org.elasticsearch.search.aggregations.metrics.ValuesSourceMetricsAggregatorParser Maven / Gradle / Ivy
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* 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
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* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.search.aggregations.metrics;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.fielddata.IndexFieldData;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.search.SearchParseException;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.AggregatorFactory;
import org.elasticsearch.search.aggregations.support.FieldContext;
import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
import org.elasticsearch.search.aggregations.support.numeric.NumericValuesSource;
import org.elasticsearch.search.internal.SearchContext;
import java.io.IOException;
import java.util.Map;
/**
*
*/
public abstract class ValuesSourceMetricsAggregatorParser implements Aggregator.Parser {
protected boolean requiresSortedValues() {
return false;
}
@Override
public AggregatorFactory parse(String aggregationName, XContentParser parser, SearchContext context) throws IOException {
ValuesSourceConfig config = new ValuesSourceConfig(NumericValuesSource.class);
String field = null;
String script = null;
String scriptLang = null;
Map scriptParams = null;
boolean assumeSorted = false;
XContentParser.Token token;
String currentFieldName = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.VALUE_STRING) {
if ("field".equals(currentFieldName)) {
field = parser.text();
} else if ("script".equals(currentFieldName)) {
script = parser.text();
} else if ("lang".equals(currentFieldName)) {
scriptLang = parser.text();
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: [" + currentFieldName + "].");
}
} else if (token == XContentParser.Token.START_OBJECT) {
if ("params".equals(currentFieldName)) {
scriptParams = parser.map();
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: [" + currentFieldName + "].");
}
} else if (token == XContentParser.Token.VALUE_BOOLEAN) {
if ("script_values_sorted".equals(currentFieldName)) {
assumeSorted = parser.booleanValue();
} else {
throw new SearchParseException(context, "Unknown key for a " + token + " in [" + aggregationName + "]: [" + currentFieldName + "].");
}
} else {
throw new SearchParseException(context, "Unexpected token " + token + " in [" + aggregationName + "].");
}
}
if (script != null) {
config.script(context.scriptService().search(context.lookup(), scriptLang, script, scriptParams));
}
if (!assumeSorted && requiresSortedValues()) {
config.ensureSorted(true);
}
if (field == null) {
return createFactory(aggregationName, config);
}
FieldMapper mapper = context.smartNameFieldMapper(field);
if (mapper == null) {
config.unmapped(true);
return createFactory(aggregationName, config);
}
IndexFieldData indexFieldData = context.fieldData().getForField(mapper);
config.fieldContext(new FieldContext(field, indexFieldData));
return createFactory(aggregationName, config);
}
protected abstract AggregatorFactory createFactory(String aggregationName, ValuesSourceConfig config);
}