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From jpa_user <kommaraju.srini...@gmail.com>
Subject RE: composite ID w/ another composite ID as a field
Date Fri, 18 Jul 2008 09:18:44 GMT

Hi,
I am using OpenJPA version 1.1.0. I have a scenario which is similar to the
example being discussed in this thread(Library,Book,Page) So I tried to run
the  example as being discussed in the thread and getting Null Pointer
Exception.Stack trace is below:
I want to know whether this is an issue to be fixed in JPA or am I doing
something wrong?

Exception:
16  domain  TRACE  [main] openjpa.Runtime - Setting the following properties
from
"file:/E:/Workspaces/CIS_JPA/jpa-composite-key/build/META-INF/persistence.xml"
into configuration: {java.ext.dirs=E:\IBM\WID61\jdk\jre\lib\ext,
openjpa.MetaDataFactory=jpa(Types=com.ibm.bookstore.Book;com.ibm.bookstore.BookId;com.ibm.bookstore.Library;com.ibm.bookstore.Page;com.ibm.bookstore.PageId),
openjpa.Id=domain, java.runtime.version=pwi32devifx-20070323 (ifix 117674:
SR4 + 116644 + 114941 + 116110 + 114881),
openjpa.ConnectionPassword=password-1, openjpa.BrokerFactory=jdbc,
user.country=US, file.separator=\, java.jcl.version=20070131,
openjpa.ConnectionDriverName=com.ibm.db2.jcc.DB2Driver, java.vm.version=2.3,
sun.java2d.fontpath=, line.separator=
, java.compiler=j9jit23, user.dir=E:\Workspaces\CIS_JPA\jpa-composite-key,
sun.io.unicode.encoding=UnicodeLittle, com.ibm.cpu.endian=little,
user.variant=, java.specification.name=Java Platform API Specification,
java.vm.specification.name=Java Virtual Machine Specification,
java.specification.vendor=Sun Microsystems Inc., path.separator=;,
sun.arch.data.model=32, ibm.signalhandling.sigchain=true, os.name=Windows
XP, sun.boot.library.path=E:\IBM\WID61\jdk\jre\bin, sun.jnu.encoding=Cp1252,
openjpa.ConnectionUserName=db2admin, os.version=5.1 build 2600 Service Pack
2, user.name=Administrator, awt.toolkit=sun.awt.windows.WToolkit,
ibm.signalhandling.rs=false, com.ibm.util.extralibs.properties=,
java.awt.fonts=, java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment,
java.library.path=E:\IBM\WID61\jdk\jre\bin;.;E:\apacheant\ant\bin;E:\IBM\WID61\jdk\bin;C:\Program
Files\Common Files\NetSarang;C:\Program
Files\Edifecs\XEngine\Bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;E:\Program
Files\Rational\ClearCase\bin;E:\Program
Files\Rational\common;C:\SDP\6.0\runtimes\base_v6\java\bin;E:\PROGRA~1\IBM\SQLLIB\BIN;E:\PROGRA~1\IBM\SQLLIB\FUNCTION;E:\PROGRA~1\IBM\SQLLIB\SAMPLES\REPL;C:\Program
Files\Sun\MessageQueue3\bin;C:\Program Files\cvsnt;C:\Program
Files\IBM\WebSphere Transformation Extender
8.1\;E:\IBM\WBModeler61\WBModeler61\plugins\org.jawin_1.0.19\jawin.dll;E:\IBM\WBModeler61\CBM\plugins\org.jawin_1.0.19\jawin.dll;C:\WBModeler61\plugins\org.jawin_1.0.19\jawin.dll;E:\IBM\SQLLIBS\BIN;E:\IBM\SQLLIBS\FUNCTION;E:\IBM\SQLLIBS\SAMPLES\REPL;E:\apacheant\ant\bin;C:\jwsdp-1.1\jwsdp-shared\bin;C:\CVSNT;c:\maven-2.0.4\bin,
invokedviajava=, java.vm.specification.version=1.0, com.ibm.vm.bitmode=32,
com.ibm.oti.vm.library.version=23, user.timezone=, java.vm.info=J2RE 1.5.0
IBM J9 2.3 Windows XP x86-32 j9vmwi3223ifx-20070323 (JIT enabled)
J9VM - 20070322_12058_lHdSMR
JIT  - 20070109_1805ifx3_r8
GC   - WASIFIX_2007, ibm.system.encoding=Cp1252,
javax.persistence.provider=org.apache.openjpa.persistence.PersistenceProviderImpl,
sun.boot.class.path=E:\IBM\WID61\jdk\jre\lib\vm.jar;E:\IBM\WID61\jdk\jre\lib\core.jar;E:\IBM\WID61\jdk\jre\lib\charsets.jar;E:\IBM\WID61\jdk\jre\lib\graphics.jar;E:\IBM\WID61\jdk\jre\lib\security.jar;E:\IBM\WID61\jdk\jre\lib\ibmpkcs.jar;E:\IBM\WID61\jdk\jre\lib\ibmorb.jar;E:\IBM\WID61\jdk\jre\lib\ibmcfw.jar;E:\IBM\WID61\jdk\jre\lib\ibmorbapi.jar;E:\IBM\WID61\jdk\jre\lib\ibmjcefw.jar;E:\IBM\WID61\jdk\jre\lib\ibmjgssprovider.jar;E:\IBM\WID61\jdk\jre\lib\ibmjsseprovider2.jar;E:\IBM\WID61\jdk\jre\lib\ibmjaaslm.jar;E:\IBM\WID61\jdk\jre\lib\ibmjaasactivelm.jar;E:\IBM\WID61\jdk\jre\lib\ibmcertpathprovider.jar;E:\IBM\WID61\jdk\jre\lib\server.jar;E:\IBM\WID61\jdk\jre\lib\xml.jar,
openjpa.ConnectionURL=jdbc:db2://9.126.192.29:50001/JPA_MSG,
java.util.prefs.PreferencesFactory=java.util.prefs.WindowsPreferencesFactory,
java.runtime.name=Java(TM) 2 Runtime Environment, Standard Edition,
java.home=E:\IBM\WID61\jdk\jre,
java.class.path=E:\Workspaces\CIS_JPA\jpa-composite-key\build;E:\IBM\SQLLIB\java\sqlj.zip;E:\IBM\SQLLIB\java\Common.jar;E:\IBM\SQLLIB\java\db2java.zip;E:\IBM\SQLLIB\java\db2jcc.jar;E:\IBM\SQLLIB\java\db2jcc_license_cu.jar;E:\IBM\SQLLIB\java\db2policy.jar;E:\IBM\SQLLIB\java\db2qgjava.jar;E:\IBM\SQLLIB\java\db2umplugin.jar;E:\klp\Tech\JPA\apache-openjpa-1.1.0-binary\apache-openjpa-1.1.0\openjpa-1.1.0.jar;E:\klp\Tech\JPA\apache-openjpa-1.1.0-binary\apache-openjpa-1.1.0\lib\serp-1.13.1.jar;E:\klp\Tech\JPA\apache-openjpa-1.1.0-binary\apache-openjpa-1.1.0\lib\commons-collections-3.2.jar;E:\klp\Tech\JPA\apache-openjpa-1.1.0-binary\apache-openjpa-1.1.0\lib\commons-lang-2.1.jar;E:\klp\Tech\JPA\apache-openjpa-1.1.0-binary\apache-openjpa-1.1.0\lib\geronimo-jpa_3.0_spec-1.0.jar;E:\klp\Tech\JPA\apache-openjpa-1.1.0-binary\apache-openjpa-1.1.0\lib\geronimo-jta_1.1_spec-1.1.jar,
user.home=C:\Documents and Settings\Administrator,
com.ibm.oti.jcl.build=20070221_1314, java.specification.version=1.5,
os.arch=x86, java.awt.printerjob=sun.awt.windows.WPrinterJob,
java.vm.specification.vendor=Sun Microsystems Inc.,
com.ibm.oti.vm.bootstrap.library.path=E:\IBM\WID61\jdk\jre\bin,
java.fullversion=J2RE 1.5.0 IBM J9 2.3 Windows XP x86-32
j9vmwi3223ifx-20070323 (JIT enabled)
J9VM - 20070322_12058_lHdSMR
JIT  - 20070109_1805ifx3_r8
GC   - WASIFIX_2007, os.encoding=UTF8, user.language=en,
jxe.lowest.romimage.version=9, java.vm.name=IBM J9 VM,
java.class.version=49.0, java.vendor.url=http://www.ibm.com/,
java.vendor=IBM Corporation, java.vm.vendor=IBM Corporation,
java.io.tmpdir=C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\, java.version=1.5.0,
openjpa.Log=DefaultLevel=TRACE, Runtime=TRACE, Tool=TRACE,
com.ibm.oti.configuration=scar, file.encoding=Cp1252,
ibm.signalhandling.sigint=true, java.assistive=ON,
jxe.current.romimage.version=9}
110  domain  INFO   [main] openjpa.Runtime - Starting OpenJPA 1.1.0
110  domain  TRACE  [main] openjpa.Runtime - Properties: openjpa.AutoDetach: 
openjpa.MetaDataFactory:
jpa(Types=com.ibm.bookstore.Book;com.ibm.bookstore.BookId;com.ibm.bookstore.Library;com.ibm.bookstore.Page;com.ibm.bookstore.PageId)
openjpa.EntityManagerFactory: default
openjpa.ProxyManager: default
openjpa.jdbc.EagerFetchMode: parallel
openjpa.DataCache: false
openjpa.LockTimeout: -1
openjpa.Id: domain
openjpa.QueryCache: true
openjpa.ConnectionPassword: password-1
openjpa.BrokerImpl: default
openjpa.BrokerFactory: jdbc
openjpa.Compatibility: default
openjpa.FetchGroups: default
openjpa.ConnectionDriverName: com.ibm.db2.jcc.DB2Driver
openjpa.QueryCompilationCache: true
openjpa.DataCacheTimeout: -1
openjpa.NontransactionalWrite: true
openjpa.RetryClassRegistration: false
openjpa.jdbc.TransactionIsolation: default
openjpa.Multithreaded: false
openjpa.TransactionMode: local
openjpa.ConnectionRetainMode: on-demand
openjpa.AutoClear: datastore
openjpa.Sequence: table
openjpa.jdbc.Schemas: 
openjpa.WriteLockLevel: write
openjpa.MetaDataRepository: default
openjpa.DynamicDataStructs: false
openjpa.ConnectionUserName: db2admin
openjpa.RetainState: true
openjpa.Optimistic: true
openjpa.jdbc.ResultSetType: forward-only
openjpa.LockManager: version
openjpa.RestoreState: immutable
openjpa.jdbc.SynchronizeMappings: false
openjpa.RuntimeUnenhancedClasses: supported
openjpa.jdbc.FetchDirection: forward
openjpa.InverseManager: false
openjpa.jdbc.LRSSize: query
openjpa.ConnectionURL: jdbc:db2://9.126.192.29:50001/JPA_MSG
openjpa.jdbc.SQLFactory: default
openjpa.DataCacheManager: default
openjpa.MaxFetchDepth: -1
openjpa.NontransactionalRead: true
openjpa.jdbc.MappingDefaults: jpa
openjpa.ReadLockLevel: read
openjpa.ClassResolver: default
openjpa.FlushBeforeQueries: true
openjpa.FetchBatchSize: -1
openjpa.SavepointManager: in-mem
openjpa.ManagedRuntime: auto
openjpa.IgnoreChanges: false
openjpa.jdbc.SchemaFactory: dynamic
openjpa.ConnectionFactoryMode: local
openjpa.OrphanedKeyAction: log
openjpa.jdbc.SubclassFetchMode: join
openjpa.jdbc.UpdateManager: default
openjpa.Log: DefaultLevel=TRACE, Runtime=TRACE, Tool=TRACE
openjpa.jdbc.DriverDataSource: simple
openjpa.DetachState: loaded
110  domain  TRACE  [main] openjpa.Runtime - No cache marshaller found for
id org.apache.openjpa.conf.MetaDataCacheMaintenance.
219  domain  TRACE  [main] openjpa.MetaData - Using metadata factory
"org.apache.openjpa.persistence.jdbc.PersistenceMappingFactory@34723472".
266  domain  INFO   [main] openjpa.jdbc.JDBC - Using dictionary class
"org.apache.openjpa.jdbc.sql.DB2Dictionary".
985  domain  TRACE  [main] openjpa.jdbc.JDBC - catalogSeparator: .
catalogTerm: null
databaseProductName: DB2/NT
databaseProductVersion: SQL09050
driverName: IBM DB2 JDBC Universal Driver Architecture
driverVersion: 3.50.152
extraNameCharacters: @#
identifierQuoteString: "
numericFunctions:
ABS,ACOS,ASIN,ATAN,ATAN2,CEILING,COS,COT,DEGREES,EXP,FLOOR,LOG,LOG10,MOD,POWER,RADIANS,RAND,ROUND,SIGN,SIN,SQRT,TAN,TRUNCATE
procedureTerm: stored procedure
schemaTerm: schema
searchStringEscape: \
sqlKeywords:
AFTER,ALIAS,ALLOW,APPLICATION,ASSOCIATE,ASUTIME,AUDIT,AUX,AUXILIARY,BEFORE,BINARY,BUFFERPOOL,CACHE,CALL,CALLED,CAPTURE,CARDINALITY,CCSID,CLUSTER,COLLECTION,COLLID,COMMENT,CONCAT,CONDITION,CONTAINS,COUNT_BIG,CURRENT_LC_CTYPE,CURRENT_PATH,CURRENT_SERVER,CURRENT_TIMEZONE,CYCLE,DATA,DATABASE,DAYS,DB2GENERAL,DB2GENRL,DB2SQL,DBINFO,DEFAULTS,DEFINITION,DETERMINISTIC,DISALLOW,DO,DSNHATTR,DSSIZE,DYNAMIC,EACH,EDITPROC,ELSEIF,ENCODING,END-EXEC1,ERASE,EXCLUDING,EXIT,FENCED,FIELDPROC,FILE,FINAL,FREE,FUNCTION,GENERAL,GENERATED,GRAPHIC,HANDLER,HOLD,HOURS,IF,INCLUDING,INCREMENT,INDEX,INHERIT,INOUT,INTEGRITY,ISOBID,ITERATE,JAR,JAVA,LABEL,LC_CTYPE,LEAVE,LINKTYPE,LOCALE,LOCATOR,LOCATORS,LOCK,LOCKMAX,LOCKSIZE,LONG,LOOP,MAXVALUE,MICROSECOND,MICROSECONDS,MINUTES,MINVALUE,MODE,MODIFIES,MONTHS,NEW,NEW_TABLE,NOCACHE,NOCYCLE,NODENAME,NODENUMBER,NOMAXVALUE,NOMINVALUE,NOORDER,NULLS,NUMPARTS,OBID,OLD,OLD_TABLE,OPTIMIZATION,OPTIMIZE,OUT,OVERRIDING,PACKAGE,PARAMETER,PART,PARTITION,PATH,PIECESIZE,PLAN,PRIQTY,PROGRAM,PSID,QUERYNO,READS,RECOVERY,REFERENCING,RELEASE,RENAME,REPEAT,RESET,RESIGNAL,RESTART,RESULT,RESULT_SET_LOCATOR,RETURN,RETURNS,ROUTINE,ROW,RRN,RUN,SAVEPOINT,SCRATCHPAD,SECONDS,SECQTY,SECURITY,SENSITIVE,SIGNAL,SIMPLE,SOURCE,SPECIFIC,SQLID,STANDARD,START,STATIC,STAY,STOGROUP,STORES,STYLE,SUBPAGES,SYNONYM,SYSFUN,SYSIBM,SYSPROC,SYSTEM,TABLESPACE,TRIGGER,TYPE,UNDO,UNTIL,VALIDPROC,VARIABLE,VARIANT,VCAT,VOLUMES,WHILE,WLM,YEARS
stringFunctions:
ASCII,CHAR,CONCAT,DIFFERENCE,INSERT,LCASE,LEFT,LENGTH,LOCATE,LTRIM,REPEAT,REPLACE,RIGHT,RTRIM,SOUNDEX,SPACE,SUBSTRING,UCASE
systemFunctions: 
timeDateFunctions:
DAYNAME,DAYOFWEEK,DAYOFYEAR,HOUR,MINUTE,MONTH,MONTHNAME,QUARTER,SECOND,TIMESTAMPDIFF,WEEK,YEAR,CURDATE,CURTIME,NOW
url: jdbc:db2://9.126.192.29:50001/JPA_MSG
userName: db2admin
defaultTransactionIsolation: 2
driverMajorVersion: 3
driverMinorVersion: 50
maxBinaryLiteralLength: 4000
maxCatalogNameLength: 8
maxCharLiteralLength: 32672
maxColumnNameLength: 128
maxColumnsInGroupBy: 1012
maxColumnsInIndex: 16
maxColumnsInOrderBy: 1012
maxColumnsInSelect: 1012
maxColumnsInTable: 1012
maxConnections: 0
maxCursorNameLength: 128
maxIndexLength: 1024
maxProcedureNameLength: 128
maxRowSize: 32677
maxSchemaNameLength: 128
maxStatementLength: 2097152
maxStatements: 0
maxTableNameLength: 128
maxTablesInSelect: 0
maxUserNameLength: 30
isCatalogAtStart: true
isReadOnly: false
nullPlusNonNullIsNull: true
nullsAreSortedAtEnd: false
nullsAreSortedAtStart: false
nullsAreSortedHigh: true
nullsAreSortedLow: false
storesLowerCaseIdentifiers: false
storesLowerCaseQuotedIdentifiers: false
storesMixedCaseIdentifiers: false
storesMixedCaseQuotedIdentifiers: false
storesUpperCaseIdentifiers: true
storesUpperCaseQuotedIdentifiers: false
supportsAlterTableWithAddColumn: true
supportsAlterTableWithDropColumn: false
supportsANSI92EntryLevelSQL: true
supportsANSI92FullSQL: false
supportsANSI92IntermediateSQL: false
supportsCatalogsInDataManipulation: false
supportsCatalogsInIndexDefinitions: false
supportsCatalogsInPrivilegeDefinitions: false
supportsCatalogsInProcedureCalls: false
supportsCatalogsInTableDefinitions: false
supportsColumnAliasing: true
supportsConvert: false
supportsCoreSQLGrammar: true
supportsCorrelatedSubqueries: true
supportsDataDefinitionAndDataManipulationTransactions: true
supportsDataManipulationTransactionsOnly: false
supportsDifferentTableCorrelationNames: false
supportsExpressionsInOrderBy: true
supportsExtendedSQLGrammar: true
supportsFullOuterJoins: true
supportsGroupBy: true
supportsGroupByBeyondSelect: true
supportsGroupByUnrelated: true
supportsIntegrityEnhancementFacility: true
supportsLikeEscapeClause: true
supportsLimitedOuterJoins: true
supportsMinimumSQLGrammar: true
supportsMixedCaseIdentifiers: false
supportsMixedCaseQuotedIdentifiers: true
supportsMultipleResultSets: true
supportsMultipleTransactions: true
supportsNonNullableColumns: true
supportsOpenCursorsAcrossCommit: true
supportsOpenCursorsAcrossRollback: false
supportsOpenStatementsAcrossCommit: true
supportsOpenStatementsAcrossRollback: true
supportsOrderByUnrelated: true
supportsOuterJoins: true
supportsPositionedDelete: true
supportsPositionedUpdate: true
supportsSchemasInDataManipulation: true
supportsSchemasInIndexDefinitions: true
supportsSchemasInPrivilegeDefinitions: true
supportsSchemasInProcedureCalls: true
supportsSchemasInTableDefinitions: true
supportsSelectForUpdate: true
supportsStoredProcedures: true
supportsSubqueriesInComparisons: true
supportsSubqueriesInExists: true
supportsSubqueriesInIns: true
supportsSubqueriesInQuantifieds: true
supportsTableCorrelationNames: true
supportsTransactions: true
supportsUnion: true
supportsUnionAll: true
usesLocalFilePerTable: false
usesLocalFiles: false
allProceduresAreCallable: false
allTablesAreSelectable: false
dataDefinitionCausesTransactionCommit: false
dataDefinitionIgnoredInTransactions: false
doesMaxRowSizeIncludeBlobs: false
supportsBatchUpdates: true
1000  domain  TRACE  [main] openjpa.jdbc.JDBC - <t 1096171862, conn
420223244> [0 ms] close
1094  domain  TRACE  [main] openjpa.MetaData - Scanning resource
"META-INF/orm.xml" for persistent types.
1094  domain  TRACE  [main] openjpa.MetaData - parsePersistentTypeNames()
found [com.ibm.bookstore.Library, com.ibm.bookstore.Page,
com.ibm.bookstore.PageId, com.ibm.bookstore.Book, com.ibm.bookstore.BookId].
1094  domain  TRACE  [main] openjpa.MetaData - Found 5 classes with metadata
in 0 milliseconds.
1125  domain  INFO   [main] openjpa.Enhance - Creating subclass for "[class
com.ibm.bookstore.Library, class com.ibm.bookstore.Page, class
com.ibm.bookstore.PageId, class com.ibm.bookstore.Book, class
com.ibm.bookstore.BookId]". This means that your application will be less
efficient and will consume more memory than it would if you ran the OpenJPA
enhancer. Additionally, lazy loading will not be available for one-to-one
and many-to-one persistent attributes in types using field access; they will
be loaded eagerly instead.
1235  domain  TRACE  [main] openjpa.Runtime - No cache marshaller found for
id org.apache.openjpa.conf.MetaDataCacheMaintenance.
1235  domain  TRACE  [main] openjpa.MetaData - Using metadata factory
"org.apache.openjpa.persistence.jdbc.PersistenceMappingFactory@2120212".
1235  domain  TRACE  [main] openjpa.MetaData - Loading metadata for "class
com.ibm.bookstore.Library" under mode "[META]".
1235  domain  TRACE  [main] openjpa.MetaData - Scanning resource
"META-INF/orm.xml" for persistent types.
1235  domain  TRACE  [main] openjpa.MetaData - parsePersistentTypeNames()
found [com.ibm.bookstore.Library, com.ibm.bookstore.Page,
com.ibm.bookstore.PageId, com.ibm.bookstore.Book, com.ibm.bookstore.BookId].
1235  domain  TRACE  [main] openjpa.MetaData - Found 5 classes with metadata
in 0 milliseconds.
1313  domain  TRACE  [main] openjpa.MetaData - Parsing class
"com.ibm.bookstore.Library".
1313  domain  TRACE  [main] openjpa.MetaData - Parsing package
"com.ibm.bookstore.Library".
1391  domain  TRACE  [main] openjpa.MetaData - Generating default metadata
for type "com.ibm.bookstore.Library".
1391  domain  TRACE  [main] openjpa.MetaData - Using reflection for metadata
generation.
1422  domain  TRACE  [main] openjpa.MetaData - Set persistence-capable
superclass of "com.ibm.bookstore.Library" to "null".
1422  domain  TRACE  [main] openjpa.MetaData - Resolving metadata for
"com.ibm.bookstore.Library@1293176084".
1422  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Library@1293176084.books".
1422  domain  TRACE  [main] openjpa.MetaData - Loading metadata for "class
com.ibm.bookstore.Book" under mode "[META]".
1422  domain  TRACE  [main] openjpa.MetaData - Parsing class
"com.ibm.bookstore.Book".
1438  domain  TRACE  [main] openjpa.MetaData - Generating default metadata
for type "com.ibm.bookstore.Book".
1438  domain  TRACE  [main] openjpa.MetaData - Using reflection for metadata
generation.
1438  domain  TRACE  [main] openjpa.MetaData - Set persistence-capable
superclass of "com.ibm.bookstore.Book" to "null".
1453  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Library@1293176084.name".
1453  domain  TRACE  [main] openjpa.MetaData - Resolving metadata for
"com.ibm.bookstore.Book@2076343234".
1453  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@2076343234.library".
1453  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@2076343234.name".
1453  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@2076343234.pages".
1453  domain  TRACE  [main] openjpa.MetaData - Loading metadata for "class
com.ibm.bookstore.Page" under mode "[META]".
1453  domain  TRACE  [main] openjpa.MetaData - Parsing class
"com.ibm.bookstore.Page".
1485  domain  TRACE  [main] openjpa.MetaData - Generating default metadata
for type "com.ibm.bookstore.Page".
1485  domain  TRACE  [main] openjpa.MetaData - Using reflection for metadata
generation.
1485  domain  TRACE  [main] openjpa.MetaData - Set persistence-capable
superclass of "com.ibm.bookstore.Page" to "null".
1485  domain  TRACE  [main] openjpa.MetaData - Resolving metadata for
"com.ibm.bookstore.Page@1007959060".
1485  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Page@1007959060.book".
1485  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Page@1007959060.number".
1485  domain  TRACE  [main] openjpa.MetaData - Preparing mapping for
"com.ibm.bookstore.Library".
1500  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Library@1293176084.name".
1500  domain  TRACE  [main] openjpa.MetaData - 	"name" has mapping strategy
"org.apache.openjpa.jdbc.meta.strats.StringFieldStrategy".
1500  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Library<discriminator>" has mapping strategy "none".
1516  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Library<version>" has mapping strategy "none".
1516  domain  TRACE  [main] openjpa.MetaData - Preparing mapping for
"com.ibm.bookstore.Book".
1516  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@2076343234.library".
1531  domain  TRACE  [main] openjpa.MetaData - 	"library" has mapping
strategy "org.apache.openjpa.jdbc.meta.strats.RelationFieldStrategy".
1531  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@2076343234.name".
1531  domain  TRACE  [main] openjpa.MetaData - 	"name" has mapping strategy
"org.apache.openjpa.jdbc.meta.strats.StringFieldStrategy".
1531  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Book<discriminator>" has mapping strategy "none".
1531  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Book<version>" has mapping strategy "none".
1531  domain  TRACE  [main] openjpa.MetaData - Preparing mapping for
"com.ibm.bookstore.Page".
1531  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Page@1007959060.book".
1531  domain  TRACE  [main] openjpa.MetaData - 	"book" has mapping strategy
"org.apache.openjpa.jdbc.meta.strats.RelationFieldStrategy".
1531  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Page@1007959060.number".
1531  domain  TRACE  [main] openjpa.MetaData - 	"number" has mapping
strategy "org.apache.openjpa.jdbc.meta.strats.PrimitiveFieldStrategy".
1531  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Page<discriminator>" has mapping strategy "none".
1531  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Page<version>" has mapping strategy "none".
1531  domain  TRACE  [main] openjpa.MetaData - Resolving mapping for
"com.ibm.bookstore.Library@1293176084".
1531  domain  TRACE  [main] openjpa.MetaData - "com.ibm.bookstore.Library"
has mapping strategy "full".
1531  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Library@1293176084.books".
1547  domain  TRACE  [main] openjpa.MetaData - 	"books" has mapping strategy
"org.apache.openjpa.jdbc.meta.strats.RelationCollectionInverseKeyFieldStrategy".
1547  domain  TRACE  [main] openjpa.MetaData - Resolving mapping for
"com.ibm.bookstore.Book@2076343234".
1547  domain  TRACE  [main] openjpa.MetaData - "com.ibm.bookstore.Book" has
mapping strategy "full".
1547  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@2076343234.pages".
1547  domain  TRACE  [main] openjpa.MetaData - 	"pages" has mapping strategy
"org.apache.openjpa.jdbc.meta.strats.RelationCollectionInverseKeyFieldStrategy".
1547  domain  TRACE  [main] openjpa.MetaData - Resolving mapping for
"com.ibm.bookstore.Page@1007959060".
1547  domain  TRACE  [main] openjpa.MetaData - "com.ibm.bookstore.Page" has
mapping strategy "full".
1547  domain  TRACE  [main] openjpa.Enhance - Enhancing type "class
com.ibm.bookstore.Library".
1625  domain  TRACE  [main] openjpa.Runtime - No cache marshaller found for
id org.apache.openjpa.conf.MetaDataCacheMaintenance.
1625  domain  TRACE  [main] openjpa.MetaData - Using metadata factory
"org.apache.openjpa.persistence.jdbc.PersistenceMappingFactory@3ebe3ebe".
1625  domain  TRACE  [main] openjpa.MetaData - Loading metadata for "class
com.ibm.bookstore.Page" under mode "[META]".
1625  domain  TRACE  [main] openjpa.MetaData - Scanning resource
"META-INF/orm.xml" for persistent types.
1625  domain  TRACE  [main] openjpa.MetaData - parsePersistentTypeNames()
found [com.ibm.bookstore.Library, com.ibm.bookstore.Page,
com.ibm.bookstore.PageId, com.ibm.bookstore.Book, com.ibm.bookstore.BookId].
1625  domain  TRACE  [main] openjpa.MetaData - Found 5 classes with metadata
in 0 milliseconds.
1625  domain  TRACE  [main] openjpa.MetaData - Parsing class
"com.ibm.bookstore.Page".
1625  domain  TRACE  [main] openjpa.MetaData - Parsing package
"com.ibm.bookstore.Page".
1625  domain  TRACE  [main] openjpa.MetaData - Generating default metadata
for type "com.ibm.bookstore.Page".
1625  domain  TRACE  [main] openjpa.MetaData - Using reflection for metadata
generation.
1641  domain  TRACE  [main] openjpa.MetaData - Set persistence-capable
superclass of "com.ibm.bookstore.Page" to "null".
1641  domain  TRACE  [main] openjpa.MetaData - Loading metadata for "class
com.ibm.bookstore.Book" under mode "[META]".
1641  domain  TRACE  [main] openjpa.MetaData - Parsing class
"com.ibm.bookstore.Book".
1641  domain  TRACE  [main] openjpa.MetaData - Generating default metadata
for type "com.ibm.bookstore.Book".
1641  domain  TRACE  [main] openjpa.MetaData - Using reflection for metadata
generation.
1641  domain  TRACE  [main] openjpa.MetaData - Set persistence-capable
superclass of "com.ibm.bookstore.Book" to "null".
1641  domain  TRACE  [main] openjpa.MetaData - Loading metadata for "class
com.ibm.bookstore.Library" under mode "[META]".
1641  domain  TRACE  [main] openjpa.MetaData - Parsing class
"com.ibm.bookstore.Library".
1641  domain  TRACE  [main] openjpa.MetaData - Generating default metadata
for type "com.ibm.bookstore.Library".
1641  domain  TRACE  [main] openjpa.MetaData - Set persistence-capable
superclass of "com.ibm.bookstore.Library" to "null".
1641  domain  TRACE  [main] openjpa.MetaData - Resolving metadata for
"com.ibm.bookstore.Library@1836739962".
1641  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Library@1836739962.books".
1641  domain  TRACE  [main] openjpa.MetaData - Set persistence-capable
superclass of "com.ibm.bookstore.Book" to "null".
1641  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Library@1836739962.name".
1641  domain  TRACE  [main] openjpa.MetaData - Resolving metadata for
"com.ibm.bookstore.Book@614212764".
1641  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@614212764.library".
1641  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@614212764.name".
1641  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@614212764.pages".
1641  domain  TRACE  [main] openjpa.MetaData - Set persistence-capable
superclass of "com.ibm.bookstore.Page" to "null".
1641  domain  TRACE  [main] openjpa.MetaData - Resolving metadata for
"com.ibm.bookstore.Page@1667392354".
1641  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Page@1667392354.book".
1641  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Page@1667392354.number".
1641  domain  TRACE  [main] openjpa.MetaData - Preparing mapping for
"com.ibm.bookstore.Library".
1641  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Library@1836739962.name".
1641  domain  TRACE  [main] openjpa.MetaData - 	"name" has mapping strategy
"org.apache.openjpa.jdbc.meta.strats.StringFieldStrategy".
1641  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Library<discriminator>" has mapping strategy "none".
1641  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Library<version>" has mapping strategy "none".
1641  domain  TRACE  [main] openjpa.MetaData - Preparing mapping for
"com.ibm.bookstore.Book".
1641  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@614212764.library".
1641  domain  TRACE  [main] openjpa.MetaData - 	"library" has mapping
strategy "org.apache.openjpa.jdbc.meta.strats.RelationFieldStrategy".
1641  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@614212764.name".
1656  domain  TRACE  [main] openjpa.MetaData - 	"name" has mapping strategy
"org.apache.openjpa.jdbc.meta.strats.StringFieldStrategy".
1656  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Book<discriminator>" has mapping strategy "none".
1656  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Book<version>" has mapping strategy "none".
1656  domain  TRACE  [main] openjpa.MetaData - Preparing mapping for
"com.ibm.bookstore.Page".
1656  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Page@1667392354.book".
1656  domain  TRACE  [main] openjpa.MetaData - 	"book" has mapping strategy
"org.apache.openjpa.jdbc.meta.strats.RelationFieldStrategy".
1656  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Page@1667392354.number".
1656  domain  TRACE  [main] openjpa.MetaData - 	"number" has mapping
strategy "org.apache.openjpa.jdbc.meta.strats.PrimitiveFieldStrategy".
1656  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Page<discriminator>" has mapping strategy "none".
1656  domain  TRACE  [main] openjpa.MetaData -
"com.ibm.bookstore.Page<version>" has mapping strategy "none".
1656  domain  TRACE  [main] openjpa.MetaData - Resolving mapping for
"com.ibm.bookstore.Library@1836739962".
1656  domain  TRACE  [main] openjpa.MetaData - "com.ibm.bookstore.Library"
has mapping strategy "full".
1656  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Library@1836739962.books".
1656  domain  TRACE  [main] openjpa.MetaData - 	"books" has mapping strategy
"org.apache.openjpa.jdbc.meta.strats.RelationCollectionInverseKeyFieldStrategy".
1656  domain  TRACE  [main] openjpa.MetaData - Resolving mapping for
"com.ibm.bookstore.Book@614212764".
1656  domain  TRACE  [main] openjpa.MetaData - "com.ibm.bookstore.Book" has
mapping strategy "full".
1656  domain  TRACE  [main] openjpa.MetaData - 	Resolving field
"com.ibm.bookstore.Book@614212764.pages".
1656  domain  TRACE  [main] openjpa.MetaData - 	"pages" has mapping strategy
"org.apache.openjpa.jdbc.meta.strats.RelationCollectionInverseKeyFieldStrategy".
1656  domain  TRACE  [main] openjpa.MetaData - Resolving mapping for
"com.ibm.bookstore.Page@1667392354".
1656  domain  TRACE  [main] openjpa.MetaData - "com.ibm.bookstore.Page" has
mapping strategy "full".
1656  domain  TRACE  [main] openjpa.Enhance - Enhancing type "class
com.ibm.bookstore.Page".
1703  domain  TRACE  [main] openjpa.Runtime - No cache marshaller found for
id org.apache.openjpa.conf.MetaDataCacheMaintenance.
1703  domain  TRACE  [main] openjpa.MetaData - Using metadata factory
"org.apache.openjpa.persistence.jdbc.PersistenceMappingFactory@5ffa5ffa".
1703  domain  TRACE  [main] openjpa.MetaData - Loading metadata for "class
com.ibm.bookstore.PageId" under mode "[META]".
1703  domain  TRACE  [main] openjpa.MetaData - Scanning resource
"META-INF/orm.xml" for persistent types.
1703  domain  TRACE  [main] openjpa.MetaData - parsePersistentTypeNames()
found [com.ibm.bookstore.Library, com.ibm.bookstore.Page,
com.ibm.bookstore.PageId, com.ibm.bookstore.Book, com.ibm.bookstore.BookId].
1703  domain  TRACE  [main] openjpa.MetaData - Found 5 classes with metadata
in 0 milliseconds.
1703  domain  TRACE  [main] openjpa.MetaData - Parsing class
"com.ibm.bookstore.PageId".
1703  domain  TRACE  [main] openjpa.MetaData - Parsing package
"com.ibm.bookstore.PageId".
Exception in thread "main" <openjpa-1.1.0-r422266:657916 nonfatal general
error> org.apache.openjpa.persistence.PersistenceException: null
	at
org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:196)
	at
org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:142)
	at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:192)
	at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:145)
	at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:56)
	at com.ibm.client.test.CompositeKeyTest.main(CompositeKeyTest.java:20)
Caused by: java.lang.NullPointerException
	at
org.apache.openjpa.enhance.ManagedClassSubclasser.setDetachedState(ManagedClassSubclasser.java:299)
	at
org.apache.openjpa.enhance.ManagedClassSubclasser.configureMetaData(ManagedClassSubclasser.java:217)
	at
org.apache.openjpa.enhance.ManagedClassSubclasser.prepareUnenhancedClasses(ManagedClassSubclasser.java:139)
	at
org.apache.openjpa.kernel.AbstractBrokerFactory.loadPersistentTypes(AbstractBrokerFactory.java:310)
	at
org.apache.openjpa.kernel.AbstractBrokerFactory.initializeBroker(AbstractBrokerFactory.java:228)
	at
org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:190)
	... 5 more


farble1670 wrote:
> 
> after doing some decompilation, the problem line is ...
> 
>         PageId pageid = (PageId)((ObjectId)obj).getId();
> 
> in the enhanced Page class. so, looking at PageId, it's not an instance of
> ObjectId. so, i am not sure what is supposed to be happening here. i
> assume that PageId is supposed to be enhanced in some way. decompiling it
> shows that is not the case.
> 
> ???
> 
> thanks.
> 
> jeff <jeffrey.blattman@yahoo.com> wrote: okay, by chance i looked at the
> open jpa pom and saw that it calls out surefire 2.2 w/ some particular
> options. sure enough, that fixed the classpath problem.
> 
> however, i still get the exception w/ regard to ObjectId after making the
> changes you suggested ...
> 
> 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:355)
>         at
> org.apache.openjpa.kernel.BrokerImpl.persist(BrokerImpl.java:2382)
> 
> jeff  wrote: 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.java: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.
> 
> 
> ________________________________
> 
> The fish are biting.
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