edu.cornell.mannlib.vitro.webapp.application.ApplicationUtils.java Source code

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Here is the source code for edu.cornell.mannlib.vitro.webapp.application.ApplicationUtils.java

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/* $This file is distributed under the terms of the license in /doc/license.txt$ */

package edu.cornell.mannlib.vitro.webapp.application;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import edu.cornell.mannlib.vitro.webapp.modules.Application;

/**
 * Tools for working with the current Application instance.
 */
public class ApplicationUtils {
    private static final Log log = LogFactory.getLog(ApplicationUtils.class);

    private static volatile Application instance;

    public static Application instance() {
        try {
            instance.getClass();
            return instance;
        } catch (NullPointerException e) {
            log.error("Called for Application before it was available", e);
            throw new IllegalStateException("Called for Application before it was available", e);
        }
    }

    static void setInstance(Application application) {
        instance = application;
    }
}