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/*
* Copyright © 2017-2023 WireGuard LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package com.wireguard.android.backend;
import com.wireguard.util.NonNullForAll;
/**
* A subclass of {@link Exception} that encapsulates the reasons for a failure originating in
* implementations of {@link Backend}.
*/
@NonNullForAll
public final class BackendException extends Exception {
private final Object[] format;
private final Reason reason;
/**
* Public constructor for BackendException.
*
* @param reason The {@link Reason} which caused this exception to be thrown
* @param format Format string values used when converting exceptions to user-facing strings.
*/
public BackendException(final Reason reason, final Object... format) {
this.reason = reason;
this.format = format;
}
/**
* Get the format string values associated with the instance.
*
* @return Array of {@link Object} for string formatting purposes
*/
public Object[] getFormat() {
return format;
}
/**
* Get the reason for this exception.
*
* @return Associated {@link Reason} for this exception.
*/
public Reason getReason() {
return reason;
}
/**
* Enum class containing all known reasons for why a {@link BackendException} might be thrown.
*/
public enum Reason {
UNKNOWN_KERNEL_MODULE_NAME,
WG_QUICK_CONFIG_ERROR_CODE,
TUNNEL_MISSING_CONFIG,
VPN_NOT_AUTHORIZED,
UNABLE_TO_START_VPN,
TUN_CREATION_ERROR,
GO_ACTIVATION_ERROR_CODE,
DNS_RESOLUTION_FAILURE,
}
}
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