java - Spring injecting implementation bean -

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i have following snippet conf spring file:

<bean id="taskletstep" abstract="true" class="org.springframework.batch.core.step.tasklet.taskletstep">         <property name="jobrepository" ref="jobrepository"/>         <property name="transactionmanager" ref="transactionmanager"/>     </bean>      <bean id="hello" class="com.techavalanche.batch.printtasklet">         <property name="message" value="hello"/>     </bean>      <bean id="world" class="com.techavalanche.batch.printtasklet">         <property name="message" value=" world!"/>     </bean>      <bean id="mysimplejob" class="org.springframework.batch.core.job.simplejob">         <property name="name" value="mysimplejob" />         <property name="steps">             <list>                 <bean parent="taskletstep">                     <property name="tasklet" ref="hello"/>                 </bean>                  <bean parent="taskletstep">                     <property name="tasklet" ref="world"/>                 </bean>             </list>         </property>

to me not clear following bit:

<bean parent="taskletstep">                     <property name="tasklet" ref="hello"/>                 </bean>

taskletstep interface , not have property. code works fine, seems bean id "hello" gets injected. therefore asking, standard way config file inject bean implementation (id: hello) interface bean (id: taskletstep)?

it's tasklet step in spring batch job. doing fine. alternatively, can this:

<job id="mysimplejob">     <step id="step1">         <tasklet ref="hello"/>     </step>      <step id="step2">         <tasklet ref="world"/>     </step> </job>

here complete reference: http://docs.spring.io/spring-batch/reference/htmlsingle/


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