import org.apache.log4j.Category; import org.apache.lucene.document.Document; import org.apache.lucene.search.Hits; import search.SearchResultFactory; import java.io.IOException; /** *

* Encapsulates the results of a search. After a SearchResults has * been constructed from a Hits object, the IndexSearcher can be * safely closed. *

*

* SearchResults also provides a way of retrieving Java objects from * Documents (via {@link search.SearchResultsFactory}). *

*

* Note that this implementation uses code from * /projects/appex/search. *

*/ public class SearchResults { private static Category cat = Category.getInstance(SearchResults.class); private Document[] hitsDocuments; private Object[] objectResults; private int totalNumberOfResults; public SearchResults(Hits hits) throws IOException { this(hits, 0, hits.length()); } public SearchResults(Hits hits, int from, int to) throws IOException { hitsDocuments = new Document[hits.length()]; totalNumberOfResults = hits.length(); if (to > totalNumberOfResults) { to = totalNumberOfResults; } for (int i = from; i < to; i++) { hitsDocuments[i] = hits.doc(i); } } public int getTotalNumberOfResults() { return totalNumberOfResults; } /** * Obtain the results of the search as objects. */ public Object[] getResultsAsObjects() { if (objectResults == null) { objectResults = new Object[hitsDocuments.length]; for (int i = 0; i < hitsDocuments.length; i++) { try { objectResults[i] = SearchResultFactory. getDocAsObject(hitsDocuments[i]); } catch (Exception e) { cat.error("Error instantiating an object from a document.", e); } } } return objectResults; } }