org.dspace.app.util
Class OpenSearch

java.lang.Object
  org.dspace.app.util.OpenSearch

public class OpenSearch
extends Object

Utility Class with static methods for producing OpenSearch-compliant search results, and the OpenSearch description document.

OpenSearch is a specification for describing and advertising search-engines and their result formats. Commonly, RSS and Atom formats are used, which the current implementation supports, as is HTML (used directly in browsers). NB: this is baseline OpenSearch, no extensions currently supported.

The value of the "scope" parameter should either be absent (which means no scope restriction), or the handle of a community or collection.

Author:

Richard Rodgers

Constructor Summary

OpenSearch()

Method Summary

static String	getContentType(String format) Returns a mime-type associated with passed format
static String	getDescription(String scope) Returns OpenSearch Servic Document as a string
static Document	getDescriptionDoc(String scope) Returns the OpenSearch service document appropriate for given scope
static List<String>	getFormats() Returns list of supported formats
static Document	getResultsDoc(String format, String query, int totalResults, int start, int pageSize, DSpaceObject scope, DSpaceObject[] results, Map<String,String> labels) Returns a formatted set of search results as a document
static String	getResultsString(String format, String query, int totalResults, int start, int pageSize, DSpaceObject scope, DSpaceObject[] results, Map<String,String> labels) Returns a formatted set of search results as a string
static DSpaceObject	resolveScope(Context context, String scope)

Methods inherited from class java.lang.Object

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

Constructor Detail

OpenSearch

public OpenSearch()

Method Detail

getFormats

public static List<String> getFormats()

Returns list of supported formats

Returns:

list of format names - 'rss', 'atom' or 'html'

getContentType

public static String getContentType(String format)

Returns a mime-type associated with passed format

Parameters:

format - the results document format (rss, atom, html)

Returns:

content-type mime-type

getDescriptionDoc

public static Document getDescriptionDoc(String scope)
                                  throws IOException

Returns the OpenSearch service document appropriate for given scope

Parameters:

scope - - null for entire repository, or handle or community or collection

Returns:

document the service document

Throws:

IOException

getDescription

public static String getDescription(String scope)

Returns OpenSearch Servic Document as a string

Parameters:

scope - - null for entire repository, or handle or community or collection

Returns:

service document as a string

getResultsString

public static String getResultsString(String format,
                                      String query,
                                      int totalResults,
                                      int start,
                                      int pageSize,
                                      DSpaceObject scope,
                                      DSpaceObject[] results,
                                      Map<String,String> labels)
                               throws IOException

Returns a formatted set of search results as a string

Parameters:

format - results format - html, rss or atom

query - - the search query

totalResults - - the hit count

start - - start result index

pageSize - - page size

scope - - search scope, null or community/collection handle

results - the retreived DSpace objects satisfying search

labels - labels to apply - format specific

Returns:

formatted search results

Throws:

IOException

getResultsDoc

public static Document getResultsDoc(String format,
                                     String query,
                                     int totalResults,
                                     int start,
                                     int pageSize,
                                     DSpaceObject scope,
                                     DSpaceObject[] results,
                                     Map<String,String> labels)
                              throws IOException

Returns a formatted set of search results as a document

Parameters:

format - results format - html, rss or atom

query - - the search query

totalResults - - the hit count

start - - start result index

pageSize - - page size

scope - - search scope, null or community/collection handle

results - the retreived DSpace objects satisfying search

labels - labels to apply - format specific

Returns:

formatted search results

Throws:

IOException

resolveScope

public static DSpaceObject resolveScope(Context context,
                                        String scope)
                                 throws SQLException

Throws:

SQLException