/*******************************************************************************
* Copyright (c) 2014 Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is 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:
* Red Hat, Inc. - initial API and implementation
* William Collins punkhornsw@gmail.com
******************************************************************************/
package org.fusesource.ide.sap.ui.command;
import java.util.Collections;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.CompoundCommand;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.command.DeleteCommand;
import org.eclipse.emf.edit.command.RemoveCommand;
import org.eclipse.emf.edit.domain.AdapterFactoryEditingDomain;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.ISources;
import org.eclipse.ui.handlers.HandlerUtil;
import org.fusesource.camel.component.sap.model.rfc.DestinationData;
import org.fusesource.camel.component.sap.model.rfc.RfcPackage;
import org.fusesource.camel.component.sap.model.rfc.ServerData;
import org.fusesource.camel.component.sap.model.rfc.impl.DestinationDataStoreEntryImpl;
import org.fusesource.camel.component.sap.model.rfc.impl.ServerDataStoreEntryImpl;
public class DeleteHandler extends AbstractHandler implements IHandler {
private EditingDomain editingDomain;
private CompoundCommand command;
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
editingDomain.getCommandStack().execute(command);
return null;
}
@Override
public void setEnabled(Object evaluationContext) {
Command deleteEntryCommand = null;
Command removeValueCommand = null;
setBaseEnabled(false);
Object obj = HandlerUtil.getVariable(evaluationContext, ISources.ACTIVE_CURRENT_SELECTION_NAME);
if (obj instanceof IStructuredSelection) {
IStructuredSelection selection = (IStructuredSelection) obj;
if (selection.size() == 1) {
obj = selection.getFirstElement();
if (obj instanceof EObject) {
EObject eObject = (EObject) obj;
editingDomain = AdapterFactoryEditingDomain.getEditingDomainFor(eObject);
if (editingDomain != null) {
deleteEntryCommand = DeleteCommand.create(editingDomain, Collections.singletonList(eObject));
if (eObject instanceof DestinationDataStoreEntryImpl) {
DestinationData destinationData = ((DestinationDataStoreEntryImpl)eObject).getValue();
removeValueCommand = RemoveCommand.create(editingDomain, destinationData.eContainer(), RfcPackage.Literals.DESTINATION_DATA_STORE__DESTINATION_DATA, Collections.singletonList(destinationData));
} else if (eObject instanceof ServerDataStoreEntryImpl) {
ServerData serverData = ((ServerDataStoreEntryImpl)eObject).getValue();
removeValueCommand = RemoveCommand.create(editingDomain, serverData.eContainer(), RfcPackage.Literals.SERVER_DATA_STORE__SERVER_DATA, Collections.singletonList(serverData));
}
if (canDelete(selection)) {
command = new CompoundCommand();
command.append(deleteEntryCommand);
command.append(removeValueCommand);
setBaseEnabled(true);
}
}
}
}
}
}
protected boolean canDelete(IStructuredSelection selection) {
if (selection.size() > 0) {
for (Object obj: selection.toList()) {
if (obj instanceof ServerDataStoreEntryImpl || (obj instanceof DestinationDataStoreEntryImpl)) {
continue;
}
return false;
}
return true;
}
return false;
}
}