Steve Sevik wrote:
Hello,
I'm a new user of BCEL. I am trying to get access to methods called from within methods. I tried all possible classes that I could think of, but in vain. Can somebody help me out please ?
My Class 'myClass' has two methods A, B ; and the main method calls method A which in turn calls method B, I was able to get the main method and print its code using the following code:
JavaClass clazz = Repository.lookupClass(myClass); Method[] methods = clazz.getMethods(); for(int i=0; i < methods.length; i++){ if("main".equals(methods[i].getName())){ Code code = methods[i].getCode(); System.out.println(code.toString()); } }
How can I get access to method A from within main ?
I want to print out the fact that main calls method A.
Then get access to method A's code from there and print out the fact that it calls method B.
import org.apache.bcel.Constants; import org.apache.bcel.generic.*;
ClassGen classGen = new ClassGen(clazz);
MethodGen methodGen = new MethodGen(methods[i], clazz.getClassName(), classGen.getConstantPool());
InstructionList il = methodGen.getInstructionList();
for (Iterator i = il.iterator(); i.hasNext(); ) {
InstructionHandle handle = (InstructionHandle) i.next();
if (handle.getInstruction() instanceof InvokeInstruction) {
InvokeInstruction invokeInstruction = (InvokeInstruction) handle.getInstruction();
String calledClass = invokeInstruction.getClassName(classGen.getConstantPool());
String calledMethodName = invokeInstruction.getName(classGen.getConstantPool());
String calledMethodSignature = invokeInstruction.getSignature(classGen.getConstantPool());
boolean isStaticMethod = invokeInstruction.getOpcode() == Constants.INVOKESTATIC;
// now you can check to see if the method called is the one you want } }
-Dave
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