1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17
18package android.filterfw.core;
19
20import android.filterfw.core.Filter;
21import android.filterfw.core.FilterGraph;
22
23/**
24 * @hide
25 */
26public abstract class Scheduler {
27    // All methods are core internal methods as Scheduler internals are only used by the GraphRunner.
28
29    private FilterGraph mGraph;
30
31    Scheduler(FilterGraph graph) {
32        mGraph = graph;
33    }
34
35    FilterGraph getGraph() {
36        return mGraph;
37    }
38
39    abstract void reset();
40
41    abstract Filter scheduleNextNode();
42
43    boolean finished() {
44        // TODO: Check that the state of all nodes is FINISHED.
45        return true;
46    }
47}
48