Package org.jclouds.openstack.neutron.v2.functions

Source Code of org.jclouds.openstack.neutron.v2.functions.PortsToPagedIterable

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.openstack.neutron.v2.functions;

import com.google.common.base.Function;
import com.google.common.base.Optional;
import org.jclouds.collect.IterableWithMarker;
import org.jclouds.collect.internal.Arg0ToPagedIterable;
import org.jclouds.openstack.neutron.v2.NeutronApi;
import org.jclouds.openstack.neutron.v2.domain.Port;
import org.jclouds.openstack.neutron.v2.features.PortApi;
import org.jclouds.openstack.v2_0.options.PaginationOptions;

import javax.inject.Inject;

import static com.google.common.base.Preconditions.checkNotNull;

/**
* Ensures Ports works as a paged iterable.
*/
public class PortsToPagedIterable extends Arg0ToPagedIterable.FromCaller<Port, PortsToPagedIterable> {

   private final NeutronApi api;

   @Inject
   protected PortsToPagedIterable(NeutronApi api) {
      this.api = checkNotNull(api, "api");
   }

   @Override
   protected Function<Object, IterableWithMarker<Port>> markerToNextForArg0(Optional<Object> arg0) {
      String region = arg0.isPresent() ? arg0.get().toString() : null;
      final PortApi portApi = api.getPortApi(region);
      return new Function<Object, IterableWithMarker<Port>>() {

         @SuppressWarnings("unchecked")
         @Override
         public IterableWithMarker<Port> apply(Object input) {
            PaginationOptions paginationOptions = PaginationOptions.class.cast(input);
            return IterableWithMarker.class.cast(portApi.list(paginationOptions));
         }

         @Override
         public String toString() {
            return "listPortsInDetail()";
         }
      };
   }

}
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