Is there a java API to generate xml with an inline schema definition

[moin roy]

want to generate the xml file that holds its schema as well as the xml data contain using java,as per my knowledge it is possible in C# .NET.Is it possible in java???

My XML file should be look like as given below.

<transaction>
  <xs:schema id="transaction" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
    <xs:element name="transaction" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded">
          <xs:element name="id">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="in" type="xs:string" minOccurs="0" />
                <xs:element name="sn" type="xs:string" minOccurs="0" />
                <xs:element name="book" type="xs:string" minOccurs="0" />
                <xs:element name="author" type="xs:string" minOccurs="0" />
               </xs:sequence>
            </xs:complexType>
          </xs:element>
          <xs:element name="data">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="dateTime" type="xs:dateTime" minOccurs="0" />
                <xs:element name="key" type="xs:string" minOccurs="0" />
              </xs:sequence>
            </xs:complexType>
          </xs:element>
          <xs:element name="productData">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="dateTime" type="xs:dateTime" minOccurs="0" />
                <xs:element name="key" type="xs:string" minOccurs="0" />
              </xs:sequence>
            </xs:complexType>
          </xs:element>
        </xs:choice>
      </xs:complexType>
    </xs:element>
  </xs:schema>
  <id>
    <in>computer</in>
    <sn>1234567</sn>
    <book>JAVA</book>
    <author>klen</author>
  </id>
  <data>
    <dateTime>2011-06-24T17:08:36.3727674+05:30</dateTime>
    <key>Err</key>
  </data>
</transaction>

In my given example my xml file contain data as well as schema I need to generate this type of file from schema using java.

[Paul Clapham]

The example you posted is XML. So any code, Java or otherwise, which can produce XML can produce that XML. The only requirement is that the code must be namespace-compliant, which all of the XML processing classes in the standard Java API are.

[moin roy]

Paul Clapham wrote:The example you posted is XML. So any code, Java or otherwise, which can produce XML can produce that XML. The only requirement is that the code must be namespace-compliant, which all of the XML processing classes in the standard Java API are.

I try to do that using jaxb and main code part is looking like

Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
		jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,true);
                jaxbMarshaller.setProperty(Marshaller.JAXB_FRAGMENT,true);
		jaxbMarshaller.marshal(transaction, file);
		jaxbMarshaller.marshal(transaction, System.out);

but it will generate only

<transaction>
  <id>
    <in>computer</in>
    <sn>1234567</sn>
    <book>JAVA</book>
    <author>klen</author>
  </id>
  <data>
    <dateTime>2011-06-24T17:08:36.3727674+05:30</dateTime>
    <key>Err</key>
  </data>
</transaction>

this file did not hold the inline schema part how can I make it possible.

[William P O'Sullivan]

dom4j is your friend:

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

public class XMLTest {
	
	public static void main(String[] args) {
		
		Element lastElement = null;
		
		XMLWriter writer = null;
		BufferedOutputStream bos = null;
		Document xmldoc = DocumentHelper.createDocument();
		Element transactionElement = xmldoc.addElement("transaction");
		xmldoc.setRootElement(transactionElement);
		
		Element schemaElement = transactionElement.addElement("schema");		
		schemaElement.addNamespace("xs","http://www.w3.org/2001/XMLSchema");
		schemaElement.addNamespace("msdata","urn:schemas-microsoft-com:xml-msdata");		

		schemaElement.addAttribute("id","transaction");
		
		Element elementElement = schemaElement.addElement("xs:element");
		elementElement.addAttribute("name","transaction");
		elementElement.addAttribute("msdata:IsDataSet","true");
		elementElement.addAttribute("msdata:UseCurrentLocale","true");
		
		lastElement = elementElement.addElement("xs:complexType");
		lastElement = lastElement.addElement("xs:choice");
		lastElement.addAttribute("minOccurs","0");
		lastElement.addAttribute("maxOccurs","unbounded");		
		
	   	try {
			bos = new BufferedOutputStream(new FileOutputStream("c:\\tmp\\test.xml"));
			OutputFormat format = OutputFormat.createPrettyPrint();
			writer  = new XMLWriter( bos, format );
			writer.write( xmldoc );
			writer.flush();

	    } catch (Exception up) {
			// TODO Auto-generated catch block
			up.printStackTrace();
		}
		
	}
		
}

produces:

<?xml version="1.0" encoding="UTF-8"?>

<transaction>
  <schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" id="transaction">
    <xs:element name="transaction" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded"/>
      </xs:complexType>
    </xs:element>
  </schema>
</transaction>

Write a helper that produces the inline schema, then add the Marshaled XML data after </xs:schema>

BTW: I have only scratched the power of dom4j here, I believe there are many helper methods to create Entities, ComplexTypes etc.. I was lazy and it's Friday!


Pat.

[Paul Clapham]

I get the feeling that Arjun is expecting something else to generate the Schema XML, although so far he hasn't said that.

[moin roy]

William P O'Sullivan wrote:dom4j is your friend:

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

public class XMLTest {
	
	public static void main(String[] args) {
		
		Element lastElement = null;
		
		XMLWriter writer = null;
		BufferedOutputStream bos = null;
		Document xmldoc = DocumentHelper.createDocument();
		Element transactionElement = xmldoc.addElement("transaction");
		xmldoc.setRootElement(transactionElement);
		
		Element schemaElement = transactionElement.addElement("schema");		
		schemaElement.addNamespace("xs","http://www.w3.org/2001/XMLSchema");
		schemaElement.addNamespace("msdata","urn:schemas-microsoft-com:xml-msdata");		

		schemaElement.addAttribute("id","transaction");
		
		Element elementElement = schemaElement.addElement("xs:element");
		elementElement.addAttribute("name","transaction");
		elementElement.addAttribute("msdata:IsDataSet","true");
		elementElement.addAttribute("msdata:UseCurrentLocale","true");
		
		lastElement = elementElement.addElement("xs:complexType");
		lastElement = lastElement.addElement("xs:choice");
		lastElement.addAttribute("minOccurs","0");
		lastElement.addAttribute("maxOccurs","unbounded");		
		
	   	try {
			bos = new BufferedOutputStream(new FileOutputStream("c:\\tmp\\test.xml"));
			OutputFormat format = OutputFormat.createPrettyPrint();
			writer  = new XMLWriter( bos, format );
			writer.write( xmldoc );
			writer.flush();

	    } catch (Exception up) {
			// TODO Auto-generated catch block
			up.printStackTrace();
		}
		
	}
		
}

produces:

<?xml version="1.0" encoding="UTF-8"?>

<transaction>
  <schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" id="transaction">
    <xs:element name="transaction" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded"/>
      </xs:complexType>
    </xs:element>
  </schema>
</transaction>

Write a helper that produces the inline schema, then add the Marshaled XML data after </xs:schema>

BTW: I have only scratched the power of dom4j here, I believe there are many helper methods to create Entities, ComplexTypes etc.. I was lazy and it's Friday!


Pat.

But how can I add this jaxb generated xml file under transaction after inline schema.Actually I am new in Java if you give some code snips it will be help full for me and easy to understand

[William P O'Sullivan]

Your marshalling an object named "transaction", so Jaxb assumes that is the xml document root element.

You could extend a base (superClass) object that contains all the inline schema as an attribute and have printed out as well.

Since it is Friday, and it's almost time to hit the bar, I tweaked my program a bit.
Some of the coding conventions here are not to be taken literally! I am really sick of getters and setters these days! ;)

After:

	public static void main(String[] args) {

Add:

		// Assume transaction Object looks something like this
		class Transaction {
			class Id {
				public String in;
				public String sn;
				public String book;
				public String author;
			}
			class Data {
				public String dateTime;
				public String key;
			}
			public Id id = new Id();
			public Data data = new Data();
		};
		// Set up some test data
		Transaction transaction = new Transaction();
		transaction.id.in = "computer";
		transaction.id.sn = "1234567";
		transaction.id.book = "JAVA";
		transaction.id.author = "klen";
		transaction.data.dateTime = "2011-06-24T17:08:36.3727674+05:30";
		transaction.data.key = "Err";

And After:

		lastElement.addAttribute("maxOccurs","unbounded");		

Add:

		
		// Iterate here over a collection of transactions
		// Id
		Element idElement = transactionElement.addElement("id");
		idElement.addElement("in").setText(transaction.id.in);
		idElement.addElement("sn").setText(transaction.id.sn);
		idElement.addElement("book").setText(transaction.id.book);
		idElement.addElement("author").setText(transaction.id.author);
		// Data
		Element dataElement = transactionElement.addElement("data");
		dataElement.addElement("dateTime").setText(transaction.data.dateTime);
		dataElement.addElement("key").setText(transaction.data.key);

This produces:

<?xml version="1.0" encoding="UTF-8"?>

<transaction>
  <schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" id="transaction">
    <xs:element name="transaction" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded"/>
      </xs:complexType>
    </xs:element>
  </schema>
  <id>
    <in>computer</in>
    <sn>1234567</sn>
    <book>JAVA</book>
    <author>klen</author>
  </id>
  <data>
    <dateTime>2011-06-24T17:08:36.3727674+05:30</dateTime>
    <key>Err</key>
  </data>
</transaction>

which is very very close to what you want to accomplish (I believe).

The key here is the line is "transactionElement.add". Since the XML is being built, you can add anything (within reason here), even other XML!
Your problem is that jaxb is adding <transaction> as the root.

Pat.

[moin roy]

William P O'Sullivan wrote:Your marshalling an object named "transaction", so Jaxb assumes that is the xml document root element.

You could extend a base (superClass) object that contains all the inline schema as an attribute and have printed out as well.

Since it is Friday, and it's almost time to hit the bar, I tweaked my program a bit.
Some of the coding conventions here are not to be taken literally! I am really sick of getters and setters these days! ;)

After:

	public static void main(String[] args) {

Add:

		// Assume transaction Object looks something like this
		class Transaction {
			class Id {
				public String in;
				public String sn;
				public String book;
				public String author;
			}
			class Data {
				public String dateTime;
				public String key;
			}
			public Id id = new Id();
			public Data data = new Data();
		};
		// Set up some test data
		Transaction transaction = new Transaction();
		transaction.id.in = "computer";
		transaction.id.sn = "1234567";
		transaction.id.book = "JAVA";
		transaction.id.author = "klen";
		transaction.data.dateTime = "2011-06-24T17:08:36.3727674+05:30";
		transaction.data.key = "Err";

And After:

		lastElement.addAttribute("maxOccurs","unbounded");		

Add:

		
		// Iterate here over a collection of transactions
		// Id
		Element idElement = transactionElement.addElement("id");
		idElement.addElement("in").setText(transaction.id.in);
		idElement.addElement("sn").setText(transaction.id.sn);
		idElement.addElement("book").setText(transaction.id.book);
		idElement.addElement("author").setText(transaction.id.author);
		// Data
		Element dataElement = transactionElement.addElement("data");
		dataElement.addElement("dateTime").setText(transaction.data.dateTime);
		dataElement.addElement("key").setText(transaction.data.key);

This produces:

<?xml version="1.0" encoding="UTF-8"?>

<transaction>
  <schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" id="transaction">
    <xs:element name="transaction" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded"/>
      </xs:complexType>
    </xs:element>
  </schema>
  <id>
    <in>computer</in>
    <sn>1234567</sn>
    <book>JAVA</book>
    <author>klen</author>
  </id>
  <data>
    <dateTime>2011-06-24T17:08:36.3727674+05:30</dateTime>
    <key>Err</key>
  </data>
</transaction>

which is very very close to what you want to accomplish (I believe).

The key here is the line is "transactionElement.add". Since the XML is being built, you can add anything (within reason here), even other XML!
Your problem is that jaxb is adding <transaction> as the root.

Pat.

Thanks for your help many many thanks to you.Can you tell me that with out dom4j can I do it because I want do it using sun(oracle) provided API.Is there any API by which I can do it like stax or DOM. I heard about that stax is better than dom to xml write,so I want to use stax is it possible to set namespace and other thing.

I have another question is true that jaxb is only use to convert xml to xml schema(un marshaling) and xml schema to xml(marshaling) and if I need to write xml file then we need to use jaxb[DOM,STAX(stream based reading writing),SAX(stream only reading)] .

[moin roy]

arjun ray wrote:

William P O'Sullivan wrote:Your marshalling an object named "transaction", so Jaxb assumes that is the xml document root element.

You could extend a base (superClass) object that contains all the inline schema as an attribute and have printed out as well.

Since it is Friday, and it's almost time to hit the bar, I tweaked my program a bit.
Some of the coding conventions here are not to be taken literally! I am really sick of getters and setters these days! ;)

After:

	public static void main(String[] args) {

Add:

		// Assume transaction Object looks something like this
		class Transaction {
			class Id {
				public String in;
				public String sn;
				public String book;
				public String author;
			}
			class Data {
				public String dateTime;
				public String key;
			}
			public Id id = new Id();
			public Data data = new Data();
		};
		// Set up some test data
		Transaction transaction = new Transaction();
		transaction.id.in = "computer";
		transaction.id.sn = "1234567";
		transaction.id.book = "JAVA";
		transaction.id.author = "klen";
		transaction.data.dateTime = "2011-06-24T17:08:36.3727674+05:30";
		transaction.data.key = "Err";

And After:

		lastElement.addAttribute("maxOccurs","unbounded");		

Add:

		
		// Iterate here over a collection of transactions
		// Id
		Element idElement = transactionElement.addElement("id");
		idElement.addElement("in").setText(transaction.id.in);
		idElement.addElement("sn").setText(transaction.id.sn);
		idElement.addElement("book").setText(transaction.id.book);
		idElement.addElement("author").setText(transaction.id.author);
		// Data
		Element dataElement = transactionElement.addElement("data");
		dataElement.addElement("dateTime").setText(transaction.data.dateTime);
		dataElement.addElement("key").setText(transaction.data.key);

This produces:

<?xml version="1.0" encoding="UTF-8"?>

<transaction>
  <schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" id="transaction">
    <xs:element name="transaction" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded"/>
      </xs:complexType>
    </xs:element>
  </schema>
  <id>
    <in>computer</in>
    <sn>1234567</sn>
    <book>JAVA</book>
    <author>klen</author>
  </id>
  <data>
    <dateTime>2011-06-24T17:08:36.3727674+05:30</dateTime>
    <key>Err</key>
  </data>
</transaction>

which is very very close to what you want to accomplish (I believe).

The key here is the line is "transactionElement.add". Since the XML is being built, you can add anything (within reason here), even other XML!
Your problem is that jaxb is adding <transaction> as the root.

Pat.

Thanks for your help many many thanks to you.Can you tell me that with out dom4j can I do it because I want do it using sun(oracle) provided API.Is there any API by which I can do it like stax or DOM. I heard about that stax is better than dom to xml write,so I want to use stax is it possible to set namespace and other thing.

I have another question is true that jaxb is only use to convert xml to xml schema(un marshaling) and xml schema to xml(marshaling) and if I need to write xml file then we need to use jaxb[DOM,STAX(stream based reading writing),SAX(stream only reading)] .

I want to generate the total xml file with xml schema(inline Schema) using jaxb API is it possible? using jaxb can we generate xml with schema?As per your procedure you say that generate xml structure using jaxb and inline schema will generate using DOM model and add schema object(created using DOM) and xml data(generated using jaxb) using DOM.but is not possible to do the total thing using jaxb what is done by DOM object?

[moin roy]

I want to generate the total xml file with xml schema(inline Schema) using jaxb API is it possible? using jaxb can we generate xml with schema?As per your procedure you say that generate xml structure using jaxb and inline schema will generate using DOM model and add schema object(created using DOM) and xml data(generated using jaxb) using DOM.but is not possible to do the total thing using jaxb what is done by DOM object?