source: gs3-extensions/solr/trunk/src/test/QueryTest.java@ 24644

// Adapted from
// http://wiki.constellio.com/index.php/Solrj_example


import java.net.MalformedURLException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.solr.client.solrj.SolrQuery;
import org.apache.solr.client.solrj.SolrServer;
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.response.FacetField;
import org.apache.solr.client.solrj.response.FacetField.Count;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.common.SolrDocumentList;
import org.apache.solr.common.params.ModifiableSolrParams;
import org.apache.solr.common.params.SolrParams;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.servlet.SolrRequestParsers;

import java.io.File;
import org.apache.solr.client.solrj.embedded.EmbeddedSolrServer;
import org.apache.solr.core.CoreContainer;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import org.xml.sax.SAXException;

import java.util.Collection;

/**
 * A simple main to illustrate how to execute a request using SolrJ
 * 
 */
public class QueryTest 
{
    protected static String solr_home_str = "C:\\cygwin\\home\\davidb\\research\\code\\greenstone3-svn-full\\web\\ext\\solr";

    private static final String myCore = "localsite-solr-jdbm-demo-didx";
    
    private static final String facet_field = "DS";
    
    // q=...
    //private static final String query = "TX:snails";
    private static final String query = "TX:farming";
    
    private static final int start = 0;
    private static final int nbDocuments = 11;
    
    public static void main(String[] args) throws IOException,
                          ParserConfigurationException,
                          SAXException,
                          SolrServerException {
    
    File solr_home = new File(solr_home_str);
    File solr_xml = new File( solr_home,"solr.xml" );

    try { 
        CoreContainer cores = new CoreContainer(solr_home_str,solr_xml);
        
        Collection<String> core_names = cores.getCoreNames();
        
        for (String name : core_names) {
        System.err.println("(**** core name: " + name);
        }
        
        EmbeddedSolrServer server = new EmbeddedSolrServer(cores,myCore);
        
        // Do the same query three times using three different method
        System.out.println("====== 1st way to execute a query ======");
        print(doFirstQuery(server));
        System.out.println("====== 2nd way to execute a query ======");
        print(doSecondQuery(server));
        System.out.println("====== 3rd way to execute query ======");
        print(doThirdQuery(server));
        
        /*
          System.out.println("======= Using SpellChecker ======");
          print(spellCheck(server, "farmng snals"));
    
        */

        cores.shutdown();
    }
    catch (Exception e) {
        e.printStackTrace();
    }

    }
    
    /**
     * Do the query using a StringBuffer
     */
    public static QueryResponse doFirstQuery(SolrServer server)
    throws SolrServerException {
    StringBuffer request = new StringBuffer();
    //request.append("collectionName=" + myCore);
    request.append("facet=" + true);
    request.append("&facet.field=" + facet_field);
    request.append("&q=" + query);
    request.append("&start=" + start);
    request.append("&rows=" + nbDocuments);
    SolrParams solrParams = SolrRequestParsers.parseQueryString(request
                                    .toString());

    System.err.println("*** URL request: " + solrParams);

    return server.query(solrParams);
    }
    
    /**
     * Do the query using a ModifiableSolrParams
     */
    public static QueryResponse doSecondQuery(SolrServer server)
    throws SolrServerException {
    ModifiableSolrParams solrParams = new ModifiableSolrParams();
    //solrParams.set("collectionName", myCore);
    solrParams.set("facet", "true");
    solrParams.set("facet.field", facet_field);
    solrParams.set("q", query);
    solrParams.set("start", start);
    solrParams.set("rows", nbDocuments);
    return server.query(solrParams);
    }
    
    /**
     * Do the query using a SolrQuery
     */
    public static QueryResponse doThirdQuery(SolrServer server)
    throws SolrServerException {
    SolrQuery solrQuery = new SolrQuery();
    solrQuery.setQuery(query);
    //solrQuery.set("collectionName", myCore);
    solrQuery.set("facet", "true");
    solrQuery.set("facet.field", facet_field);
    solrQuery.setStart(start);
    solrQuery.setRows(nbDocuments);
    return server.query(solrQuery);
    }
    
    /**
     * Do the query using a SolrQuery
     */
    public static QueryResponse spellCheck(SolrServer server, String badQuery)
    throws SolrServerException {
    SolrQuery solrQuery = new SolrQuery();
    solrQuery.setQuery(badQuery);
    solrQuery.set("collectionName", myCore);

    // qt=spellcheck || qt=spellchecker
    solrQuery.setQueryType("spellcheck");
    return server.query(solrQuery);
    }
    
    /**
     * Print documents and facets
     * 
     * @param response
     */
    @SuppressWarnings("unchecked")
    public static void print(QueryResponse response) {
    SolrDocumentList docs = response.getResults();
    if (docs != null) {
        System.out.println(docs.getNumFound() + " documents found, "
                   + docs.size() + " returned : ");
        for (int i = 0; i < docs.size(); i++) {
        SolrDocument doc = docs.get(i);
        System.out.println("\t" + doc.toString());
        }
    }
    
    List<FacetField> fieldFacets = response.getFacetFields();
    if (fieldFacets != null && !fieldFacets.isEmpty()) {
        System.out.println("\nField Facets : ");
        for (FacetField fieldFacet : fieldFacets) {
        System.out.print("\t" + fieldFacet.getName() + " :\t");
        if (fieldFacet.getValueCount() > 0) {
            for (Count count : fieldFacet.getValues()) {
            System.out.print(count.getName() + "["
                     + count.getCount() + "]\t");
            }
        }
        System.out.println("");
        }
    }
    
    Map<String, Integer> queryFacets = response.getFacetQuery();
    if (queryFacets != null && !queryFacets.isEmpty()) {
        System.out.println("\nQuery facets : ");
        for (String queryFacet : queryFacets.keySet()) {
        System.out.println("\t" + queryFacet + "\t["
                   + queryFacets.get(queryFacet) + "]");
        }
        System.out.println("");
    }
    
    NamedList<NamedList<Object>> spellCheckResponse = (NamedList<NamedList<Object>>) response
        .getResponse().get("spellcheck");
    
    if (spellCheckResponse != null) {
        Iterator<Entry<String, NamedList<Object>>> wordsIterator = spellCheckResponse
        .iterator();
        
        while (wordsIterator.hasNext()) {
        Entry<String, NamedList<Object>> entry = wordsIterator.next();
        String word = entry.getKey();
        NamedList<Object> spellCheckWordResponse = entry.getValue();
        boolean correct = spellCheckWordResponse.get("frequency")
            .equals(1);
        System.out.println("Word: " + word + ",\tCorrect?: " + correct);
        NamedList<Integer> suggestions = (NamedList<Integer>) spellCheckWordResponse
            .get("suggestions");
        if (suggestions != null && suggestions.size() > 0) {
            System.out.println("Suggestions : ");
            Iterator<Entry<String, Integer>> suggestionsIterator = suggestions
            .iterator();
            while (suggestionsIterator.hasNext()) {
            System.out.println("\t"
                       + suggestionsIterator.next().getKey());
            }
            
        }
        System.out.println("");
        }
        
    }
    
    }

}