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/**
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.geronimo.converter.jboss;

import java.io.Reader;
import java.io.IOException;
import java.util.List;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.geronimo.converter.DatabaseConversionStatus;
import org.apache.geronimo.converter.JDBCPool;
import org.apache.geronimo.converter.XADatabasePool;
import org.apache.geronimo.converter.AbstractDatabasePool;
import org.apache.geronimo.converter.DOMUtils;
import org.apache.geronimo.kernel.util.XmlUtil;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

/**
 * Converts database pools from JBoss 4 to Geronimo
 *
 * @version $Rev: 476049 $ $Date: 2006-11-17 12:35:17 +0800 (Fri, 17 Nov 2006) $
 */
public class JBoss4DatabaseConverter extends DOMUtils {
    public static DatabaseConversionStatus convert(Reader dsXml) throws IOException {
        List status = new ArrayList();
        List noTx = new ArrayList();
        List local = new ArrayList();
        List xa = new ArrayList();

        DocumentBuilderFactory factory = XmlUtil.newDocumentBuilderFactory();
        factory.setValidating(false);
        try {
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document doc = builder.parse(new InputSource(dsXml));
            dsXml.close();
            parseDocument(doc, status, noTx, local, xa);
        } catch (ParserConfigurationException e) {
            throw (IOException)new IOException().initCause(e);
        } catch (SAXException e) {
            throw (IOException)new IOException().initCause(e);
        }

        DatabaseConversionStatus result = new DatabaseConversionStatus();
        result.setMessages((String[]) status.toArray(new String[status.size()]));
        result.setNoTXPools((JDBCPool[]) noTx.toArray(new JDBCPool[noTx.size()]));
        result.setJdbcPools((JDBCPool[]) local.toArray(new JDBCPool[noTx.size()]));
        result.setXaPools((XADatabasePool[]) xa.toArray(new XADatabasePool[xa.size()]));
        return result;
    }

    private static void parseDocument(Document doc, List status, List noTx, List local, List xa) {
        Element datasources = doc.getDocumentElement();
        if(!datasources.getNodeName().equalsIgnoreCase("datasources")) {
            if(datasources.getNodeName().equals("connection-factories")) {
                status.add("ERROR: Geronimo cannot parse a JBoss data source configured using conection-factories.  This typically means a custom RAR file is required.");
                return;
            } else {
                status.add("ERROR: Unrecognized file beginning with "+datasources.getNodeName()+" element.  Expected a JBoss *-ds.xml file.");
                return;
            }
        }
        NodeList list = datasources.getChildNodes();
        for(int i=0; i -1) {
            status.add("NOTE: pool will use name '"+pool.getJndiName()+"' though Geronimo doesn't put it in JNDI");
        }
        String test = getChildText(root, "min-pool-size");
        if(test != null && !test.equals("")) pool.setMinSize(new Integer(test));
        test = getChildText(root, "max-pool-size");
        if(test != null && !test.equals("")) pool.setMaxSize(new Integer(test));
        test = getChildText(root, "blocking-timeout-millis");
        if(test != null && !test.equals("")) pool.setBlockingTimeoutMillis(new Integer(test));
        test = getChildText(root, "idle-timeout-minutes");
        if(test != null && !test.equals("")) pool.setIdleTimeoutMillis(new Integer(Integer.parseInt(test)*60*1000));
        pool.setNewConnectionSQL(getChildText(root, "new-connection-sql"));
        pool.setTestConnectionSQL(getChildText(root, "check-valid-connection-sql"));
        String sorter = getChildText(root, "exception-sorter-class-name");
        if(sorter != null) {
            if(sorter.indexOf("Oracle") > -1) pool.setVendor(AbstractDatabasePool.VENDOR_ORACLE);
            if(sorter.indexOf("MySQL") > -1) pool.setVendor(AbstractDatabasePool.VENDOR_MYSQL);
            if(sorter.indexOf("Sybase") > -1) pool.setVendor(AbstractDatabasePool.VENDOR_SYBASE);
            if(sorter.indexOf("Informix") > -1) pool.setVendor(AbstractDatabasePool.VENDOR_INFORMIX);
        }
        test = getChildText(root, "prepared-statement-cache-size");
        if(test != null && !test.equals("")) pool.setStatementCacheSize(new Integer(test));
    }

    private static void addJDBCDataSource(Element root, List status, List results) {
        JDBCPool pool = new JDBCPool();
        addDataSourceCommon(root, pool, status);
        pool.setJdbcURL(getChildText(root, "connection-url"));
        pool.setDriverClass(getChildText(root, "driver-class"));
        NodeList list = root.getElementsByTagName("connection-property");
        for(int i=0; i