source: branches/autoquest-core-tasktrees-alignment/src/main/java/de/ugoe/cs/autoquest/tasktrees/treeimpl/SelectionInstance.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.treeimpl;

import de.ugoe.cs.autoquest.tasktrees.treeifc.ISelection;
import de.ugoe.cs.autoquest.tasktrees.treeifc.ISelectionInstance;
import de.ugoe.cs.autoquest.tasktrees.treeifc.ITask;
import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance;

/**
 * <p>
 * Default implementation of {@link ISelectionInstance}.
 * </p>
 * 
 * @author Patrick Harms
 */
class SelectionInstance extends TaskInstance implements ISelectionInstance {

        /**
         * <p>
         * default serial version UID
         * </p>
         */
        private static final long serialVersionUID = 1L;

        /**
         * <p>
         * the child of this task instance
         * </p>
         */
        private ITaskInstance child;

        /**
         * <p>
         * initializes this instance with the respective task model
         * </p>
         *
         * @param task
         *            the task of which this is an instance
         */
        SelectionInstance(ITask task) {
                super(task);
        }

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.autoquest.tasktrees.treeimpl.ISequenceInstance#clone()
         */
        @Override
        public synchronized ISelectionInstance clone() {
                final SelectionInstance clone = (SelectionInstance) super.clone();

                if (child != null) {
                        clone.child = child.clone();
                }

                return clone;
        }

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ISelectionInstance#getChild()
         */
        @Override
        public ITaskInstance getChild() {
                return child;
        }

        /*
         * (non-Javadoc)
         * 
         * @see
         * de.ugoe.cs.autoquest.tasktrees.treeifc.ISelectionInstance#getSelection()
         */
        @Override
        public ISelection getSelection() {
                return (ISelection) super.getTask();
        }

        /**
         * <p>
         * used to set the child of this task instance
         * </p>
         * 
         * @param child
         *            the new child of this instance
         */
        void setChild(ITaskInstance child) {
                if (child instanceof ISelectionInstance) {
                        throw new IllegalArgumentException(
                                        "the child of a selection can not be a selection");
                }

                this.child = child;
        }

}