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/*******************************************************************************
* Copyright (c) 2005-2009 itemis AG (http://www.itemis.eu) and others.
* 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
*
*******************************************************************************/
package org.eclipse.xtend.util.stdlib;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.mwe.core.WorkflowContext;
import org.eclipse.emf.mwe.core.issues.Issues;
import org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent2;
import org.eclipse.emf.mwe.core.monitor.ProgressMonitor;
/**
* This component copies an element from one slot to a list contained in another
* slot.
*
* <h2>Properties</h2>
* <table border="1">
* <tr>
* <th>Property</th>
* <th>Type</th>
* <th>Mandatory</th>
* <th>Description</th>
* </tr>
* <td><tt>modelSlot</tt></td>
* <td>String</td>
* <td>yes</td>
* <td>Source slot name.</td>
* </tr>
* <tr>
* <td><tt>listSlot</tt></td>
* <td>String</td>
* <td>yes</td>
* <td>Target slot name. This slot contains a list of elements.</td>
* </tr>
* <tr>
* <tr>
* <td><tt>uniqueNames</tt></td>
* <td>boolean</td>
* <td>no</td>
* <td>If <code>true</code>, names have to be unique, otherwise not. Requires
* that <tt>modelSlot</tt> contains an <tt>EObject</tt>.</td>
* </tr>
* </table>
*/
public class SlotListAdder extends AbstractWorkflowComponent2 {
private static final String COMPONENT_NAME = "Slot List Adder";
private String modelSlot;
private String listSlot;
private Set<String> nameSet = new HashSet<String>();
private boolean uniqueNames;
/**
* Sets the list slot.
*
* @param listSlot
* name of slot
*/
public void setListSlot(String listSlot) {
this.listSlot = listSlot;
}
/**
* Sets the model slot.
*
* @param modelSlot
* name of slot
*/
public void setModelSlot(String modelSlot) {
this.modelSlot = modelSlot;
}
/**
* Sets if names have to be unique.
*
* @param uniqueNames
* If <code>true</code>, names have to be unique, otherwise not.
*/
public void setUniqueNames(boolean uniqueNames) {
this.uniqueNames = uniqueNames;
}
@Override
protected void checkConfigurationInternal(Issues issues) {
if (modelSlot == null) {
issues.addError(this, "no modelSlot specified.");
}
if (listSlot == null) {
issues.addError(this, "no listSlot specified.");
}
}
/**
* @see org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent#getLogMessage()
*/
@Override
public String getLogMessage() {
return "adding contents of slot '" + modelSlot + "' to the list of stuff in '" + listSlot + "'";
}
@SuppressWarnings("unchecked")
@Override
protected void invokeInternal(WorkflowContext ctx, ProgressMonitor mon, Issues issues) {
Object listContent = ctx.get(listSlot);
if (listContent == null) {
issues.addWarning("'" + listSlot + "' is empty, creating a new list.", this);
listContent = new ArrayList();
ctx.set(listSlot, listContent);
}
if (!(listContent instanceof Collection)) {
issues.addError("contents of '" + listSlot + "' slot is not a collection, but rather a '"
+ listSlot.getClass().getName() + "'", this);
return;
}
Object modelContent = ctx.get(modelSlot);
if (modelContent == null) {
issues
.addWarning("'" + modelSlot + "' is empty; not adding anything to the '" + listSlot + "' slot.",
this);
return;
}
if (uniqueNames) {
EObject eo = (EObject) modelContent;
DynamicEcoreHelper h = new DynamicEcoreHelper(eo);
String name = h.getName(eo);
if (!nameSet.contains(name)) {
((Collection) listContent).add(modelContent);
nameSet.add(name);
}
}
else {
((Collection) listContent).add(modelContent);
}
}
/**
* @see org.eclipse.emf.mwe.core.lib.AbstractWorkflowComponent#getComponentName()
*/
@Override
public String getComponentName() {
return COMPONENT_NAME;
}
}
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