/* This file is part of the Joshua Machine Translation System.
*
* Joshua 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 2.1
* of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
package joshua.decoder.ff.tm;
import joshua.corpus.Phrase;
import joshua.decoder.ff.tm.Grammar;
/**
* Factory capable of getting a grammar for use in translating a
* sentence.
* <p>
* Developers interested in implementing a new type of grammar must:
* <ol>
* <li>Implement <code>GrammarFactory</code>
* <li>Implement <code>Grammar</code>
* <li>Implement <code>TrieGrammar</code>
* <li>Implement <code>RuleCollection</code>
* </ol>
*
* Also, attention should be directed to the <code>Rule</code>
* class.
*
* @author Lane Schwartz
* @version $LastChangedDate: 2009-05-26 12:20:05 -0500 (Tue, 26 May 2009) $
*/
public interface GrammarFactory {
/**
* Returns a grammar which is adapted to the specified
* sentence. Depending on the implementation this grammar
* may be generated online, partially loaded from disk,
* remain unchanged etc.
*
* @param sentence A sentence to be translated
*
* @return A grammar that represents a set of translation
* rules, relevant for translating (at least) the given sentence.
*/
Grammar getGrammarForSentence(Phrase sentence);
}