org.pentaho.platform.repository2.unified.jcr.LocalizationUtil.java Source code

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Here is the source code for org.pentaho.platform.repository2.unified.jcr.LocalizationUtil.java

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/*
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License, version 2 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/gpl-2.0.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program 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 for more details.
 *
 *
 * Copyright 2006 - 2013 Pentaho Corporation.  All rights reserved.
 */

package org.pentaho.platform.repository2.unified.jcr;

import org.apache.commons.lang.StringUtils;
import org.springframework.util.Assert;

import java.util.Locale;
import java.util.Map;
import java.util.Properties;

/**
 * @author Rowell Belen
 */
public class LocalizationUtil {

    private Map<String, Properties> localePropertiesMap;
    private Locale locale;

    public static final String DEFAULT = "default";

    public LocalizationUtil(Map<String, Properties> localePropertiesMap, Locale locale) {
        Assert.notNull(localePropertiesMap);
        this.localePropertiesMap = localePropertiesMap;
        this.locale = locale;
    }

    public String resolveLocalizedString(final String propertyName, final String defaultValue) {

        String localizedString;

        if (this.locale != null) {
            // find locale (language & country) - example: en_US
            localizedString = findLocalizedString(this.locale.toString(), propertyName);
            if (StringUtils.isNotBlank(localizedString)) {
                return localizedString;
            }

            // find locale (language only) - example: en
            localizedString = findLocalizedString(this.locale.getLanguage(), propertyName);
            if (StringUtils.isNotBlank(localizedString)) {
                return localizedString;
            }
        }

        // find default locale if provided locale is not found
        localizedString = findLocalizedString(DEFAULT, propertyName);
        if (StringUtils.isNotBlank(localizedString)) {
            return localizedString;
        }

        // return default value if provided/default locales are not found
        return defaultValue;
    }

    private String findLocalizedString(final String locale, final String propertyName) {

        String localeString = locale;
        if (StringUtils.isBlank(localeString)) {
            localeString = DEFAULT;
        }

        if (this.localePropertiesMap != null) {
            Properties localeProperties = this.localePropertiesMap.get(localeString);
            if (localeProperties != null && !localeProperties.isEmpty()) {
                return localeProperties.getProperty(propertyName); // found localized string in map
            }
        }

        return null;
    }
}