Struct JsonPropertyMap

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pub struct JsonPropertyMap(/* private fields */);

Implementations§

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impl JsonPropertyMap

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pub fn new() -> Self

Create a new property map with no mappings.

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pub fn get(&self, property_name: &str) -> Option<&JsonNode>

Get the JsonNode associated with a name.

§Arguments

property_name - The name of the property you want.

§Examples

use json_node::{JsonNode, JsonPropertyMap};
 
// Create node with mappings.
let object_node = JsonNode::Object(JsonPropertyMap::from([
    ("name".to_owned(), JsonNode::String("John Doe".to_owned())),
    ("age".to_owned(), JsonNode::Integer(42)),
]));
 
let map = object_node.as_object().unwrap(); // &JsonPropertyMap.
let property = map.get("name").unwrap(); // &JsonNode.
let name = property.as_string().unwrap(); // &str.
 
assert_eq!(name, "John Doe");

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pub fn get_mut(&mut self, property_name: &str) -> Option<&mut JsonNode>

Get the JsonNode associated with a name as a mutable value.

§Arguments

property_name - The name of the property you want.

§Examples

use json_node::{JsonNode, JsonPropertyMap};
 
// Create node with mappings.
let mut object_node = JsonNode::Object(JsonPropertyMap::from([
    ("name".to_owned(), JsonNode::String("John Doe".to_owned())),
    ("age".to_owned(), JsonNode::Integer(42)),
]));
 
let mut_map = object_node.as_object_mut().unwrap(); // &mut JsonPropertyMap.
let mut_property = mut_map.get_mut("name").unwrap(); // &mut JsonNode.
let mut_name = mut_property.as_string_mut().unwrap(); // &mut str.
 
mut_name.make_ascii_uppercase(); // Mutates the string slice.
 
let map = object_node.as_object().unwrap(); // &JsonPropertyMap.
let property = map.get("name").unwrap(); // &JsonNode.
let name = property.as_string().unwrap(); // &String.
 
assert_eq!(name, "JOHN DOE");

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pub fn add(&mut self, property_name: &str, json_node: JsonNode)

Adds a new mapping to the object.

§Arguments

property_name - Name of the new property.
json_node - The JsonNode to be associated with the property_name.

§Examples

use json_node::{JsonNode, JsonPropertyMap};
 
let mut map = JsonPropertyMap::new();
 
map.add("number", JsonNode::Integer(42));
 
let expected = JsonPropertyMap::from([
    ("number".to_owned(), JsonNode::Integer(42))
]);
 
assert_eq!(map, expected);

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pub fn remove(&mut self, property_name: &str) -> Result<JsonNode>

Removes a mapping from the object if it exists.

§Arguments

property_name - Name of the property to be removed.

§Examples

use json_node::{JsonNode, JsonPropertyMap};
 
let mut map = JsonPropertyMap::from([
    ("number".to_owned(), JsonNode::Integer(42))
]);
 
map.remove("number");
 
let expected = JsonPropertyMap::new();
assert_eq!(map, expected);

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pub fn contains_property(&self, property_name: &str) -> bool

Checks if a property with the name property_name exists.

§Arguments

property_name - The name to check for.

§Examples

use json_node::{JsonNode, JsonPropertyMap};
 
let mut map = JsonPropertyMap::from([
    ("number".to_owned(), JsonNode::Integer(42))
]);
 
assert!(map.contains_property("number"));
assert!(!map.contains_property("name"));

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