GeoServer 2.2.5 + JBoss 7.1.1 and Oracle

As I posted some time ago, I'm using GeoServer version 2.2.5 on a JBoss 7.1.1 installation; now I'm working with an Oracle Database so I've added the Oracle extension. And added it in the "$WAR/WEB-INF/lib/" the jar that is downloaded as a separate package (mind to download the same version for the GeoServer you are using).

I had this problem accessing oracle tables:

09:23:34,911 ERROR [org.geoserver.ows] (http--10.20.1.50-8280-17) : java.lang.NoClassDefFoundError: oracle/jdbc/OracleConnection
at org.geotools.data.oracle.OracleDialect.unwrapConnection(OracleDialect.java:544) [gt-jdbc-oracle-8.7.jar:]
at org.geotools.data.oracle.OracleDialect.setGeometryValue(OracleDialect.java:517) [gt-jdbc-oracle-8.7.jar:]
at org.geotools.jdbc.JDBCDataStore.setPreparedFilterValues(JDBCDataStore.java:3168) [gt-jdbc-8.7.jar:]
at org.geotools.jdbc.JDBCDataStore.setPreparedFilterValues(JDBCDataStore.java:3147) [gt-jdbc-8.7.jar:]
at org.geotools.jdbc.JDBCDataStore.selectAggregateSQLPS(JDBCDataStore.java:3372) [gt-jdbc-8.7.jar:]
at org.geotools.jdbc.JDBCDataStore.getAggregateValue(JDBCDataStore.java:1292) [gt-jdbc-8.7.jar:]
at org.geotools.jdbc.JDBCDataStore.getCount(JDBCDataStore.java:1250) [gt-jdbc-8.7.jar:]
at org.geotools.jdbc.JDBCFeatureSource.getCountInternal(JDBCFeatureSource.java:432) [gt-jdbc-8.7.jar:]
at org.geotools.data.store.ContentFeatureSource.getCount(ContentFeatureSource.java:451) [gt-data-8.7.jar:]
at org.geotools.jdbc.JDBCFeatureStore.getCountInternal(JDBCFeatureStore.java:183) [gt-jdbc-8.7.jar:]
at org.geotools.data.store.ContentFeatureSource.getCount(ContentFeatureSource.java:451) [gt-data-8.7.jar:]
at org.geotools.data.store.ContentFeatureCollection.size(ContentFeatureCollection.java:356) [gt-data-8.7.jar:]
at org.geoserver.wms.GetFeatureInfo.execute(GetFeatureInfo.java:297) [wms-2.2.5.jar:2.2.5]
at org.geoserver.wms.GetFeatureInfo.execute(GetFeatureInfo.java:168) [wms-2.2.5.jar:2.2.5]
at org.geoserver.wms.GetFeatureInfo.run(GetFeatureInfo.java:117) [wms-2.2.5.jar:2.2.5]
at org.geoserver.wms.DefaultWebMapService.getFeatureInfo(DefaultWebMapService.java:374) [wms-2.2.5.jar:2.2.5]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.6.0_25]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [rt.jar:1.6.0_25]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [rt.jar:1.6.0_25]
at java.lang.reflect.Method.invoke(Method.java:597) [rt.jar:1.6.0_25]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318) [spring-aop-3.1.1.RELEASE.jar:3.1.1.RELEASE]

The problem is due to a classloading mechanism of the AS.