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

import java.io.Serializable;

/**
 * <p>
 * represents a serializable and iterable representation of a read only list of
 * task instances. The list is ordered. It does not provide methods for changing
 * it.
 * </p>
 * 
 * @author Patrick Harms
 */
public interface ITaskInstanceList extends Cloneable, Serializable,
                Iterable<ITaskInstance> {

        /**
         * <p>
         * returns the task instance at the position with the given index. May throw
         * an exception if the index is invalid.
         * </p>
         * 
         * @param index
         *            the index of the task instance to be returned
         * 
         * @return the task instance at the given index
         */
        public ITaskInstance get(int index);

        /**
         * <p>
         * returns the size of the list, i.e. the number of task instances in the
         * list
         * </p>
         * 
         * @return as described
         */
        public int size();

}