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annotate src/goodjava/lucene/api/LuceneUtils.java @ 1753:83780735ad9c
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| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Sat, 04 Feb 2023 21:26:41 -0700 |
| parents | e5d48b85351c |
| children | c62324841dfb |
| rev | line source |
|---|---|
| 1460 | 1 package goodjava.lucene.api; |
| 2 | |
| 3 import java.util.Map; | |
| 4 import java.util.HashMap; | |
| 5 import java.util.List; | |
| 6 import java.util.ArrayList; | |
| 7 import org.apache.lucene.document.Document; | |
| 8 import org.apache.lucene.index.IndexableField; | |
| 9 import org.apache.lucene.index.Term; | |
| 10 import org.apache.lucene.util.BytesRef; | |
| 11 import org.apache.lucene.util.NumericUtils; | |
| 12 | |
| 13 | |
| 14 public final class LuceneUtils { | |
| 15 private LuceneUtils() {} // never | |
| 16 | |
| 17 public static Object getValue(IndexableField ifld) { | |
| 18 BytesRef br = ifld.binaryValue(); | |
| 19 if( br != null ) | |
| 20 return br.bytes; | |
| 21 Number n = ifld.numericValue(); | |
| 22 if( n != null ) | |
| 23 return n; | |
| 24 String s = ifld.stringValue(); | |
| 25 if( s != null ) | |
| 26 return s; | |
| 27 throw new RuntimeException("invalid field type for "+ifld); | |
| 28 } | |
| 29 | |
| 30 public static Map<String,Object> toMap(Document doc) { | |
| 31 if( doc==null ) | |
| 32 return null; | |
| 33 Map<String,Object> map = new HashMap<String,Object>(); | |
| 34 for( IndexableField ifld : doc ) { | |
| 35 String name = ifld.name(); | |
| 36 Object value = getValue(ifld); | |
| 37 Object old = map.get(name); | |
| 38 if( old == null ) { | |
| 39 map.put(name,value); | |
| 40 } else { | |
| 41 List list; | |
| 42 if( old instanceof List ) { | |
| 43 list = (List)old; | |
| 44 } else { | |
| 45 list = new ArrayList(); | |
| 46 list.add(old); | |
| 47 map.put(name,list); | |
| 48 } | |
| 49 list.add(value); | |
| 50 } | |
| 51 } | |
| 52 return map; | |
| 53 } | |
| 54 | |
| 55 public static Term term(String name,Object value) { | |
| 56 if( value instanceof String ) { | |
| 57 return new Term(name,(String)value); | |
| 58 } else if( value instanceof Long ) { | |
| 59 BytesRef br = new BytesRef(); | |
| 60 NumericUtils.longToPrefixCoded((Long)value,0,br); | |
| 61 return new Term(name,br); | |
|
1461
e5d48b85351c
start lucene.logging
Franklin Schmidt <fschmidt@gmail.com>
parents:
1460
diff
changeset
|
62 } else if( value instanceof Integer ) { |
|
e5d48b85351c
start lucene.logging
Franklin Schmidt <fschmidt@gmail.com>
parents:
1460
diff
changeset
|
63 BytesRef br = new BytesRef(); |
|
e5d48b85351c
start lucene.logging
Franklin Schmidt <fschmidt@gmail.com>
parents:
1460
diff
changeset
|
64 NumericUtils.intToPrefixCoded((Integer)value,0,br); |
|
e5d48b85351c
start lucene.logging
Franklin Schmidt <fschmidt@gmail.com>
parents:
1460
diff
changeset
|
65 return new Term(name,br); |
| 1460 | 66 } else |
| 67 throw new RuntimeException("invalid value type "+value.getClass()+"' for term '"+name+"'"); | |
| 68 } | |
| 69 | |
| 70 } |