gov.nasa.ensemble.common.ui.editor.SelectionProviderAdapter.java Source code

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Here is the source code for gov.nasa.ensemble.common.ui.editor.SelectionProviderAdapter.java

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/*******************************************************************************
 * Copyright 2014 United States Government as represented by the
 * Administrator of the National Aeronautics and Space Administration.
 * All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package gov.nasa.ensemble.common.ui.editor;

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

import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.jface.util.SafeRunnable;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;

public class SelectionProviderAdapter implements ISelectionProvider {

    private List<ISelectionChangedListener> listeners = new ArrayList<ISelectionChangedListener>();
    private ISelection theSelection = StructuredSelection.EMPTY;

    @Override
    public void addSelectionChangedListener(ISelectionChangedListener listener) {
        listeners.add(listener);
    }

    @Override
    public ISelection getSelection() {
        return theSelection;
    }

    @Override
    public void removeSelectionChangedListener(ISelectionChangedListener listener) {
        listeners.remove(listener);
    }

    @Override
    public void setSelection(ISelection selection) {
        theSelection = selection;
        final SelectionChangedEvent e = new SelectionChangedEvent(this, selection);
        Object[] listenersArray = listeners.toArray();

        for (int i = 0; i < listenersArray.length; i++) {
            final ISelectionChangedListener l = (ISelectionChangedListener) listenersArray[i];
            SafeRunner.run(new SafeRunnable() {
                @Override
                public void run() {
                    l.selectionChanged(e);
                }
            });
        }
    }

}