/*
* 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.rackspace.autoscale.v1.functions;
import static com.google.common.base.Preconditions.checkNotNull;
import java.net.URI;
import java.util.List;
import java.util.Map;
import org.jclouds.http.HttpResponse;
import org.jclouds.http.functions.ParseJson;
import org.jclouds.openstack.v2_0.domain.Link;
import org.jclouds.openstack.v2_0.domain.Link.Relation;
import org.jclouds.rackspace.autoscale.v1.domain.ScalingPolicy.ScalingPolicyTargetType;
import org.jclouds.rackspace.autoscale.v1.domain.ScalingPolicy.ScalingPolicyType;
import org.jclouds.rackspace.autoscale.v1.domain.ScalingPolicyResponse;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import com.google.common.math.DoubleMath;
import com.google.inject.Inject;
/**
* This parses the scaling policy response and decouples domain objects from the json object returned by the service.
* @author Zack Shoylev
*/
public class ParseScalingPolicyResponse implements Function<HttpResponse, ScalingPolicyResponse> {
private final ParseJson<Map<String, Object>> json;
@Inject
ParseScalingPolicyResponse(ParseJson<Map<String, Object>> json) {
this.json = checkNotNull(json, "json");
}
/**
* Parse a single scaling policy response
*/
@SuppressWarnings("unchecked")
public ScalingPolicyResponse apply(HttpResponse from) {
// This needs to be refactored when the service is in a more final state and changing less often
// A lot of the complexity is expected to go away
Map<String, Object> singleMap = json.apply(from);
Map<String, Object> scalingPolicyMap = (Map<String, Object>) singleMap.get("policy");
ScalingPolicyTargetType targetType = null;
for(String key : scalingPolicyMap.keySet()) {
if(ScalingPolicyTargetType.getByValue(key).isPresent()) {
targetType = ScalingPolicyTargetType.getByValue(key).get();
break;
}
}
ImmutableList.Builder<Link> links = ImmutableList.builder();
for(Map<String, String> linkMap : (List<Map<String, String>>) scalingPolicyMap.get("links")) {
Link link = Link.builder().href(URI.create(linkMap.get("href"))).relation(Relation.fromValue(linkMap.get("rel"))).build();
links.add(link);
}
Double d = (Double)scalingPolicyMap.get(targetType.toString()); // GSON only knows double now
ScalingPolicyResponse scalingPolicyResponse =
new ScalingPolicyResponse(
(String)scalingPolicyMap.get("name"),
ScalingPolicyType.getByValue((String)scalingPolicyMap.get("type")).get(),
((Double)scalingPolicyMap.get("cooldown")).intValue(),
DoubleMath.isMathematicalInteger(d) ? Integer.toString(d.intValue()) : Double.toString(d),
targetType,
ImmutableList.copyOf(links.build()),
(String) scalingPolicyMap.get("id")
);
return scalingPolicyResponse;
}
}