NewsSitemapValidator.java

import java.io.File;

import javax.xml.transform.*;
import javax.xml.transform.stream.*;
import javax.xml.validation.*;

/*
 * Usage: download xsd's and sitemap
 *   $ wget http://www.google.com/schemas/sitemap-news/0.9/sitemap-news.xsd
 *   $ wget http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd
 *   $ wget http://kelisto.dev/news-sitemap.xml
 *
 * Compile me!
 *   $ javac NewsSitemapValidator.java
 *
 * And execute me!
 *   $ java NewsSitemapValidator
 */

class NewsSitemapValidator {
  private void validate(String xml, String xsd1, String xsd2) throws Exception {
    SchemaFactory sf = SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema");
    Schema schema = sf.newSchema(new Source[] {
      new StreamSource(new File(xsd1)),
      new StreamSource(new File(xsd2))
    });
    Validator v = schema.newValidator();
    v.validate(new StreamSource(xml));
  }

  public static void main(String args[]) {
    NewsSitemapValidator v = new NewsSitemapValidator();
    try {
      v.validate("news-sitemap.xml", "sitemap-news.xsd", "sitemap.xsd");
      System.out.println("no errors found! :)");
    } catch(Exception e) {
      System.err.println(e.getMessage());
    }
  }
}