org.jgroups.util.XMLSchemaGenerator Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including
all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and
Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
package org.jgroups.util;
import org.jgroups.Version;
import org.jgroups.annotations.Property;
import org.jgroups.annotations.XmlAttribute;
import org.jgroups.annotations.XmlElement;
import org.jgroups.annotations.XmlInclude;
import org.jgroups.stack.Protocol;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.URL;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* Iterates over all concrete Protocol classes and creates XML schema used for validation of configuration files.
*
* https://jira.jboss.org/jira/browse/JGRP-448
*
* @author Vladimir Blagojevic
* @author Bela Ban
*
*/
public class XMLSchemaGenerator {
protected static final String PROT_PACKAGE="org.jgroups.protocols";
protected static final String[] PACKAGES={"", "pbcast", "tom", "relay", "rules"};
public static void main(String[] args) {
String outputDir = "./";
for (int i = 0; i < args.length; i++) {
String arg = args[i];
if ("-o".equals(arg)) {
outputDir = args[++i];
} else {
System.out.println("XMLSchemaGenerator -o ");
return;
}
}
File f = new File(outputDir, "jgroups-" + Version.major + "." + Version.minor + ".xsd");
try {
FileWriter fw = new FileWriter(f, false);
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
DOMImplementation impl = builder.getDOMImplementation();
Document xmldoc = impl.createDocument("http://www.w3.org/2001/XMLSchema", "xs:schema", null);
xmldoc.getDocumentElement().setAttribute("targetNamespace", "urn:org:jgroups");
xmldoc.getDocumentElement().setAttribute("elementFormDefault", "qualified");
xmldoc.getDocumentElement().setAttribute("attributeFormDefault", "qualified");
Element complexType = xmldoc.createElement("xs:complexType");
complexType.setAttribute("name", "ConfigType");
xmldoc.getDocumentElement().appendChild(complexType);
Element allType = xmldoc.createElement("xs:choice");
allType.setAttribute("maxOccurs", "unbounded");
complexType.appendChild(allType);
generateProtocolSchema(xmldoc, allType, PACKAGES);
Element xsElement = xmldoc.createElement("xs:element");
xsElement.setAttribute("name", "config");
xsElement.setAttribute("type", "ConfigType");
xmldoc.getDocumentElement().appendChild(xsElement);
DOMSource domSource = new DOMSource(xmldoc);
StreamResult streamResult = new StreamResult(fw);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer serializer = tf.newTransformer();
serializer.setOutputProperty(OutputKeys.METHOD, "xml");
serializer.setOutputProperty(OutputKeys.INDENT, "yes");
serializer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
serializer.transform(domSource, streamResult);
fw.flush();
fw.close();
} catch (Exception e) {
e.printStackTrace();
}
}
protected static void generateProtocolSchema(Document xmldoc, Element parent, String... suffixes) throws Exception {
for(String suffix: suffixes) {
String package_name=PROT_PACKAGE + (suffix == null || suffix.isEmpty()? "" : "." + suffix);
Set> classes=getClasses(Protocol.class, package_name);
for (Class clazz : classes)
classToXML(xmldoc, parent, clazz, package_name);
}
}
private static Set> getClasses(Class assignableFrom, String packageName)
throws IOException, ClassNotFoundException {
ClassLoader loader = Thread.currentThread().getContextClassLoader();
Set> classes = new HashSet<>();
String path = packageName.replace('.', '/');
URL resource = loader.getResource(path);
if (resource != null) {
String filePath = resource.getFile();
if (filePath != null && new File(filePath).isDirectory()) {
for (String file : new File(filePath).list()) {
if (file.endsWith(".class")) {
String name = packageName + '.' + file.substring(0, file.indexOf(".class"));
Class clazz = Class.forName(name);
if (assignableFrom.isAssignableFrom(clazz))
classes.add(clazz);
}
}
}
}
return classes;
}
private static void classToXML(Document xmldoc, Element parent, Class clazz,
String preAppendToSimpleClassName) throws Exception {
int mods=clazz.getModifiers();
boolean isConcreteClass=!Modifier.isAbstract(mods);
boolean is_public=Modifier.isPublic(mods);
boolean generate=is_public && isConcreteClass && !clazz.isAnonymousClass();
if(!generate)
return;
XmlInclude incl=Util.getAnnotation(clazz, XmlInclude.class);
if(incl != null) {
String[] schemas=incl.schema();
if(schemas != null) {
for(String schema: schemas) {
Element incl_el=xmldoc.createElement(incl.type() == XmlInclude.Type.IMPORT? "xs:import" : "xs:include");
if(incl.namespace() != null && !incl.namespace().isEmpty())
incl_el.setAttribute("namespace",incl.namespace());
incl_el.setAttribute("schemaLocation", schema);
Node first_child=xmldoc.getDocumentElement().getFirstChild();
if(first_child == null)
xmldoc.getDocumentElement().appendChild(incl_el);
else
xmldoc.getDocumentElement().insertBefore(incl_el, first_child);
}
}
if(incl.alias() != null && !incl.alias().isEmpty())
xmldoc.getDocumentElement().setAttribute("xmlns:" + incl.alias(), incl.namespace());
}
parent.appendChild(createXMLTree(xmldoc, clazz, preAppendToSimpleClassName));
}
private static Element createXMLTree(Document xmldoc, Class clazz, String pkgname) throws Exception {
Element classElement = xmldoc.createElement("xs:element");
String elementName = pkgname + "." + clazz.getSimpleName();
if(elementName == null || elementName.isEmpty()) {
throw new IllegalArgumentException("Cannot create empty attribute name for element xs:element, class is " + clazz);
}
elementName=elementName.replace(PROT_PACKAGE + ".", "");
classElement.setAttribute("name",elementName);
Element complexType = xmldoc.createElement("xs:complexType");
classElement.appendChild(complexType);
// the protocol has its own subtree
XmlElement el=Util.getAnnotation(clazz, XmlElement.class);
if(el != null) {
Element choice=xmldoc.createElement("xs:choice");
choice.setAttribute("minOccurs", "0");
choice.setAttribute("maxOccurs", "unbounded");
complexType.appendChild(choice);
Element tmp=xmldoc.createElement("xs:element");
tmp.setAttribute("name", el.name());
tmp.setAttribute("type", el.type());
choice.appendChild(tmp);
}
XmlAttribute xml_attr=Util.getAnnotation(clazz, XmlAttribute.class);
if(xml_attr != null) {
String[] attrs=xml_attr.attrs();
if(attrs != null && attrs.length > 0) {
Set set=new HashSet<>(Arrays.asList(attrs)); // to weed out dupes
for(String attr: set) {
Element attributeElement = xmldoc.createElement("xs:attribute");
attributeElement.setAttribute("name", attr);
attributeElement.setAttribute("type", "xs:string");
complexType.appendChild(attributeElement);
}
}
}
// iterate fields
for (Class clazzInLoop = clazz; clazzInLoop != null; clazzInLoop = clazzInLoop.getSuperclass()) {
Field[] fields = clazzInLoop.getDeclaredFields();
for (Field field : fields) {
if (field.isAnnotationPresent(Property.class)) {
String property = field.getName();
Property r = field.getAnnotation(Property.class);
boolean annotationRedefinesName =!r.name().isEmpty()
&& r.deprecatedMessage().isEmpty();
if (annotationRedefinesName) {
property = r.name();
}
if(property == null || property.isEmpty()) {
throw new IllegalArgumentException("Cannot create empty attribute name for element xs:attribute, field is " + field);
}
Element attributeElement = xmldoc.createElement("xs:attribute");
attributeElement.setAttribute("name", property);
// Agreement with Bela Ban on Jan-20-2009 (Go Obama!!!) to treat all types as
// xs:string since we do not know where users are going to use
// replacement tokens in configuration files. Therefore, the type becomes
// indeterminate.
attributeElement.setAttribute("type", "xs:string");
complexType.appendChild(attributeElement);
Element annotationElement = xmldoc.createElement("xs:annotation");
attributeElement.appendChild(annotationElement);
Element documentationElement = xmldoc.createElement("xs:documentation");
documentationElement.setTextContent(r.description());
annotationElement.appendChild(documentationElement);
}
}
}
// iterate methods
Method[] methods = clazz.getMethods();
for (Method method : methods) {
if (method.isAnnotationPresent(Property.class)) {
Property annotation = method.getAnnotation(Property.class);
String name = annotation.name();
if (name.length() < 1) {
name = Util.methodNameToAttributeName(method.getName());
}
Element attributeElement = xmldoc.createElement("xs:attribute");
attributeElement.setAttribute("name", name);
attributeElement.setAttribute("type", "xs:string");
complexType.appendChild(attributeElement);
String desc = annotation.description();
if (!desc.isEmpty()) {
Element annotationElement = xmldoc.createElement("xs:annotation");
attributeElement.appendChild(annotationElement);
Element documentationElement = xmldoc.createElement("xs:documentation");
documentationElement.setTextContent(annotation.description());
annotationElement.appendChild(documentationElement);
}
}
}
return classElement;
}
}
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