| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| * |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.lenya.workflow; |
| |
| /** |
| * <p>A condition can prevent a transition from firing, |
| * based on the current situation. Examples:</p> |
| * <ul> |
| * <li>Does the current user have a certain role on the current URL?</li> |
| * <li>Does a certain state variable have a certain value (e.g., is the document published)? (BooleanVariableCondition)<li> |
| * <li>Is the sun shining? (e.g., if the weather report may only be published on sunny days)</li> |
| * </ul> |
| */ |
| public interface Condition { |
| |
| /** |
| * Returns if the condition is complied in a certain situation. |
| * @param workflow The workflow to use. |
| * @param workflowable The workflowable to check the condition on. |
| * @return if the condition is complied. |
| * @throws WorkflowException when the expression could not be evaluated. |
| */ |
| boolean isComplied(Workflow workflow, Workflowable workflowable) throws WorkflowException; |
| |
| /** Sets the expression for this condition. |
| * @param expression The expression. |
| * @throws WorkflowException when the expression is not valid. |
| */ |
| void setExpression(String expression) throws WorkflowException; |
| } |