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use crate::error::*;
pub enum ObjectType {
Atom,
Map,
Array,
}
pub trait Object {
fn get_type(&self) -> ObjectType;
fn has_key(&self, key: &str) -> bool;
fn has_index(&self, idx: usize) -> bool;
fn at_index<'a>(&'a self, idx: usize) -> Result<Option<&'a Self>>;
fn at_index_mut<'a>(&'a mut self, idx: usize) -> Result<Option<&'a mut Self>>;
fn at_key<'a>(&'a self, key: &str) -> Result<Option<&'a Self>>;
fn at_key_mut<'a>(&'a mut self, key: &str) -> Result<Option<&'a mut Self>>;
}
#[cfg(feature = "backend_toml")]
impl Object for toml::Value {
fn get_type(&self) -> ObjectType {
match self {
toml::Value::Boolean(_)
| toml::Value::Datetime(_)
| toml::Value::Float(_)
| toml::Value::Integer(_)
| toml::Value::String(_) => ObjectType::Atom,
toml::Value::Array(_) => ObjectType::Array,
toml::Value::Table(_) => ObjectType::Map,
}
}
fn has_key(&self, key: &str) -> bool {
match self {
toml::Value::Table(t) => t.contains_key(key),
_ => false
}
}
fn has_index(&self, idx: usize) -> bool {
match self {
toml::Value::Array(a) => a.len() > idx,
_ => false
}
}
fn at_index<'a>(&'a self, idx: usize) -> Result<Option<&'a Self>> {
match self {
toml::Value::Array(a) => Ok(a.get(idx)),
toml::Value::Table(_) => Err(crate::error::Error::NoIndexInTable(idx)),
_ => Err(crate::error::Error::QueryingValueAsArray(idx)),
}
}
fn at_index_mut<'a>(&'a mut self, idx: usize) -> Result<Option<&'a mut Self>> {
match self {
toml::Value::Array(a) => Ok(a.get_mut(idx)),
toml::Value::Table(_) => Err(crate::error::Error::NoIndexInTable(idx)),
_ => Err(crate::error::Error::QueryingValueAsArray(idx)),
}
}
fn at_key<'a>(&'a self, key: &str) -> Result<Option<&'a Self>> {
match self {
toml::Value::Table(t) => Ok(t.get(key)),
toml::Value::Array(_) => Err(crate::error::Error::NoIdentifierInArray(key.to_string())),
_ => Err(crate::error::Error::QueryingValueAsTable(key.to_string())),
}
}
fn at_key_mut<'a>(&'a mut self, key: &str) -> Result<Option<&'a mut Self>> {
match self {
toml::Value::Table(t) => Ok(t.get_mut(key)),
toml::Value::Array(_) => Err(crate::error::Error::NoIdentifierInArray(key.to_string())),
_ => Err(crate::error::Error::QueryingValueAsTable(key.to_string())),
}
}
}
#[cfg(feature = "backend_serde_json")]
impl Object for serde_json::Value {
fn get_type(&self) -> ObjectType {
match self {
serde_json::Value::Null
| serde_json::Value::Bool(_)
| serde_json::Value::Number(_)
| serde_json::Value::String(_) => ObjectType::Atom,
serde_json::Value::Array(_) => ObjectType::Array,
serde_json::Value::Object(_) => ObjectType::Map,
}
}
fn has_key(&self, key: &str) -> bool {
match self {
serde_json::Value::Object(t) => t.contains_key(key),
_ => false
}
}
fn has_index(&self, idx: usize) -> bool {
match self {
serde_json::Value::Array(a) => a.len() > idx,
_ => false
}
}
fn at_index<'a>(&'a self, idx: usize) -> Result<Option<&'a Self>> {
match self {
serde_json::Value::Array(a) => Ok(a.get(idx)),
serde_json::Value::Object(_) => Err(crate::error::Error::NoIndexInTable(idx)),
_ => Err(crate::error::Error::QueryingValueAsArray(idx)),
}
}
fn at_index_mut<'a>(&'a mut self, idx: usize) -> Result<Option<&'a mut Self>> {
match self {
serde_json::Value::Array(a) => Ok(a.get_mut(idx)),
serde_json::Value::Object(_) => Err(crate::error::Error::NoIndexInTable(idx)),
_ => Err(crate::error::Error::QueryingValueAsArray(idx)),
}
}
fn at_key<'a>(&'a self, key: &str) -> Result<Option<&'a Self>> {
match self {
serde_json::Value::Object(t) => Ok(t.get(key)),
serde_json::Value::Array(_) => Err(crate::error::Error::NoIdentifierInArray(key.to_string())),
_ => Err(crate::error::Error::QueryingValueAsTable(key.to_string())),
}
}
fn at_key_mut<'a>(&'a mut self, key: &str) -> Result<Option<&'a mut Self>> {
match self {
serde_json::Value::Object(t) => Ok(t.get_mut(key)),
serde_json::Value::Array(_) => Err(crate::error::Error::NoIdentifierInArray(key.to_string())),
_ => Err(crate::error::Error::QueryingValueAsTable(key.to_string())),
}
}
}
|
