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impl AprTransformer {
/// Load APR transformer from an APR v2 file
///
/// Parses the APR v2 format (magic "APR2") and extracts transformer weights.
///
/// # Arguments
///
/// * `path` - Path to .apr file
///
/// # Returns
///
/// Loaded transformer ready for inference
///
/// # Errors
///
/// Returns error if file cannot be read or parsed
///
/// # Example
///
/// ```rust,ignore
/// let transformer = AprTransformer::from_apr_file("model.apr")?;
/// let logits = transformer.forward(&[1, 2, 3])?;
/// ```
pub fn from_apr_file<P: AsRef<Path>>(path: P) -> Result<Self> {
use std::io::Read;
let mut file = File::open(path.as_ref()).map_err(|e| RealizarError::IoError {
message: format!("Failed to open APR file: {e}"),
})?;
let mut data = Vec::new();
file.read_to_end(&mut data)
.map_err(|e| RealizarError::IoError {
message: format!("Failed to read APR file: {e}"),
})?;
Self::from_apr_bytes(&data)
}
/// Load APR transformer from file with validation (PMAT-235)
///
/// Loads and then validates ALL tensors using `ValidatedAprTransformer::validate()`.
/// Returns a wrapper that `Deref`s to `AprTransformer` for transparent access.
///
/// # Errors
///
/// Returns error if the file cannot be read, parsed, or if any tensor fails validation.
pub fn from_apr_file_validated<P: AsRef<Path>>(
path: P,
) -> Result<crate::safetensors::validation::ValidatedAprTransformer> {
let transformer = Self::from_apr_file(path)?;
crate::safetensors::validation::ValidatedAprTransformer::validate(transformer)
.map_err(Into::into)
}
}