EDIT

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.io.common;

import java.util.HashMap;

import java.util.Map;

import org.apache.log4j.Logger;

import org.springframework.beans.BeansException;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ApplicationContextAware;

import org.springframework.stereotype.Component;

import eu.etaxonomy.cdm.api.service.IService;

import eu.etaxonomy.cdm.io.common.events.IIoObserver;

import eu.etaxonomy.cdm.model.agent.Person;

import eu.etaxonomy.cdm.model.agent.TeamOrPersonBase;

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.cdm.model.name.TaxonNameBase;

import eu.etaxonomy.cdm.model.occurrence.Specimen;

import eu.etaxonomy.cdm.model.reference.Reference;

import eu.etaxonomy.cdm.model.taxon.TaxonBase;

/**

 * @author a.mueller

 * @created 20.06.2008

 * @version 1.0

 */

@Component("defaultImport")

public class CdmApplicationAwareDefaultImport<T extends IImportConfigurator> implements ICdmImporter<T>, ApplicationContextAware {

	private static final Logger logger = Logger.getLogger(CdmApplicationAwareDefaultImport.class);

	protected ApplicationContext applicationContext;

	/* (non-Javadoc)

	 * @see org.springframework.context.ApplicationContextAware#setApplicationContext(org.springframework.context.ApplicationContext)

	 */

	public void setApplicationContext(ApplicationContext applicationContext)

			throws BeansException {

		this.applicationContext = applicationContext;

	}

	//Constants

	final boolean OBLIGATORY = true; 

	final boolean FACULTATIVE = false; 

	final int modCount = 1000;

	IService<CdmBase> service = null;

	//different type of stores that are used by the known imports

	Map<String, MapWrapper<? extends CdmBase>> stores = new HashMap<String, MapWrapper<? extends CdmBase>>();

	public CdmApplicationAwareDefaultImport(){

		stores.put(ICdmIO.PERSON_STORE, new MapWrapper<Person>(service));

		stores.put(ICdmIO.TEAM_STORE, new MapWrapper<TeamOrPersonBase<?>>(service));

		stores.put(ICdmIO.REFERENCE_STORE, new MapWrapper<Reference>(service));

		stores.put(ICdmIO.NOMREF_STORE, new MapWrapper<Reference>(service));

		stores.put(ICdmIO.NOMREF_DETAIL_STORE, new MapWrapper<Reference>(service));

		stores.put(ICdmIO.REF_DETAIL_STORE, new MapWrapper<Reference>(service));

		stores.put(ICdmIO.TAXONNAME_STORE, new MapWrapper<TaxonNameBase<?,?>>(service));

		stores.put(ICdmIO.TAXON_STORE, new MapWrapper<TaxonBase>(service));

		stores.put(ICdmIO.SPECIMEN_STORE, new MapWrapper<Specimen>(service));

	}

	public boolean invoke(IImportConfigurator config){

		if (config.getCheck().equals(IImportConfigurator.CHECK.CHECK_ONLY)){

			return doCheck(config);

		}else if (config.getCheck().equals(IImportConfigurator.CHECK.CHECK_AND_IMPORT)){

			doCheck(config);

			return doImport(config);

		}else if (config.getCheck().equals(IImportConfigurator.CHECK.IMPORT_WITHOUT_CHECK)){

			return doImport(config);

		}else{

			logger.error("Unknown CHECK type");

			return false;

		}

	}

	@SuppressWarnings("unchecked")

	protected <S extends IImportConfigurator> boolean doCheck(S  config){

		boolean result = true;

		//check

		if (config == null){

			logger.warn("CdmImportConfiguration is null");

			return false;

		}

		System.out.println("Start checking Source ("+ config.getSourceNameString() + ") ...");

		if (! config.isValid()){

			logger.warn("CdmImportConfiguration is not valid");

			return false;

		}

		ImportStateBase state = config.getNewState();

		state.initialize(config);

		//do check for each class

		for (Class<ICdmIO> ioClass: config.getIoClassList()){

			try {

				String ioBeanName = getComponentBeanName(ioClass);

				ICdmIO cdmIo = (ICdmIO)applicationContext.getBean(ioBeanName, ICdmIO.class);

				if (cdmIo != null){

					registerObservers(config, cdmIo);

					state.setCurrentIO(cdmIo);

					result &= cdmIo.check(state);

					unRegisterObservers(config, cdmIo);

				}else{

					logger.error("cdmIO was null");

					result = false;

				}

			} catch (Exception e) {

					logger.error(e);

					e.printStackTrace();

					result = false;

			}

		}

		//return

		System.out.println("End checking Source ("+ config.getSourceNameString() + ") for import to Cdm");

		return result;

	}

	private void registerObservers(IImportConfigurator config, ICdmIO io){

		for (IIoObserver observer : config.getObservers()){

			io.addObserver(observer);

		}

	}

	private void unRegisterObservers(IImportConfigurator config, ICdmIO io){

		for (IIoObserver observer : config.getObservers()){

			io.deleteObserver(observer);

		}

	}

	/**

	 * Executes the whole 

	 */

	protected <S extends IImportConfigurator>  boolean doImport(S config){

		boolean result = true;

		//validate

		if (config == null){

			logger.warn("Configuration is null");

			return false;

		}else if (! config.isValid()){

			logger.warn("Configuration is not valid");

			return false;

		}

		Reference sourceReference = config.getSourceReference();

		logger.info("Start import from Source '"+ config.getSourceNameString() + "' to destination '" + config.getDestinationNameString() + "'");

		ImportStateBase state = config.getNewState();

		state.initialize(config);

		state.setSuccess(true);

		//do invoke for each class

		for (Class<ICdmIO> ioClass: config.getIoClassList()){

			try {

				String ioBeanName = getComponentBeanName(ioClass);

				ICdmIO cdmIo = (ICdmIO)applicationContext.getBean(ioBeanName, ICdmIO.class);

				if (cdmIo != null){

					registerObservers(config, cdmIo);

					state.setCurrentIO(cdmIo);

					result &= cdmIo.invoke(state);

					unRegisterObservers(config, cdmIo);

				}else{

					logger.error("cdmIO was null");

					result = false;

				}

			} catch (Exception e) {

					logger.error(e);

					e.printStackTrace();

					result = false;

			}

		}

		//do invoke for each class

//		for (String ioBean: config.getIoBeans()){

//			try {

//				ICdmIO<S> cdmIo = (ICdmIO<S>)applicationContext.getBean(ioBean, ICdmIO.class);

//				if (cdmIo != null){

//					result &= cdmIo.invoke(config, stores);

//				}else{

//					logger.error("cdmIO was null");

//					result = false;

//				}

//			} catch (Exception e) {

//					logger.error(e);

//					e.printStackTrace();

//					result = false;

//			}

//			

//		}

		logger.info("End import from source '" + config.getSourceNameString() 

				+ "' to destination '" + config.getDestinationNameString() + "'"+

				(result? "(successful)":"(with errors)")) ;

		return result;

	}

	/**

	 * Returns the name of a component bean. If the name is defined in the Component annotation this name is returned.

	 * Otherwise the class name is returned with starting lower case.

	 * @param ioClass

	 * @return

	 * @throws IllegalArgumentException if the class does not have a "Component" annotation

	 */

	public static String getComponentBeanName(Class<ICdmIO> ioClass) throws IllegalArgumentException {

		Component component = ioClass.getAnnotation(Component.class);

		if (component == null){

			throw new IllegalArgumentException("Class " + ioClass.getName() + " is missing a @Component annotation." );

		}

		String ioBean = component.value();

		if ("".equals(ioBean)){

			ioBean = ioClass.getSimpleName();

			ioBean = ioBean.substring(0, 1).toLowerCase() + ioBean.substring(1); //make camelcase

		}

		return ioBean;

	}

}