votable 0.7.0

Rust implementation of a VOTable serializer/deserializer with support for format other than XML, such as JSON, TOML or YAML.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134

//! Struct dedicated to the `FIELDref` tag.

use std::{collections::HashMap, str};

use paste::paste;
use serde_json::Value;

use super::{
  error::VOTableError, HasContent, HasContentElem, TableDataContent, VOTableElement, VOTableVisitor,
};

/// Struct corresponding to the `FIELDRef` XML tag.
#[derive(Clone, Debug, PartialEq, serde::Serialize, serde::Deserialize)]
pub struct FieldRef {
  #[serde(rename = "ref")]
  pub ref_: String,
  #[serde(skip_serializing_if = "Option::is_none")]
  pub ucd: Option<String>,
  #[serde(skip_serializing_if = "Option::is_none")]
  pub utype: Option<String>,
  // extra attributes
  #[serde(flatten, skip_serializing_if = "HashMap::is_empty")]
  pub extra: HashMap<String, Value>,
  // content
  #[serde(skip_serializing_if = "Option::is_none")]
  pub content: Option<String>,
}

impl FieldRef {
  pub fn new<S: Into<String>>(ref_: S) -> Self {
    Self {
      ref_: ref_.into(),
      ucd: None,
      utype: None,
      extra: Default::default(),
      content: None,
    }
  }

  // attributes
  impl_builder_mandatory_string_attr!(ref_, ref);
  impl_builder_opt_string_attr!(ucd);
  impl_builder_opt_string_attr!(utype);
  // extra attributes
  impl_builder_insert_extra!();

  pub fn visit<C, V>(&mut self, visitor: &mut V) -> Result<(), V::E>
  where
    C: TableDataContent,
    V: VOTableVisitor<C>,
  {
    visitor.visit_fieldref(self)
  }
}

impl_has_content!(FieldRef);

impl VOTableElement for FieldRef {
  const TAG: &'static str = "FIELDref";

  type MarkerType = HasContentElem;

  fn from_attrs<K, V, I>(attrs: I) -> Result<Self, VOTableError>
  where
    K: AsRef<str> + Into<String>,
    V: AsRef<str> + Into<String>,
    I: Iterator<Item = (K, V)>,
  {
    const DEFAULT_VALUE: &str = "@TBD";
    Self::new(DEFAULT_VALUE)
      .set_attrs(attrs)
      .and_then(|fieldref| {
        if fieldref.ref_.as_str() == DEFAULT_VALUE {
          Err(VOTableError::Custom(format!(
            "Mandatory attribute 'ref' not found in tag '{}'",
            Self::TAG
          )))
        } else {
          Ok(fieldref)
        }
      })
  }

  fn set_attrs_by_ref<K, V, I>(&mut self, attrs: I) -> Result<(), VOTableError>
  where
    K: AsRef<str> + Into<String>,
    V: AsRef<str> + Into<String>,
    I: Iterator<Item = (K, V)>,
  {
    for (key, val) in attrs {
      let key = key.as_ref();
      match key {
        "ref" => self.set_ref_by_ref(val),
        "ucd" => self.set_ucd_by_ref(val),
        "utype" => self.set_utype_by_ref(val),
        _ => self.insert_extra_str_by_ref(key, val),
      }
    }
    Ok(())
  }

  fn for_each_attribute<F>(&self, mut f: F)
  where
    F: FnMut(&str, &str),
  {
    f("ref", self.ref_.as_str());
    if let Some(ucd) = &self.ucd {
      f("ucd", ucd.as_str());
    }
    if let Some(utype) = &self.utype {
      f("utype", utype.as_str());
    }
    for_each_extra_attribute!(self, f);
  }
}

#[cfg(test)]
mod tests {
  use crate::{
    fieldref::FieldRef,
    tests::{test_read, test_writer},
  };

  #[test]
  fn test_fieldref_read_write() {
    let xml = r#"<FIELDref ref="col4" ucd="UCD" utype="ut"></FIELDref>"#; // Test read
    let field = test_read::<FieldRef>(xml);
    assert_eq!(field.ref_.as_str(), "col4");
    assert_eq!(field.utype, Some("ut".to_string()));
    assert_eq!(field.ucd, Some("UCD".to_string()));
    // Test write
    test_writer(field, xml)
  }
}