/******************************************************************************* | |
* Copyright (c) 2012, 2016 Mia-Software. | |
* 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: | |
* Nicolas Bros (Mia-Software) - Bug 379683 - customizable Tree content provider | |
* Nicolas Bros (Mia-Software) - Bug 380407 - Missing since tag on CustomizedContentProviderUtils | |
* Grégoire Dupé (Mia-Software) - Bug 506334 - Need to know which TreeElement has been updated | |
*******************************************************************************/ | |
package org.eclipse.modisco.facet.custom.ui; | |
import java.util.ArrayList; | |
import java.util.Iterator; | |
import java.util.List; | |
import org.eclipse.core.runtime.Assert; | |
import org.eclipse.emf.ecore.EObject; | |
import org.eclipse.emf.ecore.EStructuralFeature; | |
import org.eclipse.jface.viewers.ISelection; | |
import org.eclipse.jface.viewers.IStructuredSelection; | |
import org.eclipse.jface.viewers.StructuredSelection; | |
import org.eclipse.modisco.facet.custom.metamodel.v0_2_0.internal.treeproxy.EAttributeTreeElement; | |
import org.eclipse.modisco.facet.custom.metamodel.v0_2_0.internal.treeproxy.EObjectTreeElement; | |
import org.eclipse.modisco.facet.custom.metamodel.v0_2_0.internal.treeproxy.EReferenceTreeElement; | |
import org.eclipse.modisco.facet.custom.metamodel.v0_2_0.internal.treeproxy.TreeElement; | |
/** | |
* A companion utility class for {@link ICustomizedTreeContentProvider} | |
* | |
* @since 0.2 | |
*/ | |
public final class CustomizedContentProviderUtils { | |
private CustomizedContentProviderUtils() { | |
// utility class | |
} | |
/** | |
* Replace proxy objects by their underlying model elements in the given selection | |
* | |
* @return the unwrapped version of the selection | |
*/ | |
public static ISelection resolveSelection(final ISelection selection) { | |
Assert.isNotNull(selection); | |
ISelection result; | |
if (selection instanceof IStructuredSelection) { | |
final IStructuredSelection strSelection = (IStructuredSelection) selection; | |
final List<Object> resolvedElements = new ArrayList<Object>(); | |
final Iterator<?> iterator = strSelection.iterator(); | |
while (iterator.hasNext()) { | |
final Object element = iterator.next(); | |
resolvedElements.add(resolve(element)); | |
} | |
result = new StructuredSelection(resolvedElements); | |
} else { | |
throw new IllegalArgumentException("Unhandled selection type: " + selection.getClass().getName()); //$NON-NLS-1$ | |
} | |
return result; | |
} | |
/** | |
* Resolve the given UI element into the underlying model element. | |
* | |
* @param element | |
* a UI element, that may be a proxy for a model element | |
* @return the corresponding model element, or the given element if it is not a proxy | |
*/ | |
public static Object resolve(final Object element) { | |
Object resolved = element; | |
if (element instanceof EObjectTreeElement) { | |
resolved = ((EObjectTreeElement) element).getEObject(); | |
} else if (element instanceof EAttributeTreeElement) { | |
resolved = ((EAttributeTreeElement) element).getEAttribute(); | |
} else if (element instanceof EReferenceTreeElement) { | |
resolved = ((EReferenceTreeElement) element).getEReference(); | |
} | |
return resolved; | |
} | |
/** | |
* @since 1.2 | |
*/ | |
public static EStructuralFeature getEStructuralFeature(final Object treeElt) { | |
EStructuralFeature result = null; | |
if (treeElt instanceof EReferenceTreeElement) { | |
final EReferenceTreeElement refTreeElt = (EReferenceTreeElement) treeElt; | |
result = refTreeElt.getEReference(); | |
} | |
return result; | |
} | |
/** | |
* @since 1.2 | |
*/ | |
public static EObject getParentEObject(final Object object) { | |
Object supposedTreeElt = null; | |
if (!(object instanceof EObjectTreeElement) | |
&& (object instanceof TreeElement)) { | |
final TreeElement treeElt = (TreeElement) object; | |
supposedTreeElt = treeElt.getParent(); | |
} else { | |
supposedTreeElt = object; | |
} | |
return getEObject(supposedTreeElt); | |
} | |
/** | |
* @since 1.2 | |
*/ | |
public static EObject getEObject(final Object object) { | |
EObject result = null; | |
if (object instanceof EObjectTreeElement) { | |
final EObjectTreeElement eObjTreeElt = (EObjectTreeElement) object; | |
result = eObjTreeElt.getEObject(); | |
} | |
return result; | |
} | |
} |