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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 * 
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 * 
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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 * 
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package org.graalvm.visualvm.host.views;

import org.graalvm.visualvm.core.ui.DataSourceViewsManager;
import org.graalvm.visualvm.core.ui.PluggableDataSourceViewProvider;
import org.graalvm.visualvm.host.Host;
import org.graalvm.visualvm.host.views.overview.HostOverviewViewProvider;

/**
 * Support for built-in host views in VisualVM.
 * Currently publishes Overview subtab for Host.
 *
 * @author Jiri Sedlacek
 */
public final class HostViewsSupport {
    
    private static HostViewsSupport sharedInstance;
    
    private HostOverviewViewProvider viewProvider = new HostOverviewViewProvider();
    
    
    /**
     * Returns singleton instance of HostViewsSupport.
     * 
     * @return singleton instance of HostViewsSupport.
     */
    public static synchronized HostViewsSupport sharedInstance() {
        if (sharedInstance == null) sharedInstance = new HostViewsSupport();
        return sharedInstance;
    }
    
    /**
     * Returns PluggableDataSourceViewProvider for Overview host subtab.
     * 
     * @return PluggableDataSourceViewProvider for Overview host subtab.
     */
    public PluggableDataSourceViewProvider<Host> getOverviewView() {
        return viewProvider;
    }
    
    
    private HostViewsSupport() {
        DataSourceViewsManager.sharedInstance().addViewProvider(viewProvider, Host.class);
    }
    
}
