98 lines
2.9 KiB
Rust
98 lines
2.9 KiB
Rust
// Copyright 2018 Mozilla
|
|
//
|
|
// 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.
|
|
|
|
use std; // To refer to std::result::Result.
|
|
|
|
use rusqlite;
|
|
|
|
use core_traits::{
|
|
ValueTypeSet,
|
|
};
|
|
use db_traits::errors::DbError;
|
|
use edn::query::{
|
|
PlainSymbol,
|
|
};
|
|
use query_pull_traits::errors::{
|
|
PullError,
|
|
};
|
|
|
|
use aggregates::{
|
|
SimpleAggregationOp,
|
|
};
|
|
|
|
#[macro_export]
|
|
macro_rules! bail {
|
|
($e:expr) => (
|
|
return Err($e.into());
|
|
)
|
|
}
|
|
|
|
pub type Result<T> = std::result::Result<T, ProjectorError>;
|
|
|
|
#[derive(Debug, Fail)]
|
|
pub enum ProjectorError {
|
|
/// We're just not done yet. Message that the feature is recognized but not yet
|
|
/// implemented.
|
|
#[fail(display = "not yet implemented: {}", _0)]
|
|
NotYetImplemented(String),
|
|
|
|
#[fail(display = "no possible types for value provided to {:?}", _0)]
|
|
CannotProjectImpossibleBinding(SimpleAggregationOp),
|
|
|
|
#[fail(display = "cannot apply projection operation {:?} to types {:?}", _0, _1)]
|
|
CannotApplyAggregateOperationToTypes(SimpleAggregationOp, ValueTypeSet),
|
|
|
|
#[fail(display = "invalid projection: {}", _0)]
|
|
InvalidProjection(String),
|
|
|
|
#[fail(display = "cannot project unbound variable {:?}", _0)]
|
|
UnboundVariable(PlainSymbol),
|
|
|
|
#[fail(display = "cannot find type for variable {:?}", _0)]
|
|
NoTypeAvailableForVariable(PlainSymbol),
|
|
|
|
#[fail(display = "expected {}, got {}", _0, _1)]
|
|
UnexpectedResultsType(&'static str, &'static str),
|
|
|
|
#[fail(display = "expected tuple of length {}, got tuple of length {}", _0, _1)]
|
|
UnexpectedResultsTupleLength(usize, usize),
|
|
|
|
#[fail(display = "min/max expressions: {} (max 1), corresponding: {}", _0, _1)]
|
|
AmbiguousAggregates(usize, usize),
|
|
|
|
// It would be better to capture the underlying `rusqlite::Error`, but that type doesn't
|
|
// implement many useful traits, including `Clone`, `Eq`, and `PartialEq`.
|
|
#[fail(display = "SQL error: {}", _0)]
|
|
RusqliteError(String),
|
|
|
|
#[fail(display = "{}", _0)]
|
|
DbError(#[cause] DbError),
|
|
|
|
#[fail(display = "{}", _0)]
|
|
PullError(#[cause] PullError),
|
|
}
|
|
|
|
impl From<rusqlite::Error> for ProjectorError {
|
|
fn from(error: rusqlite::Error) -> ProjectorError {
|
|
ProjectorError::RusqliteError(error.to_string())
|
|
}
|
|
}
|
|
|
|
impl From<DbError> for ProjectorError {
|
|
fn from(error: DbError) -> ProjectorError {
|
|
ProjectorError::DbError(error)
|
|
}
|
|
}
|
|
|
|
impl From<PullError> for ProjectorError {
|
|
fn from(error: PullError) -> ProjectorError {
|
|
ProjectorError::PullError(error)
|
|
}
|
|
}
|