How to use org.jclouds.ec2.compute.functions

public static Map<RegionAndName, ? extends Image> imagesToMap(Iterable<? extends Image> input) {
 return new ImagesToRegionAndIdMap().apply(input);
}

private EC2SecurityGroupToSecurityGroup createGroupParser(final ImmutableSet<Location> locations) {
 Supplier<Set<? extends Location>> locationSupplier = new Supplier<Set<? extends Location>>() {
   @Override
   public Set<? extends Location> get() {
    return locations;
   }
 };
 EC2SecurityGroupToSecurityGroup parser = new EC2SecurityGroupToSecurityGroup(locationSupplier);
 return parser;
}

private Location getLocationForAvailabilityZoneOrRegion(final RunningInstance instance) {
 Location location = findLocationWithId(instance.getAvailabilityZone());
 if (location == null)
   location = findLocationWithId(instance.getRegion());
 return location;
}

@Override
public KeyPair apply(RegionAndName from) {
 return createNewKeyPairInRegion(from.getRegion(), from.getName());
}

private void checkGroupName(RunningInstance instance) {
 assertEquals("groupname", createNodeParser(ImmutableSet.<Hardware> of(), ImmutableSet
    .<Location> of(), ImmutableSet.<Image> of(), ImmutableMap.<String, Credentials> of())
    .apply(instance).getGroup());
}

protected RunningInstanceToNodeMetadata createNodeParser(final ImmutableSet<Hardware> hardware,
    final ImmutableSet<Location> locations, final Set<org.jclouds.compute.domain.Image> images,
    Map<String, Credentials> credentialStore) {
 Map<InstanceState, Status> instanceToNodeStatus = EC2ComputeServiceDependenciesModule.toPortableNodeStatus;
 CacheLoader<RegionAndName, Image> getRealImage = new CacheLoader<RegionAndName, Image>() {
   @Override
   public Image load(@Nullable RegionAndName from) {
    return ImagesToRegionAndIdMap.imagesToMap(images).get(from);
   }
 };
 LoadingCache<RegionAndName, Image> instanceToImage = CacheBuilder.newBuilder().build(getRealImage);
 return createNodeParser(hardware, locations, credentialStore, instanceToNodeStatus, instanceToImage);
}

public static Map<RegionAndName, ? extends Image> imagesToMap(Iterable<? extends Image> input) {
 return new ImagesToRegionAndIdMap().apply(input);
}

@Override
public KeyPair apply(RegionAndName from) {
 return createNewKeyPairInRegion(from.getRegion(), from.getName());
}

private Location getLocationForAvailabilityZoneOrRegion(final RunningInstance instance) {
 Location location = findLocationWithId(instance.getAvailabilityZone());
 if (location == null)
   location = findLocationWithId(instance.getRegion());
 return location;
}

private void checkGroupName(RunningInstance instance) {
 assertEquals("groupname", createNodeParser(ImmutableSet.<Hardware> of(), ImmutableSet
    .<Location> of(), ImmutableSet.<Image> of(), ImmutableMap.<String, Credentials> of())
    .apply(instance).getGroup());
}

protected RunningInstanceToNodeMetadata createNodeParser(final ImmutableSet<Hardware> hardware,
    final ImmutableSet<Location> locations, final Set<org.jclouds.compute.domain.Image> images,
    Map<String, Credentials> credentialStore) {
 Map<InstanceState, Status> instanceToNodeStatus = EC2ComputeServiceDependenciesModule.toPortableNodeStatus;
 CacheLoader<RegionAndName, Image> getRealImage = new CacheLoader<RegionAndName, Image>() {
   @Override
   public Image load(@Nullable RegionAndName from) {
    return ImagesToRegionAndIdMap.imagesToMap(images).get(from);
   }
 };
 LoadingCache<RegionAndName, Image> instanceToImage = CacheBuilder.newBuilder().build(getRealImage);
 return createNodeParser(hardware, locations, credentialStore, instanceToNodeStatus, instanceToImage);
}

public static Map<RegionAndName, ? extends Image> imagesToMap(Iterable<? extends Image> input) {
 return new ImagesToRegionAndIdMap().apply(input);
}

@Override
public KeyPair apply(RegionAndName from) {
 return createNewKeyPairInRegion(from.getRegion(), from.getName());
}

private Location getLocationForAvailabilityZoneOrRegion(final RunningInstance instance) {
 Location location = findLocationWithId(instance.getAvailabilityZone());
 if (location == null)
   location = findLocationWithId(instance.getRegion());
 return location;
}

public static Map<RegionAndName, ? extends Image> imagesToMap(Iterable<? extends Image> input) {
 return new ImagesToRegionAndIdMap().apply(input);
}

@Override
public KeyPair apply(RegionAndName from) {
 return createNewKeyPairInRegion(from.getRegion(), from.getName());
}

private Location getLocationForAvailabilityZoneOrRegion(final RunningInstance instance) {
 Location location = findLocationWithId(instance.getAvailabilityZone());
 if (location == null)
   location = findLocationWithId(instance.getRegion());
 return location;
}

public static Map<RegionAndName, ? extends Image> imagesToMap(Iterable<? extends Image> input) {
 return new ImagesToRegionAndIdMap().apply(input);
}

@Override
public KeyPair apply(RegionAndName from) {
 return createNewKeyPairInRegion(from.getRegion(), from.getName());
}

private Location getLocationForAvailabilityZoneOrRegion(final RunningInstance instance) {
 Location location = findLocationWithId(instance.getAvailabilityZone());
 if (location == null)
   location = findLocationWithId(instance.getRegion());
 return location;
}