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From "Pinaki Poddar" <ppod...@bea.com>
Subject RE: composite ID w/ another composite ID as a field
Date Tue, 03 Apr 2007 19:57:00 GMT
 > i can also pass along a maven2 project 
Can you post the Java source of the test case and domain classes for us
to reproduce the error? 

afaik, Application identity classes like PageId are not enhanced in
current versions, they used to be.


Pinaki Poddar
BEA Systems
415.402.7317  


-----Original Message-----
From: jeff [mailto:jeffrey.blattman@yahoo.com] 
Sent: Tuesday, April 03, 2007 11:57 AM
To: open-jpa-dev@incubator.apache.org
Subject: RE: composite ID w/ another composite ID as a field

thanks pinaki,

as a test, i removed Page.book as an @Id, and made the corresponding
change in PageId (removed the book field of type PageId). this caused
the class cast exception below to go away. so, it does appear to have
some relation of to the use of the composite ID within a composite ID,
although you're right it might be a completely different issue.

this is with a trunk (as of this morning) build of openjpa.

i have attached the log you asked for. nothing stood out. i can also
pass along a maven2 project that contains the test case that fails if
that helps. i can't see to attach it here directly though as apache's
spam filter doesn't like it. let me know.

thanks again.

Pinaki Poddar <ppoddar@bea.com> wrote:

	Jeff,
	1. The errors look rather unrelated to original problem of
composite
	id.
	2. The errors apparently caused by enviroment setup, so please
	a) get a clean 0.9.7 openjpa (either building locally from the
	source, or pre-built jars from the openjpa web-site)
	b) if the error persists, report with trace-level logging
	(property name="openjpa.Log" value="DefaultLevel=TRACE"/> 
	and complete stack trace.
	
	
	
	
	Pinaki Poddar
	BEA Systems
	415.402.7317 
	
	
	-----Original Message-----
	From: jeff [mailto:jeffrey.blattman@yahoo.com] 
	Sent: Monday, April 02, 2007 4:12 PM
	To: open-jpa-dev@incubator.apache.org
	Subject: RE: composite ID w/ another composite ID as a field
	
	thanks pinaki,
	
	after making those changes, on 0.9.6, i get:
	
	Caused by: java.lang.ClassCastException:
	org.apache.openjpa.util.ObjectId
	at com.mycompany.book.Page.pcCopyKeyFieldsToObjectId(Page.java)
	at
	
org.apache.openjpa.util.ApplicationIds.create(ApplicationIds.java:383)
	at
	
org.apache.openjpa.kernel.BrokerImpl.persist(BrokerImpl.java:2349)
	
	i built the trunk locally, and mvn installed it into my local
	repository. when i run against it, i get:
	
	Caused by: java.lang.RuntimeException: There were errors
initializing
	your configuration: org.apache.openjpa.lib.util.ParseException:
	Instantiation of plugin "QueryCompilationCache" with value
"true" caused
	an error "java.lang.IllegalArgumentException:
	java.lang.ClassNotFoundException:
org.apache.openjpa.util.CacheMap". The
	alias or class name may have been misspelled (as it closely
matches the
	valid plugin alias "true"), or the class may not be available in
the
	class path. Valid aliases for this plugin are: [all, false,
true]
	
	followed by:
	
	Caused by: java.lang.IllegalArgumentException:
	java.lang.ClassNotFoundException:
org.apache.openjpa.util.CacheMap
	at serp.util.Strings.toClass(Strings.java:211)
	at serp.util.Strings.toClass(Strings.java:140)
	at
	
org.apache.openjpa.lib.conf.Configurations.newInstance(Configurations.ja
	va:191)
	
	are there known issues w/ 0.9.7? what i don't understand is that
	...CacheMap is in the sample place, in the same JAR as w/ the
0.9.6
	dependency, just in my local repository.
	
	also odd is that i only see the one info message during
enhancement:
	
	[java] 1268 book INFO [main] openjpa.Tool - No targets were
	given. Running on all classes in your persistent classes list,
or all
	metadata files in classpath directories if you have not listed
your
	persistent classes. Use -help to display tool usage information.
	
	no details are printed about the classes being enhanced.
obviously this
	was working in version 0,9.6.
	
	any ideas?
	
	Pinaki Poddar wrote: Hello Jeff,
	
	OpenJPA supports the cited example where Page using a composite
ID which
	in turn refers to Book's composite ID. 
	
	Book/Page/Library classes work with
	a) openjpa-0.9.7 (do not know whether observed errors are due to
usage
	of earlier 0.9.6 version)
	b) following modifications in Page.book field (with a + sign)
	
	@Id
	@Column(nullable = false)
	@ManyToOne (cascade = CascadeType.ALL)
	+ @JoinColumns({
	+ @JoinColumn(name="book_library_LIBRARY_NAME",
	referencedColumnName="library_LIBRARY_NAME"),
	+ @JoinColumn(name="book_BOOK_NAME",
	referencedColumnName="BOOK_NAME")
	})
	private Book book;
	
	
	where the JoinColumns specification refers to following schema
(as per
	your Page/Book/Library class annotations):
	
	mysql> desc book;
	
+----------------------+--------------+------+-----+---------+-------+
	| Field | Type | Null | Key | Default | Extra |
	
+----------------------+--------------+------+-----+---------+-------+
	| library_LIBRARY_NAME | varchar(255) | NO | PRI | NULL | |
	| BOOK_NAME | varchar(255) | NO | PRI | NULL | |
	
+----------------------+--------------+------+-----+---------+-------+
	mysql> desc page;
	
+---------------------------+--------------+------+-----+---------+-----
	--+
	| Field | Type | Null | Key | Default |
	Extra |
	
+---------------------------+--------------+------+-----+---------+-----
	--+
	| book_library_LIBRARY_NAME | varchar(255) | NO | PRI | NULL |
	|
	| book_BOOK_NAME | varchar(255) | NO | PRI | NULL |
	|
	| PAGE_NUMBER | int(11) | NO | PRI | NULL |
	|
	
+---------------------------+--------------+------+-----+---------+-----
	--+
	
	
	Without explicitly naming the join columns, following error is
	generated:
	
	Caused by: <4|true|0.9.7-incubating-SNAPSHOT>
	org.apache.openjpa.persistence.ArgumentException:
"crxxx.Page.book" does
	not supply a name for at least one declared column. Since this
mapping
	can involve multiple columns or uses constant joins, each column
must
	give either its name or a non-constant target.
	at
	
org.apache.openjpa.jdbc.meta.MappingInfo.mergeJoinColumn(MappingInfo.jav
	a:1372)
	at
	
org.apache.openjpa.jdbc.meta.MappingInfo.createJoins(MappingInfo.java:11
	86)
	at
	
org.apache.openjpa.jdbc.meta.MappingInfo.createForeignKey(MappingInfo.ja
	va:948)
	at
	
org.apache.openjpa.jdbc.meta.ValueMappingInfo.getTypeJoin(ValueMappingIn
	fo.java:101)
	at
	
org.apache.openjpa.jdbc.meta.strats.RelationFieldStrategy.map(RelationFi
	eldStrategy.java:144)
	at
	
org.apache.openjpa.jdbc.meta.FieldMapping.setStrategy(FieldMapping.java:
	117)
	at
	
org.apache.openjpa.jdbc.meta.RuntimeStrategyInstaller.installStrategy(Ru
	ntimeStrategyInstaller.java:77)
	at
	
org.apache.openjpa.jdbc.meta.FieldMapping.resolveMapping(FieldMapping.ja
	va:435)
	at
	
org.apache.openjpa.jdbc.meta.FieldMapping.resolve(FieldMapping.java:400)
	at
	
org.apache.openjpa.jdbc.meta.ClassMapping.resolveNonRelationMappings(Cla
	ssMapping.java:810)
	at
	
org.apache.openjpa.jdbc.meta.MappingRepository.prepareMapping(MappingRep
	ository.java:316)
	at
	
org.apache.openjpa.meta.MetaDataRepository.preMapping(MetaDataRepository
	.java:602)
	at
	
org.apache.openjpa.meta.MetaDataRepository.resolve(MetaDataRepository.ja
	va:489)
	... 24 more
	NestedThrowables:
	<4|true|0.9.7-incubating-SNAPSHOT>
	org.apache.openjpa.persistence.ArgumentException: Field
	"crxxx.Book.pages" declares "crxxx.Page.book" as its mapped-by
field,
	but this field is not a direct relation.
	at
	
org.apache.openjpa.jdbc.meta.strats.RelationToManyInverseKeyFieldStrateg
	y.map(RelationToManyInverseKeyFieldStrategy.java:123)
	at
	
org.apache.openjpa.jdbc.meta.strats.RelationCollectionInverseKeyFieldStr
	ategy.map(RelationCollectionInverseKeyFieldStrategy.java:92)
	at
	
org.apache.openjpa.jdbc.meta.FieldMapping.setStrategy(FieldMapping.java:
	117)
	at
	
org.apache.openjpa.jdbc.meta.RuntimeStrategyInstaller.installStrategy(Ru
	ntimeStrategyInstaller.java:77)
	at
	
org.apache.openjpa.jdbc.meta.FieldMapping.resolveMapping(FieldMapping.ja
	va:435)
	at
	
org.apache.openjpa.jdbc.meta.FieldMapping.resolve(FieldMapping.java:400)
	at
	
org.apache.openjpa.jdbc.meta.ClassMapping.resolveMapping(ClassMapping.ja
	va:781)
	at
	
org.apache.openjpa.meta.ClassMetaData.resolve(ClassMetaData.java:1570)
	...
	
	
	Pinaki Poddar
	BEA Systems
	415.402.7317 
	
	
	-----Original Message-----
	From: jeff [mailto:jeffrey.blattman@yahoo.com]
	Sent: Monday, April 02, 2007 12:42 PM
	To: open-jpa-dev@incubator.apache.org
	Subject: composite ID w/ another composite ID as a field
	
	say i have Library, Book, and Page classes. a Library has many
Books,
	and a Book has many Pages. A Library's ID is it's name (simple).
A
	Book's ID is a composite of it's name and it's owning Library's
name
	(bidirectional relationship). A Page's ID is a composite of it's
number
	and it's owning Book's ID, a BookID.
	
	so, the PageId class starts like:
	
	public class PageId implements Serializable {
	private int number;
	private BookId book;
	
	the error i'm getting is at runtime ...
	
	<4|true|0.9.6-incubating>
	org.apache.openjpa.persistence.ArgumentException: Field
	"com.mycompany.book.Book.pages" declares
"com.mycompany.book.Page.book"
	as its mapped-by field, but this field is not a direct relation.
	
	first, is what i'm trying to do even valid? i suspect it is not,
and the
	problem is that the fields of the ID class must be "simple"
types (i
	believe the spec demands that). although, the error message is a
little
	confusing so i am not sure.
	
	it occurs to me that another way to achieve this would be to add
	bookName and libraryName fields to the Page class, and add a
@PrePersist
	method that populates them by calling book.getName() and
	book.getLibrary().getName(). but again this is messy because
that data
	is already in the table because of the bidirectional
relationship
	between the objects.
	
	as always, i'm open to "what are you an idiot?" responses if i
am just
	going about trying to define the Library, Book, Page
relationship in an
	obtuse manner.
	
	classes attached.
	
	
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