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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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 *
 * 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.jmx.impl;

import org.graalvm.visualvm.core.model.AbstractModelProvider;
import org.graalvm.visualvm.core.model.ModelProvider;
import org.graalvm.visualvm.application.Application;
import org.graalvm.visualvm.core.datasupport.Stateful;
import org.graalvm.visualvm.tools.jmx.JmxModel;
import org.graalvm.visualvm.tools.jvmstat.JvmstatModel;
import org.graalvm.visualvm.tools.jvmstat.JvmstatModelFactory;

/**
 * The {@code JmxModelFactory} class is a factory class for getting
 * the {@link JmxModel} representation for the {@link Application}.
 *
 * @author Luis-Miguel Alventosa
 */
public class JmxModelProvider extends AbstractModelProvider<JmxModel, Application> {
    
    
    /**
     * Default {@link ModelProvider} implementation for {@link JmxModel}.
     *
     * In order to extend the {@code JmxModelFactory} to register your
     * own {@link JmxModel}s for the different types of {@link Application}
     * call {@link JmxModelFactory#registerProvider(ModelProvider)} supplying
     * the new instance of {@link ModelProvider}.
     *
     * @param app application.
     *
     * @return an instance of {@link JmxModel}.
     */
    public JmxModel createModelFor(Application app) {
        JvmstatModel jvmstat;
        
        if (app instanceof JmxApplication) {
            if (app.getState() == Stateful.STATE_AVAILABLE)
                return new JmxModelImpl((JmxApplication) app);
            return new DisconnectedJmxModel((JmxApplication) app);
        }
        jvmstat = JvmstatModelFactory.getJvmstatFor(app);
        if (jvmstat != null) {
            return new JmxModelImpl(app,jvmstat);
        }
        return null;
    }
}
