCDOIDLong.read(Abs
> tractCDOIDLong.java:59)
> at org.eclipse.emf.cdo.common.id.CDOIDUtil.read(CDOIDUtil.java: 181)
>
> More over, if use the code:
> CDOIDObjectFactory cdoidObjectFactory =(CDOIDObjectFactory)
> resource.cdoView().getSession();
> EObject resto = resource.getEObject(restaurant.cdoID().toURIFragment());
> System.out.println("Got the resto " + resto);
> In this case the resto variable is null.
>
> Do you know what's wrong ?
>
> Thank you,
>
>
>

--------------030901030702030201000304
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 8bit

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Ok, my fault. It must be like: 
 
<title></title>
<style type="text/css">

</style>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">



<div class="java" align="left">
<table bgcolor="#ffffff" border="0" cellpadding="3" cellspacing="0">
<tbody>
<tr>
 <td align="left" nowrap="nowrap"
valign="top"> <code> public void testURIFragment() throws Exception 
 { 
 CDOSession session = openModel1Session(); 
 CDOTransaction transaction = session.openTransaction (); 
 CDOResource resource = transaction.createResource ("/test1"); 
 
 Supplier supplier = getModel1Factory().createSupplier(); 
 supplier.setName("Stepper"); 
 
 resource.getContents().add(supplier); 
 transaction.commit(); 
 
 StringBuilder builder = new StringBuilder(); 
 CDOIDUtil.write(builder, CDOUtil.getCDOObject(supplier).cdoID()); 
 
 String uriFragment = builder.toString(); 
 System.out.println(uriFragment); 
 
 CDOID id = CDOIDUtil.read(uriFragment, (CDOIDObjectFactory)session); 
 System.out.println(id); 
 }</code>
</td>
 </tr>
</tbody>
</table>
</div>

 
Cheers 
/Eike 
 
---- 
<a class="moz-txt-link-freetext" href="http://thegordian.blogspot.com">http://thegordian.blogspot.com</a> 
<a class="moz-txt-link-freetext" href="http://twitter.com/eikestepper">http://twitter.com/eikestepper</a> 
 
 
 
Am 11.03.2010 11:51, schrieb Sabri Skhiri:
<blockquote cite="mid:hnai0a$sog$1@build.eclipse.org" type="cite">Hi
Eike,
 
 
I tried your solution but I have got problems with URI fragment, it
seems there is a bug.
 
I got the URI fragment directly from a CDO object, and the code you
advised did not work. Let's see in code:
 
 
// open the transaction
 
CDOTransaction transaction = session.openTransaction();
 
// get the resource
 
CDOResource resource =
transaction.getResource("/edine/resto2.inventory");
 
//get the first object and cast it on business object
 
Restaurant restaurant = (Restaurant) resource.getContents().get(0);
 
 
A code inspect at this stage gives:
 
Got restaurant with CDO ID = OID14, URI Fragment= 14
 
Now we can use the code you answered in this post:
 
cdoID = CDOIDUtil.read(restaurant.cdoID().toURIFragment(),
cdoidObjectFactory);
 
Throws an exception:
 
java.lang.NumberFormatException: For input string: ""
 
 at java.lang.NumberFormatException.forInputString(NumberFormatE
xception.java:48)
 
 at java.lang.Long.parseLong(Long.java:431)
 
 at java.lang.Long.valueOf(Long.java:525)
 
 at org.eclipse.emf.cdo.spi.common.id.AbstractCDOIDLong.read(Abs
tractCDOIDLong.java:59)
 
 at org.eclipse.emf.cdo.common.id.CDOIDUtil.read(CDOIDUtil.java:
181)
 
 
More over, if use the code:
 
CDOIDObjectFactory cdoidObjectFactory =(CDOIDObjectFactory)
resource.cdoView().getSession();
 
EObject resto =
resource.getEObject(restaurant.cdoID().toURIFragment());
 
System.out.println("Got the resto " + resto);
 
In this case the resto variable is null.
 
 
Do you know what's wrong ?
 
 
Thank you,
 
 
 
 
</blockquote>
</body>
</html>

--------------030901030702030201000304--

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

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Re: [CDO] CDOID.toString() => String to CDO ID ? [message #520758 is a reply to message #520428]

Mon, 15 March 2010 08:40

Sabri Skhiri

Messages: 43
Registered: February 2010

Member

The code works, but let me come back on my first question, how can I can retrieve the CDO ID from a serialized-string ? (for instance "OID14)
In your snippet you use:

StringBuilder builder = *new *StringBuilder();
CDOIDUtil.write(builder, CDOUtil.getCDOObject(supplier).cdoID());
String uriFragment = builder.toString();

The CDOIDUtil uses the CDO ID object to get:
1. the ordinal
2. the uri fragment
As a result if I serialized the CDO ID as a string, I cannot rebuild the URI fragment and therefore, I cannot get the corresponding CDO Object.
Does it means that the only way to get the corresponding CDO Object is to serialized directly the URI Fragment ?

Thanks,

Sabri.

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Re: [CDO] CDOID.toString() => String to CDO ID ? [message #520772 is a reply to message #520758]

Mon, 15 March 2010 09:54

Eike Stepper

Messages: 6682
Registered: July 2009

Senior Member

Am 15.03.2010 09:40, schrieb Sabri Skhiri:
> The code works, but let me come back on my first question, how can I
> can retrieve the CDO ID from a serialized-string ? (for instance "OID14)
> In your snippet you use:
> StringBuilder builder = *new *StringBuilder();
> CDOIDUtil.write(builder, CDOUtil.getCDOObject(supplier).cdoID());
> String uriFragment = builder.toString();
> The CDOIDUtil uses the CDO ID object to get:
> 1. the ordinal
> 2. the uri fragment
> As a result if I serialized the CDO ID as a string, I cannot rebuild
> the URI fragment and therefore, I cannot get the corresponding CDO
> Object.
> Does it means that the only way to get the corresponding CDO Object is
> to serialized directly the URI Fragment ?
I'm not sure I understand your point. Didn't the test code snippet
demonstrate that you *can* CDOUtil.read() the serialized form?!

BTW. CDOID extends Serializeable, hence you could also use Java
serialization. but the result would probably not be human readable.

Cheers
/Eike

----
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Report message to a moderator

Re: [CDO] CDOID.toString() => String to CDO ID ? [message #520782 is a reply to message #520772]

Mon, 15 March 2010 10:29

Sabri Skhiri

Messages: 43
Registered: February 2010

Member

Actually, I use the CDO ID serialized in String (OID14), while, in your code you use the URI fragment as serialized string. So, OK, I will use the URI fragment as XMI ID instead of CDO ID, therefore, I will be able to retrieve the corresponding CDO object.

Thanks for the support !

Sabri.

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Re: [CDO] CDOID.toString() => String to CDO ID ? [message #520792 is a reply to message #520782]

Mon, 15 March 2010 11:36

Eike Stepper

Messages: 6682
Registered: July 2009

Senior Member

Am 15.03.2010 11:29, schrieb Sabri Skhiri:
> Actually, I use the CDO ID serialized in String (OID14), while, in
> your code you use the URI fragment as serialized string.
The CDOID *is* the URI fragment.

> So, OK, I will use the URI fragment as XMI ID instead of CDO ID,
> therefore, I will be able to retrieve the corresponding CDO object.
Yes ;-)

>
> Thanks for the support !
You're welcome.

Cheers
/Eike

----
http://thegordian.blogspot.com
http://twitter.com/eikestepper

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

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