Customized itemreader throwing ReaderNotOpenException - spring-batch

Question

I have a customized item reader as shown below
class MyReader implements ItemReader<MyBean>, ItemStream{
SingleItemPeekableItemReader<MyBean> myBeanPeekableReader;
public SingleItemPeekableItemReader<MyBean> getMyBeanPeekableReader() {
return myBeanPeekableReader;
}
public void setMyBeanPeekableReader(
SingleItemPeekableItemReader<MyBean> myBeanPeekableReader) {
this.myBeanPeekableReader = myBeanPeekableReader;
}
#Resource
public void caller(ItemReader<MyBean> myJdbcReader){
myBeanPeekableReader.setDelegate(myJdbcReader);
}
#Override
public void close() throws ItemStreamException {
myBeanPeekableReader.close();
}
#Override
public void open(ExecutionContext arg0) throws ItemStreamException {
myBeanPeekableReader.open(arg0);
}
#Override
public void update(ExecutionContext arg0) throws ItemStreamException {
// TODO Auto-generated method stub
}
Class extending JdbcCursorItemReader:
import javax.annotation.Resource;
import javax.sql.DataSource;
import org.springframework.batch.item.database.JdbcCursorItemReader;
import org.springframework.jdbc.core.PreparedStatementSetter;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Component;
#Component("myJdbcReader")
public class MyJdbcReader extends JdbcCursorItemReader<MyBean> {
private String sql = "Select * from mytable";
MyJdbcReader(){
super.setSql(sql);
}
#Override
#Resource
public void setDataSource(DataSource dataSource){
super.setDataSource(dataSource);
}
#Override
#Resource
public void setRowMapper(RowMapper myRowMapper){
super.setRowMapper(myRowMapper);
}
#Override
#Resource
public void setPreparedStatementSetter(PreparedStatementSetter myPrepSetter){
super.setPreparedStatementSetter(myPrepSetter);
}
}
Even after implementing ItemStream it is throwing exception ReaderNotFound..can someone suggest where I am getting wrong.