xmlformatter-native-image

formatter.xlst

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output omit-xml-declaration="yes" indent="yes"/>
    <xsl:strip-space elements="*"/>

    <xsl:template match="@*|node()">
        <xsl:copy>
            <xsl:apply-templates select="@*|node()"/>
        </xsl:copy>
    </xsl:template>

</xsl:stylesheet>

Makefile

JAR=xmlformatter.jar

XmlFormatter.class: XmlFormatter.java
	javac XmlFormatter.java

$(JAR): XmlFormatter.class formatter.xlst
	jar --create --file $(JAR) --main-class=XmlFormatter XmlFormatter.class formatter.xlst

cfg: $(JAR)
	java -agentlib:native-image-agent=config-output-dir=cfg -jar $(JAR) test.xml

xmlformatter: cfg
	native-image --verbose -H:ConfigurationFileDirectories=cfg -H:+AllowIncompleteClasspath -jar $(JAR)

test.xml

<point><x>1</x><y>y</y></point>

XmlFormatter.java

import java.io.*;
import java.nio.file.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import org.w3c.dom.*;

public class XmlFormatter {
    public static void main(String[] args) throws Exception {
        var xmlPath = Path.of(args[0]);
        var dbf = DocumentBuilderFactory.newInstance();
        var db = dbf.newDocumentBuilder();
        Document doc;
        try (var is = Files.newInputStream(xmlPath)) {
            doc = db.parse(is);
        }
        var tf = TransformerFactory.newInstance();

        Transformer transformer;
        try (var xlst = XmlFormatter.class.getClassLoader().getResourceAsStream("formatter.xlst")) {
            System.out.println("xlst = " + xlst);
            transformer = tf.newTransformer(new StreamSource(xlst));
        }

        var domSource = new DOMSource(doc);
        try (var os = Files.newOutputStream(xmlPath)) {
            var streamResult = new StreamResult(os);
            transformer.transform(domSource, streamResult);
        }
    }
}