[Hibernate-issues] [Hibernate-JIRA] Commented: (HB-310) CharacterType.get(ResultSet rs, String name) on zero length String

[<leg...@at...>]

The following comment has been added to this issue:

     Author: Tim Schafer
    Created: Thu, 4 Sep 2003 5:48 PM
       Body:
Ok the reason that CharacterType is being used is that the
class being mapped to uses a char for that attribute
Duh!

I created a String attribute in the class to map to and all is well

But there does seems to be a bug here
I created a char column in the database
copied the varchar column to it
and mapped that to the char attribute

If that char column is blank it will trip up the same section
of CharacterType

Mapping a char column from a mysql table to a char attribute
does seem a legitimate use case.
And hibernate shouldn't blow up because that char column is blank

I'm not sure if the blank char should map to a null char
or a ' '
But I think ' ' would preserve the semantics in the case of Mysql
columns
whereas null would imply the column was NULL in the database

This bug's priority can be lowered as far as I'm concerned though
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View the issue:

  http://opensource.atlassian.com/projects/hibernate/secure/ViewIssue.jspa?key=HB-310


Here is an overview of the issue:
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        Key: HB-310
    Summary: CharacterType.get(ResultSet rs, String name) on zero length String
       Type: Bug

     Status: Unassigned
   Priority: Blocker

    Project: Hibernate2
 Components: 
             core
   Versions:
             2.0.2
             2.0.3

   Assignee: 
   Reporter: Tim Schafer

    Created: Thu, 4 Sep 2003 11:03 AM
    Updated: Thu, 4 Sep 2003 11:03 AM
Environment: Sun JDK 1.4.2
Mysql 4.0.13

Description:

The get method of CharacterType is calling
java.lang.String.charAt(0)
on a String instance that has zero length

This resulted rom trying to load a mapped object from
a Mysql 4.0.13 record that has a blank column






Sep 4, 2003 8:55:27 AM net.sf.hibernate.impl.IteratorImpl next
SEVERE: could not get next result
java.lang.StringIndexOutOfBoundsException: String index out of range: 0
	at java.lang.String.charAt(Unknown Source)
	at net.sf.hibernate.type.CharacterType.get(CharacterType.java:19)
	at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:59)
	at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:51)
	at net.sf.hibernate.type.ComponentType.nullSafeGet(ComponentType.java:139)
	at net.sf.hibernate.collection.CollectionPersister.readElement(CollectionPersister.java:377)
	at net.sf.hibernate.collection.Set.readFrom(Set.java:242)
	at net.sf.hibernate.loader.Loader.doFind(Loader.java:175)
	at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:602)
	at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:82)
	at net.sf.hibernate.impl.SessionImpl.initialize(SessionImpl.java:2897)
	at net.sf.hibernate.collection.PersistentCollection.getInitialValue(PersistentCollection.java:128)
	at net.sf.hibernate.type.PersistentCollectionType.getCollection(PersistentCollectionType.java:74)
	at net.sf.hibernate.type.PersistentCollectionType.resolveIdentifier(PersistentCollectionType.java:177)
	at net.sf.hibernate.impl.SessionImpl.initializeEntity(SessionImpl.java:1959)
	at net.sf.hibernate.loader.Loader.doFind(Loader.java:196)
	at net.sf.hibernate.loader.Loader.loadEntity(Loader.java:587)
	at net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:42)
	at net.sf.hibernate.persister.EntityPersister.load(EntityPersister.java:396)
	at net.sf.hibernate.impl.SessionImpl.doLoad(SessionImpl.java:1889)
	at net.sf.hibernate.impl.SessionImpl.doLoadByClass(SessionImpl.java:1757)
	at net.sf.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:1716)
	at net.sf.hibernate.type.ManyToOneType.resolveIdentifier(ManyToOneType.java:62)
	at net.sf.hibernate.type.EntityType.nullSafeGet(EntityType.java:109)
	at net.sf.hibernate.impl.IteratorImpl.postNext(IteratorImpl.java:57)
	at net.sf.hibernate.impl.IteratorImpl.next(IteratorImpl.java:70)
	at test.TestHibernate.main(TestHibernate.java:94)
java.lang.StringIndexOutOfBoundsException: String index out of range: 0
	at java.lang.String.charAt(Unknown Source)
	at net.sf.hibernate.type.CharacterType.get(CharacterType.java:19)
	at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:59)
	at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:51)
	at net.sf.hibernate.type.ComponentType.nullSafeGet(ComponentType.java:139)
	at net.sf.hibernate.collection.CollectionPersister.readElement(CollectionPersister.java:377)
	at net.sf.hibernate.collection.Set.readFrom(Set.java:242)
	at net.sf.hibernate.loader.Loader.doFind(Loader.java:175)
	at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:602)
	at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:82)
	at net.sf.hibernate.impl.SessionImpl.initialize(SessionImpl.java:2897)
	at net.sf.hibernate.collection.PersistentCollection.getInitialValue(PersistentCollection.java:128)
	at net.sf.hibernate.type.PersistentCollectionType.getCollection(PersistentCollectionType.java:74)
	at net.sf.hibernate.type.PersistentCollectionType.resolveIdentifier(PersistentCollectionType.java:177)
	at net.sf.hibernate.impl.SessionImpl.initializeEntity(SessionImpl.java:1959)
	at net.sf.hibernate.loader.Loader.doFind(Loader.java:196)
	at net.sf.hibernate.loader.Loader.loadEntity(Loader.java:587)
	at net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:42)
	at net.sf.hibernate.persister.EntityPersister.load(EntityPersister.java:396)
	at net.sf.hibernate.impl.SessionImpl.doLoad(SessionImpl.java:1889)
	at net.sf.hibernate.impl.SessionImpl.doLoadByClass(SessionImpl.java:1757)
	at net.sf.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:1716)
	at net.sf.hibernate.type.ManyToOneType.resolveIdentifier(ManyToOneType.java:62)
	at net.sf.hibernate.type.EntityType.nullSafeGet(EntityType.java:109)
	at net.sf.hibernate.impl.IteratorImpl.postNext(IteratorImpl.java:57)
	at net.sf.hibernate.impl.IteratorImpl.next(IteratorImpl.java:70)
	at test.TestHibernate.main(TestHibernate.java:94)
rethrown as net.sf.hibernate.LazyInitializationException: Hibernate lazy instantiation problem: String index out of range: 0
	at net.sf.hibernate.impl.IteratorImpl.next(IteratorImpl.java:81)
	at test.TestHibernate.main(TestHibernate.java:94)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: 0
	at java.lang.String.charAt(Unknown Source)
	at net.sf.hibernate.type.CharacterType.get(CharacterType.java:19)
	at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:59)
	at net.sf.hibernate.type.NullableType.nullSafeGet(NullableType.java:51)
	at net.sf.hibernate.type.ComponentType.nullSafeGet(ComponentType.java:139)
	at net.sf.hibernate.collection.CollectionPersister.readElement(CollectionPersister.java:377)
	at net.sf.hibernate.collection.Set.readFrom(Set.java:242)
	at net.sf.hibernate.loader.Loader.doFind(Loader.java:175)
	at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:602)
	at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:82)
	at net.sf.hibernate.impl.SessionImpl.initialize(SessionImpl.java:2897)
	at net.sf.hibernate.collection.PersistentCollection.getInitialValue(PersistentCollection.java:128)
	at net.sf.hibernate.type.PersistentCollectionType.getCollection(PersistentCollectionType.java:74)
	at net.sf.hibernate.type.PersistentCollectionType.resolveIdentifier(PersistentCollectionType.java:177)
	at net.sf.hibernate.impl.SessionImpl.initializeEntity(SessionImpl.java:1959)
	at net.sf.hibernate.loader.Loader.doFind(Loader.java:196)
	at net.sf.hibernate.loader.Loader.loadEntity(Loader.java:587)
	at net.sf.hibernate.loader.EntityLoader.load(EntityLoader.java:42)
	at net.sf.hibernate.persister.EntityPersister.load(EntityPersister.java:396)
	at net.sf.hibernate.impl.SessionImpl.doLoad(SessionImpl.java:1889)
	at net.sf.hibernate.impl.SessionImpl.doLoadByClass(SessionImpl.java:1757)
	at net.sf.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:1716)
	at net.sf.hibernate.type.ManyToOneType.resolveIdentifier(ManyToOneType.java:62)
	at net.sf.hibernate.type.EntityType.nullSafeGet(EntityType.java:109)
	at net.sf.hibernate.impl.IteratorImpl.postNext(IteratorImpl.java:57)
	at net.sf.hibernate.impl.IteratorImpl.next(IteratorImpl.java:70)
	... 1 more


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