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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.ParseField;
import org.elasticsearch.common.xcontent.ObjectParser;
import org.elasticsearch.common.xcontent.ObjectParser.ValueType;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.search.aggregations.pipeline.ParsedSimpleValue;
import java.io.IOException;
public class ParsedDerivative extends ParsedSimpleValue implements Derivative {
private double normalizedValue;
private String normalizedAsString;
private boolean hasNormalizationFactor;
private static final ParseField NORMALIZED_AS_STRING = new ParseField("normalized_value_as_string");
private static final ParseField NORMALIZED = new ParseField("normalized_value");
@Override
public double normalizedValue() {
return this.normalizedValue;
}
@Override
protected String getType() {
return DerivativePipelineAggregationBuilder.NAME;
}
private static final ObjectParser<ParsedDerivative, Void> PARSER = new ObjectParser<>(ParsedDerivative.class.getSimpleName(), true,
ParsedDerivative::new);
static {
declareSingleValueFields(PARSER, Double.NaN);
PARSER.declareField((agg, normalized) -> {
agg.normalizedValue = normalized;
agg.hasNormalizationFactor = true;
}, (parser, context) -> parseValue(parser, Double.NaN), NORMALIZED, ValueType.DOUBLE_OR_NULL);
PARSER.declareString((agg, normalAsString) -> agg.normalizedAsString = normalAsString, NORMALIZED_AS_STRING);
}
public static ParsedDerivative fromXContent(XContentParser parser, final String name) {
ParsedDerivative derivative = PARSER.apply(parser, null);
derivative.setName(name);
return derivative;
}
@Override
protected XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
super.doXContentBody(builder, params);
if (hasNormalizationFactor) {
boolean hasValue = Double.isNaN(normalizedValue) == false;
builder.field(NORMALIZED.getPreferredName(), hasValue ? normalizedValue : null);
if (hasValue && normalizedAsString != null) {
builder.field(NORMALIZED_AS_STRING.getPreferredName(), normalizedAsString);
}
}
return builder;
}
}
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