1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.view.autofill;
18
19import android.annotation.NonNull;
20import android.annotation.Nullable;
21
22import java.util.Collection;
23
24/** @hide */
25public final class Helper {
26
27    // Debug-level flags are defined when service is bound.
28    public static boolean sDebug = false;
29    public static boolean sVerbose = false;
30
31    /**
32     * Appends {@code value} to the {@code builder} redacting its contents.
33     */
34    public static void appendRedacted(@NonNull StringBuilder builder,
35            @Nullable CharSequence value) {
36        builder.append(getRedacted(value));
37    }
38
39    /**
40     * Gets the redacted version of a value.
41     */
42    @NonNull
43    public static String getRedacted(@Nullable CharSequence value) {
44        return (value == null) ? "null" : value.length() + "_chars";
45    }
46
47    /**
48     * Appends {@code values} to the {@code builder} redacting its contents.
49     */
50    public static void appendRedacted(@NonNull StringBuilder builder, @Nullable String[] values) {
51        if (values == null) {
52            builder.append("N/A");
53            return;
54        }
55        builder.append("[");
56        for (String value : values) {
57            builder.append(" '");
58            appendRedacted(builder, value);
59            builder.append("'");
60        }
61        builder.append(" ]");
62    }
63
64    /**
65     * Convers a collaction of {@link AutofillId AutofillIds} to an array.
66     * @param collection The collection.
67     * @return The array.
68     */
69    public static @NonNull AutofillId[] toArray(Collection<AutofillId> collection) {
70        if (collection == null) {
71            return new AutofillId[0];
72        }
73        final AutofillId[] array = new AutofillId[collection.size()];
74        collection.toArray(array);
75        return array;
76    }
77
78    private Helper() {
79        throw new UnsupportedOperationException("contains static members only");
80    }
81}
82