source: branches/autoquest-core-tasktrees-alignment/src/main/java/de/ugoe/cs/autoquest/tasktrees/treeifc/DefaultTaskInstanceTraversingVisitor.java @ 1733

//   Copyright 2012 Georg-August-Universität Göttingen, Germany
//
//   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 de.ugoe.cs.autoquest.tasktrees.treeifc;

/**
 * <p>
 * Default implementation for a task instance visitor performing a traversal of
 * the instances
 * </p>
 * 
 * @author Patrick Harms
 */
public class DefaultTaskInstanceTraversingVisitor implements
                ITaskInstanceVisitor {

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(
         * IEventTaskInstance)
         */
        @Override
        public void visit(IEventTaskInstance eventTaskInstance) {
                // do nothing
        }

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(
         * IIterationInstance)
         */
        @Override
        public void visit(IIterationInstance iterationInstance) {
                visit((ITaskInstanceList) iterationInstance);
        }

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(
         * IOptionalInstance)
         */
        @Override
        public void visit(IOptionalInstance optionalInstance) {
                if (optionalInstance.getChild() != null) {
                        optionalInstance.getChild().accept(this);
                }
        }

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(
         * ISelectionInstance)
         */
        @Override
        public void visit(ISelectionInstance selectionInstance) {
                selectionInstance.getChild().accept(this);
        }

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(
         * ISequenceInstance)
         */
        @Override
        public void visit(ISequenceInstance sequenceInstance) {
                visit((ITaskInstanceList) sequenceInstance);
        }

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(
         * ITaskInstance)
         */
        @Override
        public void visit(ITaskInstance taskInstance) {
                if (taskInstance instanceof IEventTaskInstance) {
                        visit((IEventTaskInstance) taskInstance);
                } else if (taskInstance instanceof IIterationInstance) {
                        visit((IIterationInstance) taskInstance);
                } else if (taskInstance instanceof IOptionalInstance) {
                        visit((IOptionalInstance) taskInstance);
                } else if (taskInstance instanceof ISelectionInstance) {
                        visit((ISelectionInstance) taskInstance);
                } else if (taskInstance instanceof ISequenceInstance) {
                        visit((ISequenceInstance) taskInstance);
                }
        }

        /**
         * <p>
         * common implementation for traversing task instance lists.
         * </p>
         * 
         * @param taskInstanceList
         *            the task instance list to be traversed
         */
        public void visit(ITaskInstanceList taskInstanceList) {
                for (final ITaskInstance child : taskInstanceList) {
                        child.accept(this);
                }
        }
}