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ParsedScriptedMetric.java
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ParsedScriptedMetric.java
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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.metrics.scripted;
import org.elasticsearch.common.bytes.BytesArray;
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.common.xcontent.XContentParser.Token;
import org.elasticsearch.search.aggregations.ParsedAggregation;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
public class ParsedScriptedMetric extends ParsedAggregation implements ScriptedMetric {
private List<Object> aggregation;
@Override
public String getType() {
return ScriptedMetricAggregationBuilder.NAME;
}
@Override
public Object aggregation() {
assert aggregation.size() == 1; // see InternalScriptedMetric#aggregations() for why we can assume this
return aggregation.get(0);
}
@Override
public XContentBuilder doXContentBody(XContentBuilder builder, Params params) throws IOException {
return builder.field(CommonFields.VALUE.getPreferredName(), aggregation());
}
private static final ObjectParser<ParsedScriptedMetric, Void> PARSER = new ObjectParser<>(ParsedScriptedMetric.class.getSimpleName(), true,
ParsedScriptedMetric::new);
static {
declareAggregationFields(PARSER);
PARSER.declareField((agg, value) -> agg.aggregation = Collections.singletonList(value),
ParsedScriptedMetric::parseValue, CommonFields.VALUE, ValueType.VALUE_OBJECT_ARRAY);
}
private static Object parseValue(XContentParser parser) throws IOException {
Token token = parser.currentToken();
Object value = null;
if (token == XContentParser.Token.VALUE_NULL) {
value = null;
} else if (token.isValue()) {
if (token == XContentParser.Token.VALUE_STRING) {
//binary values will be parsed back and returned as base64 strings when reading from json and yaml
value = parser.text();
} else if (token == XContentParser.Token.VALUE_NUMBER) {
value = parser.numberValue();
} else if (token == XContentParser.Token.VALUE_BOOLEAN) {
value = parser.booleanValue();
} else if (token == XContentParser.Token.VALUE_EMBEDDED_OBJECT) {
//binary values will be parsed back and returned as BytesArray when reading from cbor and smile
value = new BytesArray(parser.binaryValue());
}
} else if (token == XContentParser.Token.START_OBJECT) {
value = parser.map();
} else if (token == XContentParser.Token.START_ARRAY) {
value = parser.list();
}
return value;
}
public static ParsedScriptedMetric fromXContent(XContentParser parser, final String name) {
ParsedScriptedMetric aggregation = PARSER.apply(parser, null);
aggregation.setName(name);
return aggregation;
}
}