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https://issues.apache.org/jira/browse/CAY-1241?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Laurentiu Cocanu updated CAY-1241:
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Attachment: patch.txt
A possible solution to this issue (also in the attached patch):
/**
* Creates an expression that matches the primary key of object in
<code>ObjectId</code>'s <code>IdSnapshot</code> for the argument
<code>object</code>.
*/
public static Expression matchObject(CayenneDataObject object) {
ObjectId obid = object.getObjectId();
Map<String, Object> objectIdKeys = obid.getIdSnapshot();
Iterator<String> it = objectIdKeys.keySet().iterator();
String key = it.next();
Object value = objectIdKeys.get(key);
Expression exp = ExpressionFactory.matchDbExp(key, value);
while(it.hasNext()) {
key = it.next();
value = objectIdKeys.get(key);
exp = exp.andExp(ExpressionFactory.matchDbExp(key,
value));
}
return exp;
}
/**
* Creates an expression that matches any of the objects contained in the
list <code>objects</code>
*/
public static Expression matchObjects(List<CayenneDataObject> objects) {
Iterator<CayenneDataObject> it = objects.iterator();
Expression exp = matchObject(it.next());
while(it.hasNext()) {
exp = exp.orExp(matchObject(it.next()));
}
return exp;
}
> Add method to ExpressionFactory to match against the primary key of an object
> or list of objects
> ------------------------------------------------------------------------------------------------
>
> Key: CAY-1241
> URL: https://issues.apache.org/jira/browse/CAY-1241
> Project: Cayenne
> Issue Type: Improvement
> Components: Cayenne Core Library
> Affects Versions: 3.0M6
> Reporter: Øyvind Harboe
> Attachments: patch.txt
>
>
> It would be helpful to have a method in ExpressionFactory that build an
> expression using matchDbExp() to match an object's primary keys.
> This can be helpful in excluding a single or list of known objects from the
> result of a query.
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