Why would you get an error on the getter method of a primary key? That was what I was thinking too.
Here is a bit more detail:
Code:
2007-03-05 16:44:14,734 ERROR [btpool0-4] property.BasicPropertyAccessor - IllegalArgumentException in class: com.cabs.domain.Style, getter method of property: id
And just so you know I'm not too thick, the Style.java:
Code:
public class Style {
private int id;
private List<Range> ranges;
/*
* Constructors
*/
public Style() {
super();
setRanges(new ArrayList<Range>());
}
/*
* Properties of this class
*/
public void setId(int id) {
this.id = id;
}
public int getId() {
return id;
}
public void setRanges(List<Range> ranges) {
this.ranges = ranges;
}
public List<Range> getRanges() {
return ranges;
}
}
Okay, there's not much can go wrong there. What about the hbm.xml for this class:
Code:
<class name="Style" table="cab_style">
<id name="id" column="_id" type="integer">
<generator class="identity" />
</id>
<list name="ranges" cascade="all-delete-orphan">
<key column="_stylerange" not-null="false" />
<list-index column="stylerange_no" />
<one-to-many class="Range" />
</list>
</class>
Still not much to go wrong. So when is the error happening? It's happening in my RangeServiceImpl.java, right about here:
Code:
public Range findById(int id) {
System.err.println("--------- RangeServiceImpl: range.findById = " + id);
List<Range> rs = getHibernateTemplate().find(
"select range " +
" from " + Range.class.getCanonicalName() + " range " +
" where range.id = ?", id);
System.err.println("--------- RangeServiceImpl: range.findById found objects = " + rs.size());
return rs.isEmpty() ? null : rs.get(0);
}
As you can imagine this might print something on the log:
--------- RangeServiceImpl: range.findById = 8
(followed by the error message)
By the way, id=8 is a valid Range record. Okay, so the record exists but what is the connection with the Style class? This is where it gets tricky, this is one of those two parents for one child type relationships.
Style: is parent 1
Rawcomp: is parent 2
Range: is a child
To create the initial range record I created a Rawcomp record, then added a Range record and saved this. Now when I try to load the Range record I get the error regarding 'IllegalArgumentException' on Style.
A Range record will have only one parent, it will be either a Rawcomp or a Style, not both. This seems to be causing me a problem.
Okay, so what have I got in my hbm.xml (I've trimmed some of the fields):
Code:
<class name="Rawcomp" table="cab_rawcomp">
<id name="id" column="_id" type="integer">
<generator class="identity" />
</id>
<list name="ranges" cascade="all-delete-orphan">
<key column="_rawcomprange" not-null="false" />
<list-index column="rawcomprange_no" />
<one-to-many class="Range" />
</list>
</class>
<class name="Style" table="cab_style">
<id name="id" column="_id" type="integer">
<generator class="identity" />
</id>
<list name="ranges" cascade="all-delete-orphan">
<key column="_stylerange" not-null="false" />
<list-index column="stylerange_no" />
<one-to-many class="Range" />
</list>
</class>
<class name="Range" table="cab_range">
<id name="id" column="_id" type="integer">
<generator class="identity" />
</id>
<many-to-one name="rawcomp" class="Rawcomp" column="_rawcomp" />
<many-to-one name="style" class="Style" column="_style" />
</class>
Can somebody tell me how I should be coding this?
Cheers
Murray
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