KeywordTerm.java

/**
 * Copyright 1999-2009 The Pegadi Team
 *
 * 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.pegadi.articlesearch;

import org.pegadi.sqlsearch.SearchTerm;

import java.util.Arrays;
import java.util.List;

/**
 * This class implements a search based on the text of an article.
 *
 * @author Eirik Bjorsnos <bjorsnos@underdusken.no>
 * @version $Revision$, $Date$
 */
public class KeywordTerm extends SearchTerm implements java.io.Serializable {

    /**
     * The keyword pattern to search for
     */
    private String pattern;

    /**
     * Constructor taking a pattern as argument
     *
     * @param pattern the pattern to search for
     */
    public KeywordTerm(String pattern) {
        this.pattern = pattern;
    }

    /**
     * Returns the WHERE-clause
     *
     * @return WHERE-clause
     */
    public String whereClause() {
        // FIXME: Is regexp actually in the SQL standard?
        // mSQL uses 'rlike' instead of 'regexp'...
        return "Article.text regexp '<keywords>.*" + pattern + ".*</keywords>'";
    }

    /**
     * Returns the names of the tables involved in this search.
     *
     * @return A String[] containing the involved tables.
     */
    public List<String> getTables() {
        return Arrays.asList("Article");
    }
}