/*
 * 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.iam.functions;

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

import javax.inject.Inject;

import org.jclouds.collect.IterableWithMarker;
import org.jclouds.collect.internal.Arg0ToPagedIterable;
import org.jclouds.iam.IAMApi;
import org.jclouds.iam.domain.InstanceProfile;
import org.jclouds.iam.features.RoleApi;

import com.google.common.annotations.Beta;
import com.google.common.base.Function;
import com.google.common.base.Optional;

@Beta
public class InstanceProfilesForRoleToPagedIterable extends
      Arg0ToPagedIterable<InstanceProfile, InstanceProfilesForRoleToPagedIterable> {

   private final RoleApi api;

   @Inject
   protected InstanceProfilesForRoleToPagedIterable(IAMApi api) {
      this.api = checkNotNull(api, "api").getRoleApi();
   }

   @Override
   protected Function<Object, IterableWithMarker<InstanceProfile>> markerToNextForArg0(Optional<Object> name) {
      return new ListInstanceProfilesPrefixAtMarker(api, name.get().toString());
   }

   private static class ListInstanceProfilesPrefixAtMarker implements
         Function<Object, IterableWithMarker<InstanceProfile>> {
      private final RoleApi api;
      private final String name;

      @Inject
      protected ListInstanceProfilesPrefixAtMarker(RoleApi api, String name) {
         this.api = checkNotNull(api, "api");
         this.name = checkNotNull(name, "name");
      }

      public IterableWithMarker<InstanceProfile> apply(Object input) {
         return api.listInstanceProfilesAt(name, input.toString());
      }

      public String toString() {
         return "ListInstanceProfilesPrefixAtMarker(" + name + ")";
      }
   }
}