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package org.apache.cayenne.configuration.osgi;
import org.apache.cayenne.ConfigurationException;
import org.apache.cayenne.access.DataDomain;
import org.apache.cayenne.configuration.server.DataDomainProvider;
import org.apache.cayenne.di.ClassLoaderManager;
import org.apache.cayenne.di.Inject;
import org.apache.cayenne.map.EntityResolver;
import org.apache.cayenne.map.ObjEntity;
/**
* @since 4.0
*/
// TODO: this is really a hack until we can have fully injectable class loading
// at the EntityResolver level per CAY-1887
public class OsgiDataDomainProvider extends DataDomainProvider {
private ClassLoaderManager classLoaderManager;
public OsgiDataDomainProvider(@Inject ClassLoaderManager classLoaderManager) {
this.classLoaderManager = classLoaderManager;
}
@Override
public DataDomain get() throws ConfigurationException {
// here goes the class loading hack, temporarily setting application
// bundle ClassLoader to be a thread ClassLoader for runtime to start.
Thread thread = Thread.currentThread();
ClassLoader activeCl = thread.getContextClassLoader();
try {
// using fake package name... as long as it is not
// org.apache.cayenne, this do the right trick
thread.setContextClassLoader(classLoaderManager.getClassLoader("com/"));
DataDomain domain = super.get();
EntityResolver entityResolver = domain.getEntityResolver();
for (ObjEntity e : entityResolver.getObjEntities()) {
// it is not enough to just call 'getObjectClass()' on
// ClassDescriptor - there's an optimization that prevents full
// descriptor resolving... so calling some other method...
entityResolver.getClassDescriptor(e.getName()).getProperty("__dummy__");
entityResolver.getCallbackRegistry();
}
// this triggers callbacks initialization using thread class loader
entityResolver.getCallbackRegistry();
return domain;
} finally {
thread.setContextClassLoader(activeCl);
}
}
}