/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed 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.springframework.xd.dirt.rest.metrics;
import java.util.Date;
import org.joda.time.DateTime;
import org.joda.time.ReadablePeriod;
import org.springframework.hateoas.mvc.ResourceAssemblerSupport;
import org.springframework.xd.analytics.metrics.core.AggregateCount;
import org.springframework.xd.rest.domain.metrics.AggregateCountsResource;
/**
* Knows how to construct {@link AggregateCountsResource} out of {@link AggregateCount}.
*
* @author Eric Bottard
*/
public class DeepAggregateCountResourceAssembler extends
ResourceAssemblerSupport<AggregateCount, AggregateCountsResource> {
public DeepAggregateCountResourceAssembler() {
super(AggregateCountersController.class, AggregateCountsResource.class);
}
@Override
public AggregateCountsResource toResource(AggregateCount entity) {
return createResourceWithId(entity.getName(), entity);
}
@Override
protected AggregateCountsResource instantiateResource(AggregateCount entity) {
AggregateCountsResource result = new AggregateCountsResource(entity.getName());
ReadablePeriod increment = entity.getResolution().unitPeriod;
DateTime end = entity.getInterval().getEnd();
int i = 0;
for (DateTime when = entity.getInterval().getStart(); !when.isAfter(end); when = when.plus(increment)) {
result.addValue(new Date(when.getMillis()), entity.getCounts()[i++]);
}
return result;
}
}