package org.argeo.connect.ui.util;
   
   import javax.jcr.Node;
   import javax.jcr.query.Row;
   
   import org.argeo.connect.ui.SystemWorkbenchService;
   import org.argeo.connect.util.ConnectJcrUtils;
   import org.argeo.eclipse.ui.EclipseUiUtils;
   import org.eclipse.jface.viewers.DoubleClickEvent;
  import org.eclipse.jface.viewers.IDoubleClickListener;
  import org.eclipse.jface.viewers.IStructuredSelection;
  
  /**
   * Canonical double-click listener for a viewer that displays JCR Rows or Nodes.
   * Calls the OpenEditor command retrieved via the AppWorkbenchService
   */
  public class JcrViewerDClickListener implements IDoubleClickListener {
  
  	private String selectorName;
  	private SystemWorkbenchService systemWorkbenchService;
  
  	public JcrViewerDClickListener() {
  	}
  
  	public JcrViewerDClickListener(String selectorName) {
  		if (EclipseUiUtils.notEmpty(selectorName))
  			this.selectorName = selectorName;
  	}
  
  	public JcrViewerDClickListener(String selectorName, SystemWorkbenchService systemWorkbenchService) {
  		if (EclipseUiUtils.notEmpty(selectorName))
  			this.selectorName = selectorName;
  		this.systemWorkbenchService = systemWorkbenchService;
  	}
  
  	public JcrViewerDClickListener(SystemWorkbenchService systemWorkbenchService) {
  		selectorName = null;
  		this.systemWorkbenchService = systemWorkbenchService;
  	}
  
  	public void doubleClick(DoubleClickEvent event) {
  		if (event.getSelection() == null || event.getSelection().isEmpty())
  			return;
  		Object obj = ((IStructuredSelection) event.getSelection()).getFirstElement();
  		Node currNode = null;
  		// try {
  		if (obj instanceof Row || obj instanceof Node)
  			currNode = ConnectJcrUtils.getNodeFromElement(obj, selectorName);
  		if (currNode != null) {
  			// String cmdId = OpenEntityEditor.ID;
  			// if (systemWorkbenchService != null)
  			// cmdId = systemWorkbenchService.getOpenEntityEditorCmdId();
  			// CommandUtils.callCommand(cmdId, ConnectEditor.PARAM_JCR_ID,
  			// currNode.getIdentifier());
  			if (systemWorkbenchService != null) {
  				systemWorkbenchService.openEntityEditor(currNode);
  			}
  		}
  		// } catch (RepositoryException re) {
  		// throw new ConnectException("Unable to open editor for node " + currNode, re);
  		// }
  	}
  }