* </p>
 *
 * <p>
 * Example Usage:
 * </p>
 *
 * <pre>
 * XmlTransformer transformer = new XmlTransformer();
 * transformer.setNamespaceAware(true);
 * transformer.setCacheDuration(30);
 * transformer.addFieldRule("title", "/book/title/text()");

    public XmlTransformer xmlTransformer;

    public XmlTransformer xmlNsTransformer;

    public XmlTransformer xmlMapTransformer;

    public XmlTransformer xmlEntityTransformer;

    @Override
    protected void setUp() throws Exception {
        super.setUp();

        {
            xmlTransformer = new XmlTransformer();
            xmlTransformer.setName("xmlTransformer");

```

**Rule**: Pattern-based response routing (`RegexRule`, `SitemapsRule`)
**ResponseProcessor**: `DefaultResponseProcessor`, `SitemapsResponseProcessor`, `NullResponseProcessor`
**Transformer**: `HtmlTransformer`, `XmlTransformer`, `FileTransformer`, etc.
**Extractor**: Weight-based selection (tries in descending weight order)

### Key Extractors

import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

public class XslTransformer {
    public static void main(String[] args) throws TransformerException, IOException {
        if (args.length < 3 || args.length > 4) {

        fs.delete {
            delete(destDir, temporaryDir)
        }

        def xslClasspath = classpath.plus(objects.fileCollection().from(ClasspathUtil.getClasspathForClass(XslTransformer)))

        fs.copy {
            from(getStylesheetDirectory()) {
                include "**/*.xml"
                include "*.xsl"
            }