com.assemblade.utils.localisation.Localiser.java Source code

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Here is the source code for com.assemblade.utils.localisation.Localiser.java

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/*
 * Copyright 2012 Mike Adamson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.assemblade.utils.localisation;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import java.util.Properties;

public class Localiser {
    private Log log = LogFactory.getLog(Localiser.class);
    private static Localiser instance;

    private Properties localisedStrings;

    public static Localiser getInstance() {
        if (instance == null) {
            instance = new Localiser();
        }
        return instance;
    }

    private Localiser() {
        localisedStrings = new Properties();

        Locale current = Locale.getDefault();

        String language = current.getLanguage();

        String propertyFile = language + ".properties";

        InputStream is = Localiser.class.getClassLoader().getResourceAsStream(propertyFile);

        if (is != null) {
            propertyFile = "en.properties";
            is = Localiser.class.getClassLoader().getResourceAsStream(propertyFile);
        }
        if (is != null) {
            try {
                localisedStrings.load(is);
            } catch (IOException e) {
                log.error("Failed to load localised properties from resource: " + propertyFile, e);
            }
        } else {
            log.error("Could not find default localisation property file: " + propertyFile);
        }
    }

    public String translate(String string) {
        return localisedStrings.getProperty(string, string);
    }

}