In case of Item -> Bid Bidirectional Association

Item.hbm.xml

code:


<!-- Item - Bid Association - One-to-Many -->
<set name="bids"
inverse="true"
cascade="all-delete-orphan">
<key column="ITEM_ID" />
<one-to-many class="Bid"/>
</set>



Item.java

code:


public void addBid(Bid bid)
{
System.out.println("Inside addBid(Bid bid)");
bid.setItem(this);
this.bids.add(bid);
}




Can you please justify the output in the following cases :
Case 1:
inverse="true"
bid.setItem(this);
RESULT : No Error. No INERST statement

Case 2:
inverse="false"
bid.setItem(this);
RESULT : No Error. No INERST statement

Case 3:
inverse="true"
this.bids.add(bid);
RESULT : Exception in thread "main" org.hibernate.PropertyValueException: not-null property references a null or transient value: Bid.item

Case 4:

inverse="false"
this.bids.add(bid);
RESULT : Exception in thread "main" org.hibernate.PropertyValueException: not-null property references a null or transient value: Bid.item

Either actually _read_ the book or go to the regular user forum. Nobody here will "justify" anything for you. Also learn how to post correctly highlighted code with [ code ] tags, and post full code not useless snippets.

Is this not a regular user forum? What is this forum all about ?

This forum is for comments about the content of two books. Now, if you have a question about the book content, you need to

- phrase your question in a way that people understand, in plain english

- show any relevant code not just random lines

- use code tags to format the code so people can read it

If the code you are posting is NOT from the examples in the book, line by line, or ideally from the code you can download (CaveatEmptor), then you are probably in the wrong forum.

From the questions you are asking (as far as I understand them) I can see that you have probably not read the book, or that you should read it again, or that you did not try the downloadable WORKING code.