EDIT

// $Id$

/**

* Copyright (C) 2009 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.server;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.HashSet;

import java.util.List;

import java.util.Map;

import java.util.Set;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import org.apache.log4j.Logger;

import org.w3c.dom.Document;

import org.w3c.dom.NamedNodeMap;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.xml.sax.SAXException;

/**

 * @author a.kohlbecker

 * @date 30.03.2010

 *

 */

public class DataSourcePropertyParser {

    public static final Logger logger = Logger.getLogger(DataSourcePropertyParser.class);

    public static List<CdmInstanceProperties> parseDataSourceConfigs(File datasourcesFile){

        logger.info("loading bean definition file: " + datasourcesFile.getAbsolutePath());

        List<CdmInstanceProperties> configList = new ArrayList<CdmInstanceProperties>();

        Set<String> idSet = new HashSet<String>();

        try {

            DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();

            Document doc = builder.parse(datasourcesFile);

            NodeList beanNodes  = doc.getElementsByTagName("bean");

            for(int i=0; i < beanNodes.getLength(); i++){

                CdmInstanceProperties conf = new CdmInstanceProperties();

                Node beanNode = beanNodes.item(i);

                // ATTRIBUTE_DATASOURCE_NAME

                NamedNodeMap namedNodeMap = beanNode.getAttributes();

                String beanId = namedNodeMap.getNamedItem("id").getNodeValue();

                conf.setDataSourceName(beanId);

                // ATTRIBUTE_DATASOURCE_DRIVERCLASS

                String driverClass = getXMLNodeProperty(beanNode, "driverClass");

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

                    // not a data source bean

                    continue;

                }

                conf.setDriverClass(driverClass);

                conf.setUsername(getXMLNodeProperty(beanNode, "username"));

                if(conf.getUsername() == null){

                    conf.setUsername(getXMLNodeProperty(beanNode, "user"));

                }

                conf.setPassword(getXMLNodeProperty(beanNode, "password"));

                conf.setUrl(getXMLNodeProperty(beanNode, "url"));

                if(conf.getUrl() == null){

                    conf.setUrl(getXMLNodeProperty(beanNode, "jdbcUrl"));

                }

                if(idSet.add(conf.getDataSourceName())) {

                    logger.debug("adding instanceName '"+ conf.getDataSourceName() + "'");

                    configList.add(conf);

                } else {

                    logger.error("instance with name '"+ conf.getDataSourceName() + "' alreaddy exists");

                }

            }

        } catch (SAXException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (ParserConfigurationException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return configList;

    }

    private static String getXMLNodeProperty(Node beanNode, String name){

        NodeList children = beanNode.getChildNodes();

        for(int i=0; i < children.getLength(); i++){

            Node p = children.item(i);

            if(p.getNodeName().equals("property")

                    && p.getAttributes().getNamedItem("name").getNodeValue().equals(name)){

                return p.getAttributes().getNamedItem("value").getNodeValue();

            }

        }

        return null;

    }

}