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use std::hash::Hash;
use anyhow::Error;
use pyo3::{
pyclass, pymethods,
types::{PyIterator, PyModule},
IntoPy, PyAny, PyObject, PyResult, Python, ToPyObject,
};
use super::TreeCache;
pub fn register_module(py: Python<'_>, m: &PyModule) -> PyResult<()> {
let child_module = PyModule::new(py, "tree_cache")?;
child_module.add_class::<PythonTreeCache>()?;
child_module.add_class::<StringTreeCache>()?;
m.add_submodule(child_module)?;
// We need to manually add the module to sys.modules to make `from
// synapse.synapse_rust import push` work.
py.import("sys")?
.getattr("modules")?
.set_item("synapse.synapse_rust.tree_cache", child_module)?;
Ok(())
}
struct HashablePyObject {
obj: PyObject,
hash: isize,
}
impl HashablePyObject {
pub fn new(obj: &PyAny) -> Result<Self, Error> {
let hash = obj.hash()?;
Ok(HashablePyObject {
obj: obj.to_object(obj.py()),
hash,
})
}
}
impl IntoPy<PyObject> for &HashablePyObject {
fn into_py(self, _: Python<'_>) -> PyObject {
self.obj.clone()
}
}
impl Hash for HashablePyObject {
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
self.hash.hash(state);
}
}
impl PartialEq for HashablePyObject {
fn eq(&self, other: &Self) -> bool {
let equal = Python::with_gil(|py| {
let result = self.obj.as_ref(py).eq(other.obj.as_ref(py));
result.unwrap_or(false)
});
equal
}
}
impl Eq for HashablePyObject {}
#[pyclass]
struct PythonTreeCache(TreeCache<HashablePyObject, PyObject>);
#[pymethods]
impl PythonTreeCache {
#[new]
fn new() -> Self {
PythonTreeCache(Default::default())
}
pub fn set(&mut self, key: &PyAny, value: PyObject) -> Result<(), Error> {
let v: Vec<HashablePyObject> = key
.iter()?
.map(|obj| HashablePyObject::new(obj?))
.collect::<Result<_, _>>()?;
self.0.set(v, value)?;
Ok(())
}
// pub fn get_node(&self, key: &PyAny) -> Result<Option<&TreeCacheNode<K, PyObject>>, Error> {
// todo!()
// }
pub fn get(&self, key: &PyAny) -> Result<Option<&PyObject>, Error> {
let v: Vec<HashablePyObject> = key
.iter()?
.map(|obj| HashablePyObject::new(obj?))
.collect::<Result<_, _>>()?;
Ok(self.0.get(&v)?)
}
// pub fn pop_node(&mut self, key: &PyAny) -> Result<Option<TreeCacheNode<K, PyObject>>, Error> {
// todo!()
// }
pub fn pop(&mut self, key: &PyAny) -> Result<Option<PyObject>, Error> {
let v: Vec<HashablePyObject> = key
.iter()?
.map(|obj| HashablePyObject::new(obj?))
.collect::<Result<_, _>>()?;
Ok(self.0.pop(&v)?)
}
pub fn clear(&mut self) {
self.0.clear()
}
pub fn len(&self) -> usize {
self.0.len()
}
pub fn values(&self) -> Vec<&PyObject> {
self.0.values().collect()
}
pub fn items(&self) -> Vec<(Vec<&HashablePyObject>, &PyObject)> {
todo!()
}
}
#[pyclass]
struct StringTreeCache(TreeCache<String, String>);
#[pymethods]
impl StringTreeCache {
#[new]
fn new() -> Self {
StringTreeCache(Default::default())
}
pub fn set(&mut self, key: &PyAny, value: String) -> Result<(), Error> {
let key = key
.iter()?
.map(|o| o.expect("iter failed").extract().expect("not a string"));
self.0.set(key, value)?;
Ok(())
}
// pub fn get_node(&self, key: &PyAny) -> Result<Option<&TreeCacheNode<K, PyObject>>, Error> {
// todo!()
// }
pub fn get(&self, key: &PyAny) -> Result<Option<&String>, Error> {
let key = key.iter()?.map(|o| {
o.expect("iter failed")
.extract::<String>()
.expect("not a string")
});
Ok(self.0.get(key)?)
}
// pub fn pop_node(&mut self, key: &PyAny) -> Result<Option<TreeCacheNode<K, PyObject>>, Error> {
// todo!()
// }
pub fn pop(&mut self, key: Vec<String>) -> Result<Option<String>, Error> {
Ok(self.0.pop(&key)?)
}
pub fn clear(&mut self) {
self.0.clear()
}
pub fn len(&self) -> usize {
self.0.len()
}
pub fn values(&self) -> Vec<&String> {
self.0.values().collect()
}
pub fn items(&self) -> Vec<(Vec<&HashablePyObject>, &PyObject)> {
todo!()
}
}
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