Re: [eclipselink-users] MOXy JAXB Eclipselink Workbench

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Re: [eclipselink-users] MOXy JAXB Eclipselink Workbench - wrong unmarshall

From: David McCann <david.mccann@xxxxxxxxxx>
Date: Wed, 29 Dec 2010 10:41:33 -0500
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Hi Adriano,

This appears to be a valid MOXy bug. There is an issue with our Self Mapping support (the creditor field is mapped to '.') where both Creditor and PaymentInf both have an xml path ('field name' in the workbench mapping file) ending in 'id/text()'.

I have opened an EclipseLink bug to track this issue: https://bugs.eclipse.org/bugs/show_bug.cgi?id=333306

In the meantime you can try mapping one of the 'id' fields to a different XPath as you suggested, such as 'pid/text()' for the PaymentInf 'id' field, or map one of them to an attribute, such as 'CreditorFrstName/@id' for the Creditor 'id' field.

Regards,
Dave

On 29/12/2010 4:12 AM, Adriano Daniele wrote:

MOXy JAXB Eclipselink Workbench - wrong unmarshall
Hello,
can you please help me to understand what's wrong in my simple unmarshall example?

Libraries used:
- jdk 1.5.0_16
- EclipseLink 2.2.0
- javax.xml.stream_1.0.1
- javax.xml.bind_2.2.0

Xml file:
<PaymentInf>
        <id>pmtid</id>
        <PmtInf>
                <service>
                        <id>SEPA</id>
                </service>
                <amount>
                        <val>1</val>
                </amount>
                <date>2010-12-27</date>
        </PmtInf>
        <CreditorFrstName>
                <cd>myfrstname</cd>
                <id>frstId</id>
        </CreditorFrstName>
        <CreditorLstName>
                <cd>mylastname</cd>
        </CreditorLstName>
</PaymentInf>

java classes (getter and setter are here hidden):
public class PaymentInf {
        private String id;
        private String service;
        private BigDecimal amount;
        private Date date;
        private Creditor creditor;
}

public class Creditor {
        private String firstName;
        private String lastName;
        private String id;
}

Test code:
JAXBContext context = JAXBContextFactory.createContext("payment", getClass().getClassLoader());
InputStream payment = getClass().getClassLoader().getResourceAsStream("payment.xml");
Unmarshaller unmarshaller = context.createUnmarshaller();
PaymentInf pmt = (PaymentInf) unmarshaller.unmarshal(payment);

It works properly only if i map all xml fields and only if <id> tag is not duplicated (i have to change service id tag to idserv and creditorFrstName id tag to idcred).

If i didn't map the <service> tag and <id> field is duplicated then:
- amount is null
- date is null
- id is null
- service is null
- creditor firstName is properly unmarshalled
- creditor lastName is properly unmarshalled
- creditor id is "frstIdfrstId" (duplicated)

If i didn't map the <service> tag and <id> field is not duplicated then:
- amount is null
- date is null
- id is properly unmarshalled
- service is null
- creditor firstName is properly unmarshalled
- creditor lastName is properly unmarshalled
- creditor id is is properly unmarshalled

What is wrong?

Thank you for your attention,
Daniele

p.s. Here the xml mapping generated by Eclipselink Workbench used in the test:
<?xml version="1.0" encoding="UTF-8"?>
<object-persistence xmlns="http://www.eclipse.org/eclipselink/xsds/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:eclipselink="http://www.eclipse.org/eclipselink/xsds/persistence" version="Eclipse Persistence Services - 2.1.2.v20101206-r8635">
   <name>payment</name>
   <class-mapping-descriptors>

      <class-mapping-descriptor xsi:type="xml-class-mapping-descriptor">
         <class>dto.PaymentInf</class>
         <alias>PaymentInf</alias>
         <events/>
         <querying/>
         <attribute-mappings>
            <attribute-mapping xsi:type="xml-composite-object-mapping">
               <attribute-name>creditor</attribute-name>
               <reference-class>dto.Creditor</reference-class>
               <field name="." xsi:type="node"/>
            </attribute-mapping>
            <attribute-mapping xsi:type="xml-direct-mapping">
               <attribute-name>id</attribute-name>
               <field name="id/text()" xsi:type="node"/>
               <null-policy xsi:type="null-policy">
                  <empty-node-represents-null>true</empty-node-represents-null>
                  <null-representation-for-xml>ABSENT_NODE</null-representation-for-xml>
               </null-policy>
            </attribute-mapping>
            <attribute-mapping xsi:type="xml-direct-mapping">
               <attribute-name>service</attribute-name>
               <field name="PmtInf/service/id/text()" xsi:type="node"/>
               <null-policy xsi:type="null-policy">
                  <empty-node-represents-null>true</empty-node-represents-null>
                  <null-representation-for-xml>ABSENT_NODE</null-representation-for-xml>
               </null-policy>
            </attribute-mapping>
            <attribute-mapping xsi:type="xml-direct-mapping">
               <attribute-name>amount</attribute-name>
               <field name="PmtInf/amount/val/text()" xsi:type="node"/>
               <null-policy xsi:type="null-policy">
                  <empty-node-represents-null>true</empty-node-represents-null>
                  <null-representation-for-xml>ABSENT_NODE</null-representation-for-xml>
               </null-policy>
            </attribute-mapping>
            <attribute-mapping xsi:type="xml-direct-mapping">
               <attribute-name>date</attribute-name>
               <field name="PmtInf/date/text()" xsi:type="node">
                  <schema-type>{http://www.w3.org/2001/XMLSchema}date</schema-type>
               </field>
               <null-policy xsi:type="null-policy">
                  <empty-node-represents-null>true</empty-node-represents-null>
                  <null-representation-for-xml>ABSENT_NODE</null-representation-for-xml>
               </null-policy>
            </attribute-mapping>
         </attribute-mappings>
         <descriptor-type>aggregate</descriptor-type>
         <instantiation/>
         <copying xsi:type="instantiation-copy-policy"/>
         <default-root-element>PaymentInf</default-root-element>
         <default-root-element-field name="PaymentInf"/>
      </class-mapping-descriptor>

      <class-mapping-descriptor xsi:type="xml-class-mapping-descriptor">
         <class>dto.Creditor</class>
         <alias>Creditor</alias>
         <events/>
         <querying/>
         <attribute-mappings>
            <attribute-mapping xsi:type="xml-direct-mapping">
               <attribute-name>firstName</attribute-name>
               <field name="CreditorFrstName/cd/text()" xsi:type="node"/>
               <null-policy xsi:type="null-policy">
                  <empty-node-represents-null>true</empty-node-represents-null>
                  <null-representation-for-xml>ABSENT_NODE</null-representation-for-xml>
               </null-policy>
            </attribute-mapping>
            <attribute-mapping xsi:type="xml-direct-mapping">
               <attribute-name>id</attribute-name>
               <field name="CreditorFrstName/id/text()" xsi:type="node"/>
               <null-policy xsi:type="null-policy">
                  <empty-node-represents-null>true</empty-node-represents-null>
                  <null-representation-for-xml>ABSENT_NODE</null-representation-for-xml>
               </null-policy>
            </attribute-mapping>
            <attribute-mapping xsi:type="xml-direct-mapping">
               <attribute-name>lastName</attribute-name>
               <field name="CreditorLstName/cd/text()" xsi:type="node"/>
               <null-policy xsi:type="null-policy">
                  <empty-node-represents-null>true</empty-node-represents-null>
                  <null-representation-for-xml>ABSENT_NODE</null-representation-for-xml>
               </null-policy>
            </attribute-mapping>
         </attribute-mappings>
         <descriptor-type>aggregate</descriptor-type>
         <instantiation/>
         <copying xsi:type="instantiation-copy-policy"/>
         <should-preserve-document>true</should-preserve-document>
      </class-mapping-descriptor>

   </class-mapping-descriptors>
   <login xsi:type="xml-login">
      <platform-class>org.eclipse.persistence.oxm.platform.SAXPlatform</platform-class>
      <user-name></user-name>
   </login>
</object-persistence>

Here is session.xml:
<?xml version="1.0" encoding="UTF-8"?>
<sessions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" version="2.1.2">
   <session xsi:type="database-session">
      <name>payment</name>
      <event-listener-classes/>
      <logging xsi:type="eclipselink-log"/>
      <primary-project xsi:type="xml">mapping.xml</primary-project>
      <login xsi:type="xml-login">
         <platform-class>org.eclipse.persistence.oxm.platform.SAXPlatform</platform-class>
         <document-preservation-policy xsi:type="no-document-preservation-policy">
            <node-ordering-policy xsi:type="append-new-elements-ordering-policy"/>
         </document-preservation-policy>
      </login>
   </session>
</sessions>
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  - From: Adriano Daniele

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