Grails IndexOutOfBoundsException - grails

Question

I have the following code in Grails:
public LibraryItem createLibraryItemWithValues(ProjectItem projectItem) {
def libraryitem = new LibraryItem ()
libraryitem.name = projectItem.name
libraryitem.itemtype = projectItem.itemtype.itemtype
libraryitem.description = projectItem.description
List<LibraryCategoryValue> libCatValues = new ArrayList<LibraryCategoryValue>();
for (def pcv : projectItem.categoryvalues) {
libCatValues.add(pcv.librarycategoryvalue);
}
if (libraryitem.id != null && !libraryitem.isAttached()) {
libraryitem.attach()
}
libCatValues.each{
it.addToLibraryitems(libraryitem)
}
return libraryitem.save()
}
The class LibraryCategoryValue
package ch.fhnw.accelerom.project.library
import ch.fhnw.accelerom.project.ItemType
import ch.fhnw.accelerom.project.TranslatableObject
class LibraryCategoryValue extends TranslatableObject {
SortedSet<LibraryItem> libraryitems
static belongsTo = [librarycategory:LibraryCategory]
static hasMany = [libraryitems: LibraryItem]
static constraints = {
}
}
My problem is, that I get the exception "IndexOutOfBoundsException" with the detailMessage "Index:1, Size 0" and suppressedExceptions "Collections$UnmodifiableRandomAccessList" with Value "size = 0" when I run this code in the service but there is no exception, when I run this code in the controller. The exception comes from the command it.addToLibraryitems(libraryitem), respektive, when I comment this line, than no exception occur. Can someone give me a hint, what the problem could be?
Thanks in advance.
Edit:
I now initialized libraryitems in the class with
SortedSet<LibraryItem> libraryitems = []
but now I get the following error when I start the application
ERROR context.GrailsContextLoader - Error initializing the application: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.InstantiationException: could not instantiate test objectch.fhnw.accelerom.project.library.LibraryCategoryValue
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.InstantiationException: could not instantiate test objectch.fhnw.accelerom.project.library.LibraryCategoryValue
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.InstantiationException: could not instantiate test objectch.fhnw.accelerom.project.library.LibraryCategoryValue
... 4 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.InstantiationException: could not instantiate test objectch.fhnw.accelerom.project.library.LibraryCategoryValue
... 4 more
Caused by: org.hibernate.InstantiationException: could not instantiate test objectch.fhnw.accelerom.project.library.LibraryCategoryValue
... 4 more
Caused by: java.lang.reflect.InvocationTargetException
... 4 more
Caused by: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '[]' with class 'java.util.ArrayList' to class 'java.util.SortedSet' due to: groovy.lang.GroovyRuntimeException: Could not find matching constructor for: java.util.SortedSet()
at ch.fhnw.accelerom.project.library.LibraryCategoryValue.<init>(LibraryCategoryValue.groovy:7)
... 4 more
Edit 2:
I also tried to initialize libraryitems with
SortedSet<LibraryItem> libraryitems = new TreeSet<LibraryItem>()
But then I'm back on the first exception "IndexOutOfBoundsException". I'm so wondering, why there is no problem, when this code is in the controller. What's the difference between a service and a controller in this case?

Answer 1

Try using a transactional service method:
import grails.transaction.Transactional
class LibraryService {
#Transactional
public LibraryItem createLibraryItemWithValues(ProjectItem projectItem) {
def libraryitem = new LibraryItem()
libraryitem.name = projectItem.name
libraryitem.itemtype = projectItem.itemtype.itemtype
libraryitem.description = projectItem.description
projectItem.categoryvalues*.librarycategoryvalue.each {
it.addToLibraryitems(libraryitem)
}
return libraryitem.save()
}
}
Since you're creating a new LibraryItem it's ID will always be null until you save it. In most cases you don't need to use attach(), so I removed all of that code.