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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 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.cayenne.modeler.action;
 import  org.apache.cayenne.access.DataNode;
 import  org.apache.cayenne.conf.DriverDataSourceFactory;
 import  org.apache.cayenne.project.ProjectDataSource;

 public abstract class DBWizardAction extends CayenneAction {
     public DBWizardAction(String nameApplication application) {
     // ==== Guessing user preferences... *****
     protected DataNode getPreferredNode() {
         ProjectController projectController = getProjectController();
         DataNode node = projectController.getCurrentDataNode();
         // try a node that belongs to the current DataMap ...
         if (node == null) {
             DataMap map = projectController.getCurrentDataMap();
             if (map != null) {
                 node = projectController.getCurrentDataDomain().lookupDataNode(map);
         return node;
     protected String preferredDataSourceLabel(DBConnectionInfo nodeInfo) {
         if (nodeInfo == null || nodeInfo.getDomainPreference() == null) {
             // only driver nodes have meaningful connection info set
             DataNode node = getPreferredNode();
             return (node != null && DriverDataSourceFactory.class.getName().equals(
                     node.getDataSourceFactory())) ? "DataNode Connection Info" : null;
         return nodeInfo.getKey();

Determines the most reasonable default DataSource choice.
     protected DBConnectionInfo preferredDataSource() {
         DataNode node = getPreferredNode();
         // no current node...
         if (node == null) {
             return null;
         // if node has local DS set, use it
         DataNodeDefaults nodeDefaults = (DataNodeDefaultsgetProjectController()
                 .getDetail(node.getName(), DataNodeDefaults.classfalse);
         String key = (nodeDefaults != null) ? nodeDefaults.getLocalDataSource() : null;
         if (key != null) {
             DBConnectionInfo info = (DBConnectionInfogetApplication()
             if (info != null) {
                 return info;
         // extract data from the node
         if (!DriverDataSourceFactory.class.getName().equals(node.getDataSourceFactory())) {
             return null;
        // create transient object..
        DBConnectionInfo nodeInfo = new DBConnectionInfo();
        nodeInfo.copyFrom(((ProjectDataSource) node.getDataSource()).getDataSourceInfo());
        if (node.getAdapter() instanceof ModelerDbAdapter) {
        return nodeInfo;
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