NLSHelperImpl.java

/**************************************************************************************************
 * Copyright (c) 2011 Mihail Atanassov. All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0 which accompanies this
 * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
 * <p/>
 * Contributors: Mihail Atanassov - initial API and implementation
 *************************************************************************************************/
package de.uni_koeln.ub.drc.ui.facades;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

/**
 * @author Mihail Atanassov (matana)
 */
public class NLSHelperImpl extends NLSHelper {

	@Override
	protected Object getMessagesInternal(final Class<?> clazz) {
		ClassLoader loader = clazz.getClassLoader();
		ResourceBundle bundle = ResourceBundle.getBundle(BUNDLE_NAME,
				Locale.getDefault(), loader);
		return internalGet(bundle, clazz);
	}

	private Object internalGet(final ResourceBundle bundle, final Class<?> clazz) {
		Object result;
		try {
			Constructor<?> constructor = clazz
					.getDeclaredConstructor((Class<?>[]) null);
			constructor.setAccessible(true);
			result = constructor.newInstance((Object[]) null);
		} catch (final Exception ex) {
			throw new IllegalStateException(ex.getMessage());
		}
		final Field[] fieldArray = clazz.getDeclaredFields();
		for (int i = 0; i < fieldArray.length; i++) {
			try {
				int mod = fieldArray[i].getModifiers();
				if (String.class.isAssignableFrom(fieldArray[i].getType())
						&& Modifier.isPublic(mod) && !Modifier.isStatic(mod)) {
					try {
						String value = bundle
								.getString(fieldArray[i].getName());
						if (value != null) {
							fieldArray[i].setAccessible(true);
							fieldArray[i].set(result, value);
						}
					} catch (final MissingResourceException mre) {
						fieldArray[i].setAccessible(true);
						fieldArray[i].set(result, ""); //$NON-NLS-1$
						mre.printStackTrace();
					}
				}
			} catch (final Exception ex) {
				ex.printStackTrace();
			}
		}
		return result;
	}
}