Struct PdfPreprocessor 

pub struct PdfPreprocessor { /* private fields */ }

PDF Preprocessor with pluggable backend

Processes PDF documents through two stages:

1. Backend extraction: PDF bytes → Blazegraph XHTML
2. XHTML parsing: Blazegraph XHTML → PreprocessorOutput

Implementations

impl PdfPreprocessor

pub fn new_with_jni( jre_path: &Path, jar_path: &Path, ) -> Result<PdfPreprocessor, Error>

Create PdfPreprocessor with JNI backend (default JVM settings)

Arguments

• jre_path - Path to JRE directory
• jar_path - Path to blazing-tika.jar

pub fn new_with_jni_args( jre_path: &Path, jar_path: &Path, jvm_args: &[String], ) -> Result<PdfPreprocessor, Error>

Create PdfPreprocessor with JNI backend and custom JVM arguments

Arguments

• jre_path - Path to JRE directory
• jar_path - Path to blazing-tika.jar
• jvm_args - Additional JVM arguments (e.g., “-Xmx4g”, “-XX:+UseG1GC”)

Example

let jvm_args = vec![
    "-Xms1g".to_string(),
    "-Xmx4g".to_string(),
    "-XX:+UseG1GC".to_string(),
    "-XX:MaxGCPauseMillis=100".to_string(),
];
let preprocessor = PdfPreprocessor::new_with_jni_args(&jre_path, &jar_path, &jvm_args)?;

pub fn backend_name(&self) -> &str

Get the backend name for logging

pub fn is_healthy(&self) -> bool

Check if the backend is healthy

Trait Implementations

impl Preprocessor for PdfPreprocessor

fn parse_pdf_to_markup_language( &self, pdf_bytes: &[u8], ) -> Result<String, Error>

Step 1: Extract PDF to XHTML via backend

fn parse_markup_to_preprocessor_output( &self, markup: &str, ) -> Result<PreprocessorOutput, Error>

Step 2: Parse XHTML to PreprocessorOutput

fn name(&self) -> &str

Get preprocessor name for debugging/logging

fn supports_file_type(&self, path: &Path) -> bool

Check if preprocessor supports the given file type

fn process(&self, document_bytes: &[u8]) -> Result<PreprocessorOutput, Error>

Convenience method: Full document processing (combines both steps)

fn process_file(&self, input: &Path) -> Result<PreprocessorOutput, Error>

Convenience method: Process from file path