Read from multiple XMLs and write in one XML in Spring batch

Question

I used JAXB xjc tool to generate java classes from my multiple xsd files (I used an online tool to generate xsd files from my xml files).

My problem is that I don't know how to configure my context.xml to make it read all the classes (and xmls) given AND generate only one final big xml file.

Here is my context.xml:

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:batch="http://www.springframework.org/schema/batch" xmlns:task="http://www.springframework.org/schema/task"
xmlns:util="http://www.springframework.org/schema/util" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/batch
    http://www.springframework.org/schema/batch/spring-batch-2.2.xsd
    http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    http://www.springframework.org/schema/util 
    http://www.springframework.org/schema/util/spring-util-3.2.xsd">
<import resource="../config/context.xml" />
<batch:job id="bghJob" parent="simpleJob">
    <batch:step id="step1">
        <batch:tasklet>
            <batch:chunk reader="multiResourceReader" writer="xmlItemWriter"
                commit-interval="1" />
        </batch:tasklet>
    </batch:step>
</batch:job>

<bean id="multiResourceReader"
    class=" org.springframework.batch.item.file.MultiResourceItemReader">
    <property name="resources" value="classpath:xml/*.xml" />
    <property name="delegate" ref="xmlItemReader" />
</bean>

<bean id="xmlItemReader" class="org.springframework.batch.item.xml.StaxEventItemReader">
    <property name="unmarshaller" ref="invoiceUnMarshaller" />
    <property name="fragmentRootElementName" value="DocumentType" />
</bean>

<bean id="invoiceUnMarshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
    <property name="classesToBeBound">
        <value>com.xxx.generatedByJaxb.inv.DocumentType</value>
    </property>
</bean>

<bean id="xmlItemWriter" class="org.springframework.batch.item.xml.StaxEventItemWriter">
    <property name="resource" value="file:xml/outputs/Facture.xml" />
    <property name="marshaller" ref="invoiceMarshaller" />
    <property name="rootTagName" value="Facture" />
</bean>

<bean id="invoiceMarshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
    <property name="classesToBeBound">
        <value>com.xxx.generatedByJaxb.inv.DocumentType</value>
    </property>
</bean>

It seems like I can only read one class (for example com.xxx.generatedByJaxb.inv.DocumentType) and I have to specify the root tag but no one of my generated java classes has the annotation XmlRootElement

How can I configure my job to achieve my goal please?

Thank you.

Answer 1

Just use the contextPath property:

<property name="contextPath"
   value="com.xxx.generatedByJaxb.inv:com.yyy.generatedByJaxb.inv"/>

This is a list of relevant packages, : -separated.

Check also other properties, they might be handy.