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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).
*
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package com.sun.tools.visualvm.host.model;
import com.sun.tools.visualvm.core.model.ModelFactory;
import com.sun.tools.visualvm.core.model.ModelProvider;
import com.sun.tools.visualvm.host.Host;
/**
* The HostOverviewFactory class is a factory class for getting the
* {@link HostOverview} representation for the {@link Host}.
*
* @author Tomas Hurka
*/
public final class HostOverviewFactory extends ModelFactory<HostOverview,Host> implements ModelProvider<HostOverview,Host> {
private static HostOverviewFactory overviewFactory;
private HostOverviewFactory() {
}
/**
* Getter for the default version of the HostOverviewFactory.
* @return instance of {@link HostOverviewFactory}.
*/
public static synchronized HostOverviewFactory getDefault() {
if (overviewFactory == null) {
overviewFactory = new HostOverviewFactory();
overviewFactory.registerProvider(overviewFactory);
}
return overviewFactory;
}
/**
* Factory method for obtaining {@link HostOverview} for {@link Host}. Note that there
* is only one instance of {@link HostOverview} for a concrete application. This {@link HostOverview}
* instance is cached. This method can return <CODE>null</CODE> if there is no HostOverview
* available
* @param host host
* @return {@link HostOverview} instance or <CODE>null</CODE> if there is no
* {@link HostOverview}
*/
public static HostOverview getSystemOverviewFor(Host host) {
return getDefault().getModel(host);
}
/**
* Default {@link ModelProvider} implementation, which creates
* HostOverview for localhost. If you want to extend HostOverviewFactory use
* {@link HostOverviewFactory#registerProvider(ModelProvider)} to register the new instances
* of {@link ModelProvider} for the different types of {@link Host}.
* @param host host
* @return instance of {@link HostOverview} for localhost
*/
public HostOverview createModelFor(Host host) {
if (Host.LOCALHOST.equals(host)) {
return new LocalHostOverview();
}
return null;
}
}