TaskDetailPrinter.java 文件源码

private ListMultimap<Class, Task> groupTasksByType(List<Task> tasks) {
    final Set<Class> taskTypes = new TreeSet<Class>(new Comparator<Class>() {
        public int compare(Class o1, Class o2) {
            return o1.getSimpleName().compareTo(o2.getSimpleName());
        }
    });
    taskTypes.addAll(collect(tasks, new Transformer<Class, Task>() {
        public Class transform(Task original) {
            return getDeclaredTaskType(original);
        }
    }));

    ListMultimap<Class, Task> tasksGroupedByType = ArrayListMultimap.create();
    for (final Class taskType : taskTypes) {
        tasksGroupedByType.putAll(taskType, filter(tasks, new Spec<Task>() {
            public boolean isSatisfiedBy(Task element) {
                return getDeclaredTaskType(element).equals(taskType);
            }
        }));
    }
    return tasksGroupedByType;
}