ClassFormatException during Javaflow class enhancement
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Key: SANDBOX-174
URL: http://issues.apache.org/jira/browse/SANDBOX-174
Project: Commons Sandbox
Issue Type: Bug
Components: JCI
Reporter: Maurizio Pillitu
Attachments: commons-jci.diff
org.apache.bcel.classfile.ClassFormatException: null is not a Java .class file
at org.apache.bcel.classfile.ClassParser.readID(ClassParser.java:286)
at org.apache.bcel.classfile.ClassParser.parse(ClassParser.java:155)
at
org.apache.commons.javaflow.bytecode.transformation.bcel.BcelClassTransformer.transform(BcelClassTransformer.java:117)
at
org.apache.commons.javaflow.stores.TransformingResourceStore.write(TransformingResourceStore.java:50)
at
org.apache.commons.javaflow.stores.JavaflowResourceStore.onStop(JavaflowResourceStore.java:81)
at
org.apache.cocoon.components.flow.java.JavaflowResourceStore.onStop(JavaflowResourceStore.java:101)
at
org.apache.commons.jci.listeners.ReloadingListener.onStop(ReloadingListener.java:120)
at
org.apache.commons.jci.monitor.FilesystemAlterationMonitor.onStop(FilesystemAlterationMonitor.java:261)
at
org.apache.commons.jci.monitor.FilesystemAlterationMonitor.run(FilesystemAlterationMonitor.java:420)
at java.lang.Thread.run(Thread.java:595)
The exception is triggered because the bytecode of the .class file is not
recognized; the error resides in
org.apache.commons.jci.listeners.ReloadingListener, that uses a FileReader to
read the file and converts it in a stream of characters :
.........
final File file = (File) it.next();
try {
final byte[] bytes = IOUtils.toByteArray(new
FileReader(file));
final String resourceName =
ReloadingClassLoader.clazzName(repository, file);
//if (resourceName.endsWith(".class")) {
store.write(resourceName, bytes);
........
Using FileInputStream it works correctly; all relevant tests work.
Attaching patch.
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