/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds licenses this file
 * to you 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.gogrid.compute.suppliers;

import static org.jclouds.gogrid.reference.GoGridConstants.PROPERTY_GOGRID_DEFAULT_DC;

import java.util.Set;

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

import org.jclouds.collect.Memoized;
import org.jclouds.domain.Location;

import com.google.common.base.Predicate;
import com.google.common.base.Supplier;
import com.google.common.collect.Iterables;

/**
 * 
 * @author Adrian Cole
 */
@Singleton
public class GoGridDefaultLocationSupplier implements Supplier<Location> {
   private final Supplier<Set<? extends Location>> locations;
   private final String defaultDC;

   @Inject
   GoGridDefaultLocationSupplier(@Memoized Supplier<Set<? extends Location>> locations,
            @Named(PROPERTY_GOGRID_DEFAULT_DC) String defaultDC) {
      this.locations = locations;
      this.defaultDC = defaultDC;
   }

   @Override
   public Location get() {
      return Iterables.find(locations.get(), new Predicate<Location>() {

         @Override
         public boolean apply(Location input) {
            return input.getId().equals(defaultDC);
         }

      });
   }
}