範例

public class BeanClass implements javax.ejb.SessionBean {
public Collection ejbFindByPrimaryKey (String key) throws FinderException{
PrimaryKey pKey = new PrimaryKey(key);
Collection result;
searchByPrimaryKey(pKey);
if (pKey.exists())
result = pKey;
return result;
else
throw new ObjectNotFoundException("Primary Key "+ key + " not found");
}
//必須實作這個介面的方法
}

解決方案
ejbFindByPrimaryKey() 應該傳回主要索引鍵。其他 finder 方法應該傳回索引鍵集合。


public class BeanClass implements javax.ejb.SessionBean {
public String ejbFindByPrimaryKey (String key) throws FinderException{
PrimaryKey pKey = new PrimaryKey(key);
searchByPrimaryKey(pKey);
if (pKey.exists())
return key;
else
throw new ObjectNotFoundException("Primary Key "+ key + " not found");
}
//必須實作這個介面的方法
}