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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.search.aggregations.pipeline.derivative;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramInterval;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregatorBuilder;
import org.elasticsearch.search.aggregations.pipeline.BucketHelpers.GapPolicy;
import java.io.IOException;
public class DerivativeBuilder extends PipelineAggregatorBuilder<DerivativeBuilder> {
private String format;
private GapPolicy gapPolicy;
private String unit;
public DerivativeBuilder(String name) {
super(name, DerivativePipelineAggregator.TYPE.name());
}
public DerivativeBuilder format(String format) {
this.format = format;
return this;
}
public DerivativeBuilder gapPolicy(GapPolicy gapPolicy) {
this.gapPolicy = gapPolicy;
return this;
}
public DerivativeBuilder unit(String unit) {
this.unit = unit;
return this;
}
/**
* Sets the unit using the provided {@link DateHistogramInterval}. This
* method is only useful when calculating the derivative using a
* `date_histogram`
*/
public DerivativeBuilder unit(DateHistogramInterval unit) {
this.unit = unit.toString();
return this;
}
@Override
protected XContentBuilder internalXContent(XContentBuilder builder, Params params) throws IOException {
if (format != null) {
builder.field(DerivativeParser.FORMAT.getPreferredName(), format);
}
if (gapPolicy != null) {
builder.field(DerivativeParser.GAP_POLICY.getPreferredName(), gapPolicy.getName());
}
if (unit != null) {
builder.field(DerivativeParser.UNIT.getPreferredName(), unit);
}
return builder;
}
}
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