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/*****************************************************************************
* 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.pastemanager.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.pastemanager.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.uml.pastemanager.pasteCommandProvider";
protected static final String REALIZATION = "realization";
protected static final String PRIORITY = "priority";
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);
}
}
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);
}
}
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);
}
}
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