package bcelifier; import org.apache.commons.bcel6.generic.*; import org.apache.commons.bcel6.classfile.*; import org.apache.commons.bcel6.*; import java.io.*; public class MethodCallCreator implements Constants { private InstructionFactory _factory; private ConstantPoolGen _cp; private ClassGen _cg; public MethodCallCreator() { _cg = new ClassGen("bcelifier.MethodCall", "java.lang.Object", "MethodCall.java", ACC_PUBLIC | ACC_SUPER, new String[] { }); _cp = _cg.getConstantPool(); _factory = new InstructionFactory(_cg, _cp); } public void create(OutputStream out) throws IOException { createMethod_0(); createMethod_1(); createMethod_2(); _cg.getJavaClass().dump(out); } private void createMethod_0() { InstructionList il = new InstructionList(); MethodGen method = new MethodGen(ACC_PUBLIC, Type.VOID, Type.NO_ARGS, new String[] { }, "", "bcelifier.MethodCall", il, _cp); InstructionHandle ih_0 = il.append(_factory.createLoad(Type.OBJECT, 0)); il.append(_factory.createInvoke("java.lang.Object", "", Type.VOID, Type.NO_ARGS, Constants.INVOKESPECIAL)); InstructionHandle ih_4 = il.append(_factory.createReturn(Type.VOID)); method.setMaxStack(); method.setMaxLocals(); _cg.addMethod(method.getMethod()); il.dispose(); } private void createMethod_1() { InstructionList il = new InstructionList(); MethodGen method = new MethodGen(0, Type.VOID, Type.NO_ARGS, new String[] { }, "methode", "bcelifier.MethodCall", il, _cp); InstructionHandle ih_0 = il.append(_factory.createReturn(Type.VOID)); method.setMaxStack(); method.setMaxLocals(); _cg.addMethod(method.getMethod()); il.dispose(); } private void createMethod_2() { InstructionList il = new InstructionList(); MethodGen method = new MethodGen(0, Type.VOID, new Type[] { new ObjectType("java.lang.Runnable") }, new String[] { "arg0" }, "methode2", "bcelifier.MethodCall", il, _cp); InstructionHandle ih_0 = il.append(_factory.createLoad(Type.OBJECT, 0)); il.append(_factory.createInvoke("bcelifier.MethodCall", "methode", Type.VOID, Type.NO_ARGS, Constants.INVOKEVIRTUAL)); InstructionHandle ih_4 = il.append(_factory.createLoad(Type.OBJECT, 1)); il.append(_factory.createInvoke("java.lang.Runnable", "run", Type.VOID, Type.NO_ARGS, Constants.INVOKEINTERFACE)); InstructionHandle ih_10 = il.append(_factory.createReturn(Type.VOID)); method.setMaxStack(); method.setMaxLocals(); _cg.addMethod(method.getMethod()); il.dispose(); } public static void main(String[] args) throws Exception { bcelifier.MethodCallCreator creator = new bcelifier.MethodCallCreator(); creator.create(new FileOutputStream("bcelifier.MethodCall.class")); } }