Value

Struct Value 

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pub struct Value(pub Value);
Expand description

Dynamic value for field access and condition evaluation.

Wraps serde_json::Value to provide type-safe field extraction and comparison operations used by flow control nodes.

Tuple Fields§

§0: Value

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impl Value

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pub fn null() -> Self

Create a null value.

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pub fn bool(v: bool) -> Self

Create a boolean value.

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pub fn int(v: i64) -> Self

Create an integer value.

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pub fn float(v: f64) -> Self

Create a floating-point value.

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

Create a string value.

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pub fn from_bytes(bytes: &[u8]) -> Result<Self>

Create a value from JSON bytes.

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pub fn to_bytes(&self) -> Result<Vec<u8>>

Serialize to JSON bytes.

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pub fn is_null(&self) -> bool

Check if the value is null.

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pub fn get_field(&self, path: &str) -> Option<Value>

Get a field by path (dot notation or JSONPath-like).

Supports:

  • Simple field access: “field”
  • Dot notation: “parent.child.value”
  • JSONPath prefix: “$.parent.child” -> “parent.child”

Returns None if the field doesn’t exist.

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pub fn get_string(&self, path: &str) -> Option<String>

Get a field as a string.

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pub fn get_f64(&self, path: &str) -> Option<f64>

Get a field as an f64.

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pub fn get_bool(&self, path: &str) -> Option<bool>

Get a field as a bool.

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pub fn as_string(&self) -> Option<String>

Convert to string if possible.

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pub fn as_f64(&self) -> Option<f64>

Convert to f64 if possible.

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pub fn as_bool(&self) -> Option<bool>

Convert to bool if possible.

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pub fn equals_str(&self, other: &str) -> bool

Check equality with a string value.

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pub fn field_equals(&self, path: &str, value: &str) -> bool

Check if a field equals a value (string comparison).

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pub fn field_greater_than(&self, path: &str, threshold: f64) -> bool

Check if a field is greater than a threshold (numeric comparison).

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pub fn field_less_than(&self, path: &str, threshold: f64) -> bool

Check if a field is less than a threshold (numeric comparison).

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pub fn field_matches(&self, path: &str, pattern: &str) -> bool

Check if a field matches a regex pattern.

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pub fn field_is_true(&self, path: &str) -> bool

Check if a boolean field is true.

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pub fn field_is_false(&self, path: &str) -> bool

Check if a boolean field is false.

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pub fn inner(&self) -> &JsonValue

Access the inner serde_json::Value.

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pub fn into_inner(self) -> JsonValue

Convert into the inner serde_json::Value.

Trait Implementations§

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impl Clone for Value

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fn clone(&self) -> Value

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Value

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

Formats the value using the given formatter. Read more
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impl Default for Value

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<'de> Deserialize<'de> for Value

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl From<&str> for Value

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fn from(s: &str) -> Self

Converts to this type from the input type.
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impl From<String> for Value

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fn from(s: String) -> Self

Converts to this type from the input type.
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impl From<Value> for Value

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fn from(v: JsonValue) -> Self

Converts to this type from the input type.
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impl From<Value> for Value

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fn from(v: Value) -> Self

Converts to this type from the input type.
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impl From<bool> for Value

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fn from(v: bool) -> Self

Converts to this type from the input type.
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impl From<f64> for Value

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fn from(v: f64) -> Self

Converts to this type from the input type.
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impl From<i64> for Value

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fn from(v: i64) -> Self

Converts to this type from the input type.
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impl PartialEq for Value

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for Value

Auto Trait Implementations§

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impl Freeze for Value

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impl RefUnwindSafe for Value

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impl Send for Value

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impl Sync for Value

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impl Unpin for Value

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impl UnwindSafe for Value

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> ArchivePointee for T

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type ArchivedMetadata = ()

The archived version of the pointer metadata for this type.
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fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata

Converts some archived metadata to the pointer metadata for itself.
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> LayoutRaw for T

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fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>

Returns the layout of the type.
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impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
where T: SharedNiching<N1, N2>, N1: Niching<T>, N2: Niching<T>,

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unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool

Returns whether the given value has been niched. Read more
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fn resolve_niched(out: Place<NichedOption<T, N1>>)

Writes data to out indicating that a T is niched.
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impl<T> Pointee for T

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type Metadata = ()

The metadata type for pointers and references to this type.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,