964eb5a68e
* Make final where possible * Remove unused casts, imports, methods, enums and constructors * Add null checks Change-Id: Idd1a16426dd1928e2ed9922f5a35ba32ce4f808b
102 lines
3.2 KiB
Java
102 lines
3.2 KiB
Java
/*
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* Copyright (C) 2017-2022 The LineageOS Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.lineageos.updater.download;
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import java.io.File;
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import java.io.IOException;
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public interface DownloadClient {
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interface DownloadCallback {
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void onResponse(Headers headers);
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void onSuccess();
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void onFailure(boolean cancelled);
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}
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interface ProgressListener {
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void update(long bytesRead, long contentLength, long speed, long eta);
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}
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interface Headers {
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String get(String name);
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}
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/**
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* Start the download. This method has no effect if the download already started.
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*/
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void start();
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/**
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* Resume the download. The download will fail if the server can't fulfil the
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* partial content request and DownloadCallback.onFailure() will be called.
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* This method has no effect if the download already started or the destination
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* file doesn't exist.
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*/
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void resume();
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/**
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* Cancel the download. This method has no effect if the download isn't ongoing.
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*/
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void cancel();
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final class Builder {
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private String mUrl;
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private File mDestination;
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private DownloadClient.DownloadCallback mCallback;
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private DownloadClient.ProgressListener mProgressListener;
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private boolean mUseDuplicateLinks;
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public DownloadClient build() throws IOException {
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if (mUrl == null) {
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throw new IllegalStateException("No download URL defined");
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} else if (mDestination == null) {
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throw new IllegalStateException("No download destination defined");
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} else if (mCallback == null) {
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throw new IllegalStateException("No download callback defined");
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}
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return new HttpURLConnectionClient(mUrl, mDestination, mProgressListener, mCallback,
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mUseDuplicateLinks);
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}
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public Builder setUrl(String url) {
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mUrl = url;
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return this;
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}
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public Builder setDestination(File destination) {
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mDestination = destination;
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return this;
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}
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public Builder setDownloadCallback(DownloadClient.DownloadCallback downloadCallback) {
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mCallback = downloadCallback;
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return this;
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}
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public Builder setProgressListener(DownloadClient.ProgressListener progressListener) {
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mProgressListener = progressListener;
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return this;
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}
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public Builder setUseDuplicateLinks(boolean useDuplicateLinks) {
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mUseDuplicateLinks = useDuplicateLinks;
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return this;
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}
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}
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}
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