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package com.sun.enterprise.module.bootstrap;
import java.util.HashSet;
import java.util.Set;
import org.glassfish.hk2.api.Descriptor;
import org.glassfish.hk2.api.IndexedFilter;
import org.glassfish.hk2.api.PerLookup;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.bootstrap.PopulatorPostProcessor;
import org.glassfish.hk2.utilities.DescriptorImpl;
/**
* This class will weed out and duplicate implementations of anything populated into the
* locator. This service must be put into the ServiceLocator prior to populating from the
* inhabitant files, and hence is not annotated with @Service
*
* @author jwells
*
*/
@PerLookup
public class ContextDuplicatePostProcessor implements PopulatorPostProcessor {
private final HashSet<DescriptorImpl> dupSet = new HashSet<DescriptorImpl>();
/* (non-Javadoc)
* @see org.glassfish.hk2.bootstrap.PopulatorPostProcessor#process(org.glassfish.hk2.utilities.DescriptorImpl)
*/
@Override
public DescriptorImpl process(ServiceLocator serviceLocator, DescriptorImpl descriptorImpl) {
if (dupSet.contains(descriptorImpl)) {
return null;
}
dupSet.add(descriptorImpl);
Set<String> contracts = descriptorImpl.getAdvertisedContracts();
String contract = null;
for (String candidate : contracts) {
if (candidate.equals(descriptorImpl.getImplementation())) {
// Prefer this one over anything else
contract = candidate;
break;
}
contract = candidate;
}
final String fContract = contract;
final String fName = descriptorImpl.getName();
final DescriptorImpl fDescriptorImpl = descriptorImpl;
if (serviceLocator.getBestDescriptor(new IndexedFilter() {
@Override
public boolean matches(Descriptor d) {
return fDescriptorImpl.equals(d);
}
@Override
public String getAdvertisedContract() {
return fContract;
}
@Override
public String getName() {
return fName;
}
}) != null) {
// Already in the locator, do not add again
return null;
}
return descriptorImpl;
}
}