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/*
* Copyright (C) 2020 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.receivecontent;
import android.content.ClipData;
import android.content.ClipDescription;
import android.net.Uri;
import android.util.Pair;
import android.view.ContentInfo;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Predicate;
final class Utils {
private Utils() {}
/**
* If you use Jetpack, use {@code androidx.core.view.ContentInfoCompat.partition()}.
*/
public static Pair<ContentInfo, ContentInfo> partition(ContentInfo payload,
Predicate<ClipData.Item> itemPredicate) {
ClipData clip = payload.getClip();
if (clip.getItemCount() == 1) {
boolean matched = itemPredicate.test(clip.getItemAt(0));
return Pair.create(matched ? payload : null, matched ? null : payload);
}
ArrayList<ClipData.Item> acceptedItems = new ArrayList<>();
ArrayList<ClipData.Item> remainingItems = new ArrayList<>();
for (int i = 0; i < clip.getItemCount(); i++) {
ClipData.Item item = clip.getItemAt(i);
if (itemPredicate.test(item)) {
acceptedItems.add(item);
} else {
remainingItems.add(item);
}
}
if (acceptedItems.isEmpty()) {
return Pair.create(null, payload);
}
if (remainingItems.isEmpty()) {
return Pair.create(payload, null);
}
ContentInfo accepted = new ContentInfo.Builder(payload)
.setClip(buildClipData(new ClipDescription(clip.getDescription()), acceptedItems))
.build();
ContentInfo remaining = new ContentInfo.Builder(payload)
.setClip(buildClipData(new ClipDescription(clip.getDescription()), remainingItems))
.build();
return Pair.create(accepted, remaining);
}
private static ClipData buildClipData(ClipDescription description,
List<ClipData.Item> items) {
ClipData clip = new ClipData(new ClipDescription(description), items.get(0));
for (int i = 1; i < items.size(); i++) {
clip.addItem(items.get(i));
}
return clip;
}
public static List<Uri> collectUris(ClipData clip) {
List<Uri> uris = new ArrayList<>(clip.getItemCount());
for (int i = 0; i < clip.getItemCount(); i++) {
Uri uri = clip.getItemAt(i).getUri();
if (uri != null) {
uris.add(uri);
}
}
return uris;
}
}
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