NegationValidator.java revision 1cdf5fb4e24fc4600163fc98ca5fec230c520f59 
1/*
2 * Copyright (C) 2017 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.service.autofill;
18
19import static android.view.autofill.Helper.sDebug;
20
21import android.annotation.NonNull;
22import android.os.Parcel;
23import android.os.Parcelable;
24
25import com.android.internal.util.Preconditions;
26
27/**
28 * Validator used to implement a {@code NOT} logical operation.
29 *
30 * @hide
31 */
32final class NegationValidator extends InternalValidator {
33    @NonNull private final InternalValidator mValidator;
34
35    NegationValidator(@NonNull InternalValidator validator) {
36        mValidator = Preconditions.checkNotNull(validator);
37    }
38
39    @Override
40    public boolean isValid(@NonNull ValueFinder finder) {
41        return !mValidator.isValid(finder);
42    }
43
44    /////////////////////////////////////
45    // Object "contract" methods. //
46    /////////////////////////////////////
47    @Override
48    public String toString() {
49        if (!sDebug) return super.toString();
50
51        return "NegationValidator: [validator=" + mValidator + "]";
52    }
53
54    /////////////////////////////////////
55    // Parcelable "contract" methods. //
56    /////////////////////////////////////
57    @Override
58    public int describeContents() {
59        return 0;
60    }
61
62    @Override
63    public void writeToParcel(Parcel dest, int flags) {
64        dest.writeParcelable(mValidator, flags);
65    }
66
67    public static final Parcelable.Creator<NegationValidator> CREATOR =
68            new Parcelable.Creator<NegationValidator>() {
69        @Override
70        public NegationValidator createFromParcel(Parcel parcel) {
71            return new NegationValidator(parcel.readParcelable(null));
72        }
73
74        @Override
75        public NegationValidator[] newArray(int size) {
76            return new NegationValidator[size];
77        }
78    };
79}
80