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package jdk.incubator.jpackage.internal;

import java.util.Collection;
import java.util.Iterator;
import java.util.ServiceLoader;

Bundlers
The interface implemented by BasicBundlers
/**
 * Bundlers
 *
 * The interface implemented by BasicBundlers
 */
public interface Bundlers {

    
This convenience method will call createBundlersInstance(ClassLoader) with the classloader that this Bundlers is loaded from. 
Returns:
an instance of Bundlers loaded and configured from
        the current ClassLoader./**
     * This convenience method will call
     * {@link #createBundlersInstance(ClassLoader)}
     * with the classloader that this Bundlers is loaded from.
     *
     * @return an instance of Bundlers loaded and configured from
     *         the current ClassLoader.
     */
    public static Bundlers createBundlersInstance() {
        return createBundlersInstance(Bundlers.class.getClassLoader());
    }

    
This convenience method will automatically load a Bundlers instance from either META-INF/services or the default BasicBundlers if none are found in the services meta-inf. After instantiating the bundlers instance it will load the default bundlers via loadDefaultBundlers() as well as requesting the services loader to load any other bundelrs via loadBundlersFromServices(ClassLoader). 
Params:
servicesClassLoader – the classloader to search for
                           META-INF/service registered bundlers
Returns:
an instance of Bundlers loaded and configured from
        the specified ClassLoader/**
     * This convenience method will automatically load a Bundlers instance
     * from either META-INF/services or the default
     * {@link BasicBundlers} if none are found in
     * the services meta-inf.
     *
     * After instantiating the bundlers instance it will load the default
     * bundlers via {@link #loadDefaultBundlers()} as well as requesting
     * the services loader to load any other bundelrs via
     * {@link #loadBundlersFromServices(ClassLoader)}.

     *
     * @param servicesClassLoader the classloader to search for
     *                            META-INF/service registered bundlers
     * @return an instance of Bundlers loaded and configured from
     *         the specified ClassLoader
     */
    public static Bundlers createBundlersInstance(
            ClassLoader servicesClassLoader) {
        ServiceLoader<Bundlers> bundlersLoader =
                ServiceLoader.load(Bundlers.class, servicesClassLoader);
        Bundlers bundlers = null;
        Iterator<Bundlers> iter = bundlersLoader.iterator();
        if (iter.hasNext()) {
            bundlers = iter.next();
        }
        if (bundlers == null) {
            bundlers = new BasicBundlers();
        }

        bundlers.loadBundlersFromServices(servicesClassLoader);
        return bundlers;
    }

    
Returns all of the preconfigured, requested, and manually
configured bundlers loaded with this instance.
Returns:
 a read-only collection of the requested bundlers/**
     * Returns all of the preconfigured, requested, and manually
     * configured bundlers loaded with this instance.
     *
     * @return  a read-only collection of the requested bundlers
     */
    Collection<Bundler> getBundlers();

    
Returns all of the preconfigured, requested, and manually
configured bundlers loaded with this instance that are of
a specific BundleType, such as disk images, installers, or
remote installers.
Returns:
a read-only collection of the requested bundlers/**
     * Returns all of the preconfigured, requested, and manually
     * configured bundlers loaded with this instance that are of
     * a specific BundleType, such as disk images, installers, or
     * remote installers.
     *
     * @return a read-only collection of the requested bundlers
     */
    Collection<Bundler> getBundlers(String type);

    
Loads bundlers from the META-INF/services directly. This method is called from the createBundlersInstance(ClassLoader) and createBundlersInstance() methods. /**
     * Loads bundlers from the META-INF/services directly.
     *
     * This method is called from the
     * {@link #createBundlersInstance(ClassLoader)}
     * and {@link #createBundlersInstance()} methods.
     */
    void loadBundlersFromServices(ClassLoader cl);

}