A @OneToMany relationship with a Map loads the data only on the first call when specifying FetchType.LAZY;
@OneToMany(fetch = FetchType.LAZY, cascade = {CascadeType.PERSIST, CascadeType.MERGE}, mappedBy = "mStockLocation")
@MapKeyJoinColumn(name="EXTERNALARTICLE_ID")
private Map<ExternalArticle, ExternalArticleStockLocation> mExternalArticleStockLocationMap = new LinkedHashMap();
The first call for the map returns the Map with data;
public Map<ExternalArticle, ExternalArticleStockLocation> getExternalArticleStockLocationMap()
{
return mExternalArticleStockLocationMap;
}
The second call returns an empty HashMap. The problem 'disappears' when i switch to FetchType.EAGER or when i save the HashMap at the call;
public Map<ExternalArticle, ExternalArticleStockLocation> getExternalArticleStockLocationMap()
{
// Bug fix!
setExternalArticleStockLocationMap(mExternalArticleStockLocationMap);
return mExternalArticleStockLocationMap;
}
public void setExternalArticleStockLocationMap(Map<ExternalArticle, ExternalArticleStockLocation> pExternalArticleStockLocationMap)
{
mExternalArticleStockLocationMap = pExternalArticleStockLocationMap;
} |
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