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/*
* Copyright (C) 2018 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.example.android.systemupdatersample;
import android.os.Parcel;
import android.os.Parcelable;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.File;
import java.io.Serializable;
/**
* UpdateConfig describes an update. It will be parsed from JSON, which is intended to
* be sent from server to the update app, but in this sample app it will be stored on the device.
*/
public class UpdateConfig implements Parcelable {
public static final int TYPE_NON_STREAMING = 0;
public static final int TYPE_STREAMING = 1;
public static final Parcelable.Creator<UpdateConfig> CREATOR =
new Parcelable.Creator<UpdateConfig>() {
@Override
public UpdateConfig createFromParcel(Parcel source) {
return new UpdateConfig(source);
}
@Override
public UpdateConfig[] newArray(int size) {
return new UpdateConfig[size];
}
};
/** parse update config from json */
public static UpdateConfig fromJson(String json) throws JSONException {
UpdateConfig c = new UpdateConfig();
JSONObject o = new JSONObject(json);
c.mName = o.getString("name");
c.mUrl = o.getString("url");
if (TYPE_NON_STREAMING_JSON.equals(o.getString("type"))) {
c.mInstallType = TYPE_NON_STREAMING;
} else if (TYPE_STREAMING_JSON.equals(o.getString("type"))) {
c.mInstallType = TYPE_STREAMING;
} else {
throw new JSONException("Invalid type, expected either "
+ "NON_STREAMING or STREAMING, got " + o.getString("type"));
}
if (o.has("metadata")) {
c.mMetadata = new Metadata(
o.getJSONObject("metadata").getInt("offset"),
o.getJSONObject("metadata").getInt("size"));
}
c.mRawJson = json;
return c;
}
/**
* these strings are represent types in JSON config files
*/
private static final String TYPE_NON_STREAMING_JSON = "NON_STREAMING";
private static final String TYPE_STREAMING_JSON = "STREAMING";
/** name will be visible on UI */
private String mName;
/** update zip file URI, can be https:// or file:// */
private String mUrl;
/** non-streaming (first saves locally) OR streaming (on the fly) */
private int mInstallType;
/** metadata is required only for streaming update */
private Metadata mMetadata;
private String mRawJson;
protected UpdateConfig() {
}
protected UpdateConfig(Parcel in) {
this.mName = in.readString();
this.mUrl = in.readString();
this.mInstallType = in.readInt();
this.mMetadata = (Metadata) in.readSerializable();
this.mRawJson = in.readString();
}
public UpdateConfig(String name, String url, int installType) {
this.mName = name;
this.mUrl = url;
this.mInstallType = installType;
}
public String getName() {
return mName;
}
public String getUrl() {
return mUrl;
}
public String getRawJson() {
return mRawJson;
}
public int getInstallType() {
return mInstallType;
}
/**
* "url" must be the file located on the device.
*
* @return File object for given url
*/
public File getUpdatePackageFile() {
if (mInstallType != TYPE_NON_STREAMING) {
throw new RuntimeException("Expected non-streaming install type");
}
if (!mUrl.startsWith("file://")) {
throw new RuntimeException("url is expected to start with file://");
}
return new File(mUrl.substring(7, mUrl.length()));
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(mName);
dest.writeString(mUrl);
dest.writeInt(mInstallType);
dest.writeSerializable(mMetadata);
dest.writeString(mRawJson);
}
/**
* Metadata for STREAMING update
*/
public static class Metadata implements Serializable {
private static final long serialVersionUID = 31042L;
/** defines beginning of update data in archive */
private long mOffset;
/** size of the update data in archive */
private long mSize;
public Metadata(long offset, long size) {
this.mOffset = offset;
this.mSize = size;
}
public long getOffset() {
return mOffset;
}
public long getSize() {
return mSize;
}
}
}
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