com.ushahidi.swiftriver.core.solr.util.QueryUtil.java Source code

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Here is the source code for com.ushahidi.swiftriver.core.solr.util.QueryUtil.java

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/**
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/agpl.html>
 * 
 * Copyright (C) Ushahidi Inc. All Rights Reserved.
 */
package com.ushahidi.swiftriver.core.solr.util;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang.StringUtils;

/**
 * Utility class for Solr search operations
 * 
 * @author ekala
 */
public class QueryUtil {

    /**
     * Given a comma-separated list of search terms; 
     * <code>searchTerms</code>, converts the list to an array
     * and concatenates the elements using "AND".
     * 
     * If <code>searchTerm</code> comprises of only one string,
     * no modification takes place
     * 
     * @param searchTerms
     * @return
     */
    public static String getQueryString(String searchTerms) {
        if (searchTerms == null || searchTerms.trim().length() == 0)
            return "*:*";

        List<String> keywordsList = new ArrayList<String>();

        // Sanitize the each keyword
        for (String keyword : searchTerms.split(",")) {
            if (searchTerms.trim().length() > 1) {
                keywordsList.add(keyword.trim());
            }
        }
        String[] keywordsArray = keywordsList.toArray(new String[keywordsList.size()]);

        return keywordsArray.length == 1 ? searchTerms : StringUtils.join(keywordsArray, " AND ");

    }
}