WorkflowPermissionAdvice.java

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.workflow;

import com.liferay.portal.kernel.security.auth.PrincipalException;
import com.liferay.portal.kernel.security.permission.PermissionChecker;
import com.liferay.portal.kernel.security.permission.PermissionThreadLocal;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;

/**
 * @author Brian Wing Shun Chan
 */
public class WorkflowPermissionAdvice {

	public Object invoke(ProceedingJoinPoint proceedingJoinPoint)
		throws Throwable {

		Signature signature = proceedingJoinPoint.getSignature();

		String methodName = signature.getName();

		Object[] arguments = proceedingJoinPoint.getArgs();

		if (methodName.equals(_ASSIGN_WORKFLOW_TASK_TO_USER_METHOD_NAME)) {
			long userId = (Long)arguments[1];

			PermissionChecker permissionChecker =
				PermissionThreadLocal.getPermissionChecker();

			if (permissionChecker.getUserId() != userId) {
				throw new PrincipalException();
			}
		}

		return proceedingJoinPoint.proceed();
	}

	private static final String _ASSIGN_WORKFLOW_TASK_TO_USER_METHOD_NAME =
		"assignWorkflowTaskToUser";

}