JAVA Object to XML to JAVA to XML

[buntyindia]

In one of my project below is my requirement:-

-Create input XMLs from Java class..
-Take input from user then store that data to Java object and submit for processing
-After processing print response java object again in XML.

What is the best API to achieve this. Will be helpful if any example is available.

[d3n1s]

In one of my project below is my requirement:-

-Create input XMLs from Java class..
-Take input from user then store that data to Java object and submit for processing
-After processing print response java object again in XML.

What is the best API to achieve this. Will be helpful if any example is available.

XMLSerializer is exactly what you want. I don't have code examples right now but once i get back home i can post a few. A quick search on google should get you in the right direction though.

[cld71]

If you are using Java Beans to hold the data, then you can use java.beans.XMLDecoder and java.beans.XMLEncoder.

[buntyindia]

Thanks for the Reply =)

I have a Java Object that have some fileds like arraylist<Class> will it take care of these fields as well ?

If that arrayList<Class> have another fields that can be normal fileds or arraylist of another class, will it take care of all fields during XML generation?

Example:-

Root Class have below fields
private int ArCt;
private ArrayList<ClassChild1> Ar;
......
Setters
......
Getters

ClassChild1.class
private int PlnCd;
private int cArCt;
private ArrayList cAr<ClassChild2> cAr;

ClassChild2.class
private String PlNm

XML Needed - Example from above object

<root>
<ArCt>1</ArCt>
<Ar>
<ClassChild1>
<PlnCd>S</PlnCd>
<cArCt>2</<cArCt>
<cAr>
<ClassChild2>
<PlNm>Plan1</PlNm>
</ClassChild2>
<ClassChild2>
<PlNm>Plan2</PlNm>
</ClassChild2>
</cAr>
</ClassChild1>
</Ar>
</root>

[j2me64]

Thanks for the Reply =)

I have a Java Object that have some fileds like arraylist<Class> will it take care of these fields as well ?

i made a test with xstream
since this is the xml api i know (and also used in the persistence tutorial found in my signature). first i create some instances with:

import java.util.ArrayList;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;

class Root {
	private int ArCt;
	private ArrayList<ClassChild1> Ar;

	public Root() {
		// create arraylist for Ar
		Ar = new ArrayList<ClassChild1>();
		// create one child1
		ClassChild1 c1 = new ClassChild1();
		ClassChild2 c2 = new ClassChild2();
		c1.PlnCd = 10;
		c1.cArCt = 20;
		c2.PlNm = "PlNm of class ClassChild2";
		c1.cAr.add(c2);
		Ar.add(c1);
	}

	class ClassChild1 {

		int PlnCd;
		int cArCt;
		ArrayList<ClassChild2> cAr;

		public ClassChild1() {
			cAr = new ArrayList<ClassChild2>();
		}
	}

	class ClassChild2 {
		String PlNm;
	}

	public static void main(String[] args) {
		XStream xstream = new XStream(new DomDriver());
		Root root = new Root();
		System.out.println(xstream.toXML(root));
	}
}

i removed the access modifiers in the field so i can access them directly without getters and setters (bad practice!) and xstream generate this xml-output:

<root.Root>
<ArCt>0</ArCt>
<Ar>
<root.Root_-ClassChild1>
<PlnCd>10</PlnCd>
<cArCt>20</cArCt>
<cAr>
<root.Root_-ClassChild2>
<PlNm>PlNm of class ClassChild2</PlNm>
<outer-class reference="../../../../.."/>
</root.Root_-ClassChild2>
</cAr>
<outer-class reference="../../.."/>
</root.Root_-ClassChild1>
</Ar>
</root.Root>

as you can see, also composition and aggregation is provided by xsteam. please note, you can have absolute class references instead of ../..