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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:
* Tatiana Fesenko (CEA LIST) - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.wizards.kind;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.papyrus.infra.viewpoints.configuration.Category;
import org.eclipse.papyrus.infra.viewpoints.configuration.ModelRule;
import org.eclipse.papyrus.infra.viewpoints.configuration.PapyrusView;
import org.eclipse.papyrus.infra.viewpoints.policy.PolicyChecker;
import org.eclipse.papyrus.infra.viewpoints.policy.ViewPrototype;
import org.eclipse.uml2.uml.UMLPackage;
/**
* The ContentProvider for DiagramCategory table.
* Returns available diagram kinds for the given diagram category(ies).
*/
public class DiagramKindContentProvider implements IStructuredContentProvider {
private final Map<String, Collection<ViewPrototype>> prototypes;
/**
* Instantiates a new diagram kind content provider.
*
*/
public DiagramKindContentProvider() {
Collection<ViewPrototype> vps = PolicyChecker.getCurrent().getAllPrototypes();
this.prototypes = new HashMap<String, Collection<ViewPrototype>>();
for (ViewPrototype vp : vps)
for (Category category : vp.getCategories())
cache(category.getName(), vp);
}
/**
* Stores the given diagram prototype in the cache
* @param prototype The prototype to cache
*/
private void cache(String category, ViewPrototype prototype) {
if (!prototypes.containsKey(category))
prototypes.put(category, new ArrayList<ViewPrototype>());
prototypes.get(category).add(prototype);
}
/**
* Dispose.
*
* @see org.eclipse.jface.viewers.IContentProvider#dispose()
*/
public void dispose() {
prototypes.clear();
}
/**
* Input changed.
*
* @param viewer the viewer
* @param oldInput the old input
* @param newInput the new input
* @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
*/
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
}
/**
* Gets the elements.
*
* @param inputElement the input element
* @return the elements
* @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
*/
public Object[] getElements(Object inputElement) {
if(inputElement instanceof Object[]) {
List<ViewPrototype> result = new ArrayList<ViewPrototype>();
for (Object next: (Object[])inputElement) {
if (next instanceof String) {
String diagramCategory = (String)next;
result.addAll(getPrototypes(diagramCategory));
}
}
Collections.sort(result, new Comparator<ViewPrototype>() {
public int compare(ViewPrototype o1, ViewPrototype o2) {
return o1.getLabel().compareTo(o2.getLabel());
}
});
return result.toArray(new Object[result.size()]);
}
if(inputElement instanceof String) {
String diagramCategory = (String)inputElement;
List<ViewPrototype> result = getPrototypes(diagramCategory);
return result.toArray(new Object[result.size()]);
}
return null;
}
/**
* Gets the creation commands.
*
* @param diagramCategory the diagram category
* @return the creation commands
*/
protected List<ViewPrototype> getPrototypes(String diagramCategory) {
List<ViewPrototype> result = new ArrayList<ViewPrototype>();
if (!prototypes.containsKey(diagramCategory))
return result;
EClass rootType = getExpectedRootType(diagramCategory);
for(ViewPrototype proto : prototypes.get(diagramCategory))
if (isAllowedOn(proto, rootType))
result.add(proto);
return result;
}
private EClass getExpectedRootType(String category) {
if ("profile".equals(category))
return UMLPackage.eINSTANCE.getProfile();
return UMLPackage.eINSTANCE.getModel();
}
private boolean isAllowedOn(ViewPrototype prototype, EClass clazz) {
PapyrusView current = prototype.getConfiguration();
while (current != null) {
for (ModelRule rule : current.getModelRules()) {
int result = allows(rule, clazz);
if (result == -1)
return false;
if (result == 1)
return true;
}
current = current.getParent();
}
return false;
}
private int allows(ModelRule rule, EClass owner) {
EClass c = rule.getElement();
if (c == null || c.isSuperTypeOf(owner)) {
// matching type => check the application of the required stereotypes
return rule.isPermit() ? 1 : -1;
} else {
// type is not matching => unknown
return 0;
}
}
}
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