c3p0_common 0.41.0

A good friend for r2d2
Documentation 
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use err_derive::Error;

#[derive(Error, Debug)]
pub enum C3p0Error {
    #[error(display = "InternalError: [{}]", cause)]
    InternalError { cause: String },
    #[error(
        display = "DbError. DB: {}. DB specific error code: [{:?}]. Msg: {}",
        db,
        code,
        cause
    )]
    DbError {
        db: &'static str,
        cause: String,
        code: Option<String>,
    },
    #[error(display = "RowMapperError: [{}]", cause)]
    RowMapperError { cause: String },
    #[error(display = "OptimisticLockError: [{}]", message)]
    OptimisticLockError { message: String },
    #[error(display = "JsonProcessingError: [{}]", cause)]
    JsonProcessingError { cause: serde_json::error::Error },
    #[error(display = "IteratorError: [{}]", message)]
    IteratorError { message: String },
    #[error(display = "PoolError: [{}]", cause)]
    PoolError { cause: String },
    #[error(display = "ResultNotFoundError: Expected one result but found zero.")]
    ResultNotFoundError,
    #[error(display = "TransactionError: [{}]", cause)]
    TransactionError { cause: Box<dyn std::error::Error> },
    #[error(display = "CorruptedDbMigrationState: [{}]", message)]
    CorruptedDbMigrationState { message: String },
    #[error(display = "AlteredMigrationSql: [{}]", message)]
    AlteredMigrationSql { message: String },
    #[error(display = "WrongMigrationSet: [{}]", message)]
    WrongMigrationSet { message: String },
    #[error(display = "FileSystemError: [{}]", message)]
    FileSystemError { message: String },
    #[error(display = "MigrationError: [{}]. Cause: [{}]", message, cause)]
    MigrationError {
        message: String,
        cause: Box<dyn std::error::Error>,
    },
}

impl From<serde_json::error::Error> for C3p0Error {
    fn from(cause: serde_json::error::Error) -> Self {
        C3p0Error::JsonProcessingError { cause }
    }
}