service/java/com/android/server/wifi/PropertyService.java


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/*
 * Copyright (C) 2016 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.server.wifi;

import android.annotation.NonNull;

import com.android.internal.annotations.VisibleForTesting;

/** Abstraction of android.os.SystemProperties, to enable mocking out its static methods. */
@VisibleForTesting
public interface PropertyService {
    /**
     * Get the current value of |key|.
     * @return value of |key|, if key exists; |defaultValue| or empty string otherwise
     */
    @NonNull
    String get(String key, String defaultValue);

    /**
     * Set the value for |key|.
     * @throws IllegalArgumentException if the key exceeds 32 characters
     * @throws IllegalArgumentException if the value exceeds 92 characters
     */
    void set(String key, String val);

    /**
     * Get the current value of |key|.
     * @return value of |key|, if key exists; |defaultValue| otherwise
     */
    boolean getBoolean(String key, boolean defaultValue);

}