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https://issues.apache.org/jira/browse/VELOCITY-924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17011815#comment-17011815
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Thomas Mortagne edited comment on VELOCITY-924 at 1/9/20 1:34 PM:
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Actually this behavior might be expected. It works well when the class itself
is public.
was (Author: tmortagne):
Actually this behavior might be expected, not sure. It works well when the
class is public.
> Bad cache handling for java.lang.Class methods
> ----------------------------------------------
>
> Key: VELOCITY-924
> URL: https://issues.apache.org/jira/browse/VELOCITY-924
> Project: Velocity
> Issue Type: Bug
> Components: Engine
> Affects Versions: 2.2
> Reporter: Thomas Mortagne
> Assignee: Claude Brisson
> Priority: Blocker
> Labels: regression
> Fix For: 2.2
>
>
> Requirement:
> A binding $var containing an object which class (org.xwiki.MyClass)
> implementing a {{String getName()}} method.
> The following code:
> {code}
> $var.class.getName()
> $var.getName()
> {code}
> fail with:
> {noformat}
> Caused by: org.apache.velocity.exception.MethodInvocationException:
> Invocation of method 'getName' in class org.xwiki.MyClass threw exception
> java.lang.IllegalArgumentException: object is not an instance of declaring
> class at mytemplaye[line 1, column 26]
> at
> org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:306)
> at
> org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:239)
> at
> org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:369)
> at
> org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:490)
> at
> org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:423)
> at org.apache.velocity.Template.merge(Template.java:358)
> at org.apache.velocity.Template.merge(Template.java:262)
> at
> org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:271)
> ... 69 more
> Caused by: java.lang.IllegalArgumentException: object is not an instance of
> declaring class
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:565)
> at
> org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:548)
> at
> org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:219)
> ... 75 more
> {noformat}
> The reason is that ClassUtils.getMethod cache does not make any difference
> between an instance of Class<org.xwiki.MyClass> and and instance of
> org.xwiki.MyClass so when ASTMethod#execute ask for the second getName() it
> end up with Class#getName() instead of MyClass#getName().
> Was working fine in 1.7.
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