import org.elasticsearch.index.query.QueryParser; //导入依赖的package包/类
@Inject
public IndicesQueriesRegistry(Settings settings, Set<QueryParser> injectedQueryParsers) {
    super(settings);
    Map<String, QueryParser> queryParsers = Maps.newHashMap();
    for (QueryParser queryParser : injectedQueryParsers) {
        for (String name : queryParser.names()) {
            queryParsers.put(name, queryParser);
        }
    }
    this.queryParsers = ImmutableMap.copyOf(queryParsers);
}
 

import org.elasticsearch.index.query.QueryParser; //导入依赖的package包/类
/**
 * Returns all the registered query parsers
 */
public ImmutableMap<String, QueryParser> queryParsers() {
    return queryParsers;
}
 

import org.elasticsearch.index.query.QueryParser; //导入依赖的package包/类
/**
 * Specification of custom {@link Query}.
 *
 * @param name holds the names by which this query might be parsed. The {@link ParseField#getPreferredName()} is special as it
 *        is the name by under which the reader is registered. So it is the name that the query should use as its
 *        {@link NamedWriteable#getWriteableName()} too.
 * @param reader the reader registered for this query's builder. Typically a reference to a constructor that takes a
 *        {@link StreamInput}
 * @param parser the parser the reads the query builder from xcontent
 */
public QuerySpec(ParseField name, Writeable.Reader<T> reader, QueryParser<T> parser) {
    super(name, reader, parser);
}