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14.2. Mapping Properties Multiple Times
Properties may need to be mapped multiple times per index, using different indexing strategies. For example, sorting a query by field requires that the field is not analyzed. To search by words in this property and also sort it, the property will need to be indexed it twice - once analyzed and once un-analyzed.
@Fields can be used to perform this search. For example:
Example 14.3. Using @Fields to map a property multiple times
@Indexed(index = "Book")
public class Book {
@Fields( {
@Field,
@Field(name = "summary_forSort", analyze = Analyze.NO, store = Store.YES)
})
public String getSummary() {
return summary;
}
}
In the example above, the field
summary is indexed twice - once as summary in a tokenized way, and once as summary_forSort in an untokenized way. @Field supports 2 attributes useful when @Fields is used:
- analyzer: defines a @Analyzer annotation per field rather than per property
- bridge: defines a @FieldBridge annotation per field rather than per property
