/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr.handler.component;
import java.io.IOException;
import java.net.URL;
import org.apache.solr.common.params.MoreLikeThisParams;
import org.apache.solr.common.params.SolrParams;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.common.util.SimpleOrderedMap;
import org.apache.solr.handler.MoreLikeThisHandler;
import org.apache.solr.schema.IndexSchema;
import org.apache.solr.search.DocIterator;
import org.apache.solr.search.DocList;
import org.apache.solr.search.DocListAndSet;
import org.apache.solr.search.SolrIndexSearcher;
/**
* TODO!
*
* @version $Id: MoreLikeThisComponent.java 1064775 2011-01-28 16:58:46Z koji $
* @since solr 1.3
*/
public class MoreLikeThisComponent extends SearchComponent
{
public static final String COMPONENT_NAME = "mlt";
@Override
public void prepare(ResponseBuilder rb) throws IOException
{
}
@Override
public void process(ResponseBuilder rb) throws IOException
{
SolrParams p = rb.req.getParams();
if( p.getBool( MoreLikeThisParams.MLT, false ) ) {
SolrIndexSearcher searcher = rb.req.getSearcher();
NamedList<DocList> sim = getMoreLikeThese( rb, searcher,
rb.getResults().docList, rb.getFieldFlags() );
// TODO ???? add this directly to the response?
rb.rsp.add( "moreLikeThis", sim );
}
}
NamedList<DocList> getMoreLikeThese( ResponseBuilder rb, SolrIndexSearcher searcher,
DocList docs, int flags ) throws IOException {
SolrParams p = rb.req.getParams();
IndexSchema schema = searcher.getSchema();
MoreLikeThisHandler.MoreLikeThisHelper mltHelper
= new MoreLikeThisHandler.MoreLikeThisHelper( p, searcher );
NamedList<DocList> mlt = new SimpleOrderedMap<DocList>();
DocIterator iterator = docs.iterator();
SimpleOrderedMap<Object> dbg = null;
if( rb.isDebug() ){
dbg = new SimpleOrderedMap<Object>();
}
while( iterator.hasNext() ) {
int id = iterator.nextDoc();
int rows = p.getInt( MoreLikeThisParams.DOC_COUNT, 5 );
DocListAndSet sim = mltHelper.getMoreLikeThis( id, 0, rows, null, null, flags );
String name = schema.printableUniqueKey( searcher.doc( id ) );
mlt.add(name, sim.docList);
if( dbg != null ){
SimpleOrderedMap<Object> docDbg = new SimpleOrderedMap<Object>();
docDbg.add( "rawMLTQuery", mltHelper.getRawMLTQuery().toString() );
docDbg.add( "boostedMLTQuery", mltHelper.getBoostedMLTQuery().toString() );
docDbg.add( "realMLTQuery", mltHelper.getRealMLTQuery().toString() );
SimpleOrderedMap<Object> explains = new SimpleOrderedMap<Object>();
DocIterator mltIte = sim.docList.iterator();
while( mltIte.hasNext() ){
int mltid = mltIte.nextDoc();
String key = schema.printableUniqueKey( searcher.doc( mltid ) );
explains.add( key, searcher.explain( mltHelper.getRealMLTQuery(), mltid ) );
}
docDbg.add( "explain", explains );
dbg.add( name, docDbg );
}
}
// add debug information
if( dbg != null ){
rb.addDebugInfo( "moreLikeThis", dbg );
}
return mlt;
}
/////////////////////////////////////////////
/// SolrInfoMBean
////////////////////////////////////////////
@Override
public String getDescription() {
return "More Like This";
}
@Override
public String getVersion() {
return "$Revision: 1064775 $";
}
@Override
public String getSourceId() {
return "$Id: MoreLikeThisComponent.java 1064775 2011-01-28 16:58:46Z koji $";
}
@Override
public String getSource() {
return "$URL: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_3_5/solr/core/src/java/org/apache/solr/handler/component/MoreLikeThisComponent.java $";
}
@Override
public URL[] getDocs() {
return null;
}
}