| <?php |
| /** |
| * File containing the ezcWorkflowVisitorVerification class. |
| * |
| * 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. |
| * |
| * @package Workflow |
| * @version //autogen// |
| * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0 |
| */ |
| |
| /** |
| * An implementation of the ezcWorkflowVisitor interface that |
| * verifies a workflow specification. |
| * |
| * This visitor should not be used directly but will be used by the |
| * verify() method on the workflow. |
| * |
| * <code> |
| * <?php |
| * $workflow->verify(); |
| * ?> |
| * </code> |
| * |
| * The verifier checks that: |
| * - there is only one start node |
| * - there is only one finally node |
| * - each node satisfies the constraints of the respective node type |
| * |
| * @package Workflow |
| * @version //autogen// |
| */ |
| class ezcWorkflowVisitorVerification extends ezcWorkflowVisitor |
| { |
| /** |
| * Holds the number of start nodes encountered during visiting. |
| * |
| * @var integer |
| */ |
| protected $numStartNodes = 0; |
| |
| /** |
| * Holds the number of finally nodes encountered during visiting. |
| * |
| * @var integer |
| */ |
| protected $numFinallyNodes = 0; |
| |
| /** |
| * Perform the visit. |
| * |
| * @param ezcWorkflowVisitable $visitable |
| */ |
| protected function doVisit( ezcWorkflowVisitable $visitable ) |
| { |
| if ( $visitable instanceof ezcWorkflow ) |
| { |
| foreach ( $visitable->nodes as $node ) |
| { |
| if ( $node instanceof ezcWorkflowNodeStart && |
| !$node instanceof ezcWorkflowNodeFinally ) |
| { |
| $this->numStartNodes++; |
| |
| if ( $this->numStartNodes > 1 ) |
| { |
| throw new ezcWorkflowInvalidWorkflowException( |
| 'A workflow may have only one start node.' |
| ); |
| } |
| } |
| |
| if ( $node instanceof ezcWorkflowNodeFinally ) |
| { |
| $this->numFinallyNodes++; |
| |
| if ( $this->numFinallyNodes > 1 ) |
| { |
| throw new ezcWorkflowInvalidWorkflowException( |
| 'A workflow may have only one finally node.' |
| ); |
| } |
| } |
| } |
| } |
| |
| if ( $visitable instanceof ezcWorkflowNode ) |
| { |
| $visitable->verify(); |
| } |
| } |
| } |
| ?> |