I'm trying to get all the data objects(variables alone, not its functions et al) of one class ( objectfactory.java
) and also, invoke the methods in itself, that create instances of other classes in the same package, and this way, make a list of all the objects in all the classes in a given package. (to put things in perspective, these are classes created by JAXB).
That is, what I basically want to do is, iterate through, and make a list of all the data objects of:
Objectfactory, and then,
- Person
- Name
- Url
- Link
- Personnel
classes.
Here is the objectFactory class:
@XmlRegistry
public class ObjectFactory {
private final static QName _Given_QNAME = new QName("", "given");
private final static QName _Email_QNAME = new QName("", "email");
private final static QName _Family_QNAME = new QName("", "family");
/**
* Create a new ObjectFactory that can be used to create new instances of schema derived classes for package: schema
*
*/
public ObjectFactory() {
}
public Person createPerson() {
return new Person();
}
public Name createName() {
return new Name();
}
public Url createUrl() {
return new Url();
}
public Link createLink() {
return new Link();
}
public Personnel createPersonnel() {
return new Personnel();
}
@XmlElementDecl(namespace = "", name = "given")
public JAXBElement<String> createGiven(String value) {
return new JAXBElement<String>(_Given_QNAME, String.class, null, value);
}
@XmlElementDecl(namespace = "", name = "email")
public JAXBElement<String> createEmail(String value) {
return new JAXBElement<String>(_Email_QNAME, String.class, null, value);
}
@XmlElementDecl(namespace = "", name = "family")
public JAXBElement<String> createFamily(String value) {
return new JAXBElement<String>(_Family_QNAME, String.class, null, value);
}
}
I could go directly only until the fields and methods in ObjectFactory using Java Reflections.(getDeclaredFields()) etc.
But, for the other classes, I can only manually reach their objects. (For eg, for Class Link)
ObjectFactory factory= new ObjectFactory();
Field[] fields = factory.createLink().getClass().getDeclaredFields();
Field[] fields1 = factory.createPerson().getClass().getDeclaredFields();
for (Field f1 : fields1) {
System.out.println("field name = " + f1.getName());
}
but, I want to do this at runtime for all the classes in objectfactory, and not manually by making calls like "createPerson()".
I tried doing something like this;
ObjectFactory factory= new ObjectFactory();
Method[] methods = factory.getClass().getDeclaredMethods();
for (Method m : methods) {
System.out.println("Class name = " + m.getName());
Field[] subfields = m.getClass().getDeclaredFields();
for (Field sf : subfields) {
System.out.println("entities = " + sf.getName());
}
System.out.println("\n\n");
}
But this doesn't work.
My expected output would be something like this:
Class name = ObjectFactory
field name = _Given_QNAME
field name = _Email_QNAME
field name = _Family_QNAME
Class name = Person
field name = Name
field name = Age
field name = Sex
Class name = Personnel
field name = address
...
and so on..
How do I do this?
public void getAllClassAndFields() {
ObjectFactory objectFactory = new ObjectFactory();
Method[] methods = objectFactory.getClass().getDeclaredMethods();
for (Method method : methods) {
try {
// Check if method have XmlElementDecl annotation
XmlElementDecl annotation = method.getAnnotation(XmlElementDecl.java);
if (annotation == null) {
// Invoke method only if it is not annoatated with XmlElementDecl
Object object = method.invoke(objectFactory, new Object[] {});
System.out.println("Class Name = " + object.getClass().getName());
printFileds(object);
}
} catch (Exception e) {
// I used Exception to keep it simple, instead use appropriate exception types here
}
}
}
public static void printFileds(Object obj) {
Field[] fields = obj.getClass().getFields();
for (Field field : fields) {
System.out.println("Field Name = " + field.getName());
}
}
Not sure why do you want to do this?
But try the code below
public class RelectionTestCases {
public static final String INDENT = " ";
public static void main(String[] args) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException {
ObjectFactory factory = new ObjectFactory();
Field[] fields = ObjectFactory.class.getDeclaredFields();
// Fields
System.out.println(ObjectFactory.class.getName());
for (Field field : fields) {
System.out.println(INDENT + field.getName());
}
// Method
Method[] methods = ObjectFactory.class.getDeclaredMethods();
for (Method method : methods) {
if (method.getReturnType().equals(JAXBElement.class)) {
continue;
}
Object object = method.invoke(factory, null);
System.out.println(object.getClass().getName());
Field[] subFields = object.getClass().getDeclaredFields();
for (Field field : subFields) {
System.out.println(INDENT + field.getName());
}
}
}
}
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