XMLResourceBundle.java

/*
 * #%L
 * Wisdom-Framework
 * %%
 * Copyright (C) 2013 - 2014 Wisdom Framework
 * %%
 * 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.
 * #L%
 */
package org.wisdom.i18n;

import java.io.IOException;
import java.io.InputStream;
import java.util.*;

/**
 * {@link ResourceBundle} implementation for XML files. This class just reads a
 * XML file (Properties), and wraps this {@link Properties} object as a
 * {@link ResourceBundle}.
 */
public class XMLResourceBundle extends ResourceBundle {
    /**
     * The wrapped properties.
     */
    private Properties properties;

    /**
     * Creates a XMLResourceBundle.
     * @param stream the input stream
     * @throws IOException if the {@link Properties} cannot be created
     * correctly.
     */
    XMLResourceBundle(InputStream stream) throws IOException {
        properties = new Properties();
        properties.loadFromXML(stream);
    }

    /**
     * Gets the localized string for the given key.
     * @param key the key
     * @return the localized string
     * @see java.util.ResourceBundle#handleGetObject(java.lang.String)
     */
    protected Object handleGetObject(String key) {
        return properties.getProperty(key);
    }

    /**
     * Gets the keys from the wrapped properties.
     * @return the set of key.
     * @see java.util.ResourceBundle#getKeys()
     */
    public Enumeration<String> getKeys() {
        Set<String> handleKeys = properties.stringPropertyNames();
        return Collections.enumeration(handleKeys);
    }
}