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    • org.nlpcn.es4sql.domain.hints.HintFactory Maven / Gradle / Ivy

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    package org.nlpcn.es4sql.domain.hints;


import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
import com.fasterxml.jackson.dataformat.yaml.YAMLParser;
import org.elasticsearch.common.xcontent.yaml.YamlXContentParser;
import org.nlpcn.es4sql.exception.SqlParseException;

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

/**
 * Created by Eliran on 5/9/2015.
 */
public class HintFactory {

    public static Hint getHintFromString(String hintAsString) throws SqlParseException {
        if(hintAsString.startsWith("! USE_NESTED_LOOPS") || hintAsString.startsWith("! USE_NL")){
            return new Hint(HintType.USE_NESTED_LOOPS,null);
        }

        if(hintAsString.startsWith("! SHARD_SIZE")){
            String[] numbers =  getParamsFromHint(hintAsString, "! SHARD_SIZE");
            //todo: check if numbers etc..
            List params = new ArrayList<>();
            for (String number : numbers){
                if(number.equals("null") || number.equals("infinity")){
                    params.add(null);
                }
                else {
                    params.add(Integer.parseInt(number));
                }
            }
            return new Hint(HintType.SHARD_SIZE,params.toArray());
        }

        if(hintAsString.equals("! HASH_WITH_TERMS_FILTER"))
            return new Hint(HintType.HASH_WITH_TERMS_FILTER,null);
        if(hintAsString.startsWith("! JOIN_TABLES_LIMIT")){
            String[] numbers =  getParamsFromHint(hintAsString, "! JOIN_TABLES_LIMIT");
            //todo: check if numbers etc..
            List params = new ArrayList<>();
            for (String number : numbers){
                if(number.equals("null") || number.equals("infinity")){
                    params.add(null);
                }
                else {
                    params.add(Integer.parseInt(number));
                }
            }

            return new Hint(HintType.JOIN_LIMIT,params.toArray());
        }
        if(hintAsString.startsWith("! NL_MULTISEARCH_SIZE")) {
            String[] number = getParamsFromHint(hintAsString,"! NL_MULTISEARCH_SIZE");
            //todo: check if numbers etc..
            int multiSearchSize = Integer.parseInt(number[0]);
            return new Hint(HintType.NL_MULTISEARCH_SIZE,new Object[]{multiSearchSize});
        }
        if(hintAsString.startsWith("! USE_SCROLL")){
            String[] scrollParams = getParamsFromHint(hintAsString,"! USE_SCROLL");
            int docsPerShardFetch = 50;
            int timeout = 60000;
            if(scrollParams != null && scrollParams.length ==2) {
                docsPerShardFetch = Integer.parseInt(scrollParams[0]);
                timeout = Integer.parseInt(scrollParams[1]);
            }
            return new Hint(HintType.USE_SCROLL, new Object[]{docsPerShardFetch,timeout});
        }
        if(hintAsString.startsWith("! IGNORE_UNAVAILABLE")){
            return new Hint(HintType.IGNORE_UNAVAILABLE,null);
        }
        if(hintAsString.startsWith("! DOCS_WITH_AGGREGATION")) {
            Integer[] params = parseParamsAsInts(hintAsString,"! DOCS_WITH_AGGREGATION");
            return new Hint(HintType.DOCS_WITH_AGGREGATION, params);
        }
        if(hintAsString.startsWith("! ROUTINGS")) {
            String[] routings = getParamsFromHint(hintAsString,"! ROUTINGS");
            return new Hint(HintType.ROUTINGS,routings);
        }
        if(hintAsString.startsWith("! HIGHLIGHT")) {
            String[] heighlights = getParamsFromHint(hintAsString,"! HIGHLIGHT");
            ArrayList hintParams = new ArrayList();
            hintParams.add(heighlights[0]);
            if(heighlights.length > 1 ){
                StringBuilder builder = new StringBuilder();
                for(int i=1;i map = yamlXContentParser.map();
                hintParams.add(map);
                } catch (IOException e) {
                    throw new SqlParseException("could not parse heighlight hint: " + e.getMessage());
                }
            }
            return new Hint(HintType.HIGHLIGHT,hintParams.toArray());
        }
        if(hintAsString.startsWith("! MINUS_SCROLL_FETCH_AND_RESULT_LIMITS")){
            Integer[] params = parseParamsAsInts(hintAsString,"! MINUS_SCROLL_FETCH_AND_RESULT_LIMITS");
            if( params.length>3){
                throw new SqlParseException("MINUS_FETCH_AND_RESULT_LIMITS should have 3 int params (maxFromFirst,maxFromSecond,hitsPerScrollShard)");
            }
            Integer[] paramsWithDefaults = new Integer[3];
            int defaultMaxFetchFromTable = 100000;
            int defaultFetchOnScroll = 1000;
            paramsWithDefaults[0] = defaultMaxFetchFromTable;
            paramsWithDefaults[1] = defaultMaxFetchFromTable;
            paramsWithDefaults[2] = defaultFetchOnScroll;
            for(int i=0;i    
    
    
    

    




    
    
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