}

    /**
     * Checks if the specified sort value is valid for facet sorting.
     *
     * @param sort the sort value to check
     * @return true if the sort value is valid for facets ("count" or "index"), false otherwise
     */
    public boolean isFacetSortValue(final String sort) {
        return "count".equals(sort) || "index".equals(sort);
    }

    /**

        this.params = params;
        return this;
    }

    /**
     * Sets the sort field for the query.
     * This method follows the builder pattern for method chaining.
     *
     * @param sortField the field name to sort by
     * @return this QueryStringBuilder instance for method chaining
     */
    public QueryStringBuilder sortField(final String sortField) {

            if (queryBuilder != null) {
                builder.setQuery(queryBuilder);
            }
            _conditionQuery.getFieldSortBuilderList().forEach(sort -> {
                builder.addSort(sort);
            });
        }

        if (_conditionAggregation != null) {
            _conditionAggregation.getAggregationBuilderList().forEach(builder::addAggregation);
        }

 * Double#NaN NaN}. (This is the one occasion when the behaviour is not the same as you'd get from
 * sorting with {@link java.util.Arrays#sort(double[]) Arrays.sort(double[])} or {@link
 * java.util.Collections#sort(java.util.List) Collections.sort(List<Double>)} and selecting
 * the required value(s). Those methods would sort {@link Double#NaN NaN} as if it is greater than
 * any other value and place them at the end of the dataset, even after {@link

import static com.google.common.collect.testing.Helpers.equal;
import static com.google.common.collect.testing.Helpers.mapEntry;
import static java.util.Arrays.asList;
import static java.util.Collections.sort;

import com.google.common.annotations.GwtCompatible;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

		<pre>title:Fess</pre>
		標準で利用可能なフィールドは url, host, site, title, content,
		content_length, last_modified および mimetype になります。
		設定で指定するフィールドは変更することができます。
	</dd>
	<dt>ソート</dt>
	<dd>
		sort 演算子は指定したフィールド名でドキュメントをソートします。
		sort 演算子の利用方法は sort:&lt;field&gt;.&lt;order&gt; になります。
		&lt;order&gt; は asc または desc で昇順・降順を指定できます。
		たとえば、Fess を含むドキュメントでサイズの降順にソートしたい場合、次のように入力します。
		<pre>Fess sort:content_length.desc</pre>

            if (queryBuilder != null) {
                builder.setQuery(queryBuilder);
            }
            _conditionQuery.getFieldSortBuilderList().forEach(sort -> {
                builder.addSort(sort);
            });
        }

        if (_conditionAggregation != null) {
            _conditionAggregation.getAggregationBuilderList().forEach(builder::addAggregation);
        }

            if (queryBuilder != null) {
                builder.setQuery(queryBuilder);
            }
            _conditionQuery.getFieldSortBuilderList().forEach(sort -> {
                builder.addSort(sort);
            });
        }

        if (_conditionAggregation != null) {
            _conditionAggregation.getAggregationBuilderList().forEach(builder::addAggregation);
        }

            if (queryBuilder != null) {
                builder.setQuery(queryBuilder);
            }
            _conditionQuery.getFieldSortBuilderList().forEach(sort -> {
                builder.addSort(sort);
            });
        }

        if (_conditionAggregation != null) {
            _conditionAggregation.getAggregationBuilderList().forEach(builder::addAggregation);
        }

		<pre>title:Fess</pre>
		기본으로 사용 가능한 필드는 url, host, site, title content,
		content_length, last_modified 및 mimetype입니다.
		설정에서 지정하는 필드는 변경할 수 있습니다.
	</dd>
	<dt>정렬</dt>
	<dd>
		sort 연산자는 지정된 필드 이름으로 문서를 정렬합니다.
		sort 연산자의 사용 방법은 sort:&lt;field&gt;.&lt;order&gt;입니다.
		&lt;order&gt; 는 asc 또는 desc 오름차순 · 내림차순을 지정할 수 있습니다.
		예를 들어, Fess를 포함한 문서 크기의 내림차순으로 정렬하려면 다음과 같이 입력합니다.
		<pre>Fess sort:content_length.desc</pre>