/* ********************************************************************** **
** Copyright notice **
** **
** (c) 2005-2009 RSSOwl Development Team **
** http://www.rssowl.org/ **
** **
** 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.rssowl.org/legal/epl-v10.html **
** **
** A copy is found in the file epl-v10.html and important notices to the **
** license from the team is found in the textfile LICENSE.txt distributed **
** in this package. **
** **
** This copyright notice MUST APPEAR in all copies of the file! **
** **
** Contributors: **
** RSSOwl Development Team - initial API and implementation **
** **
** ********************************************************************** */
package org.rssowl.core.internal.persist.migration;
import java.lang.reflect.Field;
/**
* Some helpers around Migrations.
*/
final class MigrationHelper {
static Object getFieldValue(Object object, String fieldName) {
try {
return getField(object, fieldName).get(object);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException(e);
}
}
static Field getField(Object object, String fieldName) {
Class<?> klass = object.getClass();
while (klass != Object.class) {
for (Field field : klass.getDeclaredFields()) {
if (field.getName().equals(fieldName)) {
field.setAccessible(true);
return field;
}
}
klass = klass.getSuperclass();
}
throw new IllegalArgumentException("No field with name: " + fieldName); //$NON-NLS-1$
}
static void setField(Object object, String fieldName, Object value) {
try {
Field field = getField(object, fieldName);
field.set(object, value);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException(e);
}
}
}