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mod index;
mod result_row;
pub use index::*;
pub use result_row::*;
use crate::ast::ParameterizedValue;
use std::sync::Arc;
#[cfg(feature = "json-1")]
use serde_json::{Map, Value};
#[derive(Debug)]
pub struct ResultSet {
pub(crate) columns: Arc<Vec<String>>,
pub(crate) rows: Vec<Vec<ParameterizedValue<'static>>>,
}
impl ResultSet {
pub fn new(
names: Vec<String>,
rows: Vec<Vec<ParameterizedValue<'static>>>,
) -> Self
{
Self {
columns: Arc::new(names),
rows,
}
}
pub fn columns(&self) -> &Vec<String> {
&self.columns
}
pub fn len(&self) -> usize {
self.rows.len()
}
pub fn is_empty(&self) -> bool {
self.rows.is_empty()
}
pub fn first(&self) -> Option<ResultRowRef> {
self.get(0)
}
pub fn get(&self, index: usize) -> Option<ResultRowRef> {
self.rows.get(index).map(|row| ResultRowRef {
columns: Arc::clone(&self.columns),
values: row,
})
}
}
impl IntoIterator for ResultSet {
type Item = ResultRow;
type IntoIter = ResultSetIterator;
fn into_iter(self) -> Self::IntoIter {
ResultSetIterator {
columns: self.columns,
internal_iterator: self.rows.into_iter(),
}
}
}
pub struct ResultSetIterator {
pub(crate) columns: Arc<Vec<String>>,
pub(crate) internal_iterator: std::vec::IntoIter<Vec<ParameterizedValue<'static>>>,
}
impl Iterator for ResultSetIterator {
type Item = ResultRow;
fn next(&mut self) -> Option<Self::Item> {
match self.internal_iterator.next() {
Some(row) => Some(ResultRow {
columns: Arc::clone(&self.columns),
values: row,
}),
None => None,
}
}
}
#[cfg(feature = "json-1")]
impl From<ResultSet> for Value {
fn from(result_set: ResultSet) -> Self {
let columns: Vec<String> = result_set.columns().iter().map(ToString::to_string).collect();
let mut result = Vec::new();
for row in result_set.into_iter() {
let mut object = Map::new();
for (idx, p_value) in row.into_iter().enumerate() {
let column_name: String = columns[idx].clone();
object.insert(column_name, Value::from(p_value));
}
result.push(Value::Object(object));
}
Value::Array(result)
}
}