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I18N support
There is a newer version: 2.2.ga
/**
 * Copyright (C) 2011 Ovea 
 *
 * 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.ovea.i18n;

import java.util.Locale;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

/**
 * @author Mathieu Carbou ([email protected])
 */
public abstract class I18NServiceSkeleton implements I18NService {

    public static enum MissingKeyBehaviour {
        THROW_EXCEPTION,
        RETURN_NULL,
        RETURN_KEY
    }

    private final ConcurrentMap cache = new ConcurrentHashMap();
    private final String bundleName;
    private final ClassLoader classLoader;

    private boolean debug;
    private MissingKeyBehaviour missingKeyBehaviour = MissingKeyBehaviour.THROW_EXCEPTION;

    protected I18NServiceSkeleton(String bundleName, ClassLoader classLoader) {
        this.bundleName = bundleName.startsWith("/") ? bundleName.substring(1) : bundleName;
        this.classLoader = classLoader;
    }

    public MissingKeyBehaviour getMissingKeyBehaviour() {
        return missingKeyBehaviour;
    }

    public void setMissingKeyBehaviour(MissingKeyBehaviour missingKeyBehaviour) {
        this.missingKeyBehaviour = missingKeyBehaviour;
    }

    public boolean isDebug() {
        return debug;
    }

    public void setDebug(boolean debug) {
        this.debug = debug;
    }

    @Override
    public final I18NBundle forLocale(Locale locale) {
        I18NBundle bundle = cache.get(locale);
        if (bundle == null) {
            cache.putIfAbsent(locale, newBundle(bundleName, classLoader, locale));
            bundle = cache.get(locale);
        }
        return bundle;
    }

    @Override
    public final String toString() {
        return bundleName;
    }

    abstract I18NBundle newBundle(String bundleName, ClassLoader classLoader, Locale locale);

}