Removed our re-implementation of 'Optimal' and used the RxJava equivalent instead
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ByteHamster
parent
d444e8d23e
commit
e59767890e
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@ -16,6 +16,7 @@ import android.widget.AdapterView;
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import android.widget.ArrayAdapter;
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import android.widget.TextView;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.annotation.UiThread;
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import androidx.appcompat.app.AlertDialog;
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import androidx.appcompat.app.AppCompatActivity;
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@ -51,7 +52,6 @@ import de.danoeh.antennapod.core.syndication.handler.UnsupportedFeedtypeExceptio
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import de.danoeh.antennapod.core.util.DownloadError;
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import de.danoeh.antennapod.core.util.FileNameGenerator;
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import de.danoeh.antennapod.core.util.IntentUtils;
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import de.danoeh.antennapod.core.util.Optional;
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import de.danoeh.antennapod.core.util.StorageUtils;
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import de.danoeh.antennapod.core.util.URLChecker;
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import de.danoeh.antennapod.core.util.playback.RemoteMedia;
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@ -60,9 +60,11 @@ import de.danoeh.antennapod.core.util.syndication.HtmlToPlainText;
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import de.danoeh.antennapod.databinding.OnlinefeedviewActivityBinding;
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import de.danoeh.antennapod.dialog.AuthenticationDialog;
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import de.danoeh.antennapod.discovery.PodcastSearcherRegistry;
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import io.reactivex.Maybe;
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import io.reactivex.Observable;
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import io.reactivex.android.schedulers.AndroidSchedulers;
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import io.reactivex.disposables.Disposable;
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import io.reactivex.observers.DisposableMaybeObserver;
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import io.reactivex.schedulers.Schedulers;
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import org.apache.commons.lang3.StringUtils;
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import org.greenrobot.eventbus.EventBus;
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@ -321,34 +323,48 @@ public class OnlineFeedViewActivity extends AppCompatActivity {
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}
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Log.d(TAG, "Parsing feed");
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parser = Observable.fromCallable(this::doParseFeed)
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parser = Maybe.fromCallable(this::doParseFeed)
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.subscribeOn(Schedulers.computation())
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.observeOn(AndroidSchedulers.mainThread())
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.subscribe(optionalResult -> {
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if(optionalResult.isPresent()) {
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FeedHandlerResult result = optionalResult.get();
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.subscribeWith(new DisposableMaybeObserver<FeedHandlerResult>() {
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@Override
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public void onSuccess(@NonNull FeedHandlerResult result) {
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beforeShowFeedInformation(result.feed);
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showFeedInformation(result.feed, result.alternateFeedUrls);
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}
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}, error -> {
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String errorMsg = DownloadError.ERROR_PARSER_EXCEPTION.getErrorString(
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OnlineFeedViewActivity.this) + " (" + error.getMessage() + ")";
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showErrorDialog(errorMsg);
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Log.d(TAG, "Feed parser exception: " + Log.getStackTraceString(error));
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@Override
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public void onComplete() {
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// Ignore null result: We showed the discovery dialog.
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}
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@Override
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public void onError(@NonNull Throwable error) {
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String errorMsg = DownloadError.ERROR_PARSER_EXCEPTION.getErrorString(
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OnlineFeedViewActivity.this) + " (" + error.getMessage() + ")";
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showErrorDialog(errorMsg);
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Log.d(TAG, "Feed parser exception: " + Log.getStackTraceString(error));
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}
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});
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}
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@NonNull
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private Optional<FeedHandlerResult> doParseFeed() throws Exception {
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/**
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* Try to parse the feed.
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* @return The FeedHandlerResult if successful.
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* Null if unsuccessful but we started another attempt.
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* @throws Exception If unsuccessful but we do not know a resolution.
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*/
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@Nullable
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private FeedHandlerResult doParseFeed() throws Exception {
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FeedHandler handler = new FeedHandler();
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try {
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return Optional.of(handler.parseFeed(feed));
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return handler.parseFeed(feed);
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} catch (UnsupportedFeedtypeException e) {
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Log.d(TAG, "Unsupported feed type detected");
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if ("html".equalsIgnoreCase(e.getRootElement())) {
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boolean dialogShown = showFeedDiscoveryDialog(new File(feed.getFile_url()), feed.getDownload_url());
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if (dialogShown) {
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return Optional.empty();
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return null; // Should not display an error message
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} else {
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Log.d(TAG, "Supplied feed is an HTML web page that has no references to any feed");
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throw e;
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@ -56,7 +56,6 @@ import de.danoeh.antennapod.core.storage.DownloadRequestException;
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import de.danoeh.antennapod.core.storage.DownloadRequester;
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import de.danoeh.antennapod.core.util.FeedItemPermutors;
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import de.danoeh.antennapod.core.util.FeedItemUtil;
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import de.danoeh.antennapod.core.util.Optional;
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import de.danoeh.antennapod.ui.common.ThemeUtils;
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import de.danoeh.antennapod.core.util.gui.MoreContentListFooterUtil;
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import de.danoeh.antennapod.dialog.EpisodesApplyActionFragment;
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@ -549,15 +548,21 @@ public class FeedItemlistFragment extends Fragment implements AdapterView.OnItem
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disposable = Observable.fromCallable(this::loadData)
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.subscribeOn(Schedulers.io())
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.observeOn(AndroidSchedulers.mainThread())
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.subscribe(result -> {
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feed = result.orElse(null);
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refreshHeaderView();
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displayList();
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}, error -> Log.e(TAG, Log.getStackTraceString(error)));
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.subscribe(
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result -> {
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feed = result;
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refreshHeaderView();
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displayList();
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}, error -> {
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feed = null;
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refreshHeaderView();
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displayList();
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Log.e(TAG, Log.getStackTraceString(error));
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});
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}
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@NonNull
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private Optional<Feed> loadData() {
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@Nullable
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private Feed loadData() {
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Feed feed = DBReader.getFeed(feedID);
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if (feed != null && feed.getItemFilter() != null) {
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DBReader.loadAdditionalFeedItemListData(feed.getItems());
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@ -569,7 +574,7 @@ public class FeedItemlistFragment extends Fragment implements AdapterView.OnItem
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FeedItemPermutors.getPermutor(feed.getSortOrder()).reorder(feedItems);
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feed.setItems(feedItems);
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}
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return Optional.ofNullable(feed);
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return feed;
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}
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private static class FeedItemListAdapter extends EpisodeItemListAdapter {
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@ -1,213 +0,0 @@
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/*
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* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package de.danoeh.antennapod.core.util;
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import java.util.NoSuchElementException;
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import java.util.Objects;
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// AntennaPod's stripped-down version of Java/Android platform's java.util.Optional
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// so that it can be used on lower API level (API level 14)
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// Android-changed: removed ValueBased paragraph.
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/**
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* A container object which may or may not contain a non-null value.
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* If a value is present, {@code isPresent()} will return {@code true} and
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* {@code get()} will return the value.
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*
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* <p>Additional methods that depend on the presence or absence of a contained
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* value are provided, such as {@link #orElse(java.lang.Object) orElse()}
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* (return a default value if value not present) and
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* {@link #ifPresent(java.util.function.Consumer) ifPresent()} (execute a block
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* of code if the value is present).
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*
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* @since 1.8
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*/
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public final class Optional<T> {
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/**
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* Common instance for {@code empty()}.
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*/
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private static final Optional<?> EMPTY = new Optional<>();
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/**
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* If non-null, the value; if null, indicates no value is present
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*/
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private final T value;
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/**
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* Constructs an empty instance.
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*
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* @implNote Generally only one empty instance, {@link Optional#EMPTY},
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* should exist per VM.
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*/
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private Optional() {
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this.value = null;
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}
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/**
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* Returns an empty {@code Optional} instance. No value is present for this
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* Optional.
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*
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* @apiNote Though it may be tempting to do so, avoid testing if an object
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* is empty by comparing with {@code ==} against instances returned by
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* {@code Option.empty()}. There is no guarantee that it is a singleton.
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* Instead, use {@link #isPresent()}.
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*
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* @param <T> Type of the non-existent value
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* @return an empty {@code Optional}
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*/
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public static <T> Optional<T> empty() {
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@SuppressWarnings("unchecked")
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Optional<T> t = (Optional<T>) EMPTY;
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return t;
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}
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/**
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* Constructs an instance with the value present.
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*
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* @param value the non-null value to be present
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* @throws NullPointerException if value is null
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*/
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private Optional(T value) {
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this.value = Objects.requireNonNull(value);
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}
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/**
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* Returns an {@code Optional} with the specified present non-null value.
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*
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* @param <T> the class of the value
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* @param value the value to be present, which must be non-null
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* @return an {@code Optional} with the value present
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* @throws NullPointerException if value is null
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*/
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public static <T> Optional<T> of(T value) {
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return new Optional<>(value);
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}
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/**
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* Returns an {@code Optional} describing the specified value, if non-null,
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* otherwise returns an empty {@code Optional}.
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*
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* @param <T> the class of the value
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* @param value the possibly-null value to describe
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* @return an {@code Optional} with a present value if the specified value
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* is non-null, otherwise an empty {@code Optional}
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*/
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public static <T> Optional<T> ofNullable(T value) {
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return value == null ? empty() : of(value);
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}
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/**
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* If a value is present in this {@code Optional}, returns the value,
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* otherwise throws {@code NoSuchElementException}.
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*
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* @return the non-null value held by this {@code Optional}
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* @throws NoSuchElementException if there is no value present
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*
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* @see Optional#isPresent()
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*/
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public T get() {
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if (value == null) {
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throw new NoSuchElementException("No value present");
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}
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return value;
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}
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/**
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* Return {@code true} if there is a value present, otherwise {@code false}.
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*
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* @return {@code true} if there is a value present, otherwise {@code false}
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*/
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public boolean isPresent() {
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return value != null;
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}
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/**
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* Return the value if present, otherwise return {@code other}.
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*
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* @param other the value to be returned if there is no value present, may
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* be null
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* @return the value, if present, otherwise {@code other}
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*/
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public T orElse(T other) {
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return value != null ? value : other;
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}
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/**
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* Indicates whether some other object is "equal to" this Optional. The
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* other object is considered equal if:
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* <ul>
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* <li>it is also an {@code Optional} and;
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* <li>both instances have no value present or;
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* <li>the present values are "equal to" each other via {@code equals()}.
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* </ul>
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*
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* @param obj an object to be tested for equality
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* @return {code true} if the other object is "equal to" this object
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* otherwise {@code false}
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*/
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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}
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if (!(obj instanceof Optional)) {
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return false;
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}
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Optional<?> other = (Optional<?>) obj;
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return (value == other.value) || (value != null && value.equals(other.value));
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}
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/**
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* Returns the hash code value of the present value, if any, or 0 (zero) if
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* no value is present.
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*
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* @return hash code value of the present value or 0 if no value is present
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*/
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@Override
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public int hashCode() {
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return value != null ? value.hashCode() : 0;
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}
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/**
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* Returns a non-empty string representation of this Optional suitable for
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* debugging. The exact presentation format is unspecified and may vary
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* between implementations and versions.
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*
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* @implSpec If a value is present the result must include its string
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* representation in the result. Empty and present Optionals must be
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* unambiguously differentiable.
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*
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* @return the string representation of this instance
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*/
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@Override
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public String toString() {
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return value != null
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? String.format("Optional[%s]", value)
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: "Optional.empty";
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}
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}
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