org.eclipse.egf.model.editor/src/org/eclipse/egf/model/editor/actions/FcoreResourcePasteAction.java

/**
 * <copyright>
 * </copyright>
 * 
 * $Id$
 */
package org.eclipse.egf.model.editor.actions;

import java.util.Collection;

import org.eclipse.egf.model.fcore.commands.FcoreResourcePasteFromClipboardCommand;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.UnexecutableCommand;
import org.eclipse.emf.edit.domain.IEditingDomainProvider;
import org.eclipse.emf.edit.ui.action.PasteAction;
import org.eclipse.ui.IWorkbenchPart;

/**
 * Multi-rooted resources support.
 * This action allows the user to paste a valid element at the resource level.
 */
public class FcoreResourcePasteAction extends PasteAction {

  /**
   * Constructor
   */
  public FcoreResourcePasteAction() {
    super();
  }

  /**
   * @since 2.1.0
   */
  @Override
  public void setActiveWorkbenchPart(IWorkbenchPart workbenchPart) {
    super.setActiveWorkbenchPart(workbenchPart);
    domain = null;
    if (workbenchPart instanceof IEditingDomainProvider) {
      domain = ((IEditingDomainProvider) workbenchPart).getEditingDomain();
    }
  }

  /**
   * @see org.eclipse.emf.edit.ui.action.CommandActionHandler#createCommand(java.util.Collection)
   */
  @Override
  public Command createCommand(Collection<?> selection) {
    if (selection == null || selection.size() != 1) {
      return UnexecutableCommand.INSTANCE;
    }
    return FcoreResourcePasteFromClipboardCommand.create(domain, selection.iterator().next(), null);
  }

}