diff options
Diffstat (limited to 'src/com/android/gallery3d/filtershow/pipeline/ProcessingTask.java')
-rw-r--r-- | src/com/android/gallery3d/filtershow/pipeline/ProcessingTask.java | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/pipeline/ProcessingTask.java b/src/com/android/gallery3d/filtershow/pipeline/ProcessingTask.java new file mode 100644 index 000000000..8d3e8110f --- /dev/null +++ b/src/com/android/gallery3d/filtershow/pipeline/ProcessingTask.java @@ -0,0 +1,88 @@ +/* + * Copyright (C) 2013 The Android Open Source Project + * + * 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 com.android.gallery3d.filtershow.pipeline; + +import android.content.Context; +import android.os.Handler; +import android.os.Message; + +public abstract class ProcessingTask { + private ProcessingTaskController mTaskController; + private Handler mProcessingHandler; + private Handler mResultHandler; + private int mType; + private static final int DELAY = 300; + + static interface Request {} + static interface Update {} + static interface Result {} + + public boolean postRequest(Request message) { + Message msg = mProcessingHandler.obtainMessage(mType); + msg.obj = message; + if (isPriorityTask()) { + if (mProcessingHandler.hasMessages(getType())) { + return false; + } + mProcessingHandler.sendMessageAtFrontOfQueue(msg); + } else if (isDelayedTask()) { + if (mProcessingHandler.hasMessages(getType())) { + mProcessingHandler.removeMessages(getType()); + } + mProcessingHandler.sendMessageDelayed(msg, DELAY); + } else { + mProcessingHandler.sendMessage(msg); + } + return true; + } + + public void postUpdate(Update message) { + Message msg = mResultHandler.obtainMessage(mType); + msg.obj = message; + msg.arg1 = ProcessingTaskController.UPDATE; + mResultHandler.sendMessage(msg); + } + + public void processRequest(Request message) { + Object result = doInBackground(message); + Message msg = mResultHandler.obtainMessage(mType); + msg.obj = result; + msg.arg1 = ProcessingTaskController.RESULT; + mResultHandler.sendMessage(msg); + } + + public void added(ProcessingTaskController taskController) { + mTaskController = taskController; + mResultHandler = taskController.getResultHandler(); + mProcessingHandler = taskController.getProcessingHandler(); + mType = taskController.getReservedType(); + } + + public int getType() { + return mType; + } + + public Context getContext() { + return mTaskController.getContext(); + } + + public abstract Result doInBackground(Request message); + public abstract void onResult(Result message); + public void onUpdate(Update message) {} + public boolean isPriorityTask() { return false; } + public boolean isDelayedTask() { return false; } +} |