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comparison src/goodjava/queryparser/MultiFieldParser.java @ 1402:27efb1fcbcb5

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move luan.lib to goodjava
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 17 Sep 2019 01:35:01 -0400
parents src/luan/lib/queryparser/MultiFieldParser.java@dc2af9d5463b
children
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1401:ef1620aa99cb 1402:27efb1fcbcb5
1 package goodjava.queryparser;
2
3 import java.util.Map;
4 import java.util.HashMap;
5 import org.apache.lucene.search.Query;
6 import org.apache.lucene.search.BooleanQuery;
7 import org.apache.lucene.search.BooleanClause;
8 import org.apache.lucene.search.SortField;
9 import goodjava.parser.ParseException;
10
11
12 public class MultiFieldParser implements FieldParser {
13
14 /**
15 * maps field name to FieldParser
16 */
17 public final Map<String,FieldParser> fields = new HashMap<String,FieldParser>();
18 public boolean allowUnspecifiedFields = false;
19 private final FieldParser defaultFieldParser;
20 private final String[] defaultFields;
21
22 public MultiFieldParser() {
23 this.defaultFieldParser = null;
24 this.defaultFields = null;
25 }
26
27 public MultiFieldParser(FieldParser defaultFieldParser,String... defaultFields) {
28 this.defaultFieldParser = defaultFieldParser;
29 this.defaultFields = defaultFields;
30 for( String field : defaultFields ) {
31 fields.put(field,defaultFieldParser);
32 }
33 }
34
35 @Override public Query getQuery(SaneQueryParser qp,String field,String query) throws ParseException {
36 if( field == null ) {
37 if( defaultFieldParser == null )
38 throw qp.exception("no defaults were specified, so a field is required");
39 if( defaultFields.length == 1 )
40 return defaultFieldParser.getQuery(qp,defaultFields[0],query);
41 BooleanQuery bq = new BooleanQuery();
42 for( String f : defaultFields ) {
43 bq.add( defaultFieldParser.getQuery(qp,f,query), BooleanClause.Occur.SHOULD );
44 }
45 return bq;
46 } else {
47 FieldParser fp = fields.get(field);
48 if( fp != null )
49 return fp.getQuery(qp,field,query);
50 if( allowUnspecifiedFields )
51 return defaultFieldParser.getQuery(qp,field,query);
52 throw qp.exception("unrecognized field '"+field+"'");
53 }
54 }
55
56 @Override public Query getRangeQuery(SaneQueryParser qp,String field,String minQuery,String maxQuery,boolean includeMin,boolean includeMax) throws ParseException {
57 if( field == null ) {
58 if( defaultFieldParser == null )
59 throw qp.exception("no defaults were specified, so a field is required");
60 if( defaultFields.length == 1 )
61 return defaultFieldParser.getRangeQuery(qp,defaultFields[0],minQuery,maxQuery,includeMin,includeMax);
62 BooleanQuery bq = new BooleanQuery();
63 for( String f : defaultFields ) {
64 bq.add( defaultFieldParser.getRangeQuery(qp,f,minQuery,maxQuery,includeMin,includeMax), BooleanClause.Occur.SHOULD );
65 }
66 return bq;
67 } else {
68 FieldParser fp = fields.get(field);
69 if( fp != null )
70 return fp.getRangeQuery(qp,field,minQuery,maxQuery,includeMin,includeMax);
71 if( allowUnspecifiedFields )
72 return defaultFieldParser.getRangeQuery(qp,field,minQuery,maxQuery,includeMin,includeMax);
73 throw qp.exception("field '"+field+"' not specified");
74 }
75 }
76
77 @Override public SortField getSortField(SaneQueryParser qp,String field,boolean reverse) throws ParseException {
78 FieldParser fp = fields.get(field);
79 if( fp != null )
80 return fp.getSortField(qp,field,reverse);
81 if( allowUnspecifiedFields )
82 return defaultFieldParser.getSortField(qp,field,reverse);
83 throw qp.exception("field '"+field+"' not specified");
84 }
85
86 }