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/*******************************************************************************
* Copyright (c) 2013 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:
* Cedric Dumoulin - cedric.dumoulin@lifl.fr
******************************************************************************/
package org.eclipse.papyrus.layers3.ui.commands;
import java.util.List;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.papyrus.infra.core.services.ServiceException;
import org.eclipse.papyrus.layers.stackmodel.LayersException;
import org.eclipse.papyrus.layers.stackmodel.NotFoundException;
import org.eclipse.papyrus.layers.stackmodel.layers.AbstractLayerOperator;
import org.eclipse.papyrus.layers.stackmodel.layers.LayerOperator;
import org.eclipse.papyrus.layers.stackmodel.layers.LayersStack;
import org.eclipse.papyrus.layers.stackmodel.layers.LayersStackApplication;
import static org.eclipse.papyrus.layers.ui.Activator.log;
/**
* @author cedric dumoulin
*
*/
public class CreateLayerOperatorsFromParameter extends AbstractLayersCommand {
/**
* Value used to compute new names.
*/
private static int creationCount = 0;
/**
* ID of the layer to create
*/
private String newLayerID;
/**
* the application object, if found
*/
private LayersStackApplication application;
/**
*
* Constructor.
*
*/
public CreateLayerOperatorsFromParameter() {
super();
}
/**
* Prepare the execution of the command
*
* @see org.eclipse.papyrus.layers3.ui.commands.AbstractLayersCommand#preExecute(org.eclipse.core.commands.ExecutionEvent, org.eclipse.core.expressions.IEvaluationContext, java.util.List)
*
* @param event
* @param context
* @param selections
* @return
* @throws ExecutionException
*/
@Override
protected boolean preExecute(ExecutionEvent event, IEvaluationContext context, List<Object> selections) throws ExecutionException {
if (!isEnabled(context, selections)) {
return false;
}
// Get command parameters
newLayerID = event.getParameter("org.eclipse.papyrus.layers.ui.createLayerOperator.parameters");
if (log.isDebugEnabled()) {
log.debug("Create Layer Operators '" + newLayerID + "'.");
}
// Get application
try {
application = lookupLayersStackApplicationChecked(context);
} catch (NotFoundException e) {
// Silently fails
return false;
} catch (org.eclipse.papyrus.infra.core.resource.NotFoundException e) {
// Silently fails
return false;
} catch (ServiceException e) {
// Silently fails
return false;
}
return true;
}
/**
*
* @see org.eclipse.papyrus.layers3.ui.commands.AbstractLayersCommand#doExecute(org.eclipse.core.commands.ExecutionEvent, org.eclipse.core.expressions.IEvaluationContext, java.util.List)
*
* @param event
* @param context
* @param selections
*/
@Override
protected void doExecute(ExecutionEvent event, IEvaluationContext context, List<Object> selections) {
if (log.isDebugEnabled()) {
log.debug(this.getClass().getSimpleName() + ".doExecute()");
}
// Create a layer !
AbstractLayerOperator layerOperator;
try {
layerOperator = application.getLayerOperatorDescriptorRegistry().createLayerOperator(newLayerID);
layerOperator.setName("layer" + creationCount++);
layerOperator.setApplication(application);
} catch (LayersException e) {
// e.printStackTrace();
log.error("Log - " + this.getClass().getName()
+ " - " + e.getMessage(), e);
return;
}
// insert layer in selected object
Object selection = selections.get(0);
if (selection instanceof LayersStack) {
LayersStack stack = (LayersStack) selection;
stack.setLayers(layerOperator);
}
else {
LayerOperator operator = (LayerOperator) selection;
operator.getLayers().add(layerOperator);
}
}
/**
* Return true if it is possible to attach aLyerStack.
*/
@Override
public boolean isEnabled(IEvaluationContext context, List<Object> selections) {
if (selections.size() != 1) {
return false;
}
Object first = selections.get(0);
boolean res = (first instanceof LayerOperator) || (first instanceof LayersStack);
return res;
}
/**
*
* @see org.eclipse.papyrus.layers3.ui.commands.AbstractLayersCommand#getCommandName()
*
* @return
*/
@Override
public String getCommandName() {
return "Create Layer Operator";
}
}
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