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/*****************************************************************************
* Copyright (c) 2015 CEA LIST and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Gabriel Pascual (ALL4TEC) gabriel.pascual@all4tec.net - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.extensionpoints.editors.preferences.provider;
import java.util.List;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
/**
* Content provider to display in tree DirectEditor and its Constraint.
*
* @author Gabriel Pascual
*
*/
public class DirectEditorContentProvider implements ITreeContentProvider {
/**
* @see org.eclipse.jface.viewers.IContentProvider#dispose()
*
*/
public void dispose() {
// Nothing to do
}
/**
* @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
*
* @param viewer
* @param oldInput
* @param newInput
*/
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
// Nothing to do
}
/**
* @see org.eclipse.jface.viewers.ITreeContentProvider#getElements(java.lang.Object)
*
* @param inputElement
* @return
*/
public Object[] getElements(Object inputElement) {
Object[] elementsArray = null;
if (inputElement instanceof List<?>) {
elementsArray = ((List<?>) inputElement).toArray();
}
return elementsArray;
}
/**
* @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
*
* @param parentElement
* @return
*/
public Object[] getChildren(Object parentElement) {
Object[] childrenArray = null;
if (parentElement instanceof DirectEditorTreeItem) {
childrenArray = ((DirectEditorTreeItem) parentElement).getMetaClassConstraints().toArray();
}
return childrenArray;
}
/**
* @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
*
* @param element
* @return
*/
public Object getParent(Object element) {
return null;
}
/**
* @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
*
* @param element
* @return
*/
public boolean hasChildren(Object element) {
boolean children = false;
if (element instanceof DirectEditorTreeItem) {
children = !((DirectEditorTreeItem) element).getMetaClassConstraints().isEmpty();
}
return children;
}
}
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