<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
I don't think that will be faster than just returning all of the
elements and manually filtering in code, though. A positive search
will hit the lucene index and is generally much faster.<br>
<br>
<div class="moz-cite-prefix">On 08/07/2014 02:52 PM, Lincoln Baxter,
III wrote:<br>
</div>
<blockquote
cite="mid:CAEp_U4GF4u=XYja6i_ttCYavPFmUh-6Giuzt1vUZp0GB3O9_jA@mail.gmail.com"
type="cite">
<div dir="ltr">I think that negative queries could be added, just
like I added multi-queries in WINDUP-133: <a
moz-do-not-send="true"
href="https://github.com/lincolnthree/windup/blob/WINDUP-133/config/api/src/main/java/org/jboss/windup/config/query/QueryPropertyCriterion.java#L33">https://github.com/lincolnthree/windup/blob/WINDUP-133/config/api/src/main/java/org/jboss/windup/config/query/QueryPropertyCriterion.java#L33</a></div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Thu, Aug 7, 2014 at 2:47 PM, Jess
Sightler <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:jsightle@redhat.com" target="_blank">jsightle@redhat.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class=""><br>
On 07/31/2014 04:29 PM, Ondrej Zizka wrote:<br>
> When talking to Robb, we discussed the ability to
query for POJO classes<br>
> - i.e. those which do not have any vendor-specific
extension, do not use<br>
> blacklisted classes, do not extend something "dirty",
etc.<br>
><br>
> Which brings us to interesting concept - querying for
something "not<br>
> being a lot of things".<br>
><br>
> We have discussed this briefly on F2F with Brad.<br>
> The first shot could be:<br>
><br>
> * creating a method which will query for vertexes
that have some frame<br>
> type (JavaClass), but not any other, or a set of
other types<br>
> (WebLogicContextListener).<br>
<br>
</div>
One issue here is that the Titan Text predicate does not
directly<br>
support negations. I am not sure how easy it would be to add
this in a<br>
performant manner for a negated type search.<br>
<br>
I agree that this is a need, though for certain types of
queries.<br>
<div class=""><br>
><br>
> * querying for vertices which are not linked to
vertices in sevral<br>
> blacklists<br>
> For example, querying for JavaClass'es not
linked to a list of<br>
> other JavaClass'es by an "extends" edge.<br>
> This will need some way to keep the blacklists
in the graph, and<br>
> then, I can imagine Gremlin taking the part in
filtering out the<br>
> vertices linked to them by a set of edge types
("extends", "implements",<br>
> "annotatedBy", "calls", "imports", ...)<br>
><br>
> And creating a disjunction of all these results, by
narrowing the set of<br>
> candidate vertices, step by step.<br>
<br>
</div>
I think that things like require gremlin queries. It would
be logical<br>
for us to build some building blocks for complex queries
like this so<br>
that users don't have to fully understand gremlin (and the
rather<br>
complex graph structure) for more common operations. For an
example, see<br>
the FindClassifiedFilesGremlinCriterion class.<br>
<div class=""><br>
> What I think is a BAD approach, is this kind of rules
(outside of Java<br>
> basic analysis):<br>
><br>
>
Query.find(JavaClassModel.class).as("javaClasses")<br>
><br>
>
Iteration.over("javaClasses").as("javaClass").perform(<br>
> ...<br>
> )<br>
><br>
><br>
<br>
</div>
I don't think that anyone has advocated for that type of
approach,<br>
outside of the cases where you actually want to iterate over
all of the<br>
JavaClassModels in the graph.<br>
<div class="HOEnZb">
<div class="h5"><br>
_______________________________________________<br>
windup-dev mailing list<br>
<a moz-do-not-send="true"
href="mailto:windup-dev@lists.jboss.org">windup-dev@lists.jboss.org</a><br>
<a moz-do-not-send="true"
href="https://lists.jboss.org/mailman/listinfo/windup-dev"
target="_blank">https://lists.jboss.org/mailman/listinfo/windup-dev</a><br>
</div>
</div>
</blockquote>
</div>
<br>
<br clear="all">
<div><br>
</div>
-- <br>
Lincoln Baxter, III<br>
<a moz-do-not-send="true" href="http://ocpsoft.org"
target="_blank">http://ocpsoft.org</a><br>
"Simpler is better."
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
windup-dev mailing list
<a class="moz-txt-link-abbreviated" href="mailto:windup-dev@lists.jboss.org">windup-dev@lists.jboss.org</a>
<a class="moz-txt-link-freetext" href="https://lists.jboss.org/mailman/listinfo/windup-dev">https://lists.jboss.org/mailman/listinfo/windup-dev</a></pre>
</blockquote>
<br>
</body>
</html>