1 files changed, 155 insertions, 0 deletions
diff --git a/plugins/uml/diagram/org.eclipse.papyrus.uml.diagram.common/src/org/eclipse/papyrus/uml/diagram/common/service/PasteCommandService.java b/plugins/uml/diagram/org.eclipse.papyrus.uml.diagram.common/src/org/eclipse/papyrus/uml/diagram/common/service/PasteCommandService.java
new file mode 100644
index 00000000000..b161456f8c7
--- /dev/null
+++ b/plugins/uml/diagram/org.eclipse.papyrus.uml.diagram.common/src/org/eclipse/papyrus/uml/diagram/common/service/PasteCommandService.java
@@ -0,0 +1,155 @@
+/*****************************************************************************
+ * Copyright (c) 2010 CEA LIST.
+ *
+ *    
+ * 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:
+ *  Patrick Tessier (CEA LIST) Patrick.tessier@cea.fr - Initial API and implementation
+ *
+ *****************************************************************************/
+package org.eclipse.papyrus.uml.diagram.common.service;
+
+import java.awt.datatransfer.Clipboard;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.gmf.runtime.common.core.command.ICommand;
+import org.eclipse.gmf.runtime.common.core.command.UnexecutableCommand;
+import org.eclipse.gmf.runtime.diagram.ui.editparts.GraphicalEditPart;
+import org.eclipse.papyrus.uml.diagram.common.providers.IPasteCommandProvider;
+import org.eclipse.papyrus.uml.diagram.common.Activator;
+import org.osgi.framework.Bundle;
+
+/**
+ * this singleton looks for in extension point to find a pasteCommandProvider
+ * and can provide a paste command
+ */
+
+
+public class PasteCommandService {
+
+	protected static final String PASTECOMMANDPROVIDER_EXTENSION_ID = "org.eclipse.papyrus.infra.gmfdiag.common.pasteCommandProvider"; //$NON-NLS-1$
+
+	protected static final String REALIZATION = "realization"; //$NON-NLS-1$
+
+	protected static final String PRIORITY = "priority"; //$NON-NLS-1$
+
+	protected static PasteCommandService instance = null;
+
+	public static PasteCommandService getInstance() {
+		if(instance == null) {
+			instance = new PasteCommandService();
+		}
+		return instance;
+	}
+
+
+	/**
+	 * Load an instance of a class
+	 * 
+	 * @param element
+	 *        the extension point
+	 * @param classAttribute
+	 *        the name of the class to load
+	 * @return the loaded Class
+	 * @throws Exception
+	 *         if the class is not loaded
+	 */
+	protected static Object createExtension(final IConfigurationElement element, final String classAttribute) throws Exception {
+		try {
+			Bundle extensionBundle = Platform.getBundle(element.getDeclaringExtension().getNamespaceIdentifier());
+			Class clazz = extensionBundle.loadClass(classAttribute);
+			Object obj = clazz.newInstance();
+			return obj;
+		} catch (Exception e) {
+			throw new Exception("Unable to create Extension" + e); //$NON-NLS-1$
+		}
+	}
+
+	protected Map<String, IPasteCommandProvider> pasteCommandProviderMap;
+
+	
+	private PasteCommandService() {
+		// Reading data from plugins
+		IConfigurationElement[] configElements = Platform.getExtensionRegistry().getConfigurationElementsFor(PASTECOMMANDPROVIDER_EXTENSION_ID);
+		pasteCommandProviderMap = new HashMap<String, IPasteCommandProvider>();
+		for(int i = 0; i < configElements.length; i++) {
+			getPasteCommandProvider(configElements[i]);
+		}
+
+	}
+
+	/**
+	 * Load one rule
+	 * 
+	 * @param element
+	 *        the extension point
+	 */
+	protected void getPasteCommandProvider(IConfigurationElement element) {
+		IPasteCommandProvider pasteCommandProvider = null;
+		try {
+			pasteCommandProvider = (IPasteCommandProvider)createExtension(element, element.getAttribute(REALIZATION));
+			String priority = (String)element.getAttribute(PRIORITY);
+			pasteCommandProviderMap.put(priority, pasteCommandProvider);
+
+		} catch (Exception e) {
+			Activator.log.error("- " + pasteCommandProvider + " can not be loaded: " + e.getLocalizedMessage(), e); //$NON-NLS-1$
+		}
+	}
+
+	protected IPasteCommandProvider lookForProvider() {
+		String[] priority = { "Highest", "High", "Medium", "Low", "Lowest" };
+		IPasteCommandProvider selectedProvider = null;
+		int i = 0;
+		while(selectedProvider == null && i < priority.length) {
+			selectedProvider = pasteCommandProviderMap.get(priority[i]);
+			i++;
+		}
+		return selectedProvider;
+	}
+
+	/**
+	 * return the paste command to execute by taking account parameter
+	 * 
+	 * @param targetEditPart
+	 *        the target where object will be paste
+	 * @param systemClipboard
+	 *        contains info form the system copy paste
+	 * @param papyrusCliboard
+	 *        the list of views to paste
+	 * @return a command
+	 */
+	public ICommand getPasteViewCommand(GraphicalEditPart targetEditPart, Clipboard systemClipboard, Collection<Object> papyrusCliboard) {
+		IPasteCommandProvider selectedProvider = lookForProvider();
+		if(selectedProvider == null) {
+			return UnexecutableCommand.INSTANCE;
+		}
+		return selectedProvider.getPasteViewCommand(targetEditPart, systemClipboard, papyrusCliboard);
+	}
+	
+	/**
+	 * return the paste command to execute by taking account parameter. It copy also element of the semantic model
+	 * 
+	 * @param targetEditPart
+	 *        the target where object will be paste
+	 * @param systemClipboard
+	 *        contains info form the system copy paste
+	 * @param papyrusCliboard
+	 *        the list of views to paste
+	 * @return a command
+	 */
+	public ICommand getPasteWithModelCommand(GraphicalEditPart targetEditPart, Clipboard systemClipboard, Collection<Object> papyrusCliboard) {
+		IPasteCommandProvider selectedProvider = lookForProvider();
+		if(selectedProvider == null) {
+			return UnexecutableCommand.INSTANCE;
+		}
+		return selectedProvider.getPasteWithModelCommand(targetEditPart, systemClipboard, papyrusCliboard);
+	}
+}