| /* |
| * Copyright (C) 2017 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 android.service.autofill; |
| |
| import static android.view.autofill.Helper.sDebug; |
| |
| import android.annotation.NonNull; |
| import android.annotation.TestApi; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.util.Log; |
| import android.view.autofill.AutofillId; |
| |
| import com.android.internal.util.Preconditions; |
| |
| import java.util.regex.Pattern; |
| |
| /** |
| * Defines if a field is valid based on a regular expression (regex). |
| * |
| * <p>See {@link SaveInfo.Builder#setValidator(Validator)} for examples. |
| */ |
| public final class SimpleRegexValidator extends InternalValidator implements Validator, Parcelable { |
| |
| private static final String TAG = "SimpleRegexValidator"; |
| |
| private final AutofillId mId; |
| private final Pattern mRegex; |
| |
| /** |
| * Default constructor. |
| * |
| * @param id id of the field whose regex is applied to. |
| * @param regex regular expression that defines the result of the validator: if the regex |
| * matches the contents of the field identified by {@code id}, it returns {@code true}; |
| * otherwise, it returns {@code false}. |
| */ |
| public SimpleRegexValidator(@NonNull AutofillId id, @NonNull Pattern regex) { |
| mId = Preconditions.checkNotNull(id); |
| mRegex = Preconditions.checkNotNull(regex); |
| } |
| |
| /** @hide */ |
| @Override |
| @TestApi |
| public boolean isValid(@NonNull ValueFinder finder) { |
| final String value = finder.findByAutofillId(mId); |
| if (value == null) { |
| Log.w(TAG, "No view for id " + mId); |
| return false; |
| } |
| |
| final boolean valid = mRegex.matcher(value).matches(); |
| if (sDebug) Log.d(TAG, "isValid(): " + valid); |
| return valid; |
| } |
| |
| ///////////////////////////////////// |
| // Object "contract" methods. // |
| ///////////////////////////////////// |
| @Override |
| public String toString() { |
| if (!sDebug) return super.toString(); |
| |
| return "SimpleRegexValidator: [id=" + mId + ", regex=" + mRegex + "]"; |
| } |
| |
| ///////////////////////////////////// |
| // Parcelable "contract" methods. // |
| ///////////////////////////////////// |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel parcel, int flags) { |
| parcel.writeParcelable(mId, flags); |
| parcel.writeSerializable(mRegex); |
| } |
| |
| public static final Parcelable.Creator<SimpleRegexValidator> CREATOR = |
| new Parcelable.Creator<SimpleRegexValidator>() { |
| @Override |
| public SimpleRegexValidator createFromParcel(Parcel parcel) { |
| return new SimpleRegexValidator(parcel.readParcelable(null), |
| (Pattern) parcel.readSerializable()); |
| } |
| |
| @Override |
| public SimpleRegexValidator[] newArray(int size) { |
| return new SimpleRegexValidator[size]; |
| } |
| }; |
| } |