com.liferay.portal.kernel.util.AggregateResourceBundleLoader.java Source code

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Here is the source code for com.liferay.portal.kernel.util.AggregateResourceBundleLoader.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.util;

import com.liferay.petra.string.StringPool;

import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

/**
 * @author Carlos Sierra Andrs
 */
public class AggregateResourceBundleLoader implements ResourceBundleLoader {

    public AggregateResourceBundleLoader(ResourceBundleLoader... resourceBundleLoaders) {

        for (int i = 0; i < resourceBundleLoaders.length; i++) {
            if (resourceBundleLoaders[i] == null) {
                throw new NullPointerException("Null resource bundle loader at index " + i);
            }
        }

        _resourceBundleLoaders = resourceBundleLoaders;
    }

    @Override
    public ResourceBundle loadResourceBundle(Locale locale) {
        List<ResourceBundle> resourceBundles = new ArrayList<>();

        for (ResourceBundleLoader resourceBundleLoader : _resourceBundleLoaders) {

            try {
                ResourceBundle resourceBundle = resourceBundleLoader.loadResourceBundle(locale);

                if (resourceBundle != null) {
                    resourceBundles.add(resourceBundle);
                }
            } catch (Exception e) {
            }
        }

        if (resourceBundles.isEmpty()) {
            String languageId = LocaleUtil.toLanguageId(locale);

            throw new MissingResourceException(StringBundler.concat("Resource bundle loader ", String.valueOf(this),
                    " was unable to load resource bundle for ", languageId), StringPool.BLANK, languageId);
        }

        if (resourceBundles.size() == 1) {
            return resourceBundles.get(0);
        }

        return new AggregateResourceBundle(resourceBundles.toArray(new ResourceBundle[0]));
    }

    private final ResourceBundleLoader[] _resourceBundleLoaders;

}