Given this XSD (easypo.xsd):
<xs:schema
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:po="http://openuri.org/easypo"
targetNamespace="http://openuri.org/easypo"
elementFormDefault="qualified">
<xs:element name="purchase-order">
<xs:complexType>
<xs:sequence>
<xs:element name="customer" type="po:customer"/>
<xs:element name="date" type="xs:dateTime"/>
<xs:element name="line-item" type="po:line-item" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="shipper" type="po:shipper" minOccurs="0" maxOccurs="1"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:complexType name="customer">
<xs:sequence>
<xs:element name="name" type="xs:string"/>
<xs:element name="address" type="xs:string"/>
</xs:sequence>
<xs:attribute name="age" type="xs:int"/>
<xs:attribute name="moo" type="xs:int" default="100"/>
<xs:attribute name="poo" type="xs:int" fixed="200"/>
</xs:complexType>
<xs:complexType name="line-item">
<xs:sequence>
<xs:element name="description" type="xs:string"/>
<xs:element name="per-unit-ounces" type="xs:decimal"/>
<xs:element name="price" type="xs:decimal"/>
<xs:element name="quantity" type="xs:integer"/>
</xs:sequence>
</xs:complexType>
<xs:complexType name="shipper">
<xs:sequence>
<xs:element name="name" type="xs:string"/>
<xs:element name="per-ounce-rate" type="xs:decimal"/>
</xs:sequence>
</xs:complexType>
</xs:schema>
... and this document, which should be valid according to the easypo.xsd schema:
<purchase-order xmlns="http://openuri.org/easypo">
<customer>
<name>Gladys Kravitz</name>
<address>Anytown, PA</address>
</customer>
<date>2003-01-07T14:16:00-05:00</date>
<line-item>
<description>Burnham's Celestial Handbook, Vol 1</description>
<per-unit-ounces>5</per-unit-ounces>
<price>21.79</price>
<quantity>2</quantity>
</line-item>
<line-item>
<description>Burnham's Celestial Handbook, Vol 2</description>
<per-unit-ounces>5</per-unit-ounces>
<price>19.89</price>
<quantity>2</quantity>
</line-item>
<shipper>
<name>ZipShip</name>
<per-ounce-rate>0.74</per-ounce-rate>
</shipper>
</purchase-order>
... generate a Java JAR file of code to bind the above document like so: scomp -out tutorials\gettingstarted\lib\easypo.jar schemas\easypo\easypo.xsd
... then we can write the following Java to update a PO:
import java.io.*;
import java.math.*;
import org.apache.xmlbeans.*;
import org.apache.easypo.*;
public class POUpdater
{
public static void main(String[] args)
{
File poXmlFile = new File(args[0]);
String updatedPoXml = addLineItem(poXmlFile, args[1], args[2],
args[3], args[4]);
System.out.println(updatedPoXml);
}
private static String addLineItem(File purchaseOrder, String itemDescription,
String perUnitOuncesString,
String itemPriceString, String itemQuantityString)
{
PurchaseOrderDocument poDoc = null;
try
{
// Bind the incoming XML to an XMLBeans type.
poDoc = PurchaseOrderDocument.Factory.parse(purchaseOrder);
} catch (XmlException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
// Convert incoming data to types that can be used in accessors.
BigDecimal perUnitOunces = new BigDecimal(perUnitOuncesString);
BigDecimal itemPrice = new BigDecimal(itemPriceString);
BigInteger itemQuantity = new BigInteger(itemQuantityString);
// Add the new <line-item> element.
LineItem newItem = poDoc.getPurchaseOrder().addNewLineItem();
newItem.setDescription(itemDescription);
newItem.setPerUnitOunces(perUnitOunces);
newItem.setPrice(itemPrice);
newItem.setQuantity(itemQuantity);
return poDoc.toString();
}
}
Last modified 19 May 2023