/*

 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.

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

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * 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).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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/*

 *

 * (C) Copyright Taligent, Inc. 1996, 1997 - All Rights Reserved

 * (C) Copyright IBM Corp. 1996 - 2002 - All Rights Reserved

 *

 * The original version of this source code and documentation

 * is copyrighted and owned by Taligent, Inc., a wholly-owned

 * subsidiary of IBM. These materials are provided under terms

 * of a License Agreement between Taligent and Sun. This technology

 * is protected by multiple US and International patents.

 *

 * This notice and attribution to Taligent may not be removed.

 * Taligent is a registered trademark of Taligent, Inc.

 */

package sun.util.locale.provider;

import java.text.Collator;

import java.text.ParseException;

import java.text.RuleBasedCollator;

import java.text.spi.CollatorProvider;

import java.util.Locale;

import java.util.Set;

/**

 * Concrete implementation of the

 * {@link java.text.spi.CollatorProvider CollatorProvider} class

 * for the JRE LocaleProviderAdapter.

 */

public class CollatorProviderImpl extends CollatorProvider implements AvailableLanguageTags {

    private final LocaleProviderAdapter.Type type;

    private final Set<String> langtags;

    public CollatorProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) {

        this.type = type;

        this.langtags = langtags;

    }

    /**

     * Returns an array of all locales for which this locale service provider

     * can provide localized objects or names.

     *

     * @return An array of all locales for which this locale service provider

     * can provide localized objects or names.

     */

    @Override

    public Locale[] getAvailableLocales() {

        return LocaleProviderAdapter.toLocaleArray(langtags);

    }

    @Override

    public boolean isSupportedLocale(Locale locale) {

        return LocaleProviderAdapter.forType(type).isSupportedProviderLocale(locale, langtags);

    }

    /**

     * Returns a new <code>Collator</code> instance for the specified locale.

     * @param locale the desired locale.

     * @return the <code>Collator</code> for the desired locale.

     * @exception NullPointerException if

     * <code>locale</code> is null

     * @exception IllegalArgumentException if <code>locale</code> isn't

     *     one of the locales returned from

     *     {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()

     *     getAvailableLocales()}.

     * @see java.text.Collator#getInstance(java.util.Locale)

     */

    @Override

    public Collator getInstance(Locale locale) {

        if (locale == null) {

            throw new NullPointerException();

        }

        Collator result = null;

        // Load the resource of the desired locale from resource

        // manager.

        String colString = LocaleProviderAdapter.forType(type).getLocaleResources(locale).getCollationData();

        try

        {

            result = new RuleBasedCollator(CollationRules.DEFAULTRULES +

                                           colString);

        }

        catch(ParseException foo)

        {

            // predefined tables should contain correct grammar

            try {

                result = new RuleBasedCollator(CollationRules.DEFAULTRULES);

            } catch (ParseException bar) {

                // the default rules should always be parsable.

                throw new InternalError(bar);

            }

        }

        // Now that RuleBasedCollator adds expansions for pre-composed characters

        // into their decomposed equivalents, the default collators don't need

        // to have decomposition turned on.  Laura, 5/5/98, bug 4114077

        result.setDecomposition(Collator.NO_DECOMPOSITION);

        return (Collator)result.clone();

    }

    @Override

    public Set<String> getAvailableLanguageTags() {

        return langtags;

    }

}