[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3178) Disappearing values for a managed Map

[Peter Aarestad (JIRA)]

Disappearing values for a managed Map
-------------------------------------

                 Key: HHH-3178
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3178
             Project: Hibernate3
          Issue Type: Bug
    Affects Versions: 3.2.6
         Environment: Hibernate 3.2.6, Microsoft SQL Server 2005
            Reporter: Peter Aarestad


My mapping looks like this (obfuscated but functionally equivalent):

{code}
<hibernate-mapping package="foo.bar.blah">
    <class name="PaperTypes" table="PaperTypes" lazy="false">
        <id name="paperTypeId" column="paperTypeID">
            <generator class="native" />
        </id>
       <!-- other properties -->
        
        <map name="weightsAvailable" table="PaperWeightsAvailable" 
        	inverse="true" lazy="false" 
        	cascade="all-delete-orphan">
        	<key column="fk_paperTypeID" />
        	<map-key-many-to-many class="PaperWeight" column="fk_paperWeightID" />
        	<one-to-many class="PaperWeightsAvailable" />
        </map>
    </class>
</hibernate-mapping>
{code}

For at least one version of the PaperTypes object, I'm getting an issue where, when you examine the "weightsAvailable" Map, you see that it is paired correctly with a PaperWeightsAvailable object, but get() comes back null. So this code dies:

{code}
// 'map' is the Hibernate map
Map<Integer, Set<Integer>> deflated = new Hashtable<Integer, Set<Integer>>();
Set<PaperWeight> keys = new TreeSet<PaperWeight>(workingMap.keySet());

for (PaperWeight pw : keys) {
	    Set<Integer> set = new TreeSet<Integer>();

		// This is where it dies: workingMap.get(pw) should NEVER come back null, but it does sometimes...
		for (PaperSizes ps : workingMap.get(pw).getSizesAvailable()) {
			set.add(ps.getPaperSizeId());
		}
		deflated.put(pw.getPaperWeightId(), set);
}
{code}

I worked around this bug by creating a new HashMap based on the Hibernate map:

{code}
Map<PaperWeight, PaperWeightsAvailable> workingMap = new HashMap<PaperWeight, PaperWeightsAvailable>(map);
{code}

but that should not be necssarily obviouisly.

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