How can I get the generic information of class using BCEL?
题
I would like to get the generic information (Counter class) of my CounterPersistence class using BCEL 6.0-SNAPSHOT. The signature is like this:
public interface CounterPersistence extends BasePersistence<Counter> {
....
}
I'm using the following code to read the bytecode
JavaClass javaClass = ...;
Attribute[] attributes = javaClass.getAttributes();
for (Attribute attribute : attributes) {
if (attribute instanceof Signature) {
Signature signature = (Signature) attribute;
//put the code here that get the Counter class from the signature
}
}
But I'm failing to write a code that parse the signature and allow me to get the type Counter. Thoughts?
解决方案
You can use BCEL utilities from FindBugs, e.g. GenericUtilities.getTypeParameters(...) method or better switch to ASM framework.
其他提示
I found a solution:
Class.forName(org.apache.bcel.classfile.Utility.methodSignatureArgumentTypes("(" + signature + ")V")[0]);
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