simplelucenesearcher.java

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/*
 * Copyright 2004 JavaFree.org
 *
 * Licensed 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.javabb.lucene.search;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.javabb.infra.Monitor;
import org.springframework.core.io.Resource;


/**
 * @author <a href="mailto:[e-mail]">Marcos Silva Pereira</a>
 *
 * @version $Id: SimpleLuceneSearcher.java,v 1.4.8.3 2007/11/22 03:06:45 daltoncamargo Exp $
 */
public class SimpleLuceneSearcher implements LuceneSearcher {

    private Directory path;
	private Analyzer analyzer;

	private static Object monitor = Monitor.MONITOR;

    /**
	 * @param path
	 * @param analyzer
	 */
	public SimpleLuceneSearcher ( Directory path, Analyzer analyzer ) {
		this.path = path;
		this.analyzer = analyzer;
	}

	/**
	 * @param path
	 * @param analyzer
	 * @throws IOException
	 */
	public SimpleLuceneSearcher ( Resource path, Analyzer analyzer ) throws IOException {
		this(FSDirectory.getDirectory(path.getFile(), false), analyzer);
	}

	
	/**
	 * Simple search
	 */
	public List search(String query, String[] fields) {
    	List result = new ArrayList();

        try {
        	synchronized (monitor) {
				IndexSearcher searcher = new IndexSearcher(path);
				Query queryObj;
				BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
		                BooleanClause.Occur.SHOULD};
				queryObj = MultiFieldQueryParser.parse(query, fields, flags, analyzer);

				Hits hits = searcher.search(queryObj);

		        for (int i = 0; i < hits.length(); i++) {
		            Document document = hits.doc(i);
					String idValue = document.getField("postId").stringValue();
		            long postId = Long.parseLong(idValue);
					result.add(new Long(postId));
		        }
				searcher.close();
			}
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return result;
	}
	
	/**
     * @see org.javabb.lucene.search.LuceneSearcher#search(java.lang.String)
     */
    public List search(String query[], String[] fields) {
    	List result = new ArrayList();
    	
        try {
        	synchronized (monitor) {
        		IndexSearcher searcher = new IndexSearcher(path);
				Query queryObj;
				BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
				                BooleanClause.Occur.SHOULD,
				                BooleanClause.Occur.SHOULD};
				queryObj = MultiFieldQueryParser.parse(query, fields, flags, analyzer);
				Hits hits = searcher.search(queryObj);

		        for (int i = 0; i < hits.length(); i++) {
		            Document document = hits.doc(i);
					String idValue = document.getField("postId").stringValue();
		            long postId = Long.parseLong(idValue);
		            long forumId = new Long(document.getField("forumId").stringValue()).longValue();
		            long forumByParameterId = new Long(query[2]).longValue();
		            if(forumId == forumByParameterId){
		            	result.add(new Long(postId));
		            }
		        }
				searcher.close();
			}
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return result;
    }

}