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package org.glassfish.hk2.xml.api;

import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.configuration.hub.api.ManagerUtilities;
import org.glassfish.hk2.utilities.ServiceLocatorUtilities;
import org.glassfish.hk2.xml.internal.DomXmlParser;
import org.glassfish.hk2.xml.internal.XmlServiceImpl;
import org.glassfish.hk2.xml.jaxb.internal.JAXBXmlParser;

/**
 * Useful utilities for initializing the HK2 XmlService
 * 
 * @author jwells
 */
public class XmlServiceUtilities {

    /**
     * Enables the Hk2 XmlService in the given locator.  Will
     * also enable the HK2 Configuration Hub if the hub has
     * not already been started.  This operation is idempotent
     * in that if the XmlService is already available in the
     * given locator then this method does nothing
     * 
     * @param locator The non-null locator to which to add
     * the {@link XmlService}
     */
    public static void enableXmlService(ServiceLocator locator) {
        if (locator.getServiceHandle(XmlService.class) != null) return;
        
        ManagerUtilities.enableConfigurationHub(locator);
        
        ServiceLocatorUtilities.addClasses(locator, true, JAXBXmlParser.class, XmlServiceImpl.class);
    }
    
    /**
     * Enables the Hk2 XmlService in the given locator.  Will
     * also enable the HK2 Configuration Hub if the hub has
     * not already been started.  This operation is idempotent
     * in that if the XmlService is already available in the
     * given locator then this method does nothing
     * 
     * @param locator The non-null locator to which to add
     * the {@link XmlService}
     */
    public static void enableDomXmlService(ServiceLocator locator) {
        if (locator.getServiceHandle(XmlService.class) != null) return;
        
        ManagerUtilities.enableConfigurationHub(locator);
        
        ServiceLocatorUtilities.addClasses(locator, true, DomXmlParser.class, XmlServiceImpl.class);
    }
}