source: trunk/autoquest-core-usability-evaluation/src/main/java/de/ugoe/cs/autoquest/usability/taskmodel/filter/TaskModelFilter.java @ 1290

//   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.usability.taskmodel.filter;

import com.google.common.base.Predicate;

import de.ugoe.cs.autoquest.eventcore.IEventTarget;
import de.ugoe.cs.autoquest.eventcore.IEventType;
import de.ugoe.cs.autoquest.tasktrees.treeifc.ITask;
import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskModel;
import de.ugoe.cs.autoquest.usability.taskmodel.filter.types.EventTargetFilter;
import de.ugoe.cs.autoquest.usability.taskmodel.filter.types.EventTypeFilter;
import de.ugoe.cs.autoquest.usability.taskmodel.filter.types.TaskTypeFilter;

/**
 * <p>
 * TODO comment
 * </p>
 * 
 * @author Alexander Deicke
 */
public class TaskModelFilter implements ITaskModelFilter {

        private BFSTaskModelIterator taskModelIterator;

        private FilterResult filterStatistic;

        @SuppressWarnings("unchecked")
        @Override
        public FilterResult filter(ITaskModel taskModel,
                        EventTargetFilter eventTarget) {
                Predicate<IEventTarget> filterPredicate = eventTarget.filterPredicate();
                return setup(taskModel, filterPredicate);
        }

        @SuppressWarnings("unchecked")
        @Override
        public FilterResult filter(ITaskModel taskModel, EventTypeFilter eventType) {
                Predicate<IEventType> filterPredicate = eventType.filterPredicate();
                return setup(taskModel, filterPredicate);
        }

        @SuppressWarnings("unchecked")
        @Override
        public FilterResult filter(ITaskModel taskModel, TaskTypeFilter nodeType) {
                Predicate<ITask> filterPredicate = nodeType.filterPredicate();
                return setup(taskModel, filterPredicate);
        }

        private FilterResult setup(ITaskModel taskModel,
                        Predicate<?> filterPredicate) {
                this.filterStatistic = new FilterResult(filterPredicate);
                this.taskModelIterator = BFSTaskModelIterator.iterator(taskModel);
                traverse(taskModel);
                return this.filterStatistic;
        }

        private void traverse(ITaskModel taskModel) {
                while (this.taskModelIterator.hasNext()) {
                        ITask task = this.taskModelIterator.next();
                        this.filterStatistic.addTask(task);
                }
        }
}