/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

package org.netbeans.modules.j2ee.jboss4.config;

import java.io.File;
import java.io.IOException;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Set;
import org.netbeans.modules.j2ee.deployment.plugins.api.DatasourceManager;
import org.netbeans.modules.j2ee.deployment.plugins.api.InstanceProperties;
import org.netbeans.modules.j2ee.jboss4.config.gen.Datasources;
import org.netbeans.modules.j2ee.jboss4.config.gen.LocalTxDatasource;
import org.netbeans.modules.j2ee.jboss4.ide.ui.JBPluginProperties;
import org.openide.ErrorManager;
import org.openide.filesystems.FileObject;
import org.openide.filesystems.FileUtil;
import org.openide.util.NbBundle;

/**
 *
 * @author Libor Kotouc
 */
public final class JBossDatasourceManager implements DatasourceManager {
    
    private static final String DSdotXML = "-ds.xml"; // NOI18N
    
    // server's deploy dir
    private FileObject serverDir;
    
    public JBossDatasourceManager(String serverUrl) {
        String serverDirPath = InstanceProperties.getInstanceProperties(serverUrl).
                                        getProperty(JBPluginProperties.PROPERTY_DEPLOY_DIR);
        serverDir = FileUtil.toFileObject(new File(serverDirPath));
    }
    
    public Set getDatasources() {
        
        HashSet datasources = new HashSet();
        
        if (serverDir == null || !serverDir.isValid() || !serverDir.isFolder() || !serverDir.canRead()) {
            ErrorManager.getDefault().log(ErrorManager.USER, 
                    NbBundle.getMessage(JBossDatasourceManager.class, "ERR_WRONG_DEPLOY_DIR"));
            return datasources;
        }
        
        Enumeration files = serverDir.getChildren(true);
        LinkedList confs = new LinkedList();
        while (files.hasMoreElements()) { // searching for config files with DS
            FileObject file = (FileObject) files.nextElement();
            if (!file.isFolder() && file.getNameExt().endsWith(DSdotXML))
                confs.add(file);
        }
        
        if (confs.size() == 0) // nowhere to search
            return datasources;

        for (Iterator it = confs.iterator(); it.hasNext();) {
            try {
                FileObject dsFO = (FileObject)it.next();
                File dsFile = FileUtil.toFile(dsFO);
                Datasources ds = Datasources.createGraph(dsFile);
                LocalTxDatasource ltxds[] = ds.getLocalTxDatasource();
                for (int i = 0; i < ltxds.length; i++) {
                    if (ltxds[i].getJndiName().length() > 0) {
                        datasources.add(new JBossDatasource(
                                    ltxds[i].getJndiName(),
                                    ltxds[i].getConnectionUrl(),
                                    ltxds[i].getUserName(),
                                    ltxds[i].getPassword(),
                                    ltxds[i].getDriverClass()));
                    }
                }
            } catch (IOException ioe) {
                ErrorManager.getDefault().notify(ioe);
            } catch (RuntimeException re) {
                // -ds.xml is not parseable, do nothing
            }
        }
        
        return datasources;
    }
    
}