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From "Michael Dick (JIRA)" <j...@apache.org>
Subject [jira] Created: (OPENJPA-132) java.lang.NoSuchMethodError for entity with ID of type java.sql.Date
Date Wed, 07 Feb 2007 22:42:05 GMT
java.lang.NoSuchMethodError for entity with ID of type java.sql.Date
--------------------------------------------------------------------

                 Key: OPENJPA-132
                 URL: https://issues.apache.org/jira/browse/OPENJPA-132
             Project: OpenJPA
          Issue Type: Bug
          Components: kernel
            Reporter: Michael Dick


Opening JIRA report to track the following problem (posted to development forum http://www.nabble.com/Exception-when-using-java.sql.Date-as-an-id-tf3189597.html)


I'm getting the following exception when I try to fetch an entity with a java.sql.Date as
the id :

java.lang.NoSuchMethodError: org.apache.openjpa.util.DateId.getId()Ljava/sql/Date;
    at mikedd.entities.SqlDatePK.pcCopyKeyFieldsFromObjectId (SqlDatePK.java)
    at mikedd.entities.SqlDatePK.pcNewInstance(SqlDatePK.java)
    at org.apache.openjpa.enhance.PCRegistry.newInstance(PCRegistry.java:118)
    at org.apache.openjpa.kernel.StateManagerImpl.initialize (StateManagerImpl.java:247)
    at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initializeState(JDBCStoreManager.java:327)
    at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initialize(JDBCStoreManager.java:252)
    at org.apache.openjpa.kernel.DelegatingStoreManager.initialize(DelegatingStoreManager.java:108)
    at org.apache.openjpa.kernel.ROPStoreManager.initialize(ROPStoreManager.java:54)
    at org.apache.openjpa.kernel.BrokerImpl.initialize (BrokerImpl.java:868)
    at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:826)
    at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:743)
    at org.apache.openjpa.kernel.DelegatingBroker.find (DelegatingBroker.java:169)
    at org.apache.openjpa.persistence.EntityManagerImpl.find(EntityManagerImpl.java:346)
    at mikedd.tests.TestSqlDateId.testFindAfterClear(TestSqlDateId.java:25)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke (Method.java:585)
    at junit.framework.TestCase.runTest(TestCase.java:154)
    . . .

It's coming from the generated bytecode which expects there to be a getId method that returns
the same type of the Id, however java.sql.Date is using the same ID class as java.util.Date.
Do we need a separate class for java.sql.Date? 


Responses from Patrick and Craig follow. The consensus so far is to provide ID separate classes
for java.sql.Date and java.util.Date. 

It looks like we either need a separate type for java.sql.Date (and
presumably java.sql.Timestamp), or we need to change the logic to accept
a getId() method that returns a type that is assignable from the id
field's type.

-Patrick

It's probably cleaner if we have separate classes for the different
types. That is, have the getId method in the new
org.apache.openjpa.util.SQLDateId return the proper type
(java.sql.Date). After all, java.sql.{Date, Time, Timestamp} are not
really the same as java.util.Date.

-Craig

FTR, I think that I prefer separate classes as well; it's clearer, and
avoids any ambiguity with other subclasses in the future.

-Patrick

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