package com.atlassian.refapp.sal;
   
   import com.atlassian.plugin.spring.scanner.annotation.export.ExportAsService;
   import com.atlassian.sal.spi.HostContextAccessor;
   import org.osgi.framework.BundleContext;
   import org.osgi.framework.InvalidSyntaxException;
   import org.osgi.framework.ServiceReference;
   
   import javax.inject.Inject;
  import javax.inject.Named;
  import java.util.HashMap;
  import java.util.Map;
  
  @ExportAsService
  @Named("hostContextAccessor")
  public class RefimplHostContextAccessor implements HostContextAccessor {
      private final BundleContext bundleContext;
  
      @Inject
      public RefimplHostContextAccessor(final BundleContext bundleContext) {
          this.bundleContext = bundleContext;
      }
  
      public Object doInTransaction(HostTransactionCallback callback) {
          return callback.doInTransaction();
      }
  
      public <T> Map<String, T> getComponentsOfType(Class<T> iface) {
          ServiceReference[] refs = new ServiceReference[0];
          try {
              refs = bundleContext.getServiceReferences(iface.getName(), null);
          } catch (InvalidSyntaxException e) {
              // will not happen - we pass null as a filter. Woo for checked exceptions!
              throw new RuntimeException("Invalid filter", e);
          }
          Map<String, T> objs = new HashMap<String, T>();
          if (refs != null) {
              for (ServiceReference ref : refs) {
                  objs.put("", (T) bundleContext.getService(ref));
              }
          }
          return objs;
      }
  
  }