Struct Part 

pub struct Part {
    pub content: PartContent,
    pub metadata: Option<Value>,
}

A content part within a Message or crate::artifact::Artifact.

Uses a type field discriminator per the A2A spec. In JSON:

• {"type": "text", "text": "hello"}
• {"type": "file", "file": {"name": "f.png", "mimeType": "image/png", "bytes": "..."}}
• {"type": "data", "data": {...}}

Fields

content: PartContent

The content of this part (text, file, or data).

metadata: Option<Value>

Arbitrary metadata for this part.

Implementations

impl Part

pub fn text(text: impl Into<String>) -> Self

Creates a text Part with the given content.

pub fn file_bytes(bytes: impl Into<String>) -> Self

Creates a file Part from raw bytes (base64-encoded).

pub fn file_uri(uri: impl Into<String>) -> Self

Creates a file Part from a URI.

pub const fn file(file: FileContent) -> Self

Creates a file Part with full metadata.

pub const fn data(data: Value) -> Self

Creates a data Part carrying structured JSON.

pub fn raw(raw: impl Into<String>) -> Self

Creates a raw (bytes) Part with base64-encoded data.

Deprecated: Use Part::file_bytes instead. This constructor exists for backward compatibility during the v0.2→v0.3 migration.

pub fn url(url: impl Into<String>) -> Self

Creates a URL Part.

Deprecated: Use Part::file_uri instead. This constructor exists for backward compatibility during the v0.2→v0.3 migration.

Trait Implementations

impl Clone for Part

fn clone(&self) -> Part

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Part

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Part

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Part

fn eq(&self, other: &Part) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Part

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Part

impl StructuralPartialEq for Part