content: // This file is part of AceWiki.
  // Copyright 2008-2013, AceWiki developers.
  // 
  // AceWiki 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.
  // 
  // AceWiki 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 AceWiki. If
  // not, see http://www.gnu.org/licenses/.
  
  package ch.uzh.ifi.attempto.acewiki.core;
  
  import ch.uzh.ifi.attempto.base.TextOperator;
  
  /**
   * This class represents a statement that can be either an ACE sentence or a comment. A
   * statement can either be part of an article or it can be an independent statement that has no
   * article.
   * 
   * @author Tobias Kuhn
   */
  public abstract class AbstractStatement implements Statement {
  	
  	private Ontology ontology;
  	private Article article;
  	
  	/**
  	 * Initializes a new independent statement.
  	 */
  	protected AbstractStatement() {
  	}
  	
  	public void init(Ontology ontology, Article article) {
  		this.ontology = ontology;
  		this.article = article;
  	}
  	
  	public Ontology getOntology() {
  		return ontology;
  	}
  	
  	public Article getArticle() {
  		return article;
  	}
  	
  	public String toString() {
  		return getText(getDefaultLanguage());
  	}
  	
  	/**
  	 * Returns the AceWiki engine.
  	 * 
  	 * @return The engine.
  	 */
  	protected AceWikiEngine getEngine() {
  		return getOntology().getEngine();
  	}
  	
  	/**
  	 * Returns the default language.
  	 * 
  	 * @return The default language.
  	 */
  	protected String getDefaultLanguage() {
  		return getEngine().getLanguages()[0];
  	}
  	
  	/**
  	 * Returns the language handler for the given language.
  	 * 
  	 * @param language The language.
  	 * @return The language handler.
  	 */
  	protected LanguageHandler getLanguageHandler(String language) {
  		return getEngine().getLanguageHandler(language);
  	}
  	
  	/**
  	 * Returns the text operator for the given language.
  	 * 
  	 * @param language The language.
  	 * @return The text operator.
  	 */
  	protected TextOperator getTextOperator(String language) {
  		return getLanguageHandler(language).getTextOperator();
  	}
  
  }
  