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   *  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
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   *    https://www.apache.org/licenses/LICENSE-2.0
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  package org.apache.cayenne.modeler.editor;
  
  import org.apache.cayenne.configuration.event.QueryEvent;
  import org.apache.cayenne.map.DataMap;
  import org.apache.cayenne.map.ObjEntity;
  import org.apache.cayenne.map.QueryDescriptor;
  import org.apache.cayenne.modeler.Application;
  import org.apache.cayenne.modeler.ProjectController;
  import org.apache.cayenne.modeler.util.CellRenderers;
  import org.apache.cayenne.modeler.util.ProjectUtil;
  import org.apache.cayenne.modeler.util.TextAdapter;
  import org.apache.cayenne.modeler.util.combo.AutoCompletion;
  import org.apache.cayenne.util.Util;
  import org.apache.cayenne.validation.ValidationException;
  
  import javax.swing.*;
  
  abstract class BaseQueryMainTab extends JPanel {
      protected ProjectController mediator;
      protected TextAdapter name;
      protected JComboBox<ObjEntity> queryRoot;
  
      BaseQueryMainTab(ProjectController mediator) {
          this.mediator = mediator;
      }
  
      protected void initQueryRoot() {
          queryRoot = Application.getWidgetFactory().createComboBox();
          AutoCompletion.enable(queryRoot);
          queryRoot.setRenderer(CellRenderers.listRendererWithIcons());
  
          RootSelectionHandler rootHandler = new RootSelectionHandler(this);
  
          queryRoot.addActionListener(rootHandler);
          queryRoot.addFocusListener(rootHandler);
          queryRoot.getEditor().getEditorComponent().addFocusListener(rootHandler);
      }
  
      public TextAdapter getNameField() {
          return name;
      }
  
      public JComboBox<ObjEntity> getQueryRoot() {
          return queryRoot;
      }
  
      public ProjectController getMediator() {
          return mediator;
      }
  
      /**
       * Initializes Query name from string.
       */
      void setQueryName(String newName) {
          if (newName != null && newName.trim().length() == 0) {
              newName = null;
          }
  
          QueryDescriptor query = getQuery();
  
          if (query == null) {
              return;
          }
  
          if (Util.nullSafeEquals(newName, query.getName())) {
              return;
          }
  
          if (newName == null) {
              throw new ValidationException("SelectQuery name is required.");
          }
  
          DataMap map = mediator.getCurrentDataMap();
          QueryDescriptor matchingQuery = map.getQueryDescriptor(newName);
  
          if (matchingQuery == null) {
              // completely new name, set new name for entity
              QueryEvent e = new QueryEvent(this, query, query.getName());
              ProjectUtil.setQueryName(map, query, newName);
              mediator.fireQueryEvent(e);
          } else if (matchingQuery != query) {
              // there is a query with the same name
              throw new ValidationException("There is another query named '"
                      + newName
                      + "'. Use a different name.");
          }
      }
  
      abstract QueryDescriptor getQuery();
  }
  