PCClassFileTransformer.transform causing NPE when class name is null
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Key: OPENJPA-1676
URL: https://issues.apache.org/jira/browse/OPENJPA-1676
Project: OpenJPA
Issue Type: Bug
Components: UnenhancedClasses
Affects Versions: 2.0.0
Environment: jdk1.6.20
Reporter: Christophe Roos
openjpa WARN [AWT-EventQueue-0] openjpa.Enhance - An exception was thrown
while attempting to perform class file transformation on "null":
java.lang.NullPointerException
at
org.apache.openjpa.enhance.PCClassFileTransformer.needsEnhance(PCClassFileTransformer.java:175)
at
org.apache.openjpa.enhance.PCClassFileTransformer.transform0(PCClassFileTransformer.java:132)
at
org.apache.openjpa.enhance.PCClassFileTransformer.transform(PCClassFileTransformer.java:120)
at
sun.instrument.TransformerManager.transform(TransformerManager.java:169)
at
sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:365)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
at java.lang.ClassLoader.defineClass(ClassLoader.java:466)
at
com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl$TransletClassLoader.defineClass(TemplatesImpl.java:126)
at
com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl.defineTransletClasses(TemplatesImpl.java:312)
at
com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl.getTransletInstance(TemplatesImpl.java:349)
at
com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl.newTransformer(TemplatesImpl.java:382)
at
net.sourceforge.jeuclid.DOMBuilder.createTransformer(DOMBuilder.java:95)
at net.sourceforge.jeuclid.DOMBuilder.<init>(DOMBuilder.java:75)
at
net.sourceforge.jeuclid.DOMBuilder$SingletonHolder.<clinit>(DOMBuilder.java:53)
at net.sourceforge.jeuclid.DOMBuilder.getInstance(DOMBuilder.java:110)
at
net.sourceforge.jeuclid.layout.JEuclidView.<init>(JEuclidView.java:75)
The code causing the error is in the JVM, because defineClass is called with a
null class name:
static final class TransletClassLoader extends ClassLoader {
TransletClassLoader(ClassLoader parent) {
super(parent);
}
/**
* Access to final protected superclass member from outer class.
*/
Class defineClass(final byte[] b) {
====> return defineClass(null, b, 0, b.length); <=====
}
}
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