Class PartUtils

java.lang.Object

uno.anahata.ai.internal.PartUtils

public class PartUtils
extends Object

Utility methods for working with Gemini Part objects.

This class provides helpers for converting files to blobs, calculating the size of parts in bytes, and estimating token counts.

Author:

anahata

Constructor Summary

Constructors

Constructor	Description
PartUtils()

Method Summary

Modifier and Type	Method	Description
static int	calculateApproxTokenSize(com.google.genai.types.Part part)	Estimates the token count of a Part using a simple heuristic (bytes / 4).
static long	calculateSizeInBytes(com.google.genai.types.Part part)	Calculates the size of a Part in bytes when serialized to JSON.
static com.google.genai.types.Part	toPart(File file)	Converts a local file into a Gemini Part containing a Blob.
static String	toString(com.google.genai.types.Blob blob)	Returns a human-readable string representation of a Blob.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

PartUtils

public PartUtils()

Method Details

toPart

public static com.google.genai.types.Part toPart(File file)
                                          throws IOException

Converts a local file into a Gemini Part containing a Blob.

It uses Apache Tika to automatically detect the MIME type of the file.

Parameters:

file - The file to convert.

Returns:

A Part object containing the file's data and MIME type.

Throws:

IOException - if the file cannot be read.

toString

public static String toString(com.google.genai.types.Blob blob)

Returns a human-readable string representation of a Blob.

Parameters:

blob - The blob to describe.

Returns:

A string containing the MIME type and size in bytes.

calculateSizeInBytes

public static long calculateSizeInBytes(com.google.genai.types.Part part)

Calculates the size of a Part in bytes when serialized to JSON.

Parameters:

part - The part to measure.

Returns:

The size in bytes.

calculateApproxTokenSize

public static int calculateApproxTokenSize(com.google.genai.types.Part part)

Estimates the token count of a Part using a simple heuristic (bytes / 4).

This is a rough approximation and may vary depending on the model's tokenizer.

Parameters:

part - The part to analyze.

Returns:

The approximate number of tokens.