org.dspace.search
Class DSQuery

java.lang.Object
  org.dspace.search.DSQuery

public class DSQuery
extends Object

DSIndexer contains various static methods for performing queries on indices, for collections and communities.

Constructor Summary

DSQuery()

Method Summary

static void	close() Close any IndexSearcher that is currently open.
static void	doCMDLineQuery(String query) Do a query, printing results to stdout largely for testing, but it is useful
static QueryResults	doQuery(Context c, QueryArgs args) Do a query, returning a QueryResults object
static QueryResults	doQuery(Context c, QueryArgs args, Collection coll) Do a query, restricted to a collection
static QueryResults	doQuery(Context c, QueryArgs args, Community comm) Do a query, restricted to a community
protected static org.apache.lucene.index.IndexReader	getIndexReader() get an IndexReader.
protected static org.apache.lucene.search.IndexSearcher	getSearcher(Context c) get an IndexSearcher, hopefully a cached one (gives much better performance.) checks to see if the index has been modified - if so, it creates a new IndexSearcher
static void	main(String[] args)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DSQuery

public DSQuery()

Method Detail

doQuery

public static QueryResults doQuery(Context c,
                                   QueryArgs args)
                            throws IOException

Do a query, returning a QueryResults object

Parameters:

c - context

args - query arguments in QueryArgs object

Returns:

query results QueryResults

Throws:

IOException

doQuery

public static QueryResults doQuery(Context c,
                                   QueryArgs args,
                                   Collection coll)
                            throws IOException

Do a query, restricted to a collection

Parameters:

c - context

args - query args

coll - collection to restrict to

Returns:

QueryResults same results as doQuery, restricted to a collection

Throws:

IOException

doQuery

public static QueryResults doQuery(Context c,
                                   QueryArgs args,
                                   Community comm)
                            throws IOException

Do a query, restricted to a community

Parameters:

c - context

args - query args

comm - community to restrict to

Returns:

QueryResults same results as doQuery, restricted to a collection

Throws:

IOException

doCMDLineQuery

public static void doCMDLineQuery(String query)

Do a query, printing results to stdout largely for testing, but it is useful

close

public static void close()

Close any IndexSearcher that is currently open.

main

public static void main(String[] args)

getIndexReader

protected static org.apache.lucene.index.IndexReader getIndexReader()
                                                             throws IOException

get an IndexReader.

Throws:

IOException

getSearcher

protected static org.apache.lucene.search.IndexSearcher getSearcher(Context c)
                                                             throws IOException

get an IndexSearcher, hopefully a cached one (gives much better performance.) checks to see if the index has been modified - if so, it creates a new IndexSearcher

Throws:

IOException