NullPointerException in BeanWrapperFieldSetMapper

[sharikumar]

I am getting NullPointerException in BeanWrapperFieldSetMapper class while reading the flat file using Spring Batch. I here with given the details below. Please help me out of the Problem.

Caused by: java.lang.NullPointerException
	at org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper.findPropertyName(BeanWrapperFieldSetMapper.java:273)
	at org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper.findPropertyName(BeanWrapperFieldSetMapper.java:290)
	at org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper.getBeanProperties(BeanWrapperFieldSetMapper.java:260)
	at org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper.mapFieldSet(BeanWrapperFieldSetMapper.java:172)
	at org.springframework.batch.item.file.mapping.DefaultLineMapper.mapLine(DefaultLineMapper.java:46)
	... 31 more

Spring Batch Configuration for Reader

<beans:bean id="playerFileItemReader" 
class="org.springframework.batch.item.file.FlatFileItemReader">
<!--  <beans:property name="resource" 
value="classpath:input/player.csv" /> -->
<beans:property name="resource" value="file:c:\data\input\player.csv" />		
<beans:property name="lineMapper">
<beans:bean 
class="org.springframework.batch.item.file.mapping.DefaultLineMapper">	
<beans:property name="lineTokenizer">				
<beans:bean 
class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
<beans:property name="delimiter" value=","/>
<beans:property name="names" 
value="ID,lastName,firstName,position,CareerPeriod.debutYear,CareerPeriod.finalYear" />
</beans:bean>
</beans:property>
<beans:property name="fieldSetMapper">
<beans:bean class="org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper">
<beans:property name="targetType" value="com.ecomputercoach.file.Player"/>
</beans:bean>
</beans:property>
</beans:bean>
</beans:property>
</beans:bean>

Player.java

public class Player implements Serializable 
{

	private String id; 
	private String lastName; 
	private String firstName; 
	private String position;
	private CareerPeriod careerPeriod;
	
	@SuppressWarnings("unused")
	private String fullName;
	private double careerLength;	
 
	public String getId() {
		return id;
	}
	public String getLastName() {
		return lastName;
	}
	public String getFirstName() {
		return firstName;
	}
	public String getPosition() {
		return position;
	}
 
	public void setId(String id) {
		this.id = id;
	}
	public void setLastName(String lastName) {
		this.lastName = lastName;
	}
	public void setFirstName(String firstName) {
		this.firstName = firstName;
	}
	public void setPosition(String position) {
		this.position = position;
	}
 
	public String getFullName() {
		return this.firstName+" "+this.lastName;
	}	
 
	public void setFullName(String fullName) {
		this.fullName = fullName;
	}
	public double getCareerLength() {
		return careerLength;
	}
	
	public void setCareerLength(double careerLength) {
		this.careerLength = careerPeriod.getFinalYear() - careerPeriod.getDebutYear();
	}
	
	public CareerPeriod getCareerPeriod() {
		return careerPeriod;
	}
	public void setCareerPeriod(CareerPeriod careerPeriod) {
		this.careerPeriod = careerPeriod;
	}		
}

CareerPeriod.java

public class CareerPeriod implements Serializable {
	private int debutYear; 
	private int finalYear;
	
	public int getDebutYear() {
		return debutYear;
	}
	public void setDebutYear(int debutYear) {
		this.debutYear = debutYear;
	}
	public int getFinalYear() {
		return finalYear;
	}
	public void setFinalYear(int finalYear) {
		this.finalYear = finalYear;
	}
}

[Dave Syer]

The line numbers in the stack trace don't match the most recent version. I suggest you upgrade and try again?

[sharikumar]

Thanks Dave. previously i used Spring Batch 2.0.4 version. It is working fine with the latest version.