SearchHelper.java

/*
 * Copyright (C) 2013 Atol Conseils et Développements.
 * http://www.atolcd.com/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.atolcd.alfresco.helper;

import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.StoreRef;
import org.alfresco.service.cmr.search.ResultSet;
import org.alfresco.service.cmr.search.ResultSetRow;
import org.alfresco.service.cmr.search.SearchParameters;
import org.alfresco.service.cmr.search.SearchService;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.Assert;

public class SearchHelper implements InitializingBean {

	private static SearchService searchService;

	public void setSearchService(SearchService searchService) {
		SearchHelper.searchService = searchService;
	}

	@Override
	public void afterPropertiesSet() throws Exception {
		Assert.notNull(searchService);
	}

	/**
	 * Execute Lucene query and return the first result (NodeRef). Return null
	 * if there is no result
	 * 
	 * @param query
	 *            String Lucene query
	 * @return NodeRef
	 */
	static public NodeRef getFirstFromQuery(String query) {
		NodeRef nodeRef = null;
		SearchParameters sp = new SearchParameters();
		sp.addStore(new StoreRef("workspace://SpacesStore"));
		sp.setLanguage(SearchService.LANGUAGE_LUCENE);
		sp.setQuery(query);
		ResultSet results = null;

		try {
			results = searchService.query(sp);
			if (results.length() > 0) {
				ResultSetRow row = results.getRow(0);
				nodeRef = row.getNodeRef();
			}
		} finally {
			if (results != null) {
				results.close();
			}
		}
		return nodeRef;
	}
}