use std::result;
use std::fmt;
use std::io::{Write, Read, Cursor};
use std::iter::{FromIterator, Extend};
use std::cmp::Ordering;
use std::ops::RangeFull;
use indexmap::IndexMap;
use chrono::{DateTime, Utc};
use byteorder::WriteBytesExt;
use crate::value::{Value, Array};
use crate::encode::{encode_document, encode_bson, write_i32, EncodeResult};
use crate::decode::{decode_document, DecodeResult};
use crate::spec::BinarySubtype;
use crate::object_id::ObjectId;
pub use indexmap::map::{IntoIter, Iter, IterMut, Entry, Keys, Values, ValuesMut, Drain};
#[derive(PartialEq, Debug)]
pub enum Error {
NotPresent,
UnexpectedType,
}
pub type Result<T> = result::Result<T, Error>;
#[derive(Clone, PartialEq, Eq, Default)]
pub struct Document {
inner: IndexMap<String, Value>
}
impl Document {
pub fn new() -> Document {
Document {
inner: IndexMap::new()
}
}
pub fn with_capacity(n: usize) -> Document {
Document {
inner: IndexMap::with_capacity(n)
}
}
pub fn capacity(&self) -> usize {
self.inner.capacity()
}
pub fn clear(&mut self) {
self.inner.clear();
}
pub fn get(&self, key: &str) -> Option<&Value> {
self.inner.get(key)
}
pub fn get_full(&self, key: &str) -> Option<(usize, &String, &Value)> {
self.inner.get_full(key)
}
pub fn get_mut(&mut self, key: &str) -> Option<&mut Value> {
self.inner.get_mut(key)
}
pub fn get_mut_full(&mut self, key: &str) -> Option<(usize, &String, &mut Value)> {
self.inner.get_full_mut(key)
}
pub fn contains_key(&self, key: &str) -> bool {
self.inner.contains_key(key)
}
pub fn len(&self) -> usize {
self.inner.len()
}
pub fn is_empty(&self) -> bool {
self.inner.is_empty()
}
pub fn entry(&mut self, key: String) -> Entry<String, Value> {
self.inner.entry(key)
}
pub fn insert_value(&mut self, key: String, value: Value) -> Option<Value> {
self.inner.insert(key, value)
}
pub fn insert_value_full(&mut self, key: String, value: Value) -> (usize, Option<Value>) {
self.inner.insert_full(key, value)
}
pub fn insert(&mut self, key: impl Into<String>, value: impl Into<Value>) -> Option<Value> {
self.insert_value(key.into(), value.into())
}
pub fn insert_full(&mut self, key: impl Into<String>, value: impl Into<Value>) -> (usize, Option<Value>) {
self.insert_value_full(key.into(), value.into())
}
pub fn remove(&mut self, key: &str) -> Option<Value> {
self.inner.remove(key)
}
pub fn swap_remove(&mut self, key: &str) -> Option<Value> {
self.inner.swap_remove(key)
}
pub fn swap_remove_full(&mut self, key: &str) -> Option<(usize, String, Value)> {
self.inner.swap_remove_full(key)
}
pub fn pop(&mut self) -> Option<(String, Value)> {
self.inner.pop()
}
pub fn retain<F>(&mut self, keep: F)
where F: FnMut(&String, &mut Value) -> bool
{
self.inner.retain(keep)
}
pub fn sort_keys(&mut self) {
self.inner.sort_keys()
}
pub fn sort_by<F>(&mut self, compare: F)
where F: FnMut(&String, &Value, &String, &Value) -> Ordering
{
self.inner.sort_by(compare)
}
pub fn sorted_by<F>(self, compare: F) -> IntoIter<String, Value>
where F: FnMut(&String, &Value, &String, &Value) -> Ordering
{
self.inner.sorted_by(compare)
}
pub fn drain(&mut self, range: RangeFull) -> Drain<String, Value> {
self.inner.drain(range)
}
pub fn iter(&self) -> Iter<'_, String, Value> {
self.into_iter()
}
pub fn iter_mut(&mut self) -> IterMut<'_, String, Value> {
self.into_iter()
}
pub fn keys(&self) -> Keys<String, Value> {
self.inner.keys()
}
pub fn value(&self) -> Values<String, Value> {
self.inner.values()
}
pub fn value_mut(&mut self) -> ValuesMut<String, Value> {
self.inner.values_mut()
}
pub fn get_f64(&self, key: &str) -> Result<f64> {
match self.get(key) {
Some(&Value::Double(v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn get_i32(&self, key: &str) -> Result<i32> {
match self.get(key) {
Some(&Value::Int32(v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn get_i64(&self, key: &str) -> Result<i64> {
match self.get(key) {
Some(&Value::Int64(v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn get_str(&self, key: &str) -> Result<&str> {
match self.get(key) {
Some(&Value::String(ref v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn get_array(&self, key: &str) -> Result<&Array> {
match self.get(key) {
Some(&Value::Array(ref v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn get_document(&self, key: &str) -> Result<&Document> {
match self.get(key) {
Some(&Value::Document(ref v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn get_bool(&self, key: &str) -> Result<bool> {
match self.get(key) {
Some(&Value::Boolean(v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn is_null(&self, key: &str) -> bool {
self.get(key) == Some(&Value::Null)
}
pub fn get_binary(&self, key: &str) -> Result<&Vec<u8>> {
match self.get(key) {
Some(&Value::Binary(BinarySubtype::Generic, ref v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn get_object_id(&self, key: &str) -> Result<&ObjectId> {
match self.get(key) {
Some(&Value::ObjectId(ref v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn get_time_stamp(&self, key: &str) -> Result<u64> {
match self.get(key) {
Some(&Value::TimeStamp(v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn get_utc_datetime(&self, key: &str) -> Result<&DateTime<Utc>> {
match self.get(key) {
Some(&Value::UTCDatetime(ref v)) => Ok(v),
Some(_) => Err(Error::UnexpectedType),
None => Err(Error::NotPresent),
}
}
pub fn encode(&self, writer: &mut impl Write) -> EncodeResult<()> {
encode_document(writer, self)
}
pub fn decode(reader: &mut impl Read) -> DecodeResult<Document> {
decode_document(reader)
}
pub fn to_vec(&self) -> EncodeResult<Vec<u8>> {
let mut buf = Vec::with_capacity(64);
write_i32(&mut buf, 0)?;
for (key, val) in self {
encode_bson(&mut buf, key.as_ref(), val)?;
}
buf.write_u8(0)?;
let len_bytes = (buf.len() as i32).to_le_bytes();
buf[..4].clone_from_slice(&len_bytes);
Ok(buf)
}
pub fn from_slice(slice: &[u8]) -> DecodeResult<Document> {
let mut reader = Cursor::new(slice);
decode_document(&mut reader)
}
pub fn extend(&mut self, iter: impl Into<Document>) {
self.inner.extend(iter.into());
}
pub fn get_index(&self, index: usize) -> Option<(&String, &Value)> {
self.inner.get_index(index)
}
pub fn get_index_mut(&mut self, index: usize) -> Option<(&mut String, &mut Value)> {
self.inner.get_index_mut(index)
}
pub fn swap_remove_index(&mut self, index: usize) -> Option<(String, Value)> {
self.inner.swap_remove_index(index)
}
}
impl fmt::Debug for Document {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
write!(fmt, "Document({:?})", self.inner)
}
}
impl fmt::Display for Document {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
write!(fmt, "{{")?;
let mut first = true;
for (k, v) in self.iter() {
if first {
first = false;
write!(fmt, " ")?;
} else {
write!(fmt, ", ")?;
}
write!(fmt, "{}: {}", k, v)?;
}
write!(fmt, "{}}}", if !first { " " } else { "" })?;
Ok(())
}
}
impl IntoIterator for Document {
type Item = (String, Value);
type IntoIter = IntoIter<String, Value>;
fn into_iter(self) -> Self::IntoIter {
self.inner.into_iter()
}
}
impl<'a> IntoIterator for &'a Document {
type Item = (&'a String, &'a Value);
type IntoIter = Iter<'a, String, Value>;
fn into_iter(self) -> Self::IntoIter {
self.inner.iter()
}
}
impl<'a> IntoIterator for &'a mut Document {
type Item = (&'a String, &'a mut Value);
type IntoIter = IterMut<'a, String, Value>;
fn into_iter(self) -> Self::IntoIter {
self.inner.iter_mut()
}
}
impl FromIterator<(String, Value)> for Document {
fn from_iter<I: IntoIterator<Item=(String, Value)>>(iter: I) -> Self {
let mut document = Document::with_capacity(8);
for (k, v) in iter {
document.insert(k, v);
}
document
}
}
impl From<IndexMap<String, Value>> for Document {
fn from(map: IndexMap<String, Value>) -> Document {
Document { inner: map }
}
}
#[cfg(test)]
mod test {
use crate::Document;
use crate::doc;
#[test]
fn to_vec() {
let document = doc!{"aa": "bb"};
let vec = document.to_vec().unwrap();
let document2 = Document::from_slice(&vec).unwrap();
assert_eq!(document, document2);
}
}