JvmstatModelFactory.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.tools.jvmstat;

import com.sun.tools.visualvm.application.Application;
import com.sun.tools.visualvm.core.model.ModelFactory;

/**
 * The JvmstatModelFactory class is a factory class for getting the
 * {@link JvmstatModel} representation for the {@link Application}.
 * 
 * @author Tomas Hurka
 */
public final class JvmstatModelFactory extends ModelFactory<JvmstatModel, Application> {

    private static JvmstatModelFactory jvmstatFactory;

    private JvmstatModelFactory() {
    }

    /**
     * Getter for the default version of the JvmstatModelFactory.
     * @return instance of {@link JvmstatModelFactory}.
     */
    public static synchronized JvmstatModelFactory getDefault() {
        if (jvmstatFactory == null) {
            jvmstatFactory = new JvmstatModelFactory();
        }
        return jvmstatFactory;
    }
    
    /**
     * Factory method for obtaining {@link JvmstatModel} for {@link Application}. Note that there
     * is only one instance of {@link JvmstatModel} for a concrete application. This {@link JvmstatModel}
     * instance is cached. This method can return <CODE>null</CODE> if there is no JvmstatModel
     * available
     * @param app application
     * @return {@link JvmstatModel} instance or <CODE>null</CODE> if there is no
     * {@link JvmstatModel}
     */
    public static JvmstatModel getJvmstatFor(Application app) {
        return getDefault().getModel(app);
    }
    
}