package io.github.yfedoseev.metaoxide.examples;
import io.github.yfedoseev.metaoxide.Extractor;
import io.github.yfedoseev.metaoxide.ExtractionResult;
import io.github.yfedoseev.metaoxide.MetaOxideException;
import java.util.Map;
/**
* Basic example demonstrating MetaOxide metadata extraction in Java.
*
* This example shows how to:
* - Extract all metadata formats at once
* - Access individual metadata fields
* - Handle errors properly
*
*/
public class BasicExample {
public static void main(String[] args) {
// Sample HTML with various metadata formats
String html = "\n" +
"\n" +
"\n" +
" Amazing Article About Rust\n" +
" \n" +
" \n" +
" \n" +
" \n" +
" \n" +
" \n" +
" \n" +
" \n" +
" \n" +
"\n" +
"\n" +
" \n" +
" Getting Started with Rust
\n" +
" \n" +
" \n" +
"\n" +
"";
try {
// Extract ALL metadata at once (most efficient!)
System.out.println("=== Extracting All Metadata ===\n");
ExtractionResult result = Extractor.extractAll(html, "https://example.com");
// Standard HTML meta tags
System.out.println("Standard Meta Tags:");
System.out.println(" Title: " + result.meta.get("title"));
System.out.println(" Description: " + result.meta.get("description"));
System.out.println(" Keywords: " + result.meta.get("keywords"));
System.out.println();
// Open Graph Protocol
System.out.println("Open Graph:");
System.out.println(" Title: " + result.openGraph.get("title"));
System.out.println(" Type: " + result.openGraph.get("type"));
System.out.println(" URL: " + result.openGraph.get("url"));
System.out.println(" Image: " + result.openGraph.get("image"));
System.out.println();
// Twitter Cards
System.out.println("Twitter Cards:");
System.out.println(" Card: " + result.twitter.get("card"));
System.out.println(" Title: " + result.twitter.get("title"));
System.out.println();
// JSON-LD
System.out.println("JSON-LD:");
if (!result.jsonLd.isEmpty()) {
@SuppressWarnings("unchecked")
Map article = (Map) result.jsonLd.get(0);
System.out.println(" Type: " + article.get("@type"));
System.out.println(" Headline: " + article.get("headline"));
@SuppressWarnings("unchecked")
Map author = (Map) article.get("author");
if (author != null) {
System.out.println(" Author: " + author.get("name"));
}
System.out.println(" Published: " + article.get("datePublished"));
}
System.out.println();
// Microformats
System.out.println("Microformats:");
if (result.microformats.containsKey("h-entry")) {
System.out.println(" Found h-entry microformat");
}
System.out.println();
// Summary
System.out.println(result);
System.out.println();
// Extract individual formats (less efficient, but available)
System.out.println("=== Extracting Individual Formats ===\n");
Map meta = Extractor.extractMeta(html, "https://example.com");
System.out.println("Meta tags count: " + meta.size());
Map og = Extractor.extractOpenGraph(html, "https://example.com");
System.out.println("Open Graph properties: " + og.size());
// Library version
System.out.println("\nMetaOxide version: " + Extractor.getVersion());
} catch (MetaOxideException e) {
System.err.println("Error extracting metadata: " + e.getMessage());
System.err.println("Error code: " + e.getErrorCode());
e.printStackTrace();
}
}
}