Lucene Search configurations

================================================

pojo configuration:
=================
1. The first thing to do is to place an @Indexed annotation on the entity that will be
searchable through Hibernate Search

2.The second (and last) mandatory thing to do is to add a @DocumentId on the
entity’s identity property. Hibernate Search uses this property to make the link
between a database entry and an index entry

package com.manning.hsia.dvdstore.model;

@Indexed
public class Item {

@DocumentId
private Integer id;

@Field
private String title;

@Field
private String description;

@Field(index=Index.UN_TOKENIZED, store=Store.YES)
private String ean;

private String imageURL;
//public getters and setters
}



=================================================================

While building a query seems like a lot of steps, it’s a very easy process. In summary:

1 Build the Lucene query (using one of the query parsers or programmatically).

String searchQuery = "title:Batman OR description:Batman";

QueryParser parser = new QueryParser("title",new StandardAnalyzer());

org.apache.lucene.search.Query luceneQuery;

try {
luceneQuery = parser.parse(searchQuery);
}
catch (ParseException e) {
throw new RuntimeException("Unable to parse query: " + searchQuery, e);
}

An analyzer is responsible for breaking sentences into individual words.

2 Wrap the Lucene query inside a Hibernate Search query.

FullTextSession ftSession = org.hibernate.search.Search.getFullTextSession(session);


org.hibernate.Query query = ftSession.createFullTextQuery(luceneQuery,Item.class);


3 Optionally set some query properties (such as pagination).

query.setFirstResult(20)
.setMaxResults(20);

4 Execute the query

List results = query.list();
for (Item item : (List) results) {

display( "title: " + item.getTitle() + "\nDescription: " +item.getDescription() );
}