4:17 p.m.
[
https://jira.jboss.org/browse/WELD-737?page=com.atlassian.jira.plugin.sys...
]
Stuart Douglas commented on WELD-737:
-------------------------------------
The problem is that this is a JVM level restriction.
The JVM requires all constructors to call super() or another constructor on the current
class, and the JVM also enforces access permissions. This means that if you try and load a
subclass of the class that only has a package private constructor you must load it in the
same CL as the class being proxied, as when it attempts to call super() an
IllegalAccessError will be thrown. (The link you posted to Guice's bridge class loader
actually states it is not used when access package-private methods, for precisely this
reason).
The support for private constructors that you mention is a non standard extension that
currently only works on hotspot (as is uses com.sun.Unsafe.allocateInstance()), the CDI
spec does not require proxying of classes with a private default constructor as it is not
possible to do it in a portable way.
The javassist dependencies in the proxies are going to be removed as they are no longer
necessary now that we use a custom ProxyFactory, however the proxies will still be
dependent on org.jboss.weld classes (although these classes should be exported from the
osgi bundle).
Proxy instantiation fails with IllegalAccessError for Beans with
package private constructor
--------------------------------------------------------------------------------------------
Key: WELD-737
URL: https://jira.jboss.org/browse/WELD-737
Project: Weld
Issue Type: Bug
Components: Proxies
Affects Versions: 1.1.0.Beta1
Reporter: Sivakumar Thyagarajan
Attachments: package-private-constructor-issue.tar.bz2, ProxyServicesImpl.java
For Beans with package private constructors, proxy instantiation fails with an Illegal
access error as shown below. Since 1.1.0.Beta1 the proxy creation logic in
ProxyFactory.addConstructors handles private constructors correctly but doesn't
consider package private constructors.
----
Caused by: java.lang.IllegalAccessError: tried to access method
org.glassfish.tests.proxies.TestSessionScopedBean.<init>()V from class
org.glassfish.tests.proxies.org$jboss$weld$bean-$export$work$workspaces$gfv3$v3$distributions$glassfish$target$glassfish3$glassfish$domains$domain1$applications$jsr88-1370237334428885039$-ManagedBean-class_org$glassfish$tests$proxies$TestSessionScopedBean_$$_WeldProxy
at
org.glassfish.tests.proxies.org$jboss$weld$bean-$export$work$workspaces$gfv3$v3$distributions$glassfish$target$glassfish3$glassfish$domains$domain1$applications$jsr88-1370237334428885039$-ManagedBean-class_org$glassfish$tests$proxies$TestSessionScopedBean_$$_WeldProxy.<init>(org$jboss$weld$bean-$export$work$workspaces$gfv3$v3$distributions$glassfish$target$glassfish3$glassfish$domains$domain1$applications$jsr88-1370237334428885039$-ManagedBean-class_org$glassfish$tests$proxies$TestSessionScopedBean_$$_WeldProxy.java)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at
org.jboss.weld.util.reflection.SecureReflections$16.work(SecureReflections.java:396)
at
org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:54)
at
org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInstantiation(SecureReflectionAccess.java:216)
at
org.jboss.weld.util.reflection.SecureReflections.newInstance(SecureReflections.java:391)
at org.jboss.weld.bean.proxy.ProxyFactory.create(ProxyFactory.java:218)
at
org.jboss.weld.bean.proxy.ClientProxyProvider.createClientProxy(ClientProxyProvider.java:89)
at
org.jboss.weld.bean.proxy.ClientProxyProvider.access$000(ClientProxyProvider.java:40)
at
org.jboss.weld.bean.proxy.ClientProxyProvider$1.apply(ClientProxyProvider.java:53)
at
org.jboss.weld.bean.proxy.ClientProxyProvider$1.apply(ClientProxyProvider.java:44)
at
com.google.common.collect.ComputingConcurrentHashMap.compute(ComputingConcurrentHashMap.java:206)
----
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