/*
 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
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 */

package java.util.spi;

import java.util.ResourceBundle;

/**
 * An interface for service providers that provide implementations of {@link
 * java.util.ResourceBundle.Control}. The <a
 * href="../ResourceBundle.html#default_behavior">default resource bundle loading
 * behavior</a> of the {@code ResourceBundle.getBundle} factory methods that take
 * no {@link java.util.ResourceBundle.Control} instance can be modified with {@code
 * ResourceBundleControlProvider} implementations.
 *
 * <p>Provider implementations must be packaged using the <a
 * href="../../../../technotes/guides/extensions/index.html">Java Extension
 * Mechanism</a> as installed extensions. Refer to {@link java.util.ServiceLoader}
 * for the extension packaging. Any installed {@code
 * ResourceBundleControlProvider} implementations are loaded using {@link
 * java.util.ServiceLoader} at the {@code ResourceBundle} class loading time.
 *
 * @author Masayoshi Okutsu
 * @since 1.8
 * @see ResourceBundle#getBundle(String, java.util.Locale, ClassLoader, ResourceBundle.Control)
 *      ResourceBundle.getBundle
 * @see java.util.ServiceLoader#loadInstalled(Class)
 */
public interface ResourceBundleControlProvider {
    /**
     * Returns a {@code ResourceBundle.Control} instance that is used
     * to handle resource bundle loading for the given {@code
     * baseName}. This method must return {@code null} if the given
     * {@code baseName} isn't handled by this provider.
     *
     * @param baseName the base name of the resource bundle
     * @return a {@code ResourceBundle.Control} instance,
     *         or {@code null} if the given {@code baseName} is not
     *         applicable to this provider.
     * @throws NullPointerException if {@code baseName} is {@code null}
     */
    public ResourceBundle.Control getControl(String baseName);
}