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      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 
     17 package android.service.autofill;
     18 
     19 import static android.view.autofill.Helper.sDebug;
     20 
     21 import android.annotation.NonNull;
     22 import android.os.Parcel;
     23 import android.os.Parcelable;
     24 
     25 import com.android.internal.util.Preconditions;
     26 
     27 /**
     28  * Validator used to implement a {@code NOT} logical operation.
     29  *
     30  * @hide
     31  */
     32 final 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