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use std::fmt;
use std::hash::{Hash, Hasher};
use csv_sniffer;
#[derive(Debug, Clone)]
pub enum FieldIdent {
Index(usize),
Name(String)
}
impl FieldIdent {
pub fn to_string(&self) -> String {
match *self {
FieldIdent::Index(i) => format!("Field {}", i),
FieldIdent::Name(ref s) => s.clone(),
}
}
}
impl fmt::Display for FieldIdent {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
write!(f, "{}", self.to_string())
}
}
impl PartialEq for FieldIdent {
fn eq(&self, other: &FieldIdent) -> bool {
self.to_string().eq(&other.to_string())
}
}
impl Eq for FieldIdent {}
impl Hash for FieldIdent {
fn hash<H>(&self, state: &mut H) where H: Hasher {
self.to_string().hash(state)
}
}
impl From<usize> for FieldIdent {
fn from(src: usize) -> FieldIdent {
FieldIdent::Index(src)
}
}
impl<'a> From<&'a str> for FieldIdent {
fn from(src: &'a str) -> FieldIdent {
FieldIdent::Name(src.to_string())
}
}
impl From<String> for FieldIdent {
fn from(src: String) -> FieldIdent {
FieldIdent::Name(src)
}
}
#[derive(Debug, Copy, Clone, PartialEq, Serialize, Deserialize)]
pub enum FieldType {
Unsigned,
Signed,
Text,
Boolean,
Float
}
impl From<csv_sniffer::Type> for FieldType {
fn from(orig: csv_sniffer::Type) -> FieldType {
match orig {
csv_sniffer::Type::Unsigned => FieldType::Unsigned,
csv_sniffer::Type::Signed => FieldType::Signed,
csv_sniffer::Type::Text => FieldType::Text,
csv_sniffer::Type::Boolean => FieldType::Boolean,
csv_sniffer::Type::Float => FieldType::Float,
}
}
}
impl fmt::Display for FieldType {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
match *self {
FieldType::Unsigned => write!(f, "unsigned"),
FieldType::Signed => write!(f, "signed"),
FieldType::Text => write!(f, "text"),
FieldType::Boolean => write!(f, "boolean"),
FieldType::Float => write!(f, "float"),
}
}
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct RFieldIdent {
pub ident: FieldIdent,
pub rename: Option<String>,
}
impl RFieldIdent {
pub fn to_string(&self) -> String {
self.rename.clone().unwrap_or(self.ident.to_string())
}
pub fn to_renamed_field_ident(&self) -> FieldIdent {
match self.rename {
Some(ref renamed) => FieldIdent::Name(renamed.clone()),
None => self.ident.clone()
}
}
}
#[derive(Debug, Clone)]
pub struct TypedFieldIdent {
pub ident: FieldIdent,
pub ty: FieldType
}
impl TypedFieldIdent {
pub fn new(ident: FieldIdent, ty: FieldType) -> TypedFieldIdent {
TypedFieldIdent {
ident: ident,
ty: ty
}
}
}
#[derive(Debug, Clone)]
pub struct SrcField {
pub ty_ident: TypedFieldIdent,
pub src_index: usize,
}
impl SrcField {
pub fn new(ident: FieldIdent, ty: FieldType, src_index: usize) -> SrcField {
SrcField {
ty_ident: TypedFieldIdent::new(ident, ty),
src_index: src_index
}
}
pub fn from_ty_ident(ty_ident: TypedFieldIdent, src_index: usize) -> SrcField {
SrcField {
ty_ident: ty_ident,
src_index: src_index
}
}
}
#[derive(Debug, Clone)]
pub struct DsField {
pub ty_ident: TypedFieldIdent,
pub ds_index: usize,
}
impl DsField {
pub fn new(ident: FieldIdent, ty: FieldType, ds_index: usize) -> DsField {
DsField {
ty_ident: TypedFieldIdent::new(ident, ty),
ds_index: ds_index,
}
}
pub fn from_typed_field_ident(ty_ident: TypedFieldIdent, ds_index: usize) -> DsField {
DsField {
ty_ident: ty_ident,
ds_index: ds_index,
}
}
pub fn from_src(src: &SrcField, ds_index: usize) -> DsField {
DsField {
ty_ident: src.ty_ident.clone(),
ds_index: ds_index
}
}
}
#[macro_export]
macro_rules! fields {
($($name:expr => $ty:expr),*) => {{
use $crate::field::TypedFieldIdent;
vec![$(
TypedFieldIdent::new(
FieldIdent::Name($name.to_string()),
$ty
)
),*]
}}
}