org.jclouds.location.suppliers.ZoneToRegionToProviderOrJustProvider.java Source code

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Here is the source code for org.jclouds.location.suppliers.ZoneToRegionToProviderOrJustProvider.java

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/**
 *
 * Copyright (C) 2010 Cloud Conscious, LLC. <info@cloudconscious.com>
 *
 * ====================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ====================================================================
 */

package org.jclouds.location.suppliers;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.Maps.uniqueIndex;

import java.net.URI;
import java.util.Map;
import java.util.Set;

import javax.inject.Inject;
import javax.inject.Singleton;

import org.jclouds.domain.Location;
import org.jclouds.domain.LocationBuilder;
import org.jclouds.domain.LocationScope;
import org.jclouds.location.Iso3166;
import org.jclouds.location.Provider;
import org.jclouds.location.Zone;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSet.Builder;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public class ZoneToRegionToProviderOrJustProvider extends RegionToProviderOrJustProvider {
    private final Map<String, String> zoneToRegion;
    private Map<String, Set<String>> isoCodesById;

    @Inject
    ZoneToRegionToProviderOrJustProvider(@Iso3166 Set<String> isoCodes, @Provider String providerName,
            @Provider URI endpoint, @Iso3166 Map<String, Set<String>> isoCodesById,
            @Zone Map<String, String> zoneToRegion) {
        super(isoCodes, providerName, endpoint,
                ImmutableSet.copyOf(checkNotNull(zoneToRegion, "zoneToRegion").values()), isoCodesById);
        this.zoneToRegion = zoneToRegion;
        this.isoCodesById = checkNotNull(isoCodesById, "isoCodesById");
    }

    @Override
    public Set<? extends Location> get() {
        Builder<Location> locations = buildJustProviderOrRegions();
        ImmutableMap<String, Location> idToLocation = uniqueIndex(locations.build(),
                new Function<Location, String>() {
                    @Override
                    public String apply(Location from) {
                        return from.getId();
                    }
                });
        if (zoneToRegion.size() == 1)
            return locations.build();
        for (String zone : zoneToRegion.keySet()) {
            Location parent = idToLocation.get(zoneToRegion.get(zone));
            LocationBuilder builder = new LocationBuilder().scope(LocationScope.ZONE).id(zone).description(zone)
                    .parent(parent);
            if (isoCodesById.containsKey(zone))
                builder.iso3166Codes(isoCodesById.get(zone));
            // be cautious.. only inherit iso codes if the parent is a region
            // regions may be added dynamically, and we prefer to inherit an
            // empty set of codes from a region, then a provider, whose code
            // are likely hard-coded.
            else if (parent.getScope() == LocationScope.REGION)
                builder.iso3166Codes(parent.getIso3166Codes());
            locations.add(builder.build());
        }
        return locations.build();
    }
}