/* 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 org.riotfamily.common.util;

import java.lang.reflect.InvocationTargetException;

public final class ExceptionUtils {

	private ExceptionUtils() {
	}
	
	public static RuntimeException wrapReflectionException(Exception ex) {
		if (ex instanceof NoSuchMethodException) {
			return new IllegalStateException("Method not found: " + ex.getMessage(), ex);
		}
		if (ex instanceof IllegalAccessException) {
			return new IllegalStateException("Could not access method: " + ex.getMessage(), ex);
		}
		if (ex instanceof InvocationTargetException) {
			return wrapInvocationTargetException((InvocationTargetException) ex);
		}
		return wrapThrowable(ex);
	}

	private static RuntimeException wrapInvocationTargetException(InvocationTargetException ex) {
		Throwable target = ex.getTargetException();
		return wrapThrowable(target);
	}
	
	public static RuntimeException wrapThrowable(Throwable t) {
		if (t instanceof RuntimeException) {
			return (RuntimeException) t;
		}
		if (t instanceof Error) {
			throw (Error) t;
		}
		return new IllegalStateException("Unexpected exception", t);
	}
}