Fix static analysis warnings for UML2SD

[deliverable/tracecompass.git] / org.eclipse.linuxtools.tmf.ui / src / org / eclipse / linuxtools / tmf / ui / views / uml2sd / SDWidgetSelectionProvider.java

/**********************************************************************
 * Copyright (c) 2005, 2008 IBM Corporation and others.
 * Copyright (c) 2011, 2012 Ericsson.
 * 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: 
 * IBM - Initial API and implementation
 * Bernd Hufmann - Updated for TMF
 **********************************************************************/
package org.eclipse.linuxtools.tmf.ui.views.uml2sd;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;

/**
 * <p>
 * Informs all registered listeners of graph node selection change in the Frame.
 * </p>
 * 
 * @version 1.0 
 * @author sveyrier
 * 
 */
public class SDWidgetSelectionProvider implements ISelectionProvider {

    // ------------------------------------------------------------------------
    // Attributes
    // ------------------------------------------------------------------------

    /**
     * The listener list
     */
    protected List<ISelectionChangedListener> fListenerList = null;
    /**
     * The current selection
     */
    protected ISelection fCurrentSelection = null;

    // ------------------------------------------------------------------------
    // Constructor
    // ------------------------------------------------------------------------
    /**
     * Standard constructor
     */
    protected SDWidgetSelectionProvider() {
        fListenerList = new ArrayList<ISelectionChangedListener>();
    }

    // ------------------------------------------------------------------------
    // Methods
    // ------------------------------------------------------------------------

    /*
     * (non-Javadoc)
     * @see org.eclipse.jface.viewers.ISelectionProvider#addSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
     */
    @Override
    public void addSelectionChangedListener(ISelectionChangedListener listener) {
        if (!fListenerList.contains(listener))
            fListenerList.add(listener);
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jface.viewers.ISelectionProvider#removeSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
     */
    @Override
    public void removeSelectionChangedListener(ISelectionChangedListener listener) {
        fListenerList.remove(listener);
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jface.viewers.ISelectionProvider#setSelection(org.eclipse.jface.viewers.ISelection)
     */
    @Override
    public void setSelection(ISelection selection) {
        fCurrentSelection = selection;
        for (int i = 0; i < fListenerList.size(); i++) {
            ISelectionChangedListener list = (ISelectionChangedListener) fListenerList.get(i);
            list.selectionChanged(new SelectionChangedEvent(this, fCurrentSelection));
        }
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jface.viewers.ISelectionProvider#getSelection()
     */
    @Override
    public ISelection getSelection() {
        return fCurrentSelection;
    }

}