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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.builder;

import org.apache.logging.log4j.LogManager;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.Version;
import org.elasticsearch.common.Booleans;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.ParsingException;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.common.logging.DeprecationLogger;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.ToXContentFragment;
import org.elasticsearch.common.xcontent.ToXContentObject;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentHelper;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryRewriteContext;
import org.elasticsearch.index.query.Rewriteable;
import org.elasticsearch.script.Script;
import org.elasticsearch.search.SearchExtBuilder;
import org.elasticsearch.search.aggregations.AggregationBuilder;
import org.elasticsearch.search.aggregations.AggregatorFactories;
import org.elasticsearch.search.aggregations.PipelineAggregationBuilder;
import org.elasticsearch.search.collapse.CollapseBuilder;
import org.elasticsearch.search.fetch.StoredFieldsContext;
import org.elasticsearch.search.fetch.subphase.FetchDocValuesContext.FieldAndFormat;
import org.elasticsearch.search.fetch.subphase.FetchSourceContext;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.internal.SearchContext;
import org.elasticsearch.search.rescore.RescorerBuilder;
import org.elasticsearch.search.searchafter.SearchAfterBuilder;
import org.elasticsearch.search.slice.SliceBuilder;
import org.elasticsearch.search.sort.ScoreSortBuilder;
import org.elasticsearch.search.sort.SortBuilder;
import org.elasticsearch.search.sort.SortBuilders;
import org.elasticsearch.search.sort.SortOrder;
import org.elasticsearch.search.suggest.SuggestBuilder;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

import static org.elasticsearch.index.query.AbstractQueryBuilder.parseInnerQueryBuilder;
import static org.elasticsearch.search.internal.SearchContext.TRACK_TOTAL_HITS_ACCURATE;
import static org.elasticsearch.search.internal.SearchContext.TRACK_TOTAL_HITS_DISABLED;

/**
 * A search source builder allowing to easily build search source. Simple
 * construction using
 * {@link org.elasticsearch.search.builder.SearchSourceBuilder#searchSource()}.
 *
 * @see org.elasticsearch.action.search.SearchRequest#source(SearchSourceBuilder)
 */
public final class SearchSourceBuilder implements Writeable, ToXContentObject, Rewriteable {
    private static final DeprecationLogger deprecationLogger =
        new DeprecationLogger(LogManager.getLogger(SearchSourceBuilder.class));

    public static final ParseField FROM_FIELD = new ParseField("from");
    public static final ParseField SIZE_FIELD = new ParseField("size");
    public static final ParseField TIMEOUT_FIELD = new ParseField("timeout");
    public static final ParseField TERMINATE_AFTER_FIELD = new ParseField("terminate_after");
    public static final ParseField QUERY_FIELD = new ParseField("query");
    public static final ParseField POST_FILTER_FIELD = new ParseField("post_filter");
    public static final ParseField MIN_SCORE_FIELD = new ParseField("min_score");
    public static final ParseField VERSION_FIELD = new ParseField("version");
    public static final ParseField SEQ_NO_PRIMARY_TERM_FIELD = new ParseField("seq_no_primary_term");
    public static final ParseField EXPLAIN_FIELD = new ParseField("explain");
    public static final ParseField _SOURCE_FIELD = new ParseField("_source");
    public static final ParseField STORED_FIELDS_FIELD = new ParseField("stored_fields");
    public static final ParseField DOCVALUE_FIELDS_FIELD = new ParseField("docvalue_fields");
    public static final ParseField SCRIPT_FIELDS_FIELD = new ParseField("script_fields");
    public static final ParseField SCRIPT_FIELD = new ParseField("script");
    public static final ParseField IGNORE_FAILURE_FIELD = new ParseField("ignore_failure");
    public static final ParseField SORT_FIELD = new ParseField("sort");
    public static final ParseField TRACK_SCORES_FIELD = new ParseField("track_scores");
    public static final ParseField TRACK_TOTAL_HITS_FIELD = new ParseField("track_total_hits");
    public static final ParseField INDICES_BOOST_FIELD = new ParseField("indices_boost");
    public static final ParseField AGGREGATIONS_FIELD = new ParseField("aggregations");
    public static final ParseField AGGS_FIELD = new ParseField("aggs");
    public static final ParseField HIGHLIGHT_FIELD = new ParseField("highlight");
    public static final ParseField SUGGEST_FIELD = new ParseField("suggest");
    public static final ParseField RESCORE_FIELD = new ParseField("rescore");
    public static final ParseField STATS_FIELD = new ParseField("stats");
    public static final ParseField EXT_FIELD = new ParseField("ext");
    public static final ParseField PROFILE_FIELD = new ParseField("profile");
    public static final ParseField SEARCH_AFTER = new ParseField("search_after");
    public static final ParseField COLLAPSE = new ParseField("collapse");
    public static final ParseField SLICE = new ParseField("slice");

    public static SearchSourceBuilder fromXContent(XContentParser parser) throws IOException {
        return fromXContent(parser, true);
    }

    public static SearchSourceBuilder fromXContent(XContentParser parser, boolean checkTrailingTokens) throws IOException {
        SearchSourceBuilder builder = new SearchSourceBuilder();
        builder.parseXContent(parser, checkTrailingTokens);
        return builder;
    }

    /**
     * A static factory method to construct a new search source.
     */
    public static SearchSourceBuilder searchSource() {
        return new SearchSourceBuilder();
    }

    /**
     * A static factory method to construct new search highlights.
     */
    public static HighlightBuilder highlight() {
        return new HighlightBuilder();
    }

    private QueryBuilder queryBuilder;

    private QueryBuilder postQueryBuilder;

    private int from = -1;

    private int size = -1;

    private Boolean explain;

    private Boolean version;

    private Boolean seqNoAndPrimaryTerm;

    private List> sorts;

    private boolean trackScores = false;

    private Integer trackTotalHitsUpTo;

    private SearchAfterBuilder searchAfterBuilder;

    private SliceBuilder sliceBuilder;

    private Float minScore;

    private TimeValue timeout = null;
    private int terminateAfter = SearchContext.DEFAULT_TERMINATE_AFTER;

    private StoredFieldsContext storedFieldsContext;
    private List docValueFields;
    private List scriptFields;
    private FetchSourceContext fetchSourceContext;

    private AggregatorFactories.Builder aggregations;

    private HighlightBuilder highlightBuilder;

    private SuggestBuilder suggestBuilder;

    private List rescoreBuilders;

    private List indexBoosts = new ArrayList<>();

    private List stats;

    private List extBuilders = Collections.emptyList();

    private boolean profile = false;

    private CollapseBuilder collapse = null;

    /**
     * Constructs a new search source builder.
     */
    public SearchSourceBuilder() {
    }

    /**
     * Read from a stream.
     */
    public SearchSourceBuilder(StreamInput in) throws IOException {
        aggregations = in.readOptionalWriteable(AggregatorFactories.Builder::new);
        explain = in.readOptionalBoolean();
        fetchSourceContext = in.readOptionalWriteable(FetchSourceContext::new);
        if (in.getVersion().before(Version.V_6_4_0)) {
            List dvFields = (List) in.readGenericValue();
            if (dvFields == null) {
                docValueFields = null;
            } else {
                docValueFields = dvFields.stream()
                        .map(field -> new FieldAndFormat(field, null))
                        .collect(Collectors.toList());
            }
        } else {
            if (in.readBoolean()) {
                docValueFields = in.readList(FieldAndFormat::new);
            } else {
                docValueFields = null;
            }
        }
        storedFieldsContext = in.readOptionalWriteable(StoredFieldsContext::new);
        from = in.readVInt();
        highlightBuilder = in.readOptionalWriteable(HighlightBuilder::new);
        indexBoosts = in.readList(IndexBoost::new);
        minScore = in.readOptionalFloat();
        postQueryBuilder = in.readOptionalNamedWriteable(QueryBuilder.class);
        queryBuilder = in.readOptionalNamedWriteable(QueryBuilder.class);
        if (in.readBoolean()) {
            rescoreBuilders = in.readNamedWriteableList(RescorerBuilder.class);
        }
        if (in.readBoolean()) {
            scriptFields = in.readList(ScriptField::new);
        }
        size = in.readVInt();
        if (in.readBoolean()) {
            int size = in.readVInt();
            sorts = new ArrayList<>();
            for (int i = 0; i < size; i++) {
                sorts.add(in.readNamedWriteable(SortBuilder.class));
            }
        }
        if (in.readBoolean()) {
            stats = in.readStringList();
        }
        suggestBuilder = in.readOptionalWriteable(SuggestBuilder::new);
        terminateAfter = in.readVInt();
        timeout = in.readOptionalTimeValue();
        trackScores = in.readBoolean();
        version = in.readOptionalBoolean();
        if (in.getVersion().onOrAfter(Version.V_6_7_0)) {
            seqNoAndPrimaryTerm = in.readOptionalBoolean();
        } else {
            seqNoAndPrimaryTerm = null;
        }
        extBuilders = in.readNamedWriteableList(SearchExtBuilder.class);
        profile = in.readBoolean();
        searchAfterBuilder = in.readOptionalWriteable(SearchAfterBuilder::new);
        sliceBuilder = in.readOptionalWriteable(SliceBuilder::new);
        collapse = in.readOptionalWriteable(CollapseBuilder::new);
        if (in.getVersion().onOrAfter(Version.V_7_0_0)) {
            trackTotalHitsUpTo = in.readOptionalInt();
        } else {
            trackTotalHitsUpTo = in.readBoolean() ? TRACK_TOTAL_HITS_ACCURATE : TRACK_TOTAL_HITS_DISABLED;
        }
    }

    @Override
    public void writeTo(StreamOutput out) throws IOException {
        out.writeOptionalWriteable(aggregations);
        out.writeOptionalBoolean(explain);
        out.writeOptionalWriteable(fetchSourceContext);
        if (out.getVersion().before(Version.V_6_4_0)) {
            out.writeGenericValue(docValueFields == null
                    ? null
                    : docValueFields.stream().map(ff -> ff.field).collect(Collectors.toList()));
        } else {
            out.writeBoolean(docValueFields != null);
            if (docValueFields != null) {
                out.writeList(docValueFields);
            }
        }
        out.writeOptionalWriteable(storedFieldsContext);
        out.writeVInt(from);
        out.writeOptionalWriteable(highlightBuilder);
        out.writeList(indexBoosts);
        out.writeOptionalFloat(minScore);
        out.writeOptionalNamedWriteable(postQueryBuilder);
        out.writeOptionalNamedWriteable(queryBuilder);
        boolean hasRescoreBuilders = rescoreBuilders != null;
        out.writeBoolean(hasRescoreBuilders);
        if (hasRescoreBuilders) {
            out.writeNamedWriteableList(rescoreBuilders);
        }
        boolean hasScriptFields = scriptFields != null;
        out.writeBoolean(hasScriptFields);
        if (hasScriptFields) {
            out.writeList(scriptFields);
        }
        out.writeVInt(size);
        boolean hasSorts = sorts != null;
        out.writeBoolean(hasSorts);
        if (hasSorts) {
            out.writeVInt(sorts.size());
            for (SortBuilder sort : sorts) {
                out.writeNamedWriteable(sort);
            }
        }
        boolean hasStats = stats != null;
        out.writeBoolean(hasStats);
        if (hasStats) {
            out.writeStringCollection(stats);
        }
        out.writeOptionalWriteable(suggestBuilder);
        out.writeVInt(terminateAfter);
        out.writeOptionalTimeValue(timeout);
        out.writeBoolean(trackScores);
        out.writeOptionalBoolean(version);
        if (out.getVersion().onOrAfter(Version.V_6_7_0)) {
            out.writeOptionalBoolean(seqNoAndPrimaryTerm);
        }
        out.writeNamedWriteableList(extBuilders);
        out.writeBoolean(profile);
        out.writeOptionalWriteable(searchAfterBuilder);
        out.writeOptionalWriteable(sliceBuilder);
        out.writeOptionalWriteable(collapse);
        if (out.getVersion().onOrAfter(Version.V_7_0_0)) {
            out.writeOptionalInt(trackTotalHitsUpTo);
        } else {
            out.writeBoolean(trackTotalHitsUpTo == null ? true : trackTotalHitsUpTo > SearchContext.TRACK_TOTAL_HITS_DISABLED);
        }
    }

    /**
     * Sets the search query for this request.
     *
     * @see org.elasticsearch.index.query.QueryBuilders
     */
    public SearchSourceBuilder query(QueryBuilder query) {
        this.queryBuilder = query;
        return this;
    }

    /**
     * Gets the query for this request
     */
    public QueryBuilder query() {
        return queryBuilder;
    }

    /**
     * Sets a filter that will be executed after the query has been executed and
     * only has affect on the search hits (not aggregations). This filter is
     * always executed as last filtering mechanism.
     */
    public SearchSourceBuilder postFilter(QueryBuilder postFilter) {
        this.postQueryBuilder = postFilter;
        return this;
    }

    /**
     * Gets the post filter for this request
     */
    public QueryBuilder postFilter() {
        return postQueryBuilder;
    }

    /**
     * From index to start the search from. Defaults to {@code 0}.
     */
    public SearchSourceBuilder from(int from) {
        if (from < 0) {
            throw new IllegalArgumentException("[from] parameter cannot be negative");
        }
        this.from = from;
        return this;
    }

    /**
     * Gets the from index to start the search from.
     **/
    public int from() {
        return from;
    }

    /**
     * The number of search hits to return. Defaults to {@code 10}.
     */
    public SearchSourceBuilder size(int size) {
        if (size < 0) {
            throw new IllegalArgumentException("[size] parameter cannot be negative, found [" + size + "]");
        }
        this.size = size;
        return this;
    }

    /**
     * Gets the number of search hits to return.
     */
    public int size() {
        return size;
    }

    /**
     * Sets the minimum score below which docs will be filtered out.
     */
    public SearchSourceBuilder minScore(float minScore) {
        this.minScore = minScore;
        return this;
    }

    /**
     * Gets the minimum score below which docs will be filtered out.
     */
    public Float minScore() {
        return minScore;
    }

    /**
     * Should each {@link org.elasticsearch.search.SearchHit} be returned with
     * an explanation of the hit (ranking).
     */
    public SearchSourceBuilder explain(Boolean explain) {
        this.explain = explain;
        return this;
    }

    /**
     * Indicates whether each search hit will be returned with an explanation of
     * the hit (ranking)
     */
    public Boolean explain() {
        return explain;
    }

    /**
     * Should each {@link org.elasticsearch.search.SearchHit} be returned with a
     * version associated with it.
     */
    public SearchSourceBuilder version(Boolean version) {
        this.version = version;
        return this;
    }

    /**
     * Indicates whether the document's version will be included in the search
     * hits.
     */
    public Boolean version() {
        return version;
    }

    /**
     * Should each {@link org.elasticsearch.search.SearchHit} be returned with the
     * sequence number and primary term of the last modification of the document.
     */
    public SearchSourceBuilder seqNoAndPrimaryTerm(Boolean seqNoAndPrimaryTerm) {
        this.seqNoAndPrimaryTerm = seqNoAndPrimaryTerm;
        return this;
    }

    /**
     * Indicates whether {@link org.elasticsearch.search.SearchHit}s should be returned with the
     * sequence number and primary term of the last modification of the document.
     */
    public Boolean seqNoAndPrimaryTerm() {
        return seqNoAndPrimaryTerm;
    }

    /**
     * An optional timeout to control how long search is allowed to take.
     */
    public SearchSourceBuilder timeout(TimeValue timeout) {
        this.timeout = timeout;
        return this;
    }

    /**
     * Gets the timeout to control how long search is allowed to take.
     */
    public TimeValue timeout() {
        return timeout;
    }

    /**
     * An optional terminate_after to terminate the search after collecting
     * terminateAfter documents
     */
    public  SearchSourceBuilder terminateAfter(int terminateAfter) {
        if (terminateAfter < 0) {
            throw new IllegalArgumentException("terminateAfter must be > 0");
        }
        this.terminateAfter = terminateAfter;
        return this;
    }

    /**
     * Gets the number of documents to terminate after collecting.
     */
    public int terminateAfter() {
        return terminateAfter;
    }

    /**
     * Adds a sort against the given field name and the sort ordering.
     *
     * @param name
     *            The name of the field
     * @param order
     *            The sort ordering
     */
    public SearchSourceBuilder sort(String name, SortOrder order) {
        if (name.equals(ScoreSortBuilder.NAME)) {
            return sort(SortBuilders.scoreSort().order(order));
        }
        return sort(SortBuilders.fieldSort(name).order(order));
    }

    /**
     * Add a sort against the given field name.
     *
     * @param name
     *            The name of the field to sort by
     */
    public SearchSourceBuilder sort(String name) {
        if (name.equals(ScoreSortBuilder.NAME)) {
            return sort(SortBuilders.scoreSort());
        }
        return sort(SortBuilders.fieldSort(name));
    }

    /**
     * Adds a sort builder.
     */
    public SearchSourceBuilder sort(SortBuilder sort) {
            if (sorts == null) {
                sorts = new ArrayList<>();
            }
            sorts.add(sort);
            return this;
    }

    /**
     * Gets the bytes representing the sort builders for this request.
     */
    public List> sorts() {
        return sorts;
    }

    /**
     * Applies when sorting, and controls if scores will be tracked as well.
     * Defaults to {@code false}.
     */
    public SearchSourceBuilder trackScores(boolean trackScores) {
        this.trackScores = trackScores;
        return this;
    }

    /**
     * Indicates whether scores will be tracked for this request.
     */
    public boolean trackScores() {
        return trackScores;
    }

    /**
     * Indicates if the total hit count for the query should be tracked.
     */
    public SearchSourceBuilder trackTotalHits(boolean trackTotalHits) {
        this.trackTotalHitsUpTo = trackTotalHits ? TRACK_TOTAL_HITS_ACCURATE : TRACK_TOTAL_HITS_DISABLED;
        return this;
    }

    /**
     * Returns the total hit count that should be tracked or null if the value is unset.
     * Defaults to null.
     */
    @Nullable
    public Integer trackTotalHitsUpTo() {
        return trackTotalHitsUpTo;
    }

    public SearchSourceBuilder trackTotalHitsUpTo(int trackTotalHitsUpTo) {
        if (trackTotalHitsUpTo < TRACK_TOTAL_HITS_DISABLED) {
            throw new IllegalArgumentException("[track_total_hits] parameter must be positive or equals to -1, " +
                "got " + trackTotalHitsUpTo);
        }
        this.trackTotalHitsUpTo = trackTotalHitsUpTo;
        return this;
    }

    /**
     * The sort values that indicates which docs this request should "search after".
     * The sort values of the search_after must be equal to the number of sort fields in the query and they should be
     * of the same type (or parsable as such).
     * Defaults to {@code null}.
     */
    public Object[] searchAfter() {
        if (searchAfterBuilder == null) {
            return null;
        }
        return searchAfterBuilder.getSortValues();
    }

    /**
     * Set the sort values that indicates which docs this request should "search after".
     */
    public SearchSourceBuilder searchAfter(Object[] values) {
        this.searchAfterBuilder = new SearchAfterBuilder().setSortValues(values);
        return this;
    }

    /**
     * Sets a filter that will restrict the search hits, the top hits and the aggregations to a slice of the results
     * of the main query.
     */
    public SearchSourceBuilder slice(SliceBuilder builder) {
        this.sliceBuilder = builder;
        return this;
    }

    /**
     * Gets the slice used to filter the search hits, the top hits and the aggregations.
     */
    public SliceBuilder slice() {
        return sliceBuilder;
    }


    public CollapseBuilder collapse() {
        return collapse;
    }

    public SearchSourceBuilder collapse(CollapseBuilder collapse) {
        this.collapse = collapse;
        return this;
    }

    /**
     * Add an aggregation to perform as part of the search.
     */
    public SearchSourceBuilder aggregation(AggregationBuilder aggregation) {
        if (aggregations == null) {
            aggregations = AggregatorFactories.builder();
        }
        aggregations.addAggregator(aggregation);
        return this;
    }

    /**
     * Add an aggregation to perform as part of the search.
     */
    public SearchSourceBuilder aggregation(PipelineAggregationBuilder aggregation) {
        if (aggregations == null) {
            aggregations = AggregatorFactories.builder();
        }
        aggregations.addPipelineAggregator(aggregation);
        return this;
    }

    /**
     * Gets the bytes representing the aggregation builders for this request.
     */
    public AggregatorFactories.Builder aggregations() {
        return aggregations;
    }

    /**
     * Adds highlight to perform as part of the search.
     */
    public SearchSourceBuilder highlighter(HighlightBuilder highlightBuilder) {
        this.highlightBuilder = highlightBuilder;
        return this;
    }

    /**
     * Gets the highlighter builder for this request.
     */
    public HighlightBuilder highlighter() {
        return highlightBuilder;
    }

    public SearchSourceBuilder suggest(SuggestBuilder suggestBuilder) {
        this.suggestBuilder = suggestBuilder;
        return this;
    }

    /**
     * Gets the suggester builder for this request.
     */
    public SuggestBuilder suggest() {
        return suggestBuilder;
    }

    public SearchSourceBuilder addRescorer(RescorerBuilder rescoreBuilder) {
            if (rescoreBuilders == null) {
                rescoreBuilders = new ArrayList<>();
            }
            rescoreBuilders.add(rescoreBuilder);
            return this;
    }

    public SearchSourceBuilder clearRescorers() {
        rescoreBuilders = null;
        return this;
    }

    /**
     * Should the query be profiled. Defaults to {@code false}
     */
    public SearchSourceBuilder profile(boolean profile) {
        this.profile = profile;
        return this;
    }

    /**
     * Return whether to profile query execution, or {@code null} if
     * unspecified.
     */
    public boolean profile() {
        return profile;
    }

    /**
     * Gets the bytes representing the rescore builders for this request.
     */
    public List rescores() {
        return rescoreBuilders;
    }

    /**
     * Indicates whether the response should contain the stored _source for
     * every hit
     */
    public SearchSourceBuilder fetchSource(boolean fetch) {
        FetchSourceContext fetchSourceContext = this.fetchSourceContext != null ? this.fetchSourceContext
            : FetchSourceContext.FETCH_SOURCE;
        this.fetchSourceContext = new FetchSourceContext(fetch, fetchSourceContext.includes(), fetchSourceContext.excludes());
        return this;
    }

    /**
     * Indicate that _source should be returned with every hit, with an
     * "include" and/or "exclude" set which can include simple wildcard
     * elements.
     *
     * @param include
     *            An optional include (optionally wildcarded) pattern to filter
     *            the returned _source
     * @param exclude
     *            An optional exclude (optionally wildcarded) pattern to filter
     *            the returned _source
     */
    public SearchSourceBuilder fetchSource(@Nullable String include, @Nullable String exclude) {
        return fetchSource(include == null ? Strings.EMPTY_ARRAY : new String[] { include }, exclude == null ? Strings.EMPTY_ARRAY
                : new String[] { exclude });
    }

    /**
     * Indicate that _source should be returned with every hit, with an
     * "include" and/or "exclude" set which can include simple wildcard
     * elements.
     *
     * @param includes
     *            An optional list of include (optionally wildcarded) pattern to
     *            filter the returned _source
     * @param excludes
     *            An optional list of exclude (optionally wildcarded) pattern to
     *            filter the returned _source
     */
    public SearchSourceBuilder fetchSource(@Nullable String[] includes, @Nullable String[] excludes) {
        FetchSourceContext fetchSourceContext = this.fetchSourceContext != null ? this.fetchSourceContext
            : FetchSourceContext.FETCH_SOURCE;
        this.fetchSourceContext = new FetchSourceContext(fetchSourceContext.fetchSource(), includes, excludes);
        return this;
    }

    /**
     * Indicate how the _source should be fetched.
     */
    public SearchSourceBuilder fetchSource(@Nullable FetchSourceContext fetchSourceContext) {
        this.fetchSourceContext = fetchSourceContext;
        return this;
    }

    /**
     * Gets the {@link FetchSourceContext} which defines how the _source should
     * be fetched.
     */
    public FetchSourceContext fetchSource() {
        return fetchSourceContext;
    }

    /**
     * Adds a stored field to load and return as part of the
     * search request. If none are specified, the source of the document will be
     * return.
     */
    public SearchSourceBuilder storedField(String name) {
        return storedFields(Collections.singletonList(name));
    }

    /**
     * Sets the stored fields to load and return as part of the search request. If none
     * are specified, the source of the document will be returned.
     */
    public SearchSourceBuilder storedFields(List fields) {
        if (storedFieldsContext == null) {
            storedFieldsContext = StoredFieldsContext.fromList(fields);
        } else {
            storedFieldsContext.addFieldNames(fields);
        }
        return this;
    }

    /**
     * Indicates how the stored fields should be fetched.
     */
    public SearchSourceBuilder storedFields(StoredFieldsContext context) {
        storedFieldsContext = context;
        return this;
    }

    /**
     * Gets the stored fields context.
     */
    public StoredFieldsContext storedFields() {
        return storedFieldsContext;
    }

    /**
     * Gets the docvalue fields.
     */
    public List docValueFields() {
        return docValueFields;
    }

    /**
     * Adds a field to load from the doc values and return as part of the
     * search request.
     */
    public SearchSourceBuilder docValueField(String name, @Nullable String format) {
        if (docValueFields == null) {
            docValueFields = new ArrayList<>();
        }
        docValueFields.add(new FieldAndFormat(name, format));
        return this;
    }

    /**
     * Adds a field to load from the doc values and return as part of the
     * search request.
     */
    public SearchSourceBuilder docValueField(String name) {
        return docValueField(name, null);
    }

    /**
     * Adds a script field under the given name with the provided script.
     *
     * @param name
     *            The name of the field
     * @param script
     *            The script
     */
    public SearchSourceBuilder scriptField(String name, Script script) {
        scriptField(name, script, false);
        return this;
    }

    /**
     * Adds a script field under the given name with the provided script.
     *
     * @param name
     *            The name of the field
     * @param script
     *            The script
     */
    public SearchSourceBuilder scriptField(String name, Script script, boolean ignoreFailure) {
        if (scriptFields == null) {
            scriptFields = new ArrayList<>();
        }
        scriptFields.add(new ScriptField(name, script, ignoreFailure));
        return this;
    }

    /**
     * Gets the script fields.
     */
    public List scriptFields() {
        return scriptFields;
    }

    /**
     * Sets the boost a specific index or alias will receive when the query is executed
     * against it.
     *
     * @param index
     *            The index or alias to apply the boost against
     * @param indexBoost
     *            The boost to apply to the index
     */
    public SearchSourceBuilder indexBoost(String index, float indexBoost) {
        Objects.requireNonNull(index, "index must not be null");
        this.indexBoosts.add(new IndexBoost(index, indexBoost));
        return this;
    }

    /**
     * Gets the boost a specific indices or aliases will receive when the query is
     * executed against them.
     */
    public List indexBoosts() {
        return indexBoosts;
    }

    /**
     * The stats groups this request will be aggregated under.
     */
    public SearchSourceBuilder stats(List statsGroups) {
        this.stats = statsGroups;
        return this;
    }

    /**
     * The stats groups this request will be aggregated under.
     */
    public List stats() {
        return stats;
    }

    public SearchSourceBuilder ext(List searchExtBuilders) {
        this.extBuilders = Objects.requireNonNull(searchExtBuilders, "searchExtBuilders must not be null");
        return this;
    }

    public List ext() {
        return extBuilders;
    }

    /**
     * @return true if the source only has suggest
     */
    public boolean isSuggestOnly() {
        return suggestBuilder != null
            && queryBuilder == null && aggregations == null;
    }

    /**
     * Rewrites this search source builder into its primitive form. e.g. by
     * rewriting the QueryBuilder. If the builder did not change the identity
     * reference must be returned otherwise the builder will be rewritten
     * infinitely.
     */
    @Override
    public SearchSourceBuilder rewrite(QueryRewriteContext context) throws IOException {
        assert (this.equals(shallowCopy(queryBuilder, postQueryBuilder, aggregations, sliceBuilder, sorts, rescoreBuilders,
            highlightBuilder)));
        QueryBuilder queryBuilder = null;
        if (this.queryBuilder != null) {
            queryBuilder = this.queryBuilder.rewrite(context);
        }
        QueryBuilder postQueryBuilder = null;
        if (this.postQueryBuilder != null) {
            postQueryBuilder = this.postQueryBuilder.rewrite(context);
        }
        AggregatorFactories.Builder aggregations = null;
        if (this.aggregations != null) {
            aggregations = this.aggregations.rewrite(context);
        }
        List> sorts = Rewriteable.rewrite(this.sorts, context);

        List rescoreBuilders = Rewriteable.rewrite(this.rescoreBuilders, context);
        HighlightBuilder highlightBuilder = this.highlightBuilder;
        if (highlightBuilder != null) {
            highlightBuilder = this.highlightBuilder.rewrite(context);
        }

        boolean rewritten = queryBuilder != this.queryBuilder || postQueryBuilder != this.postQueryBuilder
                || aggregations != this.aggregations || rescoreBuilders != this.rescoreBuilders || sorts != this.sorts ||
                this.highlightBuilder != highlightBuilder;
        if (rewritten) {
            return shallowCopy(queryBuilder, postQueryBuilder, aggregations, this.sliceBuilder, sorts, rescoreBuilders, highlightBuilder);
        }
        return this;
    }

    /**
     * Create a shallow copy of this builder with a new slice configuration.
     */
    public SearchSourceBuilder copyWithNewSlice(SliceBuilder slice) {
        return shallowCopy(queryBuilder, postQueryBuilder, aggregations, slice, sorts, rescoreBuilders, highlightBuilder);
    }

    /**
     * Create a shallow copy of this source replaced {@link #queryBuilder}, {@link #postQueryBuilder}, and {@link #sliceBuilder}. Used by
     * {@link #rewrite(QueryRewriteContext)} and {@link #copyWithNewSlice(SliceBuilder)}.
     */
    private SearchSourceBuilder shallowCopy(QueryBuilder queryBuilder, QueryBuilder postQueryBuilder,
                                            AggregatorFactories.Builder aggregations, SliceBuilder slice, List> sorts,
                                            List rescoreBuilders, HighlightBuilder highlightBuilder) {
        SearchSourceBuilder rewrittenBuilder = new SearchSourceBuilder();
        rewrittenBuilder.aggregations = aggregations;
        rewrittenBuilder.explain = explain;
        rewrittenBuilder.extBuilders = extBuilders;
        rewrittenBuilder.fetchSourceContext = fetchSourceContext;
        rewrittenBuilder.docValueFields = docValueFields;
        rewrittenBuilder.storedFieldsContext = storedFieldsContext;
        rewrittenBuilder.from = from;
        rewrittenBuilder.highlightBuilder = highlightBuilder;
        rewrittenBuilder.indexBoosts = indexBoosts;
        rewrittenBuilder.minScore = minScore;
        rewrittenBuilder.postQueryBuilder = postQueryBuilder;
        rewrittenBuilder.profile = profile;
        rewrittenBuilder.queryBuilder = queryBuilder;
        rewrittenBuilder.rescoreBuilders = rescoreBuilders;
        rewrittenBuilder.scriptFields = scriptFields;
        rewrittenBuilder.searchAfterBuilder = searchAfterBuilder;
        rewrittenBuilder.sliceBuilder = slice;
        rewrittenBuilder.size = size;
        rewrittenBuilder.sorts = sorts;
        rewrittenBuilder.stats = stats;
        rewrittenBuilder.suggestBuilder = suggestBuilder;
        rewrittenBuilder.terminateAfter = terminateAfter;
        rewrittenBuilder.timeout = timeout;
        rewrittenBuilder.trackScores = trackScores;
        rewrittenBuilder.trackTotalHitsUpTo = trackTotalHitsUpTo;
        rewrittenBuilder.version = version;
        rewrittenBuilder.seqNoAndPrimaryTerm = seqNoAndPrimaryTerm;
        rewrittenBuilder.collapse = collapse;
        return rewrittenBuilder;
    }

    public void parseXContent(XContentParser parser) throws IOException {
        parseXContent(parser, true);
    }

    /**
     * Parse some xContent into this SearchSourceBuilder, overwriting any values specified in the xContent. Use this if you need to set up
     * different defaults than a regular SearchSourceBuilder would have and use {@link #fromXContent(XContentParser, boolean)} if you have
     * normal defaults.
     *
     * @param parser The xContent parser.
     * @param checkTrailingTokens If true throws a parsing exception when extra tokens are found after the main object.
     */
    public void parseXContent(XContentParser parser, boolean checkTrailingTokens) throws IOException {
        XContentParser.Token token = parser.currentToken();
        String currentFieldName = null;
        if (token != XContentParser.Token.START_OBJECT && (token = parser.nextToken()) != XContentParser.Token.START_OBJECT) {
            throw new ParsingException(parser.getTokenLocation(), "Expected [" + XContentParser.Token.START_OBJECT +
                    "] but found [" + token + "]", parser.getTokenLocation());
        }
        while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
            if (token == XContentParser.Token.FIELD_NAME) {
                currentFieldName = parser.currentName();
            } else if (token.isValue()) {
                if (FROM_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    from = parser.intValue();
                } else if (SIZE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    size = parser.intValue();
                } else if (TIMEOUT_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    timeout = TimeValue.parseTimeValue(parser.text(), null, TIMEOUT_FIELD.getPreferredName());
                } else if (TERMINATE_AFTER_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    terminateAfter = parser.intValue();
                } else if (MIN_SCORE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    minScore = parser.floatValue();
                } else if (VERSION_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    version = parser.booleanValue();
                } else if (SEQ_NO_PRIMARY_TERM_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    seqNoAndPrimaryTerm = parser.booleanValue();
                } else if (EXPLAIN_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    explain = parser.booleanValue();
                } else if (TRACK_SCORES_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    trackScores = parser.booleanValue();
                } else if (TRACK_TOTAL_HITS_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    if (token == XContentParser.Token.VALUE_BOOLEAN ||
                        (token == XContentParser.Token.VALUE_STRING && Booleans.isBoolean(parser.text()))) {
                        trackTotalHitsUpTo = parser.booleanValue() ? TRACK_TOTAL_HITS_ACCURATE : TRACK_TOTAL_HITS_DISABLED;
                    } else {
                        trackTotalHitsUpTo = parser.intValue();
                    }
                } else if (_SOURCE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    fetchSourceContext = FetchSourceContext.fromXContent(parser);
                } else if (STORED_FIELDS_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    storedFieldsContext =
                        StoredFieldsContext.fromXContent(SearchSourceBuilder.STORED_FIELDS_FIELD.getPreferredName(), parser);
                } else if (SORT_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    sort(parser.text());
                } else if (PROFILE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    profile = parser.booleanValue();
                } else {
                    throw new ParsingException(parser.getTokenLocation(), "Unknown key for a " + token + " in [" + currentFieldName + "].",
                            parser.getTokenLocation());
                }
            } else if (token == XContentParser.Token.START_OBJECT) {
                if (QUERY_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    queryBuilder = parseInnerQueryBuilder(parser);
                } else if (POST_FILTER_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    postQueryBuilder = parseInnerQueryBuilder(parser);
                } else if (_SOURCE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    fetchSourceContext = FetchSourceContext.fromXContent(parser);
                } else if (SCRIPT_FIELDS_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    scriptFields = new ArrayList<>();
                    while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
                        scriptFields.add(new ScriptField(parser));
                    }
                } else if (INDICES_BOOST_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    deprecationLogger.deprecated(
                        "Object format in indices_boost is deprecated, please use array format instead");
                    while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
                        if (token == XContentParser.Token.FIELD_NAME) {
                            currentFieldName = parser.currentName();
                        } else if (token.isValue()) {
                            indexBoosts.add(new IndexBoost(currentFieldName, parser.floatValue()));
                        } else {
                            throw new ParsingException(parser.getTokenLocation(), "Unknown key for a " + token +
                                " in [" + currentFieldName + "].", parser.getTokenLocation());
                        }
                    }
                } else if (AGGREGATIONS_FIELD.match(currentFieldName, parser.getDeprecationHandler())
                        || AGGS_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    aggregations = AggregatorFactories.parseAggregators(parser);
                } else if (HIGHLIGHT_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    highlightBuilder = HighlightBuilder.fromXContent(parser);
                } else if (SUGGEST_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    suggestBuilder = SuggestBuilder.fromXContent(parser);
                } else if (SORT_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    sorts = new ArrayList<>(SortBuilder.fromXContent(parser));
                } else if (RESCORE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    rescoreBuilders = new ArrayList<>();
                    rescoreBuilders.add(RescorerBuilder.parseFromXContent(parser));
                } else if (EXT_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    extBuilders = new ArrayList<>();
                    String extSectionName = null;
                    while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
                        if (token == XContentParser.Token.FIELD_NAME) {
                            extSectionName = parser.currentName();
                        } else {
                            SearchExtBuilder searchExtBuilder = parser.namedObject(SearchExtBuilder.class, extSectionName, null);
                            if (searchExtBuilder.getWriteableName().equals(extSectionName) == false) {
                                throw new IllegalStateException("The parsed [" + searchExtBuilder.getClass().getName() + "] object has a "
                                        + "different writeable name compared to the name of the section that it was parsed from: found ["
                                        + searchExtBuilder.getWriteableName() + "] expected [" + extSectionName + "]");
                            }
                            extBuilders.add(searchExtBuilder);
                        }
                    }
                } else if (SLICE.match(currentFieldName, parser.getDeprecationHandler())) {
                    sliceBuilder = SliceBuilder.fromXContent(parser);
                } else if (COLLAPSE.match(currentFieldName, parser.getDeprecationHandler())) {
                    collapse = CollapseBuilder.fromXContent(parser);
                } else {
                    throw new ParsingException(parser.getTokenLocation(), "Unknown key for a " + token + " in [" + currentFieldName + "].",
                            parser.getTokenLocation());
                }
            } else if (token == XContentParser.Token.START_ARRAY) {
                if (STORED_FIELDS_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    storedFieldsContext = StoredFieldsContext.fromXContent(STORED_FIELDS_FIELD.getPreferredName(), parser);
                } else if (DOCVALUE_FIELDS_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    docValueFields = new ArrayList<>();
                    while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
                        docValueFields.add(FieldAndFormat.fromXContent(parser));
                    }
                } else if (INDICES_BOOST_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
                        indexBoosts.add(new IndexBoost(parser));
                    }
                } else if (SORT_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    sorts = new ArrayList<>(SortBuilder.fromXContent(parser));
                } else if (RESCORE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    rescoreBuilders = new ArrayList<>();
                    while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
                        rescoreBuilders.add(RescorerBuilder.parseFromXContent(parser));
                    }
                } else if (STATS_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    stats = new ArrayList<>();
                    while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
                        if (token == XContentParser.Token.VALUE_STRING) {
                            stats.add(parser.text());
                        } else {
                            throw new ParsingException(parser.getTokenLocation(), "Expected [" + XContentParser.Token.VALUE_STRING +
                                    "] in [" + currentFieldName + "] but found [" + token + "]", parser.getTokenLocation());
                        }
                    }
                } else if (_SOURCE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                    fetchSourceContext = FetchSourceContext.fromXContent(parser);
                } else if (SEARCH_AFTER.match(currentFieldName, parser.getDeprecationHandler())) {
                    searchAfterBuilder = SearchAfterBuilder.fromXContent(parser);
                } else {
                    throw new ParsingException(parser.getTokenLocation(), "Unknown key for a " + token + " in [" + currentFieldName + "].",
                            parser.getTokenLocation());
                }
            } else {
                throw new ParsingException(parser.getTokenLocation(), "Unknown key for a " + token + " in [" + currentFieldName + "].",
                        parser.getTokenLocation());
            }
        }
        if (checkTrailingTokens) {
            token = parser.nextToken();
            if (token != null) {
                throw new ParsingException(parser.getTokenLocation(), "Unexpected token [" + token + "] found after the main object.");
            }
        }
    }

    public XContentBuilder innerToXContent(XContentBuilder builder, Params params) throws IOException {
        if (from != -1) {
            builder.field(FROM_FIELD.getPreferredName(), from);
        }
        if (size != -1) {
            builder.field(SIZE_FIELD.getPreferredName(), size);
        }

        if (timeout != null && !timeout.equals(TimeValue.MINUS_ONE)) {
            builder.field(TIMEOUT_FIELD.getPreferredName(), timeout.getStringRep());
        }

        if (terminateAfter != SearchContext.DEFAULT_TERMINATE_AFTER) {
            builder.field(TERMINATE_AFTER_FIELD.getPreferredName(), terminateAfter);
        }

        if (queryBuilder != null) {
            builder.field(QUERY_FIELD.getPreferredName(), queryBuilder);
        }

        if (postQueryBuilder != null) {
            builder.field(POST_FILTER_FIELD.getPreferredName(), postQueryBuilder);
        }

        if (minScore != null) {
            builder.field(MIN_SCORE_FIELD.getPreferredName(), minScore);
        }

        if (version != null) {
            builder.field(VERSION_FIELD.getPreferredName(), version);
        }

        if (seqNoAndPrimaryTerm != null) {
            builder.field(SEQ_NO_PRIMARY_TERM_FIELD.getPreferredName(), seqNoAndPrimaryTerm);
        }

        if (explain != null) {
            builder.field(EXPLAIN_FIELD.getPreferredName(), explain);
        }

        if (profile) {
            builder.field("profile", true);
        }

        if (fetchSourceContext != null) {
            builder.field(_SOURCE_FIELD.getPreferredName(), fetchSourceContext);
        }

        if (storedFieldsContext != null) {
            storedFieldsContext.toXContent(STORED_FIELDS_FIELD.getPreferredName(), builder);
        }

        if (docValueFields != null) {
            builder.startArray(DOCVALUE_FIELDS_FIELD.getPreferredName());
            for (FieldAndFormat docValueField : docValueFields) {
                builder.startObject()
                    .field("field", docValueField.field);
                if (docValueField.format != null) {
                    builder.field("format", docValueField.format);
                }
                builder.endObject();
            }
            builder.endArray();
        }

        if (scriptFields != null) {
            builder.startObject(SCRIPT_FIELDS_FIELD.getPreferredName());
            for (ScriptField scriptField : scriptFields) {
                scriptField.toXContent(builder, params);
            }
            builder.endObject();
        }

        if (sorts != null) {
            builder.startArray(SORT_FIELD.getPreferredName());
            for (SortBuilder sort : sorts) {
                sort.toXContent(builder, params);
            }
            builder.endArray();
        }

        if (trackScores) {
            builder.field(TRACK_SCORES_FIELD.getPreferredName(), true);
        }

        if (trackTotalHitsUpTo != null) {
            builder.field(TRACK_TOTAL_HITS_FIELD.getPreferredName(), trackTotalHitsUpTo);
        }

        if (searchAfterBuilder != null) {
            builder.array(SEARCH_AFTER.getPreferredName(), searchAfterBuilder.getSortValues());
        }

        if (sliceBuilder != null) {
            builder.field(SLICE.getPreferredName(), sliceBuilder);
        }

        if (!indexBoosts.isEmpty()) {
            builder.startArray(INDICES_BOOST_FIELD.getPreferredName());
            for (IndexBoost ib : indexBoosts) {
                builder.startObject();
                builder.field(ib.index, ib.boost);
                builder.endObject();
            }
            builder.endArray();
        }

        if (aggregations != null) {
            builder.field(AGGREGATIONS_FIELD.getPreferredName(), aggregations);
        }

        if (highlightBuilder != null) {
            builder.field(HIGHLIGHT_FIELD.getPreferredName(), highlightBuilder);
        }

        if (suggestBuilder != null) {
            builder.field(SUGGEST_FIELD.getPreferredName(), suggestBuilder);
        }

        if (rescoreBuilders != null) {
            builder.startArray(RESCORE_FIELD.getPreferredName());
            for (RescorerBuilder rescoreBuilder : rescoreBuilders) {
                rescoreBuilder.toXContent(builder, params);
            }
            builder.endArray();
        }

        if (stats != null) {
            builder.field(STATS_FIELD.getPreferredName(), stats);
        }

        if (extBuilders != null && extBuilders.isEmpty() == false) {
            builder.startObject(EXT_FIELD.getPreferredName());
            for (SearchExtBuilder extBuilder : extBuilders) {
                extBuilder.toXContent(builder, params);
            }
            builder.endObject();
        }

        if (collapse != null) {
            builder.field(COLLAPSE.getPreferredName(), collapse);
        }
        return builder;
    }

    @Override
    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
        builder.startObject();
        innerToXContent(builder, params);
        builder.endObject();
        return builder;
    }

    public static class IndexBoost implements Writeable, ToXContentObject {
        private final String index;
        private final float boost;

        IndexBoost(String index, float boost) {
            this.index = index;
            this.boost = boost;
        }

        IndexBoost(StreamInput in) throws IOException {
            index = in.readString();
            boost = in.readFloat();
        }

        IndexBoost(XContentParser parser) throws IOException {
            XContentParser.Token token = parser.currentToken();

            if (token == XContentParser.Token.START_OBJECT) {
                token = parser.nextToken();
                if (token == XContentParser.Token.FIELD_NAME) {
                    index = parser.currentName();
                } else {
                    throw new ParsingException(parser.getTokenLocation(), "Expected [" + XContentParser.Token.FIELD_NAME +
                        "] in [" + INDICES_BOOST_FIELD + "] but found [" + token + "]", parser.getTokenLocation());
                }
                token = parser.nextToken();
                if (token == XContentParser.Token.VALUE_NUMBER) {
                    boost = parser.floatValue();
                } else {
                    throw new ParsingException(parser.getTokenLocation(), "Expected [" + XContentParser.Token.VALUE_NUMBER +
                        "] in [" + INDICES_BOOST_FIELD + "] but found [" + token + "]", parser.getTokenLocation());
                }
                token = parser.nextToken();
                if (token != XContentParser.Token.END_OBJECT) {
                    throw new ParsingException(parser.getTokenLocation(), "Expected [" + XContentParser.Token.END_OBJECT +
                        "] in [" + INDICES_BOOST_FIELD + "] but found [" + token + "]", parser.getTokenLocation());
                }
            } else {
                throw new ParsingException(parser.getTokenLocation(), "Expected [" + XContentParser.Token.START_OBJECT +
                    "] in [" + parser.currentName() + "] but found [" + token + "]", parser.getTokenLocation());
            }
        }

        public String getIndex() {
            return index;
        }

        public float getBoost() {
            return boost;
        }

        @Override
        public void writeTo(StreamOutput out) throws IOException {
            out.writeString(index);
            out.writeFloat(boost);
        }

        @Override
        public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
            builder.startObject();
            builder.field(index, boost);
            builder.endObject();
            return builder;
        }

        @Override
        public int hashCode() {
            return Objects.hash(index, boost);
        }

        @Override
        public boolean equals(Object obj) {
            if (obj == null) {
                return false;
            }
            if (getClass() != obj.getClass()) {
                return false;
            }
            IndexBoost other = (IndexBoost) obj;
            return Objects.equals(index, other.index)
                && Objects.equals(boost, other.boost);
        }

    }

    public static class ScriptField implements Writeable, ToXContentFragment {

        private final boolean ignoreFailure;
        private final String fieldName;
        private final Script script;

        public ScriptField(String fieldName, Script script, boolean ignoreFailure) {
            this.fieldName = fieldName;
            this.script = script;
            this.ignoreFailure = ignoreFailure;
        }

        /**
         * Read from a stream.
         */
        public ScriptField(StreamInput in) throws IOException {
            fieldName = in.readString();
            script = new Script(in);
            ignoreFailure = in.readBoolean();
        }

        @Override
        public void writeTo(StreamOutput out) throws IOException {
            out.writeString(fieldName);
            script.writeTo(out);
            out.writeBoolean(ignoreFailure);
        }

        public ScriptField(XContentParser parser) throws IOException {
            boolean ignoreFailure = false;
            String scriptFieldName = parser.currentName();
            Script script = null;

            XContentParser.Token token;
            token = parser.nextToken();
            if (token == XContentParser.Token.START_OBJECT) {
                String currentFieldName = null;
                while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
                    if (token == XContentParser.Token.FIELD_NAME) {
                        currentFieldName = parser.currentName();
                    } else if (token.isValue()) {
                        if (SCRIPT_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                            script = Script.parse(parser);
                        } else if (IGNORE_FAILURE_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                            ignoreFailure = parser.booleanValue();
                        } else {
                            throw new ParsingException(parser.getTokenLocation(), "Unknown key for a " + token + " in [" + currentFieldName
                                    + "].", parser.getTokenLocation());
                        }
                    } else if (token == XContentParser.Token.START_OBJECT) {
                        if (SCRIPT_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {
                            script = Script.parse(parser);
                        } else {
                            throw new ParsingException(parser.getTokenLocation(), "Unknown key for a " + token + " in [" + currentFieldName
                                    + "].", parser.getTokenLocation());
                        }
                    } else {
                        throw new ParsingException(parser.getTokenLocation(), "Unknown key for a " + token + " in [" + currentFieldName
                                + "].", parser.getTokenLocation());
                    }
                }
                this.ignoreFailure = ignoreFailure;
                this.fieldName = scriptFieldName;
                this.script = script;
            } else {
                throw new ParsingException(parser.getTokenLocation(), "Expected [" + XContentParser.Token.START_OBJECT + "] in ["
                        + parser.currentName() + "] but found [" + token + "]", parser.getTokenLocation());
            }
        }

        public String fieldName() {
            return fieldName;
        }

        public Script script() {
            return script;
        }

        public boolean ignoreFailure() {
            return ignoreFailure;
        }

        @Override
        public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
            builder.startObject(fieldName);
            builder.field(SCRIPT_FIELD.getPreferredName(), script);
            builder.field(IGNORE_FAILURE_FIELD.getPreferredName(), ignoreFailure);
            builder.endObject();
            return builder;
        }

        @Override
        public int hashCode() {
            return Objects.hash(fieldName, script, ignoreFailure);
        }

        @Override
        public boolean equals(Object obj) {
            if (obj == null) {
                return false;
            }
            if (getClass() != obj.getClass()) {
                return false;
            }
            ScriptField other = (ScriptField) obj;
            return Objects.equals(fieldName, other.fieldName)
                    && Objects.equals(script, other.script)
                    && Objects.equals(ignoreFailure, other.ignoreFailure);
        }
    }

    @Override
    public int hashCode() {
        return Objects.hash(aggregations, explain, fetchSourceContext, docValueFields, storedFieldsContext, from, highlightBuilder,
                indexBoosts, minScore, postQueryBuilder, queryBuilder, rescoreBuilders, scriptFields, size,
                sorts, searchAfterBuilder, sliceBuilder, stats, suggestBuilder, terminateAfter, timeout, trackScores, version,
                seqNoAndPrimaryTerm, profile, extBuilders, collapse, trackTotalHitsUpTo);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (obj.getClass() != getClass()) {
            return false;
        }
        SearchSourceBuilder other = (SearchSourceBuilder) obj;
        return Objects.equals(aggregations, other.aggregations)
                && Objects.equals(explain, other.explain)
                && Objects.equals(fetchSourceContext, other.fetchSourceContext)
                && Objects.equals(docValueFields, other.docValueFields)
                && Objects.equals(storedFieldsContext, other.storedFieldsContext)
                && Objects.equals(from, other.from)
                && Objects.equals(highlightBuilder, other.highlightBuilder)
                && Objects.equals(indexBoosts, other.indexBoosts)
                && Objects.equals(minScore, other.minScore)
                && Objects.equals(postQueryBuilder, other.postQueryBuilder)
                && Objects.equals(queryBuilder, other.queryBuilder)
                && Objects.equals(rescoreBuilders, other.rescoreBuilders)
                && Objects.equals(scriptFields, other.scriptFields)
                && Objects.equals(size, other.size)
                && Objects.equals(sorts, other.sorts)
                && Objects.equals(searchAfterBuilder, other.searchAfterBuilder)
                && Objects.equals(sliceBuilder, other.sliceBuilder)
                && Objects.equals(stats, other.stats)
                && Objects.equals(suggestBuilder, other.suggestBuilder)
                && Objects.equals(terminateAfter, other.terminateAfter)
                && Objects.equals(timeout, other.timeout)
                && Objects.equals(trackScores, other.trackScores)
                && Objects.equals(version, other.version)
                && Objects.equals(seqNoAndPrimaryTerm, other.seqNoAndPrimaryTerm)
                && Objects.equals(profile, other.profile)
                && Objects.equals(extBuilders, other.extBuilders)
                && Objects.equals(collapse, other.collapse)
                && Objects.equals(trackTotalHitsUpTo, other.trackTotalHitsUpTo);
    }

    @Override
    public String toString() {
        return toString(EMPTY_PARAMS);
    }

    public String toString(Params params) {
        try {
            return XContentHelper.toXContent(this, XContentType.JSON, params, true).utf8ToString();
        } catch (IOException e) {
            throw new ElasticsearchException(e);
        }
    }
}




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