import org.apache.maven.wagon.providers.http.LightweightHttpWagon; //导入依赖的package包/类
/**
 * {@inheritDoc}
 * 
 * @see org.sonatype.aether.connector.wagon.WagonProvider#lookup(java.lang.String)
 */
@Override
public Wagon lookup(final String roleHint) throws Exception
{
   if (roleHint.equals(HTTP))
   {
      return setAuthenticator(new LightweightHttpWagon());
   }
   else if (roleHint.equals(HTTPS))
   {
      return setAuthenticator(new LightweightHttpsWagon());
   }
   else if (roleHint.equals(FILE))
   {
      return new FileWagon();
   }

   throw new RuntimeException("Role hint not supported: " + roleHint);
}
 

import org.apache.maven.wagon.providers.http.LightweightHttpWagon; //导入依赖的package包/类
@Override
public Wagon lookup(String roleHint) throws Exception {
    if ("http".equals(roleHint)) {
        if (useLightweightHttpWagon) {
            LightweightHttpWagon lightweightHttpWagon = new LightweightHttpWagon();
            FieldUtils.writeField(lightweightHttpWagon, "authenticator", new LightweightHttpWagonAuthenticator(), true);
            return lightweightHttpWagon;
        } else {
            return new HttpWagon();
        }
    } else if ("https".equals(roleHint)) {
        if (useLightweightHttpWagon) {
            LightweightHttpsWagon lightweightHttpsWagon = new LightweightHttpsWagon();
            FieldUtils.writeField(lightweightHttpsWagon, "authenticator", new LightweightHttpWagonAuthenticator(), true);
            return lightweightHttpsWagon;
        } else {
            return new HttpWagon();
        }
    } else if ("file".equals(roleHint)) {
        return new FileWagon();
    }
    return null;
}
 

import org.apache.maven.wagon.providers.http.LightweightHttpWagon; //导入依赖的package包/类
@Override
public Wagon lookup(String roleHint) throws Exception {
  if ("http".equals(roleHint)) {
    return new LightweightHttpWagon();
  }

  if ("https".equals(roleHint)) {
    return new HttpWagon();
  }

  return null;
}
 

import org.apache.maven.wagon.providers.http.LightweightHttpWagon; //导入依赖的package包/类
public Wagon lookup(String roleHint) {
    if ("http".equals(roleHint)) {
        return new LightweightHttpWagon() {
            @Override
            protected void openConnectionInternal() throws ConnectionException, AuthenticationException {
            }
        };
    }
    return null;
}
 

import org.apache.maven.wagon.providers.http.LightweightHttpWagon; //导入依赖的package包/类
private LightweightHttpWagon setAuthenticator(final LightweightHttpWagon wagon)
{
   final Field authenticator;
   try
   {
      authenticator = AccessController.doPrivileged(new PrivilegedExceptionAction<Field>()
      {
         @Override
         public Field run() throws Exception
         {
            final Field field = LightweightHttpWagon.class.getDeclaredField("authenticator");
            field.setAccessible(true);
            return field;
         }
      });
   }
   catch (final PrivilegedActionException pae)
   {
      throw new RuntimeException("Could not manually set authenticator to accessible on "
               + LightweightHttpWagon.class.getName(), pae);
   }
   try
   {
      authenticator.set(wagon, new LightweightHttpWagonAuthenticator());
   }
   catch (final Exception e)
   {
      throw new RuntimeException("Could not manually set authenticator on " + LightweightHttpWagon.class.getName(),
               e);
   }

   // SHRINKRES-69
   // Needed to ensure that we do not cache BASIC Auth values
   wagon.setPreemptiveAuthentication(true);

   return wagon;
}