/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
Stefano Mazzocchi <stefano@apache.org>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.generation;
import org.apache.avalon.framework.activity.Initializable;
import org.apache.avalon.framework.activity.Disposable;
import org.apache.avalon.framework.context.Context;
import org.apache.avalon.framework.context.ContextException;
import org.apache.avalon.framework.context.Contextualizable;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.cocoon.Constants;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.components.search.LuceneCocoonSearcher;
import org.apache.cocoon.components.search.LuceneXMLIndexer;
import org.apache.cocoon.components.search.LuceneCocoonPager;
import org.apache.cocoon.components.search.LuceneCocoonHelper;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.search.Hits;
import org.apache.lucene.store.Directory;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Enumeration;
/**
* Generates an XML representation of a search result.
*
* <p>
* This generator generates xml content representening an XML search.
* The generated xml content contains the search result,
* the search query information, and navigation information about the
* search results.
* The query is sent to the generator, either via the 'queryString' request parameter
* or the 'query' SiteMap parameter. The sitemap overides the request.
* </p>
*
* <p>
* Search xml sample generated by this generator:
* </p>
* <pre><tt>
* <?xml version="1.0" encoding="UTF-8"?>
*
* <search:results date="1008437081064" query-string="cocoon"
* start-index="0" page-length="10"
* xmlns:search="http://apache.org/cocoon/search/1.0"
* xmlns:xlink="http://www.w3.org/1999/xlink">
* <search:hits total-count="125" count-of-pages="13">
* <search:hit rank="0" score="1.0"
* uri="http://localhost:8080/cocoon/documents/hosting.html">
* <search:field name="title">Document Title<search:field/>
* <search:hit/>
* ...
* </search:hits>
*
* <search:navigation total-count="125" count-of-pages="13"
* has-next="true" has-previous="false" next-index="10" previous-index="0">
* <search:navigation-page start-index="0"/>
* <search:navigation-page start-index="10"/>
* ...
* <search:navigation-page start-index="120"/>
* </search:navigation>
* </search:results>
* </tt></pre>
*
* @author <a href="mailto:berni_huber@a1.net">Bernhard Huber</a>
* @author <a href="mailto:vgritsenko@apache.org">Vadim Gritsenko</a>
* @author <a href="mailto:jeremy@apache.org">Jeremy Quinn</a>
* @version CVS $Id: SearchGenerator.java,v 1.3 2003/09/04 09:38:38 cziegeler Exp $
*/
public class SearchGenerator extends ServiceableGenerator
implements Contextualizable, Initializable, Disposable
{
/**
* The XML namespace for the output document.
*/
protected final static String namespace = "http://apache.org/cocoon/search/1.0";
/**
* The XML namespace for xlink
*/
protected final static String xlinkNamespace = "http://www.w3.org/1999/xlink";
/**
* Description of the Field
*/
protected final static String CDATA = "CDATA";
/**
* Root element of generated xml content, ie <code>results</code>.
*/
protected final static String RESULTS_ELEMENT = "results";
/**
* Attribute <code>date</code> of <code>results</code> element.
* It contains the date a long value, indicating when a search
* generated this xml content.
*/
protected final static String DATE_ATTRIBUTE = "date";
/**
* Attribute <code>query-string</code> of <code>results</code> element.
* Echos the <code>queryString</code> query parameter.
*/
protected final static String QUERY_STRING_ATTRIBUTE = "query-string";
/**
* Attribute <code>start-index</code> of <code>results</code> element.
* Echos the <code>startIndex</code> query parameter.
*/
protected final static String START_INDEX_ATTRIBUTE = "start-index";
/**
* Attribute <code>page-length</code> of <code>results</code> element.
* Echos the <code>pageLenth</code> query parameter.
*/
protected final static String PAGE_LENGTH_ATTRIBUTE = "page-length";
/**
* Child element of generated xml content, ie <code>hits</code>.
* This element describes all hits.
*/
protected final static String HITS_ELEMENT = "hits";
/**
* Attribute <code>total-count</code> of <code>hits</code> element.
* The value describes total number of hits found by the search engine.
*/
protected final static String TOTAL_COUNT_ATTRIBUTE = "total-count";
/**
* Attribute <code>count-of-pages</code> of <code>hits</code> element.
* The value describes number of pages needed for all hits.
*/
protected final static String COUNT_OF_PAGES_ATTRIBUTE = "count-of-pages";
/**
* Child element of generated xml content, ie <code>hit</code>.
* This element describes a single hit.
*/
protected final static String HIT_ELEMENT = "hit";
/**
* Attribute <code>rank</code> of <code>hit</code> element.
* The value describes the count index of this hits, ranging between 0, and
* total-count minus 1.
*/
protected final static String RANK_ATTRIBUTE = "rank";
/**
* Attribute <code>score</code> of <code>hit</code> element.
* The value describes the score of this hits, ranging between 0, and 1.0.
*/
protected final static String SCORE_ATTRIBUTE = "score";
/**
* Attribute <code>uri</code> of <code>hit</code> element.
* The value describes the uri of a document matching the search query.
*/
protected final static String URI_ATTRIBUTE = "uri";
/**
* Child element <code>field</code> of the <code>hit</code> element.
* This element contains value of the stored field of a hit.
*
* @since 2.0.4
*/
protected final static String FIELD_ELEMENT = "field";
/**
* Child element of generated xml content, ie <code>navigation</code>.
* This element describes some hints for easier navigation.
*/
protected final static String NAVIGATION_ELEMENT = "navigation";
/**
* Child element of generated xml content, ie <code>navigation</code>.
* This element describes the start-index of page containing hits.
*/
protected final static String NAVIGATION_PAGE_ELEMENT = "navigation-page";
/**
* Attribute <code>has-next</code> of <code>navigation-page</code> element.
* The value is true if a next navigation control should be presented.
*/
protected final static String HAS_NEXT_ATTRIBUTE = "has-next";
/**
* Attribute <code>has-next</code> of <code>navigation-page</code> element.
* The value is true if a previous navigation control should be presented.
*/
protected final static String HAS_PREVIOUS_ATTRIBUTE = "has-previous";
/**
* Attribute <code>next-index</code> of <code>navigation-page</code> element.
* The value describes the start-index of the next-to-be-presented page.
*/
protected final static String NEXT_INDEX_ATTRIBUTE = "next-index";
/**
* Attribute <code>previous-index</code> of <code>navigation-page</code> element.
* The value describes the start-index of the previous-to-be-presented page.
*/
protected final static String PREVIOUS_INDEX_ATTRIBUTE = "previous-index";
/**
* Setup parameter name of index directory, ie <code>index</code>.
*/
protected final static String INDEX_PARAM = "index";
/**
* Default value of setup parameter <code>index</code>, ie <code>index</code>.
*/
protected final static String INDEX_PARAM_DEFAULT = "index";
/**
* Setup the actual query from generator parameter,
* ie <code>query</code>.
*/
protected final static String QUERY_PARAM = "query";
/**
* Setup parameter name specifying the name of query-string query parameter,
* ie <code>query-string</code>.
*/
protected final static String QUERY_STRING_PARAM = "query-string";
/**
* Default value of setup parameter <code>query-string</code>, ie <code>queryString</code>.
*/
protected final static String QUERY_STRING_PARAM_DEFAULT = "queryString";
/**
* Setup parameter name specifying the name of start-index query parameter,
* ie <code>start-index</code>.
*/
protected final static String START_INDEX_PARAM = "start-index";
/**
* Default value of setup parameter <code>start-index</code>, ie <code>startIndex</code>.
*/
protected final static String START_INDEX_PARAM_DEFAULT = "startIndex";
/**
* Setup parameter name specifying the name of start-next-index query parameter,
* ie <code>start-next-index</code>.
*/
protected final static String START_INDEX_NEXT_PARAM = "start-next-index";
/**
* Default value of setup parameter <code>start-next-index</code>, ie <code>startNextIndex</code>.
*/
protected final static String START_INDEX_NEXT_PARAM_DEFAULT = "startNextIndex";
/**
* Setup parameter name specifying the name of start-previous-index query parameter,
* ie <code>start-previous-index</code>.
*/
protected final static String START_INDEX_PREVIOUS_PARAM = "start-previous-index";
/**
* Default value of setup parameter <code>start-previous-index</code>, ie <code>startPreviousIndex</code>.
*/
protected final static String START_INDEX_PREVIOUS_PARAM_DEFAULT = "startPreviousIndex";
/**
*Description of the Field
*
* @since
*/
protected final static int START_INDEX_DEFAULT = 0;
/**
* Setup parameter name specifying the name of page-length query parameter,
* ie <code>page-length</code>.
*/
protected final static String PAGE_LENGTH_PARAM = "page-length";
/**
*Description of the Field
*
* @since
*/
protected final static String PAGE_LENGTH_PARAM_DEFAULT = "pageLength";
/**
*Description of the Field
*
* @since
*/
protected final static int PAGE_LENGTH_DEFAULT = 10;
/**
* Default home directory of index directories.
* <p>
* Releative index directories specified in the setup of this generator are resolved
* relative to this directory.
* </p>
* <p>
* By default this directory is set to the <code>WORKING_DIR</code> of Cocoon.
* </p>
*/
private File workDir = null;
/**
* The avalon component to use for searching.
*/
private LuceneCocoonSearcher lcs;
/**
* Absolute filesystem directory of lucene index directory
*/
private File index = null;
/**
* Query-string to search for
*/
private String queryString = "";
/**
* Attributes used when generating xml content.
*/
private final AttributesImpl atts = new AttributesImpl();
/**
* startIndex of query parameter
*/
private Integer startIndex = null;
/**
* pageLength of query parameter
*/
private Integer pageLength = null;
// TODO: parameterize()
/**
* Set the current <code>ServiceManager</code> instance used by this
* <code>Serviceable</code>.
*/
public void service(ServiceManager manager) throws ServiceException {
super.service(manager);
// lcs = (LuceneCocoonSearcher) this.manager.lookup(LuceneCocoonSearcher.ROLE);
}
/**
* setup all members of this generator.
*
* @since
*/
public void setup(SourceResolver resolver, Map objectModel, String src, Parameters par)
throws ProcessingException, SAXException, IOException {
super.setup(resolver, objectModel, src, par);
String param_name;
Request request = ObjectModelHelper.getRequest(objectModel);
// get the analyzer
// Analyzer analyzer = LuceneCocoonHelper.getAnalyzer("org.apache.lucene.analysis.standard.StandardAnalyzer");
// lcs.setAnalyzer(analyzer);
String index_file_name = par.getParameter(INDEX_PARAM, INDEX_PARAM_DEFAULT);
if (request.getParameter(INDEX_PARAM) != null) {
index_file_name = request.getParameter(INDEX_PARAM);
}
// now set the index
index = new File(index_file_name);
if (!index.isAbsolute()) {
index = new File(workDir, index.toString());
}
// try getting the queryString from the generator sitemap params
queryString = "";
queryString = par.getParameter(QUERY_PARAM, "");
// try getting the queryString from the request params
if (queryString.equals("")) {
param_name = par.getParameter(QUERY_STRING_PARAM, QUERY_STRING_PARAM_DEFAULT);
if (request.getParameter(param_name) != null) {
queryString = request.getParameter(param_name);
}
}
// always try lookup the start index from the request params
// get startIndex
startIndex = null;
param_name = par.getParameter(START_INDEX_NEXT_PARAM, START_INDEX_NEXT_PARAM_DEFAULT);
if (request.getParameter(param_name) != null) {
startIndex = createInteger(request.getParameter(param_name));
}
if (startIndex == null) {
param_name = par.getParameter(START_INDEX_PREVIOUS_PARAM, START_INDEX_PREVIOUS_PARAM_DEFAULT);
if (request.getParameter(param_name) != null) {
startIndex = createInteger(request.getParameter(param_name));
}
}
if (startIndex == null) {
param_name = par.getParameter(START_INDEX_PARAM, START_INDEX_PARAM_DEFAULT);
if (request.getParameter(param_name) != null) {
startIndex = createInteger(request.getParameter(param_name));
}
}
// get pageLength
param_name = par.getParameter(PAGE_LENGTH_PARAM, PAGE_LENGTH_PARAM_DEFAULT);
if (request.getParameter(param_name) != null) {
pageLength = createInteger(request.getParameter(param_name));
}
}
/**
* Contextualize this class.
*
* <p>
* Especially retrieve the work directory.
* If the index directory is specified relativly, the working directory is
* used as home directory of the index directory.
* </p>
*
* @param context Context to use
* @exception ContextException If contextualizing fails.
* @since
*/
public void contextualize(Context context) throws ContextException {
// retrieve the working directory, assuming that the index may reside there
workDir = (File) context.get(Constants.CONTEXT_WORK_DIR);
}
public void initialize() throws IOException {
// get the directory where the index resides
// Directory directory = LuceneCocoonHelper.getDirectory(new File(workDir, "index"), false);
// lcs.setDirectory(directory);
}
/**
* Generate xml content describing search results.
* Entry point of the ComposerGenerator.
* The xml content is generated from the hits object.
*
*
* @exception IOException when there is a problem reading the from file system.
* @since
* @throws SAXException when there is a problem creating the output SAX events.
* @throws ProcessingException when there is a problem obtaining the hits
*/
public void generate() throws IOException, SAXException, ProcessingException {
// set default parameter value, in case of no values are set yet.
if (startIndex == null) {
startIndex = new Integer(START_INDEX_DEFAULT);
}
if (pageLength == null) {
pageLength = new Integer(PAGE_LENGTH_DEFAULT);
}
// Start the document and set the namespace.
this.contentHandler.startDocument();
this.contentHandler.startPrefixMapping("search", namespace);
this.contentHandler.startPrefixMapping("xlink", xlinkNamespace);
generateResults();
// End the document.
this.contentHandler.endPrefixMapping("xlink");
this.contentHandler.endPrefixMapping("");
this.contentHandler.endDocument();
}
/**
* Create an Integer.
* <p>
* Create an Integer from String s, iff conversion fails return null.
* </p>
*
* @param s Converting s to an Integer
* @return Integer converted value originating from s, or null
* @since
*/
private Integer createInteger(String s) {
Integer i = null;
try {
i = new Integer(s);
} catch (NumberFormatException nfe) {
// ignore it, write only warning
if (getLogger().isWarnEnabled()) {
getLogger().warn("Cannot convert " + s + " to Integer", nfe);
}
}
return i;
}
/**
* Build and generate the search results.
* <p>
* First build the hits, next generate xml content from the hits,
* taking page index, and length into account.
* </p>
*
* @since
* @throws SAXException when there is a problem creating the output SAX events.
* @throws ProcessingException when there is a problem obtaining the hits
*/
private void generateResults() throws SAXException, ProcessingException {
// Make the hits
LuceneCocoonPager pager = buildHits();
// The current date and time.
long time = System.currentTimeMillis();
atts.clear();
atts.addAttribute(namespace, DATE_ATTRIBUTE,
DATE_ATTRIBUTE, CDATA, String.valueOf(time));
if (queryString != null && queryString.length() > 0)
atts.addAttribute(namespace, QUERY_STRING_ATTRIBUTE,
QUERY_STRING_ATTRIBUTE, CDATA, String.valueOf(queryString));
atts.addAttribute(namespace, START_INDEX_ATTRIBUTE,
START_INDEX_ATTRIBUTE, CDATA, String.valueOf(startIndex));
atts.addAttribute(namespace, PAGE_LENGTH_ATTRIBUTE,
PAGE_LENGTH_ATTRIBUTE, CDATA, String.valueOf(pageLength));
contentHandler.startElement(namespace, RESULTS_ELEMENT, RESULTS_ELEMENT, atts);
// build xml from the hits
generateHits(pager);
generateNavigation(pager);
// End root element.
contentHandler.endElement(namespace, "results", "results");
}
/**
* Generate the xml content of all hits
*
* @param pager the LuceneContentPager with the search results
* @since
* @throws SAXException when there is a problem creating the output SAX events.
*/
private void generateHits(LuceneCocoonPager pager) throws SAXException {
if (pager != null && pager.hasNext()) {
atts.clear();
atts.addAttribute(namespace, TOTAL_COUNT_ATTRIBUTE, TOTAL_COUNT_ATTRIBUTE,
CDATA, String.valueOf(pager.getCountOfHits()));
atts.addAttribute(namespace, COUNT_OF_PAGES_ATTRIBUTE, COUNT_OF_PAGES_ATTRIBUTE,
CDATA, String.valueOf(pager.getCountOfPages()));
contentHandler.startElement(namespace, HITS_ELEMENT, HITS_ELEMENT, atts);
generateHit(pager);
contentHandler.endElement(namespace, HITS_ELEMENT, HITS_ELEMENT);
}
}
/**
* Generate the xml content for each hit.
*
* @param pager the LuceneCocoonPager with the search results.
* @since
* @throws SAXException when there is a problem creating the output SAX events.
*/
private void generateHit(LuceneCocoonPager pager) throws SAXException {
// get the off set to start from
int counter = pager.getStartIndex();
// get an list of hits which should be placed onto a single page
List l = (List) pager.next();
Iterator i = l.iterator();
for (; i.hasNext(); counter++) {
LuceneCocoonPager.HitWrapper hw = (LuceneCocoonPager.HitWrapper) i.next();
Document doc = hw.getDocument();
float score = hw.getScore();
String uri = doc.get(LuceneXMLIndexer.URL_FIELD);
atts.clear();
atts.addAttribute(namespace, RANK_ATTRIBUTE, RANK_ATTRIBUTE, CDATA,
String.valueOf(counter));
atts.addAttribute(namespace, SCORE_ATTRIBUTE, SCORE_ATTRIBUTE, CDATA,
String.valueOf(score));
atts.addAttribute(namespace, URI_ATTRIBUTE, URI_ATTRIBUTE, CDATA,
String.valueOf(uri));
contentHandler.startElement(namespace, HIT_ELEMENT, HIT_ELEMENT, atts);
// fix me, add here a summary of this hit
for (Enumeration e = doc.fields(); e.hasMoreElements(); ) {
Field field = (Field)e.nextElement();
if (field.isStored()) {
if (LuceneXMLIndexer.URL_FIELD.equals(field.name()))
continue;
atts.clear();
atts.addAttribute(namespace, "name", "name", CDATA, field.name());
contentHandler.startElement(namespace, FIELD_ELEMENT, FIELD_ELEMENT, atts);
String value = field.stringValue();
contentHandler.characters(value.toCharArray(), 0, value.length());
contentHandler.endElement(namespace, FIELD_ELEMENT, FIELD_ELEMENT);
}
}
contentHandler.endElement(namespace, HIT_ELEMENT, HIT_ELEMENT);
}
}
/**
* Generate the navigation element.
*
* @param pager Description of Parameter
* @exception SAXException Description of Exception
* @since
*/
private void generateNavigation(LuceneCocoonPager pager) throws SAXException {
if (pager != null) {
// generate navigation element
atts.clear();
atts.addAttribute(namespace, TOTAL_COUNT_ATTRIBUTE, TOTAL_COUNT_ATTRIBUTE,
CDATA, String.valueOf(pager.getCountOfHits()));
atts.addAttribute(namespace, COUNT_OF_PAGES_ATTRIBUTE, COUNT_OF_PAGES_ATTRIBUTE,
CDATA, String.valueOf(pager.getCountOfPages()));
atts.addAttribute(namespace, HAS_NEXT_ATTRIBUTE, HAS_NEXT_ATTRIBUTE,
CDATA, String.valueOf(pager.hasNext()));
atts.addAttribute(namespace, HAS_PREVIOUS_ATTRIBUTE, HAS_PREVIOUS_ATTRIBUTE,
CDATA, String.valueOf(pager.hasPrevious()));
atts.addAttribute(namespace, NEXT_INDEX_ATTRIBUTE, NEXT_INDEX_ATTRIBUTE,
CDATA, String.valueOf(pager.nextIndex()));
atts.addAttribute(namespace, PREVIOUS_INDEX_ATTRIBUTE, PREVIOUS_INDEX_ATTRIBUTE,
CDATA, String.valueOf(pager.previousIndex()));
contentHandler.startElement(namespace, NAVIGATION_ELEMENT, NAVIGATION_ELEMENT, atts);
int count_of_pages = pager.getCountOfPages();
for (int i = 0, page_start_index = 0;
i < count_of_pages;
i++, page_start_index += pageLength.intValue()) {
atts.clear();
atts.addAttribute(namespace, START_INDEX_ATTRIBUTE, START_INDEX_ATTRIBUTE,
CDATA, String.valueOf(page_start_index));
contentHandler.startElement(namespace, NAVIGATION_PAGE_ELEMENT, NAVIGATION_PAGE_ELEMENT, atts);
contentHandler.endElement(namespace, NAVIGATION_PAGE_ELEMENT, NAVIGATION_PAGE_ELEMENT);
}
// navigation is EMPTY element
contentHandler.endElement(namespace, NAVIGATION_ELEMENT, NAVIGATION_ELEMENT);
}
}
/**
* Build hits from a query input, and setup paging object.
*
* @since
* @throws ProcessingException iff an error occurs
*/
private LuceneCocoonPager buildHits() throws ProcessingException {
if (queryString != null && queryString.length() != 0) {
Hits hits = null;
// TODO (VG): Move parts into compose/initialize/recycle
try {
lcs = (LuceneCocoonSearcher) this.manager.lookup(LuceneCocoonSearcher.ROLE);
Analyzer analyzer = LuceneCocoonHelper.getAnalyzer("org.apache.lucene.analysis.standard.StandardAnalyzer");
lcs.setAnalyzer(analyzer);
// get the directory where the index resides
Directory directory = LuceneCocoonHelper.getDirectory(index, false);
lcs.setDirectory(directory);
hits = lcs.search(queryString, LuceneXMLIndexer.BODY_FIELD);
} catch (IOException ioe) {
throw new ProcessingException("IOException in search", ioe);
} catch (ServiceException ce) {
throw new ProcessingException("ComponentException in search", ce);
} finally {
if (lcs != null) {
this.manager.release(lcs);
lcs = null;
}
}
// wrap the hits by an pager help object for accessing only a range of hits
LuceneCocoonPager pager = new LuceneCocoonPager(hits);
int start_index = START_INDEX_DEFAULT;
if (this.startIndex != null) {
start_index = this.startIndex.intValue();
if (start_index <= 0) {
start_index = 0;
}
pager.setStartIndex(start_index);
}
int page_length = PAGE_LENGTH_DEFAULT;
if (this.pageLength != null) {
page_length = this.pageLength.intValue();
if (page_length <= 0) {
page_length = hits.length();
}
pager.setCountOfHitsPerPage(page_length);
}
return pager;
}
return null;
}
/**
* Recycle the generator
*/
public void recycle() {
super.recycle();
this.queryString = null;
this.startIndex = null;
this.pageLength = null;
this.index = null;
}
public void dispose() {
// if (lcs != null) {
// this.manager.release(lcs);
// lcs = null;
// }
super.dispose();
}
}