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annotate src/goodjava/lucene/queryparser/MultiFieldParser.java @ 1801:32e77b071e09

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author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 12 Mar 2024 09:28:39 -0600
parents c6b50b7b958c
children
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6b6c11c9164e goodjava.lucene
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1 package goodjava.lucene.queryparser;
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2
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3 import java.util.Map;
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4 import java.util.HashMap;
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5 import org.apache.lucene.search.Query;
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6 import org.apache.lucene.search.BooleanQuery;
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7 import org.apache.lucene.search.BooleanClause;
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8 import org.apache.lucene.search.SortField;
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9 import goodjava.parser.ParseException;
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11
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12 public class MultiFieldParser implements FieldParser {
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13
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14 /**
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15 * maps field name to FieldParser
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16 */
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17 public final Map<String,FieldParser> fields = new HashMap<String,FieldParser>();
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18 public boolean allowUnspecifiedFields = false;
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19 private final FieldParser defaultFieldParser;
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20 private final String[] defaultFields;
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21
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22 public MultiFieldParser() {
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23 this.defaultFieldParser = null;
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24 this.defaultFields = null;
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25 }
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26
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27 public MultiFieldParser(FieldParser defaultFieldParser,String... defaultFields) {
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28 this.defaultFieldParser = defaultFieldParser;
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29 this.defaultFields = defaultFields;
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30 for( String field : defaultFields ) {
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31 fields.put(field,defaultFieldParser);
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32 }
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33 }
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34
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35 @Override public Query getQuery(GoodQueryParser qp,String field,String query) throws ParseException {
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36 if( field == null ) {
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37 if( defaultFieldParser == null )
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38 throw qp.exception("no defaults were specified, so a field is required");
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39 if( defaultFields.length == 1 )
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40 return defaultFieldParser.getQuery(qp,defaultFields[0],query);
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41 BooleanQuery bq = new BooleanQuery();
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42 for( String f : defaultFields ) {
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43 bq.add( defaultFieldParser.getQuery(qp,f,query), BooleanClause.Occur.SHOULD );
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44 }
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45 return bq;
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46 } else {
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47 FieldParser fp = fields.get(field);
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48 if( fp != null )
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49 return fp.getQuery(qp,field,query);
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50 if( allowUnspecifiedFields )
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51 return defaultFieldParser.getQuery(qp,field,query);
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52 throw qp.exception("undefined query field '"+field+"'");
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53 }
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54 }
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55
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56 @Override public Query getRangeQuery(GoodQueryParser qp,String field,String minQuery,String maxQuery,boolean includeMin,boolean includeMax) throws ParseException {
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57 if( field == null ) {
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58 if( defaultFieldParser == null )
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59 throw qp.exception("no defaults were specified, so a field is required");
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60 if( defaultFields.length == 1 )
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61 return defaultFieldParser.getRangeQuery(qp,defaultFields[0],minQuery,maxQuery,includeMin,includeMax);
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62 BooleanQuery bq = new BooleanQuery();
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63 for( String f : defaultFields ) {
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64 bq.add( defaultFieldParser.getRangeQuery(qp,f,minQuery,maxQuery,includeMin,includeMax), BooleanClause.Occur.SHOULD );
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65 }
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66 return bq;
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67 } else {
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68 FieldParser fp = fields.get(field);
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69 if( fp != null )
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70 return fp.getRangeQuery(qp,field,minQuery,maxQuery,includeMin,includeMax);
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71 if( allowUnspecifiedFields )
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72 return defaultFieldParser.getRangeQuery(qp,field,minQuery,maxQuery,includeMin,includeMax);
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73 throw qp.exception("field '"+field+"' not specified");
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74 }
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75 }
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76
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77 @Override public SortField getSortField(GoodQueryParser qp,String field,boolean reverse) throws ParseException {
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78 FieldParser fp = fields.get(field);
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79 if( fp != null )
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80 return fp.getSortField(qp,field,reverse);
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81 if( allowUnspecifiedFields )
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82 return defaultFieldParser.getSortField(qp,field,reverse);
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83 throw qp.exception("field '"+field+"' not specified");
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84 }
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85
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86 }