EDIT

/**

* Copyright (C) 2014 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.taxeditor.remoting.source;

import static eu.etaxonomy.cdm.common.XmlHelp.getBeansRoot;

import static eu.etaxonomy.cdm.common.XmlHelp.insertXmlBean;

import static eu.etaxonomy.cdm.common.XmlHelp.insertXmlValueProperty;

import static eu.etaxonomy.cdm.common.XmlHelp.saveToXml;

import java.util.ArrayList;

import java.util.Enumeration;

import java.util.List;

import java.util.Properties;

import org.apache.log4j.Logger;

import org.jdom.Attribute;

import org.jdom.Element;

import eu.etaxonomy.cdm.common.CdmUtils;

import eu.etaxonomy.cdm.common.XmlHelp;

import eu.etaxonomy.cdm.config.CdmPersistentSourceUtils;

import eu.etaxonomy.cdm.config.CdmPersistentXMLSource;

import eu.etaxonomy.cdm.config.CdmPersistentXMLSource.CdmSourceProperties;

import eu.etaxonomy.cdm.config.ICdmPersistentSource;

/**

 * Class representing a CDM remote source which can be persisted to a source config file

 */

public class CdmPersistentRemoteSource

        extends CdmRemoteSource

        implements ICdmPersistentSource{

    @SuppressWarnings("unused")

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

	public static final String REMOTESOURCE_BEAN_POSTFIX = "RemoteSource";

	private String beanName;

	private Properties cdmSourceProperties;

	private List<Attribute> cdmSourceAttributes;

	/**

	 * Creates a new instance of CdmPersistentRemoteSource

	 *

	 * @param name

	 * @param server

	 * @param port

	 * @param contextPath

	 * @param nomenclaturalCode

	 * @return

	 * @throws CdmRemoteSourceException

	 */

	public static CdmPersistentRemoteSource NewInstance(String remoteSource) throws CdmRemoteSourceException {

		if(exists(remoteSource)) {

			return new CdmPersistentRemoteSource(remoteSource);

		} else {

			throw new CdmRemoteSourceException("Remote source '" + remoteSource + "' does not exist in sources setting file");

		}

	}

	/**S

	 * Creates a new CdmPersistentRemoteSource

	 *

	 * @param name

	 * @param server

	 * @param port

	 * @param contextPath

	 * @param nomenclaturalCode

	 * @throws CdmRemoteSourceException

	 */

	private CdmPersistentRemoteSource(String remoteSource) throws CdmRemoteSourceException {

	    super(DEFAULT_NAME, DEFAULT_SERVER, DEFAULT_PORT, DEFAULT_CONTEXT_PATH);

		CdmPersistentXMLSource cdmPersistentXMLSource = CdmPersistentXMLSource.NewInstance(remoteSource, REMOTESOURCE_BEAN_POSTFIX);

		if(cdmPersistentXMLSource.getElement() != null) {

			beanName = cdmPersistentXMLSource.getBeanName();

			// properties from the persistent xml file

			cdmSourceProperties = cdmPersistentXMLSource.getCdmSourceProperties();

			cdmSourceAttributes = cdmPersistentXMLSource.getCdmSourceAttributes();

			checkProperties(cdmSourceProperties);

		} else {

			throw new CdmRemoteSourceException("Remote source '" + remoteSource + "' does not exist in settings file");

		}

	}

	private static void checkProperties(Properties cdmSourceProperties) throws CdmRemoteSourceException {

		if(!cdmSourceProperties.containsKey(CdmSourceProperties.SERVER.toString())) {

			throw new CdmRemoteSourceException("Could not initialise remote source. Required property '" + CdmSourceProperties.SERVER.toString() + "' is missing");

		}

		String port = (String)cdmSourceProperties.get(CdmSourceProperties.PORT.toString());

		if(port == null || port.isEmpty()) {

			throw new CdmRemoteSourceException("Could not initialise remote source. Required property '" + CdmSourceProperties.SERVER.toString() + "' is missing");

		}

		if(!cdmSourceProperties.containsKey(CdmSourceProperties.CONTEXTPATH.toString())) {

			throw new CdmRemoteSourceException("Could not initialise remote source. Required property '" + CdmSourceProperties.SERVER.toString() + "' is missing");

		}

	}

	@Override

	public String getBeanName() {

		return beanName;

	}

	@Override

	public String getServer() {

		return cdmSourceProperties.getProperty(CdmSourceProperties.SERVER.toString());

	}

	@Override

	public int getPort() {

		String port = CdmUtils.Nz(cdmSourceProperties.getProperty(CdmSourceProperties.PORT.toString()));

		if (port == null || "".equals(port)){

			return -1;

		}else{

			//TODO exception if non integer

			return Integer.valueOf(port);

		}

	}

	@Override

	public String getContextPath() {

		return cdmSourceProperties.getProperty(CdmSourceProperties.CONTEXTPATH.toString());

	}

	public static CdmPersistentRemoteSource save(String strRemoteSourceName, CdmRemoteSource remoteSource) throws CdmRemoteSourceException {

		Properties cdmSourceProperties = new Properties();

		cdmSourceProperties.put(CdmSourceProperties.SERVER.toString(), remoteSource.getServer());

		cdmSourceProperties.put(CdmSourceProperties.PORT.toString(), String.valueOf(remoteSource.getPort()));

		cdmSourceProperties.put(CdmSourceProperties.CONTEXTPATH.toString(), remoteSource.getContextPath());

		checkProperties(cdmSourceProperties);

		return save(strRemoteSourceName, cdmSourceProperties);

	}

	private static CdmPersistentRemoteSource save(String strRemoteSourceName,Properties cdmSourceProperties) throws CdmRemoteSourceException {

		//root

		Element root = getBeansRoot(CdmPersistentSourceUtils.getCdmSourceInputStream());

		if (root == null){

			return null;

		}

		//bean

		Element bean = XmlHelp.getFirstAttributedChild(root, "bean", "id", CdmPersistentSourceUtils.getBeanName(strRemoteSourceName, REMOTESOURCE_BEAN_POSTFIX));

		if (bean != null){

			bean.detach();  //delete old version if necessary

		}

		bean = insertXmlBean(root, CdmPersistentSourceUtils.getBeanName(strRemoteSourceName, REMOTESOURCE_BEAN_POSTFIX), CdmPersistentRemoteSource.class.getName());

		Properties props = cdmSourceProperties;

		Enumeration<?> e = props.propertyNames();

		while (e.hasMoreElements()) {

			String key = (String) e.nextElement();

			insertXmlValueProperty(bean, key, props.getProperty(key));

		}

		//save

		saveToXml(root.getDocument(),

				CdmPersistentSourceUtils.getResourceDirectory(),

				CdmPersistentXMLSource.CDMSOURCE_FILE_NAME,

				XmlHelp.prettyFormat );

		return NewInstance(strRemoteSourceName) ;

	}

	/**

	 * @param strDataSourceName

	 * @param dataSource

	 * @param code

	 * @return

	 * 			the updated dataSource, null if not succesful

	 */

	public static CdmPersistentRemoteSource update(String strRemoteSourceName,

			CdmRemoteSource remoteSource) throws CdmRemoteSourceException {

		CdmPersistentSourceUtils.delete(CdmPersistentSourceUtils.getBeanName(strRemoteSourceName,REMOTESOURCE_BEAN_POSTFIX));

		return save(strRemoteSourceName, remoteSource);

	}

	/**

	 * Tests existing of the datsource in the according config  file.

	 * @return true if a datasource with the given name exists in the according datasource config file.

	 */

	public static boolean exists(String strRemoteSourceName){

		Element bean = CdmPersistentSourceUtils.getCdmSourceBeanXml(strRemoteSourceName, REMOTESOURCE_BEAN_POSTFIX);

		return (bean != null);

	}

	/**

	 * Returns a list of all datasources stored in the datasource config file

	 * @return all existing data sources

	 * @throws CdmRemoteSourceException

	 */

	@SuppressWarnings("unchecked")

	static public List<CdmPersistentRemoteSource> getAllRemoteSources() throws CdmRemoteSourceException{

		List<CdmPersistentRemoteSource> remoteSources = new ArrayList<CdmPersistentRemoteSource>();

		Element root = getBeansRoot(CdmPersistentSourceUtils.getCdmSourceInputStream());

		if (root == null){

			return null;

		}else{

	    	List<Element> lsChildren  = root.getChildren("bean", root.getNamespace());

	    	for (Element elBean : lsChildren){

	    		String strId = elBean.getAttributeValue("id");

	    		if (strId != null && strId.endsWith(REMOTESOURCE_BEAN_POSTFIX)){

	    			strId = strId.replace(REMOTESOURCE_BEAN_POSTFIX, "");

	    			remoteSources.add(new CdmPersistentRemoteSource(strId));

	    		}

	    	}

		}

		return remoteSources;

	}

	@Override

	public String toString(){

		if (getName() != null){

			return getName();

		}else{

			return super.toString();

		}

	}

}