Iam Trying to acquire a Unit of Work but ... Exceptions !!! :(

This is my code :
package RENSPackage;
import java.io.File;
import oracle.toplink.threetier.Server;
import oracle.toplink.tools.sessionconfiguration.XMLLoader;
import oracle.toplink.tools.sessionmanagement.SessionManager;
public class Loader
protected Server server;
protected UnitOfWork uow;
protected ClientSession client;
public Loader()
XMLLoader xmlLoader = new XMLLoader("META-INF/sessions.xml");
ClassLoader classLoader = getClass().getClassLoader();
SessionManager manager = SessionManager.getManager();
server = (Server)manager.getSession(xmlLoader, "Rens", classLoader,true,true);
client = server.acquireClientSession();
uow = client.acquireUnitOfWork();
public static void main(String args[])
new Loader();
errors:
Exception in thread main
Local Exception Stack:
Exception Description: Several [1] SessionLoaderExceptions were thrown:
Exception [TOPLINK-9005] (OracleAS TopLink - 10g (9.0.4.5) (Build 040930)): oracle.toplink.exceptions.SessionLoaderException
Exception Description: An exception was thrown while loading the <project-xml> file [C:/Program Files/JDeveloper 10.1.2/jdev/mywork/alghurair/toplink/classes/META-INF/toplink/toplink-deployment-descriptor.xml].
Internal Exception: Exception [TOPLINK-106] (OracleAS TopLink - 10g (9.0.4.5) (Build 040930)): oracle.toplink.exceptions.DescriptorException
Exception Description: The method [setPlatformClassName] on the object is throwing an exception.
Argument: [oracle.toplink.oraclespecific.Oracle9Platform]
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NoClassDefFoundError: oracle.sql.TIMESTAMP
Mapping: oracle.toplink.mappings.DirectToFieldMapping[platform-->platform]
Descriptor: XMLDescriptor(oracle.toplink.sessions.DatabaseLogin --> [DatabaseTable(database-login)])
     at oracle.toplink.exceptions.SessionLoaderException.finalException(SessionLoaderException.java:89)
     at oracle.toplink.tools.sessionconfiguration.XMLLoader.load(XMLLoader.java:156)
     at oracle.toplink.tools.sessionmanagement.SessionManager.getSession(SessionManager.java:219)
     at RENSPackage.Loader.<init>(Loader.java:19)
     at RENSPackage.Loader.main(Loader.java:24)
SessionLoaderExceptions:
Local Exception Stack:
Exception [TOPLINK-9005] (OracleAS TopLink - 10g (9.0.4.5) (Build 040930)): oracle.toplink.exceptions.SessionLoaderException
Exception Description: An exception was thrown while loading the <project-xml> file [C:/Program Files/JDeveloper 10.1.2/jdev/mywork/alghurair/toplink/classes/META-INF/toplink/toplink-deployment-descriptor.xml].
Internal Exception: Exception [TOPLINK-106] (OracleAS TopLink - 10g (9.0.4.5) (Build 040930)): oracle.toplink.exceptions.DescriptorException
Exception Description: The method [setPlatformClassName] on the object is throwing an exception.
Argument: [oracle.toplink.oraclespecific.Oracle9Platform]
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NoClassDefFoundError: oracle.sql.TIMESTAMP
Mapping: oracle.toplink.mappings.DirectToFieldMapping[platform-->platform]
Descriptor: XMLDescriptor(oracle.toplink.sessions.DatabaseLogin --> [DatabaseTable(database-login)])
     at oracle.toplink.exceptions.SessionLoaderException.failedToLoadProjectXml(SessionLoaderException.java:74)
     at oracle.toplink.tools.sessionconfiguration.XMLLoader.process_project_xml_Tag(XMLLoader.java:948)
     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:324)
     at oracle.toplink.tools.sessionconfiguration.XMLLoader.process_session_Tag(XMLLoader.java:415)
     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:324)
     at oracle.toplink.tools.sessionconfiguration.XMLLoader.processRootTag(XMLLoader.java:223)
     at oracle.toplink.tools.sessionconfiguration.XMLLoader.load(XMLLoader.java:153)
     at oracle.toplink.tools.sessionmanagement.SessionManager.getSession(SessionManager.java:219)
     at RENSPackage.Loader.<init>(Loader.java:19)
     at RENSPackage.Loader.main(Loader.java:24)
Caused by: Exception [TOPLINK-106] (OracleAS TopLink - 10g (9.0.4.5) (Build 040930)): oracle.toplink.exceptions.DescriptorException
Exception Description: The method [setPlatformClassName] on the object is throwing an exception.
Argument: [oracle.toplink.oraclespecific.Oracle9Platform]
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.lang.NoClassDefFoundError: oracle.sql.TIMESTAMP
Mapping: oracle.toplink.mappings.DirectToFieldMapping[platform-->platform]
Descriptor: XMLDescriptor(oracle.toplink.sessions.DatabaseLogin --> [DatabaseTable(database-login)])
     at oracle.toplink.exceptions.DescriptorException.targetInvocationWhileSettingValueThruMethodAccessor(DescriptorException.java:1433)
     at oracle.toplink.internal.descriptors.MethodAttributeAccessor.setAttributeValueInObject(MethodAttributeAccessor.java:152)
     at oracle.toplink.mappings.DatabaseMapping.setAttributeValueInObject(DatabaseMapping.java:950)
     at oracle.toplink.mappings.DatabaseMapping.readFromRowIntoObject(DatabaseMapping.java:862)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildAttributesIntoObject(ObjectBuilder.java:164)
     at oracle.toplink.sdk.SDKAggregateObjectMapping.valueFromRow(SDKAggregateObjectMapping.java:124)
     at oracle.toplink.mappings.DatabaseMapping.readFromRowIntoObject(DatabaseMapping.java:860)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildAttributesIntoObject(ObjectBuilder.java:164)
     at oracle.toplink.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:322)
     at oracle.toplink.queryframework.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:242)
     at oracle.toplink.queryframework.ReadObjectQuery.execute(ReadObjectQuery.java:368)
     at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:493)
     at oracle.toplink.queryframework.ReadQuery.execute(ReadQuery.java:125)
     at oracle.toplink.publicinterface.Session.internalExecuteQuery(Session.java:1958)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:1086)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:1038)
     at oracle.toplink.tools.workbench.XMLProjectReader.readWithClassLoader(XMLProjectReader.java:61)
     at oracle.toplink.tools.workbench.XMLProjectReader.read(XMLProjectReader.java:39)
     at oracle.toplink.tools.sessionconfiguration.XMLLoader.process_project_xml_Tag(XMLLoader.java:937)
     ... 14 more
Caused by: java.lang.reflect.InvocationTargetException
     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:324)
     at oracle.toplink.internal.descriptors.MethodAttributeAccessor.setAttributeValueInObject(MethodAttributeAccessor.java:125)
     ... 31 more
Caused by: java.lang.NoClassDefFoundError: oracle.sql.TIMESTAMP
     at oracle.toplink.oraclespecific.Oracle9Platform.class$(Oracle9Platform.java:36)
     at oracle.toplink.oraclespecific.Oracle9Platform.<clinit>(Oracle9Platform.java:40)
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:141)
     at oracle.toplink.sessions.DatabaseLogin.setPlatformClassName(DatabaseLogin.java:1623)
     ... 36 more
Process exited with exit code 1.

The Oracle 9 Platform requires the Oracle JDBC driver to be on the classpath. If you are trying to use the Oracle JDBC driver, then likely your driver is not on the classpath.
If you are using another driver to access the oracle database then you will need to use OraclePlatform. OraclePlatform does not make any reference to Oracle Driver specific classes.
Peter

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Iam Trying to acquire a Unit of Work but ... Exceptions !!! :(

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