DicomExplorerFactory.java

/*******************************************************************************
 * Copyright (c) 2016 Weasis Team and others.
 * 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 Roduit - initial API and implementation
 *******************************************************************************/
package org.weasis.dicom.explorer;

import java.util.Hashtable;

import org.osgi.service.component.ComponentContext;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Deactivate;
import org.weasis.core.api.explorer.DataExplorerView;
import org.weasis.core.api.explorer.DataExplorerViewFactory;
import org.weasis.core.api.explorer.model.DataExplorerModel;

@org.osgi.service.component.annotations.Component(service = DataExplorerViewFactory.class, immediate = false)
public class DicomExplorerFactory implements DataExplorerViewFactory {

    private DicomExplorer explorer = null;

    @org.osgi.service.component.annotations.Reference
    private DicomModel model;

    @Override
    public DataExplorerView createDataExplorerView(Hashtable<String, Object> properties) {
        if (explorer == null) {
            explorer = new DicomExplorer(model);
            model.addPropertyChangeListener(explorer);
        }
        return explorer;
    }

    // ================================================================================
    // OSGI service implementation
    // ================================================================================

    @Activate
    protected void activate(ComponentContext context) {
        // Do nothing
    }

    @Deactivate
    protected void deactivate(ComponentContext context) {
        if (explorer != null) {
            DataExplorerModel dataModel = explorer.getDataExplorerModel();
            dataModel.removePropertyChangeListener(explorer);
        }
    }
}