1 files changed, 103 insertions, 0 deletions
diff --git a/extraplugins/java/org.eclipse.papyrus.java.reverse.ui/src/org/eclipse/papyrus/java/reverse/ui/dnd/DropReverseCommand.java b/extraplugins/java/org.eclipse.papyrus.java.reverse.ui/src/org/eclipse/papyrus/java/reverse/ui/dnd/DropReverseCommand.java
new file mode 100755
index 00000000000..6fd08880aca
--- /dev/null
+++ b/extraplugins/java/org.eclipse.papyrus.java.reverse.ui/src/org/eclipse/papyrus/java/reverse/ui/dnd/DropReverseCommand.java
@@ -0,0 +1,103 @@
+/*****************************************************************************
+ * Copyright (c) 2014 Jonathan Geoffroy.
+ *
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * 	Jonathan Geoffroy	geoffroy.jonathan@gmail.com		- initial implementation
+ *
+ *****************************************************************************/
+
+package org.eclipse.papyrus.java.reverse.ui.dnd;
+
+import java.util.List;
+
+import org.eclipse.core.commands.ExecutionException;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.gef.Request;
+import org.eclipse.gef.commands.Command;
+import org.eclipse.jdt.core.IJavaElement;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.papyrus.java.reverse.ui.ReverseCodeHandler;
+import org.eclipse.ui.IWorkbenchPage;
+import org.eclipse.ui.PlatformUI;
+
+/**
+ * Command called when user drop Java Elements into diagram model (on Papyrus editor).
+ * Check for selected elements, and run reverse handler if all selected files are reversible.
+ * 
+ * This command implements a Singleton Pattern. You should use ReverseCommand.getInstance() to receive a Singleton of this Command.
+ * 
+ * @author Jonathan Geoffroy
+ *
+ */
+public class DropReverseCommand extends Command {
+
+	/**
+	 * Singleton implementation of ReverseCommand
+	 * Always return this instance of Reverse Command when ask for instance
+	 * 
+	 * @see {getInstance()}
+	 */
+	private static DropReverseCommand instance;
+
+	/**
+	 * Constructor. Initialize the request for this ReverseCommand
+	 */
+	private DropReverseCommand() {
+		super();
+	}
+
+	@Override
+	public boolean canExecute() {
+		// Find the type of each selected file (CompilationUnit, packages ...)
+		List selected; // The selected files from JDT
+
+		IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
+		ISelection selection = page.getSelection();
+		if(!(selection instanceof IStructuredSelection)) {
+			return false;
+		}
+		IStructuredSelection structuredSelection = (IStructuredSelection)selection;
+		selected = structuredSelection.toList();
+
+		// For each selected object, check if it's reversible.
+		for(Object s : selected) {
+			// We can only reverse Java Elements. Moreover, reversing projects is not available yet 
+			if(!(s instanceof IJavaElement) || s instanceof IProject) {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	@Override
+	public void execute() {
+		ReverseCodeHandler reverse = new ReverseCodeHandler();
+		try {
+			reverse.execute(null);
+		} catch (ExecutionException e) {
+			e.printStackTrace();
+		}
+	}
+
+	/**
+	 * return a singleton of this command
+	 * Change the request if it differ from the previous calling
+	 * 
+	 * 
+	 * @return a singleton of this command
+	 */
+	public static DropReverseCommand getInstance(Request request) {
+		if(instance == null) {
+			instance = new DropReverseCommand();
+		}
+
+		return instance;
+	}
+}