package migratool.definition.parser;
   
   import java.io.IOException;
   import java.io.Reader;
   
   import migratool.model.BDdescription;
   import migratool.model.BDdescriptionFactoryIF;
   import migratool.model.SuperBeanFactory;
   
  import org.jdom.Attribute;
  import org.jdom.Document;
  import org.jdom.Element;
  import org.jdom.JDOMException;
  import org.jdom.input.SAXBuilder;
  
  
  /**
   * 
   * MIGRATOOL Program to migrate spatial databsets.
   * Copyright (C) 2007 Fábio Luiz Leite Júnior
   * Universidade Federal de Campina Grande
   * contact: fabioleite@gmail.com
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version 2
   * 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
   *
   * @author fabio
   *
   * Classe que encapsula as várias definições de fonte de dados origem e destino
   */
   
  public class MigParser {
  	
  	/**
  	 * L� as defini��es de fontes de dados e instancia as defini��es(beans).
  	 * @param reader Reader utilizado para ler o arquivo da defini��o de mapa
  	 * @return defini��o de mapa contida no arquivo
  	 */	
  	public MigBean getMigDefinition(Reader reader) throws ParserException{
  		//Criando os elementos XML
  		SAXBuilder builder = new SAXBuilder();
  		Document docInput = null;
  		try {
  			try {
  				docInput = builder.build(reader);
  			} catch (IOException e) {
  				// TODO Auto-generated catch block
  				e.printStackTrace();
  			}
  		} catch (JDOMException e) {
  
  			throw new ParserException("Problemas com o parser: ",
  										e.getCause());
  		}
  	
  		return createMigBean(docInput.getRootElement());
  	}
  
  	/**
  	 * @param element
  	 */
  	private MigBean createMigBean(Element root) {
  		
  		Element migEl = root;
  		MigBean mig = new MigBean();
  		
  		mig.setDataSourceFactoryType((migEl.getAttribute("dataSourceFactoryType")).getValue());
  		
  		Element BDdefinitionSourceEl =  migEl.getChild("fromDataSource");
  		mig.setSource(createBDdefinitionSource(BDdefinitionSourceEl));
  		
  		Element BDdefinitionDestinationEl =  migEl.getChild("destinationDataSource");
  		mig.setDestination(createBDdefinitionDestination(BDdefinitionDestinationEl));
  		
  		return mig;
  		
  	}
  	
  	/**
  	 * Cria uma defini��o de banco de dados destino a partir dos dados do xml
  	 * @param BDdefinitionDestinationEl
  	 * @return
  	 */
  	private BDdescription createBDdefinitionDestination(Element BDdefinitionDestinationEl) {
  		//	pensar nessa cria��o de objetos se vale apena as factories, pois as descri��es mudam
  		BDdescriptionFactoryIF beanFactory = 
  			SuperBeanFactory.getInstance(
  					BDdefinitionDestinationEl.getAttribute("beanFactory").getValue());
 		BDdescription bDescription = beanFactory.getBDdescription();
 		
 		bDescription.setName(BDdefinitionDestinationEl.getAttribute("name").getValue());
 		bDescription.setBeanFactory(BDdefinitionDestinationEl.getAttribute("beanFactory").getValue());
 					
 		Element BDdefinitionSourceLoactionEl = BDdefinitionDestinationEl.getChild("location");
 		
 		Attribute user = BDdefinitionSourceLoactionEl.getAttribute("user");
 		if (user != null){
 			bDescription.setUser(user.getValue());
 		}
 		
 		Attribute password = BDdefinitionSourceLoactionEl.getAttribute("password");
 		if (password != null){
 			bDescription.setPassword(password.getValue());
 		}
 		
 		Attribute url = BDdefinitionSourceLoactionEl.getAttribute("url");
 		if (url != null){
 			bDescription.setUrl(url.getValue());
 		}
 		
 		Attribute driver = BDdefinitionSourceLoactionEl.getAttribute("driver");
 		if (driver!= null){
 			bDescription.setDriver(driver.getValue());
 		}
 
 		bDescription.setTableName(BDdefinitionSourceLoactionEl.getAttribute("tableName").getValue());
 		
 		Attribute positionGeometryFieldAT = BDdefinitionSourceLoactionEl.getAttribute("positionGeometryField");
 		if(positionGeometryFieldAT != null){
 			String positionGeometryField = positionGeometryFieldAT.getValue();
 			if(positionGeometryField != null){
 				bDescription.setPositionGeometryField(positionGeometryField);
 			}
 		}	
 		return bDescription;
 	}
 
 	/**
 	 * Cria uma defini��o de banco de dados fonte a partir dos dados do xml
 	 * @param BDdefinitionSourceEl
 	 * @return
 	 */
 	private BDdescription createBDdefinitionSource(Element BDdefinitionSourceEl){
 		//	pensar nessa cria��o de objetos se vale apena as factories, pois as descri��es mudam
 		BDdescriptionFactoryIF beanFactory = SuperBeanFactory.getInstance(BDdefinitionSourceEl.getAttribute("beanFactory").getValue());
 		BDdescription bDescription = beanFactory.getBDdescription();
 		
 		bDescription.setName(BDdefinitionSourceEl.getAttribute("name").getValue());
 		bDescription.setBeanFactory(BDdefinitionSourceEl.getAttribute("beanFactory").getValue());
 					
 		Element BDdefinitionSourceLoactionEl = BDdefinitionSourceEl.getChild("location");
 		bDescription.setUser(BDdefinitionSourceLoactionEl.getAttribute("user").getValue());
 		bDescription.setPassword(BDdefinitionSourceLoactionEl.getAttribute("password").getValue());	
 		bDescription.setUrl(BDdefinitionSourceLoactionEl.getAttribute("url").getValue());
 		bDescription.setDriver(BDdefinitionSourceLoactionEl.getAttribute("driver").getValue());
 		bDescription.setTableName(BDdefinitionSourceLoactionEl.getAttribute("tableName").getValue());
 				
 		return bDescription;
 	}
 
 
 }