Spring Batch MultiReader - spring

Question

I am trying to for multi-read using spring batch approach in which i have to get result from multiple queries and need to do some processing withe result and write them into file. I tried for a sample code but its giving me a error. I believe i have almost there but something i am missing due to my limited knowledge in spring batch
Below is my Code
MultipleReader-batch-context.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:batch="http://www.springframework.org/schema/batch" 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-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
<import resource="classpath:context-datasource.xml" />
<!-- JobRepository and JobLauncher are configuration/setup classes -->
<bean id="jobRepository"
class="org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean" />
<bean id="jobLauncher"
class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property name="jobRepository" ref="jobRepository" />
</bean>
<bean id="transactionManager"
class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />
<bean id= "result1" class="org.springframework.batch.item.database.JdbcCursorItemReader" >
<property name="dataSource" ref="dataSource" />
<property name="sql" value="SELECT * from SNG_CORE.LOOK_UP" />
<property name="rowMapper"> <bean class="com.websystique.springbatch.ExamResultRowMapper" />
</property>
</bean>
<bean id ="result2" class="org.springframework.batch.item.database.JdbcCursorItemReader" >
<property name="dataSource" ref="dataSource" />
<property name="sql" value= "SELECT * from SNG_CORE.LOOK_UP_2"/>
<property name="rowMapper"> <bean class="com.websystique.springbatch.ExamResultRowMapper" />
</property>
</bean>
<bean id="customItemReader" class="com.websystique.springbatch.MyCustomReader" scope="step">
<property name="result1" ref="result1" />
<property name="result2" ref="result2" />
</bean>
<job id="MultipleReaderJob" xmlns="http://www.springframework.org/schema/batch">
<step id="step1">
<tasklet>
<chunk reader="customItemReader" writer="flatFileItemWriter"
commit-interval="1" />
</tasklet>
</step>
<property name="resource" value="file:csv/examResult.txt" />
<property name="lineAggregator">
<!-- An Aggregator which converts an object into delimited list of strings -->
<bean
class="org.springframework.batch.item.file.transform.DelimitedLineAggregator">
<property name="delimiter" value="|" />
<property name="fieldExtractor">
<!-- Extractor which returns the value of beans property through reflection -->
<bean
class="org.springframework.batch.item.file.transform.BeanWrapperFieldExtractor">
<property name="names" value="studentName, studentName1, studentName2" />
</bean>
</property>
</bean>
</property>
</bean>
====
ExamResultRowMapper
public class ExamResultRowMapper implements RowMapper<ExamResult>{
#Override
public ExamResult mapRow(ResultSet rs, int rowNum) throws SQLException {
ExamResult result = new ExamResult();
result.setStudentName(rs.getString("I_LKUP"));
result.setStudentName1(rs.getString("C_LKUP_TYP"));
result.setStudentName2(rs.getString("C_LKUP_KEY"));
return result;
}
==================
Custom Reader
public class MyCustomReader implements ItemReader<ExamResult> {
ItemReader<ExamResult> result1;
ItemReader<ExamResult> result2;
#Override
public ExamResult read()
throws Exception, UnexpectedJobExecutionException, ParseException, NonTransientResourceException {
ExamResult application1 = result1.read();
ExamResult application2 = result2.read();
/***
* I want to perform some operation with two result set
* and passs the final data to writter
* /
ExamResult summary = new ExamResult();
return summary;
}
}
===Exam result===
public class ExamResult {
private String studentName;
private String studentName1;
private String studentName2;
public String getStudentName() {
return studentName;
}
public void setStudentName(String studentName) {
this.studentName = studentName;
}
public String getStudentName1() {
return studentName1;
}
public void setStudentName1(String studentName1) {
this.studentName1 = studentName1;
}
public String getStudentName2() {
return studentName2;
}
public void setStudentName2(String studentName2) {
this.studentName2 = studentName2;
}
#Override
public String toString() {
return " [studentName=" + studentName + ", dob=" + studentName1 + ", Std=" + studentName2 + "]";
}
}
====================================================================
When ever i execute this i am getting
Encountered an error executing step step1 in job MultipleReaderJob
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.customItemReader' defined in class path resource [MultipleReader-batch-context.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'result1' of bean class [com.websystique.springbatch.MyCustomReader]: Bean property 'result1' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
Note : All works good if i run my job to read with 1 result set .
<job id="MultipleReaderJob" xmlns="http://www.springframework.org/schema/batch">
<step id="step1">
<tasklet>
<chunk reader="result1" writer="flatFileItemWriter"
commit-interval="1" />
</tasklet>
</step>