Catching Throwable does not catch LazyInitializationExceptio

[flipmind]

I have an entity class with a toString() method but it is failing with a LazyInitializationException.

How can isDAOAccessable() thrown an exception if it is catching Throwable? I am using jboss-4.0.5.GA


@Entity
@Table(name = "STOCKITEM")
@IdClass(ProductKey.class)
public class Product implements Serializable {
@Override
public String toString()
{
String desc = "PRODUCTCODE:=" + this.getProductCode() + ", TITLE:=" + title +
", RICHDESCRIPTION:=" + richDescription + ", ICONSSTR:=" + iconsstr + ", ORDER_LIMIT_QTY:=" +
maximumItemPerOrder + ", PRODUCTVARIANTS:=[\n";
if ( CommonUtils.isDAOAccessable(productVariants))
for(ProductVariant pVar : productVariants)
desc += pVar.toString() + "\n";
else
desc += "null";

}
}


/**
* Checks if a Collection returned using Hibernate has been loaded or
* if it will cause a lazy loaded exception
* @param c
* @return
*/
public static boolean isDAOAccessable(Collection c) {
try {
System.out.println("WORD UP");
if (c==null) {
return false;
}
else {
c.iterator().hasNext();
return true; // It is ok
}
}
catch (Throwable ex){
return false;
}
}


This is the result

19:26:23,898 INFO [STDOUT] WORD UP
19:26:23,898 ERROR [LazyInitializationException] failed to lazily initialize a c
ollection of role: estore.common.Product.productVariants, no s
ession or session was closed
org.hibernate.LazyInitializationException: failed to lazily initialize a collect
ion of role: estore.common.Product.productVariants, no session
or session was closed
at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitia
lizationException(AbstractPersistentCollection.java:358)
at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitia
lizationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
at org.hibernate.collection.AbstractPersistentCollection.initialize(Abst
ractPersistentCollection.java:343)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPe
rsistentCollection.java:86)
at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:16
3)
at estore.common.util.CommonUtils.isDAOAccessable(Ljav
a.util.Collection;)Z(Unknown Source)
at estore.common.Product.toString()Ljava.lang.String;(
Unknown Source)
at org.apache.log4j.or.DefaultRenderer.doRender(DefaultRenderer.java:26)

at org.apache.log4j.or.RendererMap.findAndRender(RendererMap.java:70)
at org.apache.log4j.spi.LoggingEvent.getRenderedMessage(LoggingEvent.jav
a:288)
at org.apache.log4j.helpers.PatternParser$BasicPatternConverter.convert(
PatternParser.java:395)
at org.apache.log4j.helpers.PatternConverter.format(PatternConverter.jav
a:56)
at org.apache.log4j.PatternLayout.format(PatternLayout.java:495)
at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:292)
at org.apache.log4j.WriterAppender.append(WriterAppender.java:150)

[alrubinger]

I think you're going to have to actually move the Collection's internal pointer or attempt to access an element, rather than simply checking "hasNext()", for Hibernate to throw a LazyInitializationException.

S,
ALR