Package io.quarkus.deployment.pkg.steps

Class JarTreeShaker

java.lang.Object

io.quarkus.deployment.pkg.steps.JarTreeShaker

class JarTreeShaker
extends Object

Constructor Summary

Constructors

Constructor	Description
JarTreeShaker(JarTreeShakeInput input)

Method Summary

Modifier and Type	Method	Description
(package private) static Set<String>	extractStringClassReferences(byte[] bytecode, Set<String> knownClasses)	Extracts LDC string constants from bytecode that match known class names.
(package private) static void	matchClassNames(String str, Set<String> knownClasses, Set<String> refs)	Checks whether a string (or its comma/colon-delimited parts) matches known class names, adding matches to refs.
(package private) JarTreeShakeBuildItem	run()	Runs the tree-shake analysis: traces reachable classes from roots via BFS, evaluates conditional roots to a fixed point, computes removal stats, and returns a JarTreeShakeBuildItem with the reachable set and per-dependency removals.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

JarTreeShaker

JarTreeShaker(JarTreeShakeInput input)

Method Details

run

JarTreeShakeBuildItem run()

Runs the tree-shake analysis: traces reachable classes from roots via BFS, evaluates conditional roots to a fixed point, computes removal stats, and returns a JarTreeShakeBuildItem with the reachable set and per-dependency removals.

extractStringClassReferences

static Set<String> extractStringClassReferences(byte[] bytecode,
 Set<String> knownClasses)

Extracts LDC string constants from bytecode that match known class names. This catches class names passed as string arguments to methods that eventually call Class.forName() at runtime (e.g. Quarkus recorder generated code). Also handles delimited class name lists (comma, colon) used by frameworks like RESTEasy for provider and resource builder lists.

matchClassNames

static void matchClassNames(String str,
 Set<String> knownClasses,
 Set<String> refs)

Checks whether a string (or its comma/colon-delimited parts) matches known class names, adding matches to refs. Uses manual character-level splitting to avoid the per-call Pattern compilation that String.split(java.lang.String, int) incurs for the [,:] character class.