org.elasticsearch.search.aggregations.metrics.cardinality.CardinalityParser Maven / Gradle / Ivy

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 * the Apache License, Version 2.0 (the "License"); you may
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 *
 *    http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.search.aggregations.metrics.cardinality;

import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.xcontent.XContentParser.Token;
import org.elasticsearch.search.aggregations.support.AbstractValuesSourceParser.AnyValuesSourceParser;
import org.elasticsearch.search.aggregations.support.XContentParseContext;
import org.elasticsearch.search.aggregations.support.ValueType;
import org.elasticsearch.search.aggregations.support.ValuesSourceType;

import java.io.IOException;
import java.util.Map;


public class CardinalityParser extends AnyValuesSourceParser {

    private static final ParseField REHASH = new ParseField("rehash").withAllDeprecated("no replacement - values will always be rehashed");

    public CardinalityParser() {
        super(true, false);
    }

    @Override
    protected CardinalityAggregationBuilder createFactory(String aggregationName, ValuesSourceType valuesSourceType,
                                                          ValueType targetValueType, Map otherOptions) {
        CardinalityAggregationBuilder factory = new CardinalityAggregationBuilder(aggregationName, targetValueType);
        Long precisionThreshold = (Long) otherOptions.get(CardinalityAggregationBuilder.PRECISION_THRESHOLD_FIELD);
        if (precisionThreshold != null) {
            factory.precisionThreshold(precisionThreshold);
        }
        return factory;
    }

    @Override
    protected boolean token(String aggregationName, String currentFieldName, Token token,
                            XContentParseContext context, Map otherOptions) throws IOException {
        if (token.isValue()) {
            if (context.matchField(currentFieldName, CardinalityAggregationBuilder.PRECISION_THRESHOLD_FIELD)) {
                otherOptions.put(CardinalityAggregationBuilder.PRECISION_THRESHOLD_FIELD, context.getParser().longValue());
                return true;
            } else if (context.matchField(currentFieldName, REHASH)) {
                // ignore
                return true;
            }
        }
        return false;
    }
}