Marshall Object List

[bsisson]

I'm trying to marshall a list containing objects into an XML string. I was able to marshall a single object into an XML string but am struggling on what is needed to do a list?

I am including an example using JBoss Tools Web Services. It will query the database and receive a back a list of WebCalendar objects. If I create a single object and marshall it will work. However, I need to marshall the list so that it creates multiple entries for each object in the marshalled XML. If you can advise I would appreciate it.

Here is an example code:

This is the class that will query the database which returns a list of WebPayCalendar objects I then try to marshall the list into an XML string:

@WebMethod
public String retrievePsWebPayCalendar()
{
try
{
/**************************************************************************
* The following example marshals an object class into an XML string which
* is returned to the caller. The object is an entity representing a
* row on the database.
**************************************************************************/
WebPayCalendarList selectCalendar = (WebPayCalendarList) Component.getInstance("webPayCalendarList");
// Retrieve the entire list of web pay calendar dates
List pc = selectCalendar.getResultList();

// For a test retrieve only the first web calendar date object
WebPayCalendar wpc = pc.get(0);

// Marshal the calendar information into an XML string and return it
JAXBContext context = JAXBContext.newInstance(WebPayCalendar.class);
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(pc, System.out);

return result.getWriter().toString();

}
catch (Exception e)
{
return "Error: " + e.getMessage();
}

}

This is the object Class:
package org.domain.PSWebService.entity;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.UniqueConstraint;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;

import org.hibernate.validator.Length;

@Entity
@Table(name="WEB_PAY_CALENDAR", uniqueConstraints = {@UniqueConstraint(columnNames={"RUN_ID"})})
@XmlRootElement
public class WebPayCalendar implements Serializable
{

//WEB_PAY_CALENDAR Data Columns
@Length(max=3)
private String payGroup;
@Id
@Length(max=10)
@Column(name="RUN_ID")
private String runId;
@Column(name="CHECK_DT")
private java.util.Date checkDt;
@Column(name="PAY_BEGIN_DT")
private java.util.Date payBeginDt;
@Column(name="PAY_END_DT")
private java.util.Date payEndDt;
@Length(max=1)
@Column(name="PAY_CONFIRM_RUN")
private String payConfirmRun;


public String getPayGroup()
{
return payGroup;
}
public void setPayGroup(String payGroup)
{
this.payGroup = payGroup;
}
public String getRunId()
{
return runId;
}
public void setRunId(String runId)
{
this.runId = runId;
}
public java.util.Date getCheckDt()
{
return checkDt;
}
public void setCheckDt(java.util.Date checkDt)
{
this.checkDt = checkDt;
}
public java.util.Date getPayBeginDt()
{
return payBeginDt;
}
public void setPayBeginDt(java.util.Date payBeginDt)
{
this.payBeginDt = payBeginDt;
}
public java.util.Date getPayEndDt()
{
return payEndDt;
}
public void setPayEndDt(java.util.Date payEndDt)
{
this.payEndDt = payEndDt;
}
public String getPayConfirmRun()
{
return payConfirmRun;
}
public void setPayConfirmRun(String payConfirmRun)
{
this.payConfirmRun = payConfirmRun;
}

}

[bsisson]

I was able to figure out and here is sample code that produces a marshalled XML output string from objects and object lists.

Here is the testing Class (Used to create the object instances and then marshall them):

package org.xmlmarshalling2.com;

import java.util.List;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;

public class RunItemTest
{
public static void main(String[] args)
{
System.out.println("test");

Items todo = new Items();

todo.setTitle("Beginning!!!");

List items = todo.getItem();

Item i1 = new Item();
i1.setId("001");
i1.setName("Dog");
i1.setPrice("$3.99");

items.add(i1);

Item i2 = new Item();
i2.setId("002");
i2.setName("Cat");
i2.setPrice("$2.99");

items.add(i2);

Item i3 = new Item();
i3.setId("003");
i3.setName("Fish");
i3.setPrice("$1.99");

items.add(i3);

try
{
JAXBContext context = JAXBContext.newInstance(Items.class);
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(todo, System.out);
}
catch (Exception e)
{
System.out.println("Error: " + e.getMessage());

}

}

}

Here is a base class (this class contains a reference to the object list):

package org.xmlmarshalling2.com;

import java.util.*;
import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
"title", "item"
})
@XmlRootElement(name = "Items")
public class Items {

protected String title;

@XmlElement(name = "Item")
protected List item;

public List getItem()
{
if (item == null) {
item = new ArrayList();
}
return this.item;
}

public String getTitle()
{
return title;
}

public void setTitle(String title)
{
this.title = title;
}


}


Here is the class that the object list is created from:

package org.xmlmarshalling2.com;

import javax.xml.bind.annotation.*;
import javax.xml.bind.annotation.adapters.*;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
"name",
"price"
})
@XmlRootElement(name = "Item")
public class Item {

@XmlElement(name = "Name")
protected String name;
@XmlElement(name = "Price")
protected String price;
@XmlAttribute(required = true)
@XmlJavaTypeAdapter(CollapsedStringAdapter.class)
protected String id;

public String getName() {
return name;
}

public void setName(String value) {
this.name = value;
}

public String getPrice() {
return price;
}

public void setPrice(String value) {
this.price = value;
}

public String getId() {
return id;
}

public void setId(String value) {
this.id = value;
}
}