GroIMP wiki - 01_user_documentation:07_rgg_xl:02_xl:08_object:02_pattern
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2026-05-16T10:31:47+00:00GroIMP wiki
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https://dokuwiki.grogra.de/lib/exe/fetch.php?media=wiki:dokuwiki.svgtext/html2025-09-03T15:34:35+00:00Anonymous (anonymous@undisclosed.example.com)In XL
https://dokuwiki.grogra.de/doku.php?id=01_user_documentation:07_rgg_xl:02_xl:08_object:02_pattern:01_inrgg&rev=1756913675&do=diff
In XL
Custom patterns can be created in XL with the simple syntax:
class patternName(@In Node a, @Out Node b) (
// some patterns
)
Declaring In/Out
Custom patterns requires to declare variable with both annotations @In and @Out. It can be two different variables, or the same one.
E.g.text/html2025-09-02T16:27:07+00:00Anonymous (anonymous@undisclosed.example.com)In Java
https://dokuwiki.grogra.de/doku.php?id=01_user_documentation:07_rgg_xl:02_xl:08_object:02_pattern:02_injava&rev=1756830427&do=diff
In Java
The minimal format to declare a pattern as java object is:
class X extends Node {
static class Pattern extends UserDefinedPattern {
private static void signature(@In @Out X node) {}
public Matcher createMatcher(Graph graph, XBitSet bound,
IntList requiredAsBound) {...}
}
}