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  package org.apache.cayenne.modeler.graph;
  
  import javax.swing.event.UndoableEditListener;
  
  import org.apache.cayenne.configuration.DataChannelDescriptor;
  import org.apache.cayenne.map.Attribute;
  import org.apache.cayenne.map.Entity;
  import org.apache.cayenne.map.Relationship;
  import org.apache.cayenne.modeler.ProjectController;
  import org.apache.cayenne.util.XMLSerializable;
  import org.jgraph.JGraph;
  import org.jgraph.graph.DefaultGraphCell;
  
  /**
   * Interface for building graphs which represent some perspective of a domain
   */
  public interface GraphBuilder<E extends Entity<E, A, R>, A extends Attribute<E, A, R>, R extends Relationship<E, A, R>> extends XMLSerializable, UndoableEditListener {
  
      double ZOOM_FACTOR = 1.3;
      
      /**
       * Builds graph
       */
      void buildGraph(ProjectController mediator, DataChannelDescriptor domain, boolean layout);
      
      /**
       * Invoked at destroying of the builder
       */
      void destroy();
      
      /**
       * Returns built graph for this builder
       */
      JGraph getGraph();
      
      /**
       * Returns domain.
       */
      DataChannelDescriptor getDataDomain();
          
      /**
       * Returns type of the graph
       */
      GraphType getType();
      
      /**
       * Returns selected entity, <code>null</code> if none is selected
       */
      Entity<E,A,R> getSelectedEntity();
      
      /**
       * Returns cell of an entity
       */
      DefaultGraphCell getEntityCell(String entityName);
  }
  