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This is the official Firebase Admin Java SDK. Build extraordinary native JVM apps in
minutes with Firebase. The Firebase platform can power your app’s backend, user
authentication, static hosting, and more.
/*
* Copyright 2017 Google Inc.
*
* 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.google.firebase.database;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;
/**
* Instances of DatabaseError are passed to callbacks when an operation failed. They contain a
* description of the specific error that occurred.
*/
public class DatabaseError {
/** Internal use. */
public static final int DATA_STALE = -1;
/** The server indicated that this operation failed. */
public static final int OPERATION_FAILED = -2;
/** This client does not have permission to perform this operation. */
public static final int PERMISSION_DENIED = -3;
/** The operation had to be aborted due to a network disconnect. */
public static final int DISCONNECTED = -4;
// Preempted was removed, this is for here for completeness and history
// public static final int PREEMPTED = -5;
/** The supplied auth token has expired. */
public static final int EXPIRED_TOKEN = -6;
/**
* The specified authentication token is invalid. This can occur when the token is malformed,
* expired, or the secret that was used to generate it has been revoked.
*/
public static final int INVALID_TOKEN = -7;
/** The transaction had too many retries */
public static final int MAX_RETRIES = -8;
/** The transaction was overridden by a subsequent set */
public static final int OVERRIDDEN_BY_SET = -9;
/** The service is unavailable. */
public static final int UNAVAILABLE = -10;
/** An exception occurred in user code. */
public static final int USER_CODE_EXCEPTION = -11;
// client codes
/** The operation could not be performed due to a network error. */
public static final int NETWORK_ERROR = -24;
/** The write was canceled locally. */
public static final int WRITE_CANCELED = -25;
/**
* An unknown error occurred. Please refer to the error message and error details for more
* information.
*/
public static final int UNKNOWN_ERROR = -999;
private static final Map errorReasons = new HashMap<>();
private static final Map errorCodes = new HashMap<>();
static {
// Firebase Database error codes
errorReasons.put(DATA_STALE, "The transaction needs to be run again with current data");
errorReasons.put(OPERATION_FAILED, "The server indicated that this operation failed");
errorReasons.put(
PERMISSION_DENIED, "This client does not have permission to perform this operation");
errorReasons.put(DISCONNECTED, "The operation had to be aborted due to a network disconnect");
errorReasons.put(EXPIRED_TOKEN, "The supplied auth token has expired");
errorReasons.put(INVALID_TOKEN, "The supplied auth token was invalid");
errorReasons.put(MAX_RETRIES, "The transaction had too many retries");
errorReasons.put(OVERRIDDEN_BY_SET, "The transaction was overridden by a subsequent set");
errorReasons.put(UNAVAILABLE, "The service is unavailable");
errorReasons.put(
USER_CODE_EXCEPTION,
"User code called from the Firebase Database runloop threw an exception:\n");
// client codes
errorReasons.put(NETWORK_ERROR, "The operation could not be performed due to a network error");
errorReasons.put(WRITE_CANCELED, "The write was canceled by the user.");
errorReasons.put(UNKNOWN_ERROR, "An unknown error occurred");
}
static {
// Firebase Database error codes
errorCodes.put("datastale", DATA_STALE);
errorCodes.put("failure", OPERATION_FAILED);
errorCodes.put("permission_denied", PERMISSION_DENIED);
errorCodes.put("disconnected", DISCONNECTED);
errorCodes.put("expired_token", EXPIRED_TOKEN);
errorCodes.put("invalid_token", INVALID_TOKEN);
errorCodes.put("maxretries", MAX_RETRIES);
errorCodes.put("overriddenbyset", OVERRIDDEN_BY_SET);
errorCodes.put("unavailable", UNAVAILABLE);
// client codes
errorCodes.put("network_error", NETWORK_ERROR);
errorCodes.put("write_canceled", WRITE_CANCELED);
}
private final int code;
private final String message;
private final String details;
private DatabaseError(int code, String message) {
this(code, message, null);
}
private DatabaseError(int code, String message, String details) {
this.code = code;
this.message = message;
this.details = (details == null) ? "" : details;
}
/**
* For internal use.
*
* @hide
* @param status The status string
* @return An error corresponding the to the status
*/
public static DatabaseError fromStatus(String status) {
return fromStatus(status, null);
}
/**
* For internal use.
*
* @hide
* @param status The status string
* @param reason The reason for the error
* @return An error corresponding the to the status
*/
public static DatabaseError fromStatus(String status, String reason) {
return fromStatus(status, reason, null);
}
/**
* For internal use
*
* @hide
* @param status The status string
* @param reason The reason for the error
* @param details Additional details or null
* @return An error corresponding the to the status
*/
public static DatabaseError fromStatus(String status, String reason, String details) {
Integer code = errorCodes.get(status.toLowerCase());
if (code == null) {
code = UNKNOWN_ERROR;
}
String message = reason == null ? errorReasons.get(code) : reason;
return new DatabaseError(code, message, details);
}
/**
* For internal use.
*
* @hide
* @param code The error code
* @return An error corresponding the to the code
*/
public static DatabaseError fromCode(int code) {
if (!errorReasons.containsKey(code)) {
throw new IllegalArgumentException("Invalid Firebase Database error code: " + code);
}
String message = errorReasons.get(code);
return new DatabaseError(code, message, null);
}
public static DatabaseError fromException(Throwable e) {
StringWriter stringWriter = new StringWriter();
PrintWriter printWriter = new PrintWriter(stringWriter);
e.printStackTrace(printWriter);
String reason = errorReasons.get(USER_CODE_EXCEPTION) + stringWriter.toString();
return new DatabaseError(USER_CODE_EXCEPTION, reason);
}
/**
* @return One of the defined status codes, depending on the error.
*/
public int getCode() {
return code;
}
/**
* @return A human-readable description of the error.
*/
public String getMessage() {
return message;
}
/**
* @return Human-readable details on the error and additional information, e.g. links to docs;
*/
public String getDetails() {
return details;
}
@Override
public String toString() {
return "DatabaseError: " + message;
}
/**
* Can be used if a third party needs an Exception from Firebase Database for integration
* purposes.
*
* @return An exception wrapping this error, with an appropriate message and no stack trace.
*/
public DatabaseException toException() {
return new DatabaseException("Firebase Database error: " + message);
}
}