/*
* 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.rds.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.rds.RDSApi;
import org.jclouds.rds.domain.Instance;
import org.jclouds.rds.features.InstanceApi;
import org.jclouds.rds.options.ListInstancesOptions;
import com.google.common.annotations.Beta;
import com.google.common.base.Function;
import com.google.common.base.Optional;
@Beta
public class InstancesToPagedIterable extends Arg0ToPagedIterable.FromCaller<Instance, InstancesToPagedIterable> {
private final RDSApi api;
@Inject
protected InstancesToPagedIterable(RDSApi api) {
this.api = checkNotNull(api, "api");
}
@Override
protected Function<Object, IterableWithMarker<Instance>> markerToNextForArg0(Optional<Object> arg0) {
final String region = arg0.isPresent() ? arg0.get().toString() : null;
final InstanceApi instanceApi = api.getInstanceApiForRegion(region);
return new Function<Object, IterableWithMarker<Instance>>() {
@Override
public IterableWithMarker<Instance> apply(Object input) {
return instanceApi.list(ListInstancesOptions.Builder.afterMarker(input));
}
@Override
public String toString() {
return "listInstancesInRegion(" + region + ")";
}
};
}
}