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// Copyright (C) 2024 Philipp Benner
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the “Software”), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
use std::io;
use std::str::FromStr;
use crate::meta::{Meta, MetaData};
/* -------------------------------------------------------------------------- */
pub struct MetaTableReader<'a> {
idx_map : std::collections::HashMap<&'a str, i32>,
meta_map : std::collections::HashMap<&'a str, MetaData>
}
/* -------------------------------------------------------------------------- */
impl<'a> MetaTableReader<'a> {
pub fn new(names: &[&'a str], types: &[&'a str]) -> Self {
if names.len() != types.len() {
panic!("invalid arguments");
}
let mut idx_map = std::collections::HashMap::new();
let mut meta_map = std::collections::HashMap::new();
for i in 0..names.len() {
idx_map.insert(names[i], -1);
match types[i] {
"String" => meta_map.insert(names[i], MetaData::StringArray(Vec::new())),
"Int" => meta_map.insert(names[i], MetaData::IntArray(Vec::new())),
"Float" => meta_map.insert(names[i], MetaData::FloatArray(Vec::new())),
"Vec<String>" => meta_map.insert(names[i], MetaData::StringMatrix(Vec::new())),
"Vec<Int>" => meta_map.insert(names[i], MetaData::IntMatrix(Vec::new())),
"Vec<Float>" => meta_map.insert(names[i], MetaData::FloatMatrix(Vec::new())),
_ => panic!("invalid types argument"),
};
}
MetaTableReader{
idx_map : idx_map,
meta_map: meta_map,
}
}
pub fn read_header(&mut self, line: &String) -> io::Result<()> {
let fields: Vec<&str> = line.split_whitespace().collect();
for (i, field) in fields.iter().enumerate() {
if let Some(idx) = self.idx_map.get_mut(*field) {
*idx = i as i32;
}
}
Ok(())
}
pub fn read_line(&mut self, line: &String, i: i32) -> io::Result<()> {
let fields: Vec<&str> = line.split_whitespace().collect();
for (name, idx) in &self.idx_map {
if *idx == -1 {
continue;
}
if *idx >= fields.len() as i32 {
return Err(io::Error::new(io::ErrorKind::InvalidData, "invalid table"));
}
match self.meta_map.get_mut(name).unwrap() {
MetaData::StringArray(v) => {
v.push(fields[*idx as usize].to_string());
}
MetaData::IntArray(v) => {
let value = i64::from_str(fields[*idx as usize]).map_err(|e| {
io::Error::new(
io::ErrorKind::InvalidData,
format!("parsing meta information failed at line `{}`: {}", i, e),
)
})?;
v.push(value);
}
MetaData::FloatArray(v) => {
if fields[*idx as usize] == "NA" || fields[*idx as usize] == "NaN" {
v.push(f64::NAN);
} else {
let value = f64::from_str(fields[*idx as usize]).map_err(|e| {
io::Error::new(
io::ErrorKind::InvalidData,
format!("parsing meta information failed at line `{}`: {}", i, e),
)
})?;
v.push(value);
}
}
MetaData::IntMatrix(v) => {
let data: Vec<&str> = fields[*idx as usize].split(',').collect();
if data.len() == 1 && data[0] == "nil" {
v.push(Vec::<i64>::new());
} else {
let mut entry = Vec::with_capacity(data.len());
for d in data {
let value = i64::from_str(d).map_err(|e| {
io::Error::new(
io::ErrorKind::InvalidData,
format!("parsing meta information failed at line `{}`: {}", i, e),
)
})?;
entry.push(value);
}
v.push(entry);
}
}
MetaData::FloatMatrix(v) => {
let data: Vec<&str> = fields[*idx as usize].split(',').collect();
if data.len() == 1 && data[0] == "nil" {
v.push(Vec::<f64>::new());
} else {
let mut entry = Vec::with_capacity(data.len());
for d in data {
let value = f64::from_str(d).map_err(|e| {
io::Error::new(
io::ErrorKind::InvalidData,
format!("parsing meta information failed at line `{}`: {}", i, e),
)
})?;
entry.push(value);
}
v.push(entry);
}
}
MetaData::StringMatrix(v) => {
let data: Vec<&str> = fields[*idx as usize].split(',').collect();
if data.len() == 1 && data[0] == "nil" {
v.push(Vec::<String>::new());
} else {
let mut entry = Vec::with_capacity(data.len());
for d in data {
entry.push(d.to_string());
}
v.push(entry);
}
}
_ => unreachable!(),
}
}
Ok(())
}
pub fn push(&mut self, meta: &mut Meta) {
for (name, idx) in &self.idx_map {
if *idx != -1 {
if let Err(_) = meta.add(&name, self.meta_map.remove(name).unwrap()) {
panic!("internal error")
}
}
}
}
}