[TAP5-21] Misleading error message when a component sub-class invokes non-default constructor of parent component class

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Abandoned
• Affects Version/s: 5.0.15
• Environment: Linux, Sun JDK 1.6
• Assignee: Howard Lewis Ship
• Reporter: Jens Pfau
• Created: 14/Mar/08 07:42
• Updated: 23/Nov/11 19:06
• Resolved: 23/Nov/11 19:06

Description

Some of my pages inherit from a common abstract base class but even if I move this to <root package>.base, I receive the following application exception:

Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: caught an exception while obtaining a class file for <root package>.pages.MyPage
at org.apache.tapestry.internal.services.ComponentInstantiatorSourceImpl.findClass(ComponentInstantiatorSourceImpl.java:241)
at org.apache.tapestry.internal.services.ComponentInstantiatorSourceImpl.findInstantiator(ComponentInstantiatorSourceImpl.java:223)
at $ComponentInstantiatorSource_118ac384906.findInstantiator($ComponentInstantiatorSource_118ac384906.java)
at org.apache.tapestry.internal.services.PageElementFactoryImpl.newRootComponentElement(PageElementFactoryImpl.java:257)
at $PageElementFactory_118ac384934.newRootComponentElement($PageElementFactory_118ac384934.java)
at org.apache.tapestry.internal.services.PageLoaderProcessor.loadRootComponent(PageLoaderProcessor.java:413)
at org.apache.tapestry.internal.services.PageLoaderProcessor.loadPage(PageLoaderProcessor.java:391)
at org.apache.tapestry.internal.services.PageLoaderImpl.loadPage(PageLoaderImpl.java:60)
at $PageLoader_118ac384932.loadPage($PageLoader_118ac384932.java)
at org.apache.tapestry.internal.services.PagePoolCache.checkout(PagePoolCache.java:188)
at org.apache.tapestry.internal.services.PagePoolImpl.checkout(PagePoolImpl.java:107)
at $PagePool_118ac384931.checkout($PagePool_118ac384931.java)
at org.apache.tapestry.internal.services.RequestPageCacheImpl.get(RequestPageCacheImpl.java:43)
at $RequestPageCache_118ac384930.get($RequestPageCache_118ac384930.java)
at $RequestPageCache_118ac384903.get($RequestPageCache_118ac384903.java)
at org.apache.tapestry.internal.services.LinkFactoryImpl.createPageLink(LinkFactoryImpl.java:239)
at $LinkFactory_118ac384935.createPageLink($LinkFactory_118ac384935.java)
at org.apache.tapestry.internal.structure.PageImpl.createPageLink(PageImpl.java:161)
at org.apache.tapestry.internal.structure.InternalComponentResourcesImpl.createPageLink(InternalComponentResourcesImpl.java:128)
at org.apache.tapestry.corelib.components.PageLink.beginRender(PageLink.java:73)
at org.apache.tapestry.corelib.components.PageLink.beginRender(PageLink.java)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl$11$1.run(ComponentPageElementImpl.java:338)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl.invoke(ComponentPageElementImpl.java:874)
... 62 more
Caused by: java.lang.ClassNotFoundException: caught an exception while obtaining a class file for <root package>.pages.MyPage
at javassist.Loader.findClass(Loader.java:359)
at org.apache.tapestry.internal.services.ComponentInstantiatorSourceImpl$PackageAwareLoader.findClass(ComponentInstantiatorSourceImpl.java:73)
at javassist.Loader.loadClass(Loader.java:311)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at org.apache.tapestry.internal.services.ComponentInstantiatorSourceImpl.findClass(ComponentInstantiatorSourceImpl.java:237)
... 84 more
Caused by: java.lang.RuntimeException: Base class <root package>.base.AbstractPage (super class of <root package>.pages.MyPage) is not in a controlled package and is therefore not valid. You should try moving the class to package <root package>.base.
at org.apache.tapestry.internal.services.ComponentClassTransformerImpl.transformComponentClass(ComponentClassTransformerImpl.java:126)
at $ComponentClassTransformer_118ac384913.transformComponentClass($ComponentClassTransformer_118ac384913.java)
at org.apache.tapestry.internal.services.ComponentInstantiatorSourceImpl.onLoad(ComponentInstantiatorSourceImpl.java:162)
at javassist.Loader.findClass(Loader.java:340)
... 88 more

Issue Links

• relates to: TAPESTRY-1883 Don't require page base classes to be in a 'pages' package (or give good warnings)