|
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);
|
|
|
62 } else
|
|
|
63 throw new RuntimeException("invalid value type "+value.getClass()+"' for term '"+name+"'");
|
|
|
64 }
|
|
|
65
|
|
|
66 }
|
