inherit problem
Hello!! I have a problem witth retrieve two classes in a two tables. Classes: A and B. B estends A. When I have one class (example: A) I see if Id (getId()) is null. If its true, I do select MAX and I assing to class (setId()). This work ok, always. In the new case (A and B), when I retrieve a class B, I do select MAX, assign id, but returns SQLException, because ID is null. Is possible that if you put auto-retrieve=true, you must use auto-increment?? Its possible another solution? Thanks!!! Carles
RE: inherit problem
My repository.xml has this lines as new In class descriptor of A: extent-class class-ref=x.B / In class descriptor of B: reference-descriptor name=super class-ref=x.A auto-retrieve=true auto-update=true auto-delete=true foreignkey field-ref=idB / /reference-descriptor This is correct, isn't it? Carles -Mensaje original- De: Stefan Schlösser [mailto:[EMAIL PROTECTED] Enviado el: lunes, 03 de mayo de 2004 12:52 Para: OJB Users List Asunto: Re: inherit problem Hi, auto-retrieve does not require auto-increment to be set. You likely made a misstake in your class-definitions and or repository declarations. Stefan Carles Duque wrote: Hello!! I have a problem witth retrieve two classes in a two tables. Classes: A and B. B estends A. When I have one class (example: A) I see if Id (getId()) is null. If its true, I do select MAX and I assing to class (setId()). This work ok, always. In the new case (A and B), when I retrieve a class B, I do select MAX, assign id, but returns SQLException, because ID is null. Is possible that if you put auto-retrieve=true, you must use auto-increment?? Its possible another solution? Thanks!!! Carles - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Problem with boolean
Hi!!! I try to mapping a boolean field in oracle. I have put in field-descriptor: jdbc-type=BIT the field in DB is NUMBER(1) the attributte in class is boolean. I use a fieldconversion: conversion=org.apache.ojb.broker.accesslayer.conversions.Boolean2IntFieldConversion in the field-descriptor. The error when I execute a collection query: Original Exception: java.lang.NullPointerException at org.apache.ojb.jdori.sql.OjbFieldManager.getValue(OjbFieldManager.java:308) at org.apache.ojb.jdori.sql.OjbFieldManager.fetchBooleanField(OjbFieldManager.java:113) at com.sun.jdori.common.state.StateManagerImpl.replacingBooleanField(Unknown Source) at borsatreball.fielding.Camp.jdoReplaceField(Unknown Source) at borsatreball.fielding.Data.jdoReplaceField(Unknown Source) at borsatreball.fielding.Camp.jdoReplaceFields(Unknown Source) at com.sun.jdori.common.state.StateManagerImpl.replaceFields(Unknown Source) at org.apache.ojb.jdori.sql.OjbExtent.provideStateManagers(OjbExtent.java:178) at org.apache.ojb.jdori.sql.OjbExtent.init(OjbExtent.java:101) at org.apache.ojb.jdori.sql.OjbStoreManager.getExtent(OjbStoreManager.java:251) at com.sun.jdori.common.PersistenceManagerImpl.getExtent(Unknown Source) at com.sun.jdori.common.query.QueryImpl.checkCandidates(Unknown Source) at com.sun.jdori.common.query.QueryImpl.execute(Unknown Source) Can you help me?? Thanks!!
Select MAX
I have a problem with this type of select. This is my code:
**
Criteria crit =3D new Criteria();
org.apache.ojb.broker.query.ReportQueryByCriteria query =3D new =
ReportQueryByCriteria(Estudiant.class, crit);
query.setColumns(new String[] { MAX(ID) });
Iterator iter2 =3D broker.getReportQueryIteratorByQuery(query);
***
But I don't know how return this iter2.next(). An Object of nothing... =
because It generate ClassCastException with Estudiant, Long, Integer and =
Double.
Anyone Can help me? Thanks!!
Carles Duque
-
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RE: Select MAX
Thanks Wally, really good...
The final code:
**
Criteria crit = new Criteria();
org.apache.ojb.broker.query.ReportQueryByCriteria query = new
ReportQueryByCriteria(Estudiant.class, crit);
query.setColumns(new String[] { MAX(ID) });
Iterator iter2 = broker.getReportQueryIteratorByQuery(query);
if (iter2.hasNext()){
Object[] objs = (Object[]) iter2.next();
Integer max = (Integer) objs[0];
System.out.println(MAX:+max);
}
**
But I have another question... it's the best way to generate and ID for store new
items??? Sequence is the best??
Thanks. Carles
-Mensaje original-
De: Gelhar, Wallace Joseph [mailto:[EMAIL PROTECTED]
Enviado el: mié 14/04/2004 15:40
Para: OJB Users List
CC:
Asunto: RE: Select MAX
Hi Carles,
Report Queries return an Iterator of Object[]
Object[] objs = iter2.next();
Integer max = objs[0];
Hope this helps,
Wally
-Original Message-
From: Carles Duque [mailto:[EMAIL PROTECTED]
Sent: Wednesday, April 14, 2004 7:54 AM
To: [EMAIL PROTECTED]
Subject: Select MAX
I have a problem with this type of select. This is my code:
**
Criteria crit =3D new Criteria();
org.apache.ojb.broker.query.ReportQueryByCriteria query =3D new =
ReportQueryByCriteria(Estudiant.class, crit);
query.setColumns(new String[] { MAX(ID) });
Iterator iter2 =3D broker.getReportQueryIteratorByQuery(query);
***
But I don't know how return this iter2.next(). An Object of nothing... =
because It generate ClassCastException with Estudiant, Long, Integer and
=
Double.
Anyone Can help me? Thanks!!
Carles Duque
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
Logger Error
Hello, I'm using tomcat and ojb. I test an example of cocoon with ojb: PersistenceManager manager = factory.getPersistenceManager(); /* 2. Get current transaction */ Transaction tx = manager.currentTransaction(); /* 3. Start a Transaction */ tx.begin(); /* 4. now perform persistence operations. Store the new user */ manager.makePersistent(usr); /* 5. Commit the transaction */ tx.commit(); In the tx.begin(); tha application throws an error like this: [BOOT] ERROR: [org.apache.ojb.broker.util.logging.LoggerFactoryImpl] Could not set logger for class null org/apache/commons/lang/exception/NestableException java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableException at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:509) Can you help me? Carles
Logger error
Hello, I'm using tomcat and ojb. I test an example of cocoon with ojb: PersistenceManager manager = factory.getPersistenceManager(); /* 2. Get current transaction */ Transaction tx = manager.currentTransaction(); /* 3. Start a Transaction */ tx.begin(); /* 4. now perform persistence operations. Store the new user */ manager.makePersistent(usr); /* 5. Commit the transaction */ tx.commit(); In the tx.begin(); tha application throws an error like this: [BOOT] ERROR: [org.apache.ojb.broker.util.logging.LoggerFactoryImpl] Could not set logger for class null org/apache/commons/lang/exception/NestableException java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableException at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:509) Can you help me? Carles
