I18n.java

package org.objectweb.jonas_lib;

import java.text.MessageFormat;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;


public class I18n {

    private static final String RESOURCE_BUNDLE_NAME = "I18n";

    private static Map bundles = null;

    private ResourceBundle resourceBundle = null;

    private I18n(String packageName, ClassLoader cl) {

        String bundleName = packageName + "." + RESOURCE_BUNDLE_NAME;

        // Resource bundle is on the form packagename.I18n.properties
        try {
            Locale locale = Locale.getDefault();
            resourceBundle = ResourceBundle.getBundle(bundleName, locale, cl);
        } catch (MissingResourceException mre) {
                String err = "Error when trying to get a ResourceBundle for package '" + packageName + "' : " + mre.getMessage();
                throw new IllegalStateException(err);
        }
    }

    public static I18n getInstance(Class c) {
        return getInstance(c.getPackage().getName());
    }

    public static I18n getInstance(Class c, ClassLoader cl) {
        return getInstance(c.getPackage().getName(), cl);
    }

    public static I18n getInstance(String packageName) {
        return getInstance(packageName, Thread.currentThread().getContextClassLoader());
    }

    public static I18n getInstance(String packageName, ClassLoader cl) {
        if (bundles == null) {
            bundles = new HashMap();
        }

        I18n i18n = (I18n) bundles.get(packageName);
        if (i18n != null) {
            return i18n;
        }


        i18n = new I18n(packageName, cl);
        bundles.put(packageName, i18n);
        return i18n;
    }

    public String getMessage(String key, Object[] args) {
        String value = getMessage(key);
        return MessageFormat.format(value, args);
    }


    public String getMessage(String key) {
        String ret = null;

        // No bundle, return key
        if (resourceBundle == null) {
            return key;
        }

        try {
            ret = resourceBundle.getString(key);
        } catch (MissingResourceException mre) {
            // key not found, return the key
            ret = key;
        }

        return ret;
    }

    public String getMessage(String key, Object obj) {
        return getMessage(key, new Object[] {obj});
    }


    public String getMessage(String key, Object obj1, Object obj2) {
        return getMessage(key, new Object[] {obj1, obj2 });
    }

    public String getMessage(String key, Object obj1, Object obj2, Object obj3) {
        return getMessage(key, new Object[] {obj1, obj2, obj3 });
    }


    public String getMessage(String key, Object obj1, Object obj2, Object obj3, Object obj4) {
        return getMessage(key, new Object[] {obj1, obj2, obj3, obj4 });
    }


    public String getMessage(String key, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5) {
        return getMessage(key, new Object[] {obj1, obj2, obj3, obj4, obj5 });
    }


    public String getMessage(String key, Object obj1, Object obj2, Object obj3, Object obj4, Object obj5, Object obj6) {
        return getMessage(key, new Object[] {obj1, obj2, obj3, obj4, obj5, obj6 });
    }

}

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