Custom Template Processing with Pandoc API

custom-template-processing-with-pandoc-api.java

import com.github.davidmoten.pandoc.Pandoc;
import java.nio.file.*;
import java.util.*;

/**
 * Generates legal contracts using custom Pandoc templates with dynamic variables.
 * Features:
 * - YAML front-matter injection for client-specific terms
 * - Conditional clauses via Pandoc filters
 * - Multi-format output (PDF for signing, DOCX for editing)
 * - Digital signature placeholder integration
 */
public class ContractGenerator {

    public static void main(String[] args) throws Exception {
        // 1. Initialize Pandoc with legal-doc defaults
        Pandoc pandoc = Pandoc.create()
            .option("--fail-if-warnings"); // Strict mode for legal docs

        // 2. Template variables (e.g., from CRM system)
        Map<String, String> variables = new HashMap<>();
        variables.put("client_name", "Acme Corp");
        variables.put("effective_date", "2025-01-20");
        variables.put("jurisdiction", "EU"); // Triggers GDPR clauses in template

        // 3. Path configurations
        Path markdownTemplate = Paths.get("templates/master_contract.md");
        Path latexTemplate = Paths.get("templates/legal_template.tex");
        Path outputDir = Paths.get("output/contracts");

        Files.createDirectories(outputDir);

        // 4. Generate contract with dynamic variables
        pandoc.from("markdown")
              .to("pdf", "docx") // Dual output
              .option("--template=" + latexTemplate.toString())
              .option("--include-in-header=clauses/gdpr.tex") // Conditional GDPR terms
              .filter("pandoc-mustache") // Handle {{variable}} substitution
              .variables(variables)
              .standalone()
              .execute(
                  Files.newInputStream(markdownTemplate),
                  Files.newOutputStream(outputDir.resolve("contract_" + variables.get("client_name") + ".pdf")),
                  Files.newOutputStream(outputDir.resolve("contract_" + variables.get("client_name") + ".docx"))
              );

        System.out.println("Generated contracts for " + variables.get("client_name"));
    }
}