Valueholderinterface - Many-to-Many mapping problem

Hi
i have two tables users and teams and i have created many-to-many relationship between two table through intermediated(users_teams) table. Here user can have many teams and team can have many users.But the following exception i m getting while getting teams from user and users from team.
Caused by: Exception [TOPLINK-0] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311
)): oracle.toplink.exceptions.IntegrityException
Descriptor Exceptions:
Exception [TOPLINK-2] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311)): oracle.
toplink.exceptions.DescriptorException
Exception Description: The attribute [teams] is declared as type ValueHolderIn
terface, but its mapping does not use indirection.
Mapping: oracle.toplink.mappings.ManyToManyMapping[teams]
Descriptor: Descriptor(com.test.Users --> [DatabaseTable(USERS)])
Exception [TOPLINK-7] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311)): oracle.
toplink.exceptions.DescriptorException
Exception Description: The attribute [teams] should be of type Vector (or a ty
pe that implements Map or Collection, if using Java 2).
Mapping: oracle.toplink.mappings.ManyToManyMapping[teams]
Descriptor: Descriptor(com.test.Users --> [DatabaseTable(USERS)])
Exception [TOPLINK-2] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311)): oracle.
toplink.exceptions.DescriptorException
Exception Description: The attribute [users] is declared as type ValueHolderIn
terface, but its mapping does not use indirection.
Mapping: oracle.toplink.mappings.ManyToManyMapping[users]
Descriptor: Descriptor(com.test.Teams --> [DatabaseTable(TEAMS)])
Exception [TOPLINK-7] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311)): oracle.
toplink.exceptions.DescriptorException
Exception Description: The attribute [users] should be of type Vector (or a ty
pe that implements Map or Collection, if using Java 2).
Mapping: oracle.toplink.mappings.ManyToManyMapping[users]
Descriptor: Descriptor(com.test.Teams --> [DatabaseTable(TEAMS)])
Exception [TOPLINK-163] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311)): oracl
e.toplink.exceptions.DescriptorException
Exception Description: This mapping's attribute class does not match the collect
ion class. [class java.util.Vector] cannot be assigned to [interface oracle.top
link.indirection.ValueHolderInterface].
Please help me out to resolve this problem.

Either use indirection in your mappings, or change you class to just use a normal collection, not a ValueHolderInterface.
-- James : http://www.eclipselink.org

Similar Messages

JPA One-To-Many Parent-Child Mapping Problem

I am trying to map an existing legacy Oracle schema that involves a base class table and two subclass tables that are related by a one-to-many relationship which is of a parent-child nature.
The following exception is generated. Can anybody provide a suggestion to fix the problem?
Exception [EclipseLink-45] (Eclipse Persistence Services - 2.0.0.v20091127-r5931): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: Missing mapping for field [BASE_OBJECT.SAMPLE_ID].
Descriptor: RelationalDescriptor(domain.example.entity.Sample --> [DatabaseTable(BASE_OBJECT), DatabaseTable(SAMPLE)])
The schema is as follows:
CREATE TABLE BASE_OBJECT(
"BASE_OBJECT_ID" INTEGER PRIMARY KEY NOT NULL,
"NAME" VARCHAR2(128) NOT NULL,
"DESCRIPTION" CLOB NOT NULL,
"BASE_OBJECT_KIND" NUMBER(5,0) NOT NULL );
CREATE TABLE SAMPLE(
"SAMPLE_ID" INTEGER PRIMARY KEY NOT NULL,
"SAMPLE_TEXT" VARCHAR2(128) NOT NULL )
CREATE TABLE SAMPLE_ITEM(
"SAMPLE_ITEM_ID" INTEGER PRIMARY KEY NOT NULL,
"SAMPLE_ID" INTEGER NOT NULL,
"QUANTITY" INTEGER NOT NULL )
The entities are related as follows:
SAMPLE.SAMPLE_ID -> BASE_OBJECT.BASE_OBJECT_ID - The PKs that are used to join the sample to the base class
SAMPLE_ITEM.SAMPLE_ITEM_ID -> BASE_OBJECT.BASE_OBJECT_ID - The PKs that are used to join the sample item to the base class
SAMPLE_ITEM.SAMPLE_ID -> SAMPLE.SAMPLE_ID - The FK that is used to join the sample item to the sample class as a child of the parent.
SAMPLE is one to many SAMPLE_ITEM
The entity classes are as follows:
@Entity
@Table( name = "BASE_OBJECT" )
@Inheritance( strategy = InheritanceType.JOINED )
@DiscriminatorColumn( name = "BASE_KIND", discriminatorType = DiscriminatorType.INTEGER )
@DiscriminatorValue( "1" )
public class BaseObject
extends SoaEntity
@Id
@GeneratedValue( strategy = GenerationType.SEQUENCE, generator = "BaseObjectIdSeqGen" )
@SequenceGenerator( name = "BaseObjectIdSeqGen", sequenceName = "BASE_OBJECT_PK_SEQ", allocationSize = 1 )
@Column( name = "BASE_ID" )
private long baseObjectId = 0;
@Entity
@Table( name = "SAMPLE" )
@PrimaryKeyJoinColumn( name = "SAMPLE_ID" )
@AttributeOverride(name="baseObjectId", column=@Column(name="SAMPLE_ID"))
@DiscriminatorValue( "2" )
public class Sample
extends BaseObject
@OneToMany( cascade = CascadeType.ALL )
@JoinColumn(name="SAMPLE_ID",referencedColumnName="SAMPLE_ID")
private List<SampleItem> sampleItem = new LinkedList<SampleItem>();
@Entity
@Table( name = "SAMPLE_ITEM" )
@PrimaryKeyJoinColumn( name = "SAMPLE_ITEM_ID" )
@AttributeOverride(name="baseObjectId", column=@Column(name="SAMPLE_ITEM_ID"))
@DiscriminatorValue( "3" )
public class SampleItem
extends BaseObject
@Basic( optional = false )
@Column( name = "SAMPLE_ID" )
private long sampleId = 0;
Edited by: Chris-R on Mar 2, 2010 4:45 PM

Thanks for the thoroughness. There was a mistake in moving the code over for the forum. The field names are correct throughout the original source code.
BASE_OBJECT_ID is used throughout.
I suspect the problem lies in the one-to-many sampleItem(s) relationship that is based upon the subclassed item class. (The relationship is actually "sampleItems" in the real code and somehow got changed in the move over.)
The problem may lie in the mapping of the attribute override in the child class to the referencing of the item class from the parent side of the relationship in the Sample class.
I further suspect this may be specific to Eclipselink based upon other postings I've seen on the web that have similar problems...
Any thoughts?
Edited by: Chris-R on Mar 3, 2010 9:56 AM

Hibernate - Spring - problem with mapping (many-to-many)

Hello,
I want to map the following situation. I have a table called EDUCATION and a table called SCHOOLS. Between those tables I have an associative table called EDUCATION_SCHOOLS. The (usefull) fields:
EDUCATION:
id (long) - PK
name (varchar)
versionNr (long)
SCHOOLS:
id (long) - PK
name (varchar)
versionNr (long)
EDUCATION_SCHOOLS:
id (long) - PK
education_id (long) (FK to EDUCATION.id)
school_id (long) (FK to SCHOOLS.id)
name (varchar)
versionNr (long)
Their is a Unique Constraint between EDUCATION_SCHOOLS.education_id and EDUCATION_SCHOOLS.school_id.
What I want to be able to do:
EDUCATION: select, update, insert
SCHOOLS: select, update, insert
EDUCATION_SCHOOLS: select, update (only the non-FK fields), insert
I never want to delete anything in those tables. (and it's never ever going to be an option either)
Hibernate version:
Hibernate-Version: 3.0.5
Mapping documents:
Education:
<hibernate-mapping>
     <class name="##.Education" table="EDUCATION">
          <id name="id" column="ID" type="java.lang.Long">
               <generator class="sequence">
                    <param name="sequence">EDUCATION_SEQ</param>
               </generator>
          </id>
          <version name="versionNr" column="VERSIONNR" type="long"/>
          <property name="name" column="NAME" type="string" />
        <set name="SCHOOLS" table="EDUCATION_SCHOOLS">
            <key column="EDUCATION_ID" />
            <many-to-many class="##.Schools" column="SCHOOL_ID" lazy="false" />
        </set>
</hibernate-mapping>
Schools:
<hibernate-mapping>
     <class name="##.Schools" table="SCHOOLS">
          <id name="id" column="ID" type="java.lang.Long">
               <generator class="sequence">
                    <param name="sequence">SCHOOLS_SEQ</param>
               </generator>
          </id>
          <version name="versionNr" column="VERSIONNR" type="long"/>
          <property name="name" column="NAAM_NAME" type="string" />
        <set name="educations" table="EDUCATION_SCHOOLS" inverse="true" cascade="none">
            <key column="SCHOOL_ID" />
            <many-to-many class="##.Schools" column="SCHOOL_ID" lazy="proxy"/>
        </set>
</hibernate-mapping>
Education_schools:
<hibernate-mapping>
<class name="##.EducationSchools" table="EDUCATION_SCHOOLS">
           <id name="id" column="ID" type="java.lang.Long" unsaved-value="0">
               <generator class="sequence">
                    <param name="sequence">SEQ_EDUCATION_SCHOOLS</param>
               </generator>
          </id>
          <version name="versionNr" column="VERSIONNR" type="long" />
          <many-to-one name="education" class="##.Education" cascade="none" lazy="proxy"
                       column="EDUCATION_ID" not-null="true"/>
        <many-to-one name="schools" class="##.Schools" cascade="none" lazy="proxy"
                    column="SCHOOL_ID" not-null="true"/>
</hibernate-mapping>
Name and version of the database you are using:
Oracle XE 10g
I am able to:
EDUCATION: select, insert, update
SCHOOLS: select, insert, update
EDUCATION_SCHOOLS: select
Problems:
EDUCATION_SCHOOLS: when I try to insert, I sometimes get unique constraint violations. (when I should get them, thus I'm trying to insert something that already exists .. but how do I stop Hibernate from Inserting?)
EDUCATION_SCHOOLS: when I try to update, sometimes it works, but often I get:
23:03:55,484 [http-8081-1] ERROR be.vlaanderen.lne.vea.epb.ui.struts.EpbExceptionHandler - org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Object of class [##.EducationSchools] with identifier [null]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [##.EducationSchools#<null>]
ex.getMessage() Object of class [##.EducationSchools] with identifier [null]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [##.EducationSchools#<null>]
org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Object of class [##.EducationSchools] with identifier [null]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [##.EducationSchools#<null>]
Caused by: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect):As you can see from the stacktrace I use Spring for the transactionManager: org.springframework.orm.hibernate3.HibernateTransactionManager in which I use e sessionFactory: org.springframework.orm.hibernate3.LocalSessionFactoryBean
In my DAO, I try to save with the regular this.getHibernateTemplate().saveOrUpdate that has always worked for me.
Another problem I have:
when i update "name" in EDUCATION, the records with that ID are delete from EDUCATION_SCHOOLS ...
As I am experiencing 3 different problems, I'm pretty sure something is wrong in the mapping files .. however I fail to find out what .. Any input would be greatly appreciated.
(I translated some class/table-names, that's what the ## cause)
Edited by: Bart_Blommaerts on Jul 29, 2008 11:53 PM

Thank you for your input.
When I try what you suggest, I still get the same error:
16:39:30,406 [http-8081-1] ERROR ###.EpbExceptionHandler - org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Object of class [###.EducationSchools] with identifier [2]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [###.EducationSchools#2]
ex.getMessage() Object of class [###.EducationSchools] with identifier [2]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [###.EducationSchools#2]
org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Object of class [###.EducationSchools] with identifier [2]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [###.EducationSchools#2]
Caused by: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [###.EducationSchools#2]If you had to map the database tables, I'm trying to map, how would you do it?

Problem in mapping a many to many relation to a list

Hi,
I have a problem with mapping a many to many relation to a list.
I have a Many to Many relation in my database between tables baskets and products. This relation is implemented with a join table basket_products, which has two fields which correspond to the foreign keys to tables baskets and products. The join table need to have another one column "order", which defines the order of the products for the specific basket.
In my mapping I have:
@Entity
@Table(name = "baskets", uniqueConstraints = {})
public class Components implements java.io.Serializable {
@ManyToMany(cascade = { CascadeType.ALL }, fetch = FetchType.LAZY)
     @JoinTable( name="baskets_products",
                         joinColumns=@JoinColumn(name="b_id", referencedColumnName="pr_id"),
                         inverseJoinColumns=@JoinColumn(name="pr_id", referencedColumnName="pr_id"))
        //This of course doesn't work!!
       //@OrderBy(value="order")
     public List<Products> getProductses() {
          return this.productses;
     public void setProductses(
               List<Products> productses) {
          this.productses = productses;
@Entity
@Table(name = "products", uniqueConstraints = { })
public class Products implements java.io.Serializable {
@ManyToMany(cascade = { CascadeType.ALL }, fetch = FetchType.LAZY, mappedBy = "productses")
     public Set<Baskets> getBasketses() {
          return this.basketses;
     public void setBasketses(Set<Basket> basketses) {
          this.basketses = basketses;
     }In the EJB spec I read that :
"The property or field name must correspond to that of a persistent property or field of the associated
class."
What to do if I want to use a field from the join table to do the ordering of the list??
My problem is that the field "order", is not defined to the EJB container as a persistent field, so it cannot be used. But for my needs it is necessary that this field is included in the join table.
I thought that I could use the secondary table annotation to map the join table to the Baskets class, as well, so that I can define the order field, but this solution seems to me as a really wrong one.
Can anyone help me??
Thanks,
Elenh.

Hi Martin-
Can you please help me. Here are the details:
We have created an AQ in Oracle DB which will have the following message Structure:
CREATE OR REPLACE TYPE enqueue_payload AS OBJECT
( field1 VARCHAR2(100),
field2 VARCHAR2(100),
field3 DATE,
field4 VARCHAR2(100),
field5 NUMBER,
payload CLOB,
In the Payload field we are enqueing an XML message.
We have to use a OSB proxy service to dequeue the message from the AQ, transform it to another format and send to a SOA Composite.
We created a AQ Adapter in Jdeveloper 11g and imported the WSDL, XSD and .jca jca binding file into the OSB project. And configured the OSB proxy service using the WSDL imported.
However in OSB proxy service message flow when I try to create an XQUERY transformation, I see that the Payload field does not expose the structure of the XML message that is being enqueued. I even changed the message structure definition to have the payload field as XMLType. But it didn't help.
On analyzing the XSD created by AQ Adapter, I see that the payload is being defined as "string" in the XSD.
Inputs Needed
=========
1. How can we parse the payload field defined as CLOB/XMLType in OSB so that I can see the structure of the XML message it holds ?
2. Is there any in-built function in OSB to convert it to XML ?
3. Any other inputs in order to transform the XML message coming in the payload field as CLOB/XMLType
Please provide your inputs and I hope that I have clearly explained my use case.
Thanks in advance for your time and help!!
Regards,
Dibya

Many to many relationship mapping.

Hi
I have a basic question on how to create a good java class model (POJOs) based on the database model.
I Have to follwing tables
Table1 with columns as
ID1
name
description
Table2 with columns as
ID2
dateCreated ..etc.
Since there is a many to many relationship between table1 and table2
So to map that we have a table3 with columns
ID3
ID1 // fk table1
ID2 // fk table2
browserName
startTime
endTime
So when I create Java classes:
// corresponding to table 1
Class MyTable1
private Integer ID1;
private List ID2; // to map with the table2
// corresponding to table 2
Class MyTable2
private Integer ID2
private List ID1; // to map with table 1
In this way I can create my classes. Is this the best way to put it together.
And where to put the attributed specific to table3. Like the BrowserName and the StartTime and the EndTime.
Any suggestion please.
Thanks.

Your names leave a lot to be desired. Let's start with an example. Suppose I have a problem involving employees and the tasks assigned to them. An employee may have any number of tasks assigned to them and a task can be assigned to any number of employees. The assignment itself has more attributes: when it was assigned, its priority and so on.
public interface Employee {
    Long getId(); //etc...
    Set<Assignment> getAssignments();
    void setAssignments(Set<Assignment> assignments);
public interface Task {
    Long getId(); //etc...
    Set<Assignment> getAssignments();
    void setAssignments(Set<Assignment> assignments);
public interface Assignment {
    Long getId(); //etc...
    Employee getEmployee();
    void setEmployee(Employee employee);
    Task getTask();
    void setTask(Task task);
}This assumes you want to navigate in all directions: from an employee to their assignments, from a task to its assignments and from an assignment to it employee and task.

Mapping issue, "many to many" mapping

Hi specialists!
I have to map this structure:
source
segment_1   (1...n)
key_1
aaa
bbb
segment_2   (1...n)
key_2
ccc
ddd
Target:
segment_2
ccc
ddd
The condition is segment_1=>key1 = segment_2=>key2
The problem is that I need to check each segment_1 with each segment_2.
Is it possible using standard mapping functions?

Dani_K,
This can be done with standard mapping if your source.segment_1.key_1 is unique.   If it is not, you could end up with a many to many mapping which would be difficult no matter how you map.
Try this:
For segment_2
source.segment_1.key_1 (right click, context, source) ---> sort --->
source.segment_2.key_2 (right click, context, source) ---> sort --->
equalsS --->   ifWithoutElse --->
source.segment_2 (then)
removeContexts (after the If Then)--->   target.segment_2
For ccc
source.segment_1.key_1 (right click, context, source) ---> sort --->
source.segment_2.key_2 (right click, context, source) ---> sort --->
equalsS --->   ifWithoutElse --->
source.segment_1.ccc (right click, context, source)     (then)
removeContexts (after the If Then)---> SplitByValue(Each Value) ---> target.segment_2.ccc
For ddd
source.segment_1.key_1 (right click, context, source) ---> sort --->
source.segment_2.key_2 (right click, context, source) ---> sort --->
equalsS --->   ifWithoutElse --->
source.segment_1.ddd (right click, context, source)     (then)
removeContexts (after the If Then)--->   SplitByValue(Each Value) ---> target.segment_2.ddd
Ideally, the segment_1.Key_1 and segment_2.key_2 are sorted before you process the message. If so, remove the sort above.

Many to One Mapping issue

Hi Experts,
I am currently facing issue with many to one mapping . I have a source schema called revenue having Profit and Profit GST which is looping multiple times. I need to copy the name,value and GST value for each type into the destination schema.
i am using Looping funtiod to create item profit records and than copying name and value from source to destination but the problem statement is that i am unable to map the GST value
Thanks
Abhishek

could you post the schema definition please
well why i am asking is, in General matching the records will be based on common node values in corresponding records.
Assume you have 2 records of Profit and 2 records of ProfitGST in the source message like below, you cannot match the records unless you have some value common in both the records. i mean there should be some common node or attribute value that exits in
both records.
assume the following sample with 2 records each
<ns0:Revenue xmlns:ns0="http://TestSample">
<ns0:profit availabilityIncentivePayment="342" increasedCapacityCharge ="121" increasedCapacaityPayment="231" />
<ns0:profit availabilityIncentivePayment="100" increasedCapacityCharge ="110" increasedCapacaityPayment="120" />
<ns0:profitGST availabilityIncentivePayment="55" increasedCapacityCharge ="21" increasedCapacaityPayment="23"/>
<ns0:profitGST availabilityIncentivePayment="150" increasedCapacityCharge ="160" increasedCapacaityPayment="170"/>
</ns0:Revenue>
if you observe the above sample instance, it does have 2 records each, but Profit record's nodes values
are no where common with ProftGST record's node values.
And for every Profit record, you want to pick corresponding GST value from ProfitGST record. However, since you don't have atleast one common node/attribute value here, you will not find a way to relate corresponding records. Means while mapping the first
record of Profit, it cannot decide which record's nodes values in the ProftGST should pick to match as there are 2 records of ProfitGSt and with no relation with Profit Records.
if the requirement is such that the records should be matched by the order(index) irrespective
or the values in them, then that can be achieved easily with postion() function in the for loop. just try to use code some thing like below sample xslt script like below, apply the proper name spaces and put full names as applicable in your scirpt, mould
it as per your need
<ns0:Root>
<xsl:for-each select="Profit">
<Profit>
<xsl:if test="@availabilityIncentivePayment">
<name>
name>availabilityIncentivePayment</name>
</name>
</xsl:if>
<xsl:if test="@increasedCapacityCharge">
<Value>
<xsl:value-of select="@increasedCapacityCharge" />
</Value>
</xsl:if>
<xsl:if test="../profitGST/@availabilityIncentivePayment">
<ProfitGSt>
<xsl:value-of select="../profitGST/@availabilityIncentivePayment[position()]" />
</ProfitGSt>
</xsl:if>
</Profit>
</xsl:for-each>
</ns0:Root>
Please mark the post as answer if this answers your question. If this post is helpful, please vote as helpful by clicking the upward arrow mark next to my reply.

Take2 - Many-to-Many mapping on a single object/table via an external table.

Plaease ignore the previous entry. Finger trouble on the keyboard
accidentally posted prior to completion!
Any takers on this one? If its simple, then great.
I currently have a problem making the correct meta-data via xdoclet for a
collection with a many-to-many mapping between an enhanced class and an
xref table (which does not have an enhanced class associated with it.)
Although page 184 of the Kodo JDO 3.01 Developers guide does spell out in
fairly academic terms what has to be done, it still seems fairly
impenetrable, after much mangling and hacking.
As far as I can see the significantly questionable attributes are:-
element-column.<pk column>*
and
ref-column.<pk column>*
The asterisks and the associated texts indicate that these entries can be
specified more than once.
Here is my Meta data.
* @jdo.field collection-type="collection"
element-type="com.letsys.erespond.business.model.event.Condition"
* @jdo.field-vendor-extension vendor-name="kodo" key="jdbc-field-map"
value="many-many"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/table" value="EventConditionConditionXref"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/element-column.ID" value="EVENTCONDITIONID"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/ref-column.EVENTCONDITIONID" value="ID"
private Collection groupsToConditions;
Here is the basic table which I wish to use for the xref
create table EventConditionConditionXref(
EventConditionId NUMBER(10) NOT NULL primary key,
EventConditionIdGroupTo NUMBER(10) NOT NULL primary key
The EventCondition class and table uses a field 'id' as its primary key.
The intention is the xref table will hold many-many associations between
multiple EventCondition.id instances in the underlying database.
Thus the joing condition would be :
select
EventConditionIdGroupTo
from
EventCondition ec, EventConditionConditionXref ecx
where
ec.id = ecx.EventConditionId
There are numerous variations that I have squeezed through it, but the net
effect has always been
BUILD FAILED
file:C:/dev/projectm/build.xml:303:
kodo.jdbc.meta.MappingInfoNotFoundException: The mapping for fie
ld "com.letsys.erespond.business.model.event.Condition.groupsToConditions"
is missing information on
how to link the fields table to its owning class table, or the given
information is invalid.
I have tried many interpretations as to how
element-column.<pk column>*
and
ref-column.<pk column>*
should be represented, but always with the same 'not enough info' message.
Am I missing something obvious, and/or not understanding something?
Cheers Ed.

Ed-
I think what you want is:
@jdo.field collection-type="collection"
element-type="com.letsys.erespond.business.model.event.Condition"
@jdo.field-vendor-extension vendor-name="kodo" key="jdbc-field-map"
value="many-many"
@jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/table" value="EventConditionConditionXref"
@jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/ref-column.ID" value="EVENTCONDITIONID"
@jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/element-column.ID" value="EVENTCONDITIONIDGROUPTO"
Basically, the "ref-column.<primary key>" specifies the column in the
join table that holds the primary key of the source side of the relation
(the current class), and the "element-column.<primary key>" specifies
the column in the join table that holds the primary key of the
destination side of the relation (the content of the Collection field).
Since it appears that you want the relation to be from Condition to
Condition (i.e., have a relation it itself), the primary key in both
cases will be the 'ID' column.
Let us know if you still have problems with this. You might want to
check out our graphical mapping workbench in 3.1, which helps greatly
simplify composing your mappings.
In article <[email protected]>, Ed Bett wrote:
Plaease ignore the previous entry. Finger trouble on the keyboard
accidentally posted prior to completion!
Any takers on this one? If its simple, then great.
I currently have a problem making the correct meta-data via xdoclet for a
collection with a many-to-many mapping between an enhanced class and an
xref table (which does not have an enhanced class associated with it.)
Although page 184 of the Kodo JDO 3.01 Developers guide does spell out in
fairly academic terms what has to be done, it still seems fairly
impenetrable, after much mangling and hacking.
As far as I can see the significantly questionable attributes are:-
element-column.<pk column>*
and
ref-column.<pk column>*
The asterisks and the associated texts indicate that these entries can be
specified more than once.
Here is my Meta data.
* @jdo.field collection-type="collection"
element-type="com.letsys.erespond.business.model.event.Condition"
* @jdo.field-vendor-extension vendor-name="kodo" key="jdbc-field-map"
value="many-many"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/table" value="EventConditionConditionXref"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/element-column.ID" value="EVENTCONDITIONID"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/ref-column.EVENTCONDITIONID" value="ID"
private Collection groupsToConditions;
Here is the basic table which I wish to use for the xref
create table EventConditionConditionXref(
EventConditionId NUMBER(10) NOT NULL primary key,
EventConditionIdGroupTo NUMBER(10) NOT NULL primary key
The EventCondition class and table uses a field 'id' as its primary key.
The intention is the xref table will hold many-many associations between
multiple EventCondition.id instances in the underlying database.
Thus the joing condition would be :
select
EventConditionIdGroupTo
from
EventCondition ec, EventConditionConditionXref ecx
where
ec.id = ecx.EventConditionId
There are numerous variations that I have squeezed through it, but the net
effect has always been
BUILD FAILED
file:C:/dev/projectm/build.xml:303:
kodo.jdbc.meta.MappingInfoNotFoundException: The mapping for fie
ld "com.letsys.erespond.business.model.event.Condition.groupsToConditions"
is missing information on
how to link the fields table to its owning class table, or the given
information is invalid.
I have tried many interpretations as to how
element-column.<pk column>*
and
ref-column.<pk column>*
should be represented, but always with the same 'not enough info' message.
Am I missing something obvious, and/or not understanding something?
Cheers Ed.
Marc Prud'hommeaux [email protected]
SolarMetric Inc. http://www.solarmetric.com

Many to many relationship problem

Hi folks!
I am having the following problem when mapping many-to-many relationships: "More than one writable many-to-many mapping cannot use the same relation table".
This is what I am doing: I have a class Person and a class Meeting. One Person has many meetings and one Meeting has many participants (person).
I did the M-to-M relationship for the class Person and it worked fine in the workbench. But when I tried to do it in the Meeting class the workbench complained with that error.
I believe it might be a problem with the source and target references but I couldn't figure out how to solve it.
If I check in the intermediate table there are only 2 references created.
Can anyone help?

Hello,
Firstly, think about object model consistency (without TopLink or other persistence layer at all): should you be changing one side (eg Person), adding a meeting, without changing the other side? Is that object model self-consistent? It doesn't appear so to me- I can navigate from meeting to person and not get the same results as navigating from person to meeting. All this is irrespective of the persistence layer.
TopLink, first and foremost, expects that your object model is self-consistent. If it is, then you will find that the problem you indicate is no longer a problem- if i update a person with a new meeting, i change the meeting to person relationship as well. This means that although one direction is read-only to TopLink, the other is not- so the data will be written.
I hope this helps,
Christian

Many-to-many mapping

Hello,
I would like to map many-to-many on two objects.
Also I want to keep relationship info in the table:
JDO_TEST_GROUP_RIGHT_LINKS
GROUPID | RIGHHTID
I have class "Right" and class "Group"
they ref. each other over collection.
e.g.
class Right
private String rightID; //key
private List groups;
public List getGroups()
class Group
private String groupID; //key
private List users;
public List getUsers()
here is my JDO metadata:
<class name="Right" identity-type="application"
objectid-class="Right$RightID">
<extension vendor-name="kodo" key="table" value="JDO_TEST_RIGHT"/>
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
<field name="rightID" primary-key="true">
<extension vendor-name="kodo" key="data-column" value="ID"/>
</field>
<field name="rightName">
<extension vendor-name="kodo" key="data-column" value="Name"/>
</field>
<field name="groups">
<collection element-type="Group"/>
<extension vendor-name="kodo" key="table"
value="JDO_TEST_GROUP_RIGHT_LINKS"/>
<extension vendor-name="kodo" key="groupid-data-column" value="GROUPID"/>
<extension vendor-name="kodo" key="rightid-ref-column" value="RIGHTID"/>
<extension vendor-name="kodo" key="inverse" value="rights"/>
</field>
</class>
<class name="Group" identity-type="application" objectid-class="GroupID">
<extension vendor-name="kodo" key="table" value="JDO_TEST_GROUP"/>
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
<field name="groupID" primary-key="true">
<extension vendor-name="kodo" key="data-column" value="name"/>
</field>
<field name="rights">
<collection element-type="Right"/>
<extension vendor-name="kodo" key="table"
value="JDO_TEST_GROUP_RIGHT_LINKS"/>
<extension vendor-name="kodo" key="rightid-data-column" value="RIGHTID"/>
<extension vendor-name="kodo" key="groupid-ref-column" value="GROUPID"/>
<extension vendor-name="kodo" key="inverse" value="groups"/>
</field>
</class>
BUT when table is created it has additional fields:
JDO_TEST_GROUP_RIGHT_LINKS
GROUPID | GROUP_GROUPSX | GROUPID_JDOIDX | RIGHTID_JDOIDX |
RIGHTID_RIGHTSX
Does anyone know what am I doing wrong? (I did it according documentation
on 2.4.1)
Also, tables for Group and Right have extra Kodo fields (JDOCLASSX,
JDOLOCKX)
but in METADATA I did specify:
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
Is anything else there to specify?
thanks in advance,
Ruslan Zenin

I'm guessing you meant to show List rights instead of List users...
You have to be case sensitive with your keys... e.g. rightID-ref-column,
groupID-ref-column.
Hope that solves your problem.
Ruslan Zenin wrote:
>
class Group
private String groupID; //key
private List users;
public List getUsers()
here is my JDO metadata:
<field name="groups">
<collection element-type="Group"/>
<extension vendor-name="kodo" key="table"
value="JDO_TEST_GROUP_RIGHT_LINKS"/>here...
<extension vendor-name="kodo" key="groupid-data-column" value="GROUPID"/>and here..
<extension vendor-name="kodo" key="rightid-ref-column" value="RIGHTID"/>
<extension vendor-name="kodo" key="inverse" value="rights"/>
</field>
</class>
<class name="Group" identity-type="application" objectid-class="GroupID">
<extension vendor-name="kodo" key="table" value="JDO_TEST_GROUP"/>
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
<field name="groupID" primary-key="true">
<extension vendor-name="kodo" key="data-column" value="name"/>
</field>
<field name="rights">
<collection element-type="Right"/>
<extension vendor-name="kodo" key="table"
value="JDO_TEST_GROUP_RIGHT_LINKS"/>again...
<extension vendor-name="kodo" key="rightid-data-column" value="RIGHTID"/>and one last time...
<extension vendor-name="kodo" key="groupid-ref-column" value="GROUPID"/>
<extension vendor-name="kodo" key="inverse" value="groups"/>
</field>
</class>
BUT when table is created it has additional fields:
JDO_TEST_GROUP_RIGHT_LINKS
GROUPID | GROUP_GROUPSX | GROUPID_JDOIDX | RIGHTID_JDOIDX |
RIGHTID_RIGHTSX
Does anyone know what am I doing wrong? (I did it according documentation
on 2.4.1)
Also, tables for Group and Right have extra Kodo fields (JDOCLASSX,
JDOLOCKX)
but in METADATA I did specify:
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
Is anything else there to specify?
thanks in advance,
Ruslan Zenin
Stephen Kim
[email protected]
SolarMetric, Inc.
http://www.solarmetric.com

Many-to-many mapping question

Hi,
I'm working with two classes Car and Customer. The Car class has a Vector of Customers and the Customer class has a Vector of Car. Both are related by a many to many mapping.
I have noticed that I have to set one of the vector to read only to avoid the error message "More than one writable many-to-many mapping can not use the same relation table" in the mapping workbench.
I can understand that but is there a way to work around, I mean to be able to add a car to a customer and add a customer to a car with the both vectors?
Is there something to do with the cache?
I use Vector for the collection or Map class, have I to do otherwise?

Hello Vladislav, I understand your first question in this thread, but I'm not sure I follow the rest, so let me respond to your first post:
"I have noticed that I have to set one of the vector to read only to avoid the error message "More than one writable many-to-many mapping can not use the same relation table" in the mapping workbench.
I can understand that but is there a way to work around, I mean to be able to add a car to a customer and add a customer to a car with the both vectors?"
The issue here is that with a Many to Many mapping the mapping is responsible for writing to the association table. So, you have a "CAR_CUST" association table. Imagine you add a Car "101" to a customer "501" and the requisite customer "501" to that car "101" in your object model. Then the association table should only be updated once, with an entry of "101, 501". But since the M-M is mapped in both directions, you need to tell TopLink which of these to consider as the "master" when updating the database.
If you didn't make one of the M-M mappings "read only", then TopLink would insert "101, 501" twice in the association table, and then at a later date you would see that the customer 501 had two 101 cars!
We do have a feature that allows for TopLink to maintain bidirectional relationships such that if you add or remove a target from one relationship, TopLink will automatically add/remove it from the opposite direction. In my opinion this is lazy programming! A good Java developer should insist on keeping his model up to date on his own. This feature was added because it's part of the EJB spec, not necessarily because it's a good idea ;)
- Don
Is there something to do with the cache?
I use Vector for the collection or Map class, have I to do otherwise?

I''m new to Mac, how do I install Adobe CD? I put it in the CD drive and get a menu, everything I click on goes nowhere. In Microsoft, I installed many programs with no problem

I''m new to Mac, how do I install Adobe CD? I put it in the CD drive and get a menu, everything I click on goes nowhere. In Microsoft, I installed many programs with no problem

Is the Adobe CD a MAC app ?
If it is a program for Windows you will not be able to install it.
If you nedd that program you can either buy the equivalent for Mac or install a way to run Windows under Mac (may be a cheaper solution)

Can't open iTunes, it said it has failed to start because MSVCR80.dll was not found, and I re-installed application many times and still problem persist, how do I solve this?

can't open iTunes, it said it has failed to start because MSVCR80.dll was not found, and I re-installed application many times and still problem persist, how do I solve this?

Try the following user tip:
Troubleshooting issues with iTunes for Windows updates

Problem in Many-to-Many Associations (JBO-27014 error)

I am facing a problem during insertion in an Intersection table.
I have 3 tables Customer, Accounts and Customer_Account. In order to implement the Many to Many relationship between Customer and Accounts, I created an intersection table Customer_Account.
Table Structure
CUSTOMER
Cust_id NUMBER NOT NULL PK
Name VARCHAR2(50) NOT NULL
ACCOUNT
Account_Id NUMBER NOT NULL PK,
Account_number NOT NULL,
Sort_Code NUMBER NOT NULL,
Account_Type VARCHAR2(10) NOT NULL
CUSTOMER_ACCOUNT
Cust_Id NUMBER NOT NULL,
Account_Id NUMBER NOT NULL
I created an Association CustAcctAsso between Customer and Account with Customer_Account as intersection entity. Then created a viewlink CustAcctViewLink with CustomerView as Source entity, AccountView as Destination entity and selected the CustAcctAsso as association.
I included this in the application module using the following steps
Selected AccountView via CustAcctViewLink in the Available view pane and selected CustomerView in Data model pane. Clicked > to add AccountView via CustAcctViewLink as a restricted view.
Also added CustomerView via CustAcctViewLink as a restricted view.
When I tried to insert data through the second restricted view I am getting an JBO 27014 Attribute Sort Code in Account is required.
It would be very helpful if someone gives me a solution quickly.
Thanks
Renuka

Thanks, now I am able to insert data into CUSTOMER and ACCOUNT table, but not in the intersection table.
It seems that we cannot do any insertion into the intersection table. Please advice me, this is urgent.OK here's what you need to do to insert a new row in both ACCOUNT and INTERSECTION tables.
1. Create a new viewobject with a join of INTERSECTION and ACCOUNT tables such that both are updateable but ACCOUNT is reference entity.
-- This is assuming you want to insert a new account when you insert a new account id in the intersection table otherwise, you can make ACCOUNT entity readonly as well.
2. Create a viewlink between Customer viewobject and this NewViewObject (1-* ViewLink).
3. If the assumption in step 1 is NOT to update/insert new Accounts form this VO, then you're done. Add the new viewobject usage in your application module and you should be able to use it to edit/insert intersection details.
Otherwise -
Set the Updateable flag on AccountID (from the Account entity usage in the NewViewObject) to "never" udpateable.
Set the Updateable flag on Other attributes from the Account entity usage in the NewViewObject to udpateable-while-new or always as desired.
4. Select to generate EntityDefImpl subclass for Account table and override the protected method createInstance as below:
protected EntityImpl createInstance(DBTransaction txn, AttributeList al)
    // TODO: Override this oracle.jbo.server.EntityDefImpl method
    return super.createInstance(txn, al);
}5. Select to generate a ViewRowImpl subclass with accessors for this NewViewObject
6. Add the following logic in setAccountID() method (assuming AccountId attribute is editable and from Intersection entity)
(Note you'll also have anothe attribute AccountId1 from Account entity which should be readonly as marked in step 3.)
//get the current intersection entity.
IntersectionImpl intersection = (IntersectionImpl)getEntity(1);
setAttributeInternal(ACCOUNTID1, value);
//if it is same as I added and is not the same as new one
//framework may assign a new intersection entity based on FK.
IntersectionImpl newIntersection = (IntersectionImpl)getEntity(1);
IntersectionDefImpl intersectiondef = (IntersectionDefImpl)IntersectionImpl.getDefinitionObject();
IntersectionEnrollmentImpl myVO = ((IntersectionEnrollmentImpl)getViewObject());
DBTransaction dbtxn = myVO.getDBTransaction();
//see if a intersection exists with this FK
intersection = (IntersectionImpl)intersectiondef.findByPrimaryKey(dbtxn, IntersectionImpl.createPrimaryKey(value));
//if this viewrow created a new intersection earlier which is different from
//the current intersection entity, remove the old one as I created it.
if ((intersectionAdded != null) && (intersection != intersectionAdded || newIntersection != intersectionAdded))
if (intersection == null)
    //if I added this intersection as new, reuse-it.
    intersection = intersectionAdded;
    intersection.setIntersectionid(value);
else
    //if I added this intersection as new, remove it.
    System.out.println(">>>>removing :"+intersectionAdded.getAttribute(0));
    intersectionAdded.remove();
    intersectionAdded = null;
if (intersection == null)
//if new intersection is null = no intersection exists with this key, then create a new one.
intersection = (IntersectionImpl)intersectiondef.createInstance(dbtxn, new AttributeListImpl());
intersection.setIntersectionid(value);
intersectionAdded = intersection;
setEntity(1, intersection);
myVO.notifyRowUpdated(findRowSetForRow(this), new ViewRowImpl[]{this}, new int[]{2,3});
else if (intersection != newIntersection)
//otherwise, create a set the new intersection entity as my intersection entity reference
setEntity(1, intersection);
myVO.notifyRowUpdated(findRowSetForRow(this), new ViewRowImpl[]{this}, new int[]{2,3});
}Now when you insert a new row in this NewViewObject, you can either enter a new Account or refer to an existing Account.
The setAccountId() method will automatically bring the Account details for existing accounts or create a new Account entity as in the above logic.

Toplink - Many-to-Many Mapping issue

Hi
I have the following tables
User
Place
Team
User : uid , name (where uid is primay key)
Place : uid , pid( where uid and pid are composite primary keys)
Team : tid , name , pid( where tid is primary key)
Here the following mappings :
one user is belongs to many places
one user have many teams( by place)
user have many teams
i have created many to many mapping between place(or user) and team tables using intermediate table user_team( uid ,tid). But when i try to retrieve the teams for user id then i m getting all the teams. Here i need to filter the teams by only place id instead getting all the teams.
For example:
if user id is belongs to place id 101 then i need to get only teams belongs to place id 101. But i m getting all the places(101,102) teams for same user id which belongs to place id 101.
Please help me out how i can create valide mapping between all the tables to retrieve valid data. i m using toplink workbench(10g - 9.0.4).

Your model seems confused, you may wish to re-think you model. It seems odd that a place would have a user id, seems more like it is a m-m join table between user and team, but then it should have a team id not a place id.
You can use a selectionCriteria() on a ManyToManyMapping to define complicated m-m joins, but you would probably be better re-thinking your model. What object model are you trying to do exactly? Go from there, then define your data-model.
-- James : http://www.eclipselink.org

Valueholderinterface - Many-to-Many mapping problem

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