| /* |
| * Copyright (C) 2021 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.android.queryable.queries; |
| |
| import com.android.queryable.Queryable; |
| |
| public final class BooleanQueryHelper<E extends Queryable> implements BooleanQuery<E> { |
| |
| private final E mQuery; |
| private Boolean mTargetValue = null; |
| |
| BooleanQueryHelper() { |
| mQuery = (E) this; |
| } |
| |
| public BooleanQueryHelper(E query) { |
| mQuery = query; |
| } |
| |
| @Override |
| public E isTrue() { |
| if (mTargetValue != null) { |
| throw new IllegalStateException("Cannot set multiple boolean filters"); |
| } |
| |
| mTargetValue = true; |
| |
| return mQuery; |
| } |
| |
| @Override |
| public E isFalse() { |
| if (mTargetValue != null) { |
| throw new IllegalStateException("Cannot set multiple boolean filters"); |
| } |
| |
| mTargetValue = false; |
| |
| return mQuery; |
| } |
| |
| @Override |
| public E equals(boolean value) { |
| if (mTargetValue != null) { |
| throw new IllegalStateException("Cannot set multiple boolean filters"); |
| } |
| |
| mTargetValue = value; |
| |
| return mQuery; |
| } |
| |
| @Override |
| public boolean matches(Boolean value) { |
| return (mTargetValue == null) || mTargetValue == value; |
| } |
| |
| public static boolean matches(BooleanQuery<?> query, Boolean value) { |
| return query.matches(value); |
| } |
| } |