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/*
* Copyright (C) 2016 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.tv.data;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import android.util.Log;
import com.android.tv.data.Program.CriticScore;
import com.android.tv.dvr.data.RecordedProgram;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.List;
/**
* A utility class to parse and store data from the
* {@link android.media.tv.TvContract.Programs#COLUMN_INTERNAL_PROVIDER_DATA} field in the
* {@link android.media.tv.TvContract.Programs}.
*/
public final class InternalDataUtils {
private static final boolean DEBUG = false;
private static final String TAG = "InternalDataUtils";
private InternalDataUtils() {
//do nothing
}
/**
* Deserializes a byte array into objects to be stored in the Program class.
*
* <p> Series ID and critic scores are loaded from the bytes.
*
* @param bytes the bytes to be deserialized
* @param builder the builder for the Program class
*/
public static void deserializeInternalProviderData(byte[] bytes, Program.Builder builder) {
if (bytes == null || bytes.length == 0) {
return;
}
try (ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bytes))) {
builder.setSeriesId((String) in.readObject());
builder.setCriticScores((List<CriticScore>) in.readObject());
} catch (NullPointerException e) {
Log.e(TAG, "no bytes to deserialize");
} catch (IOException e) {
Log.e(TAG, "Could not deserialize internal provider contents");
} catch (ClassNotFoundException e) {
Log.e(TAG, "class not found in internal provider contents");
}
}
/**
* Convenience method for converting relevant data in Program class to a serialized blob type
* for storage in internal_provider_data field.
* @param program the program which contains the objects to be serialized
* @return serialized blob-type data
*/
@Nullable
public static byte[] serializeInternalProviderData(Program program) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try (ObjectOutputStream out = new ObjectOutputStream(bos)) {
if (!TextUtils.isEmpty(program.getSeriesId()) || program.getCriticScores() != null) {
out.writeObject(program.getSeriesId());
out.writeObject(program.getCriticScores());
return bos.toByteArray();
}
} catch (IOException e) {
Log.e(TAG, "Could not serialize internal provider contents for program: "
+ program.getTitle());
}
return null;
}
/**
* Deserializes a byte array into objects to be stored in the RecordedProgram class.
*
* <p> Series ID is loaded from the bytes.
*
* @param bytes the bytes to be deserialized
* @param builder the builder for the RecordedProgram class
*/
public static void deserializeInternalProviderData(byte[] bytes,
RecordedProgram.Builder builder) {
if (bytes == null || bytes.length == 0) {
return;
}
try (ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bytes))) {
builder.setSeriesId((String) in.readObject());
} catch (NullPointerException e) {
Log.e(TAG, "no bytes to deserialize");
} catch (IOException e) {
Log.e(TAG, "Could not deserialize internal provider contents");
} catch (ClassNotFoundException e) {
Log.e(TAG, "class not found in internal provider contents");
}
}
/**
* Serializes relevant objects in {@link android.media.tv.TvContract.Programs} to byte array.
* @return the serialized byte array
*/
public static byte[] serializeInternalProviderData(RecordedProgram program) {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try (ObjectOutputStream out = new ObjectOutputStream(bos)) {
if (!TextUtils.isEmpty(program.getSeriesId())) {
out.writeObject(program.getSeriesId());
return bos.toByteArray();
}
} catch (IOException e) {
Log.e(TAG, "Could not serialize internal provider contents for program: "
+ program.getTitle());
}
return null;
}
}
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