public void getDeclaredMethod(
ClassFile file,
Bytecode code,
String declaringClass,
String methodName,
String[] parameterTypes) {
// get the correct class type to use to resolve the method
MethodInformation methodInfo =
new StaticMethodInformation(
"getTargetClass",
parameterTypes,
"Ljava/lang/Class;",
TargetInstanceProxy.class.getName());
invokeMethodHandler(file, code, methodInfo, false, DEFAULT_METHOD_RESOLVER);
code.addCheckcast("java/lang/Class");
// now we have the class on the stack
code.addLdc(methodName);
// now we need to load the parameter types into an array
code.addIconst(parameterTypes.length);
code.addAnewarray("java.lang.Class");
for (int i = 0; i < parameterTypes.length; ++i) {
code.add(Opcode.DUP); // duplicate the array reference
code.addIconst(i);
// now load the class object
String type = parameterTypes[i];
BytecodeUtils.pushClassType(code, type);
// and store it in the array
code.add(Opcode.AASTORE);
}
code.addInvokevirtual(
"java.lang.Class",
"getDeclaredMethod",
"(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;");
}
/** Client proxies use the following hashCode: <code>MyProxyName.class.hashCode()</code> */
@Override
protected MethodInfo generateHashCodeMethod(ClassFile proxyClassType) {
MethodInfo method = new MethodInfo(proxyClassType.getConstPool(), "hashCode", "()I");
method.setAccessFlags(AccessFlag.PUBLIC);
Bytecode b = new Bytecode(proxyClassType.getConstPool());
// MyProxyName.class.hashCode()
int classLocation = proxyClassType.getConstPool().addClassInfo(proxyClassType.getName());
b.addLdc(classLocation);
// now we have the class object on top of the stack
b.addInvokevirtual("java.lang.Object", "hashCode", "()I");
// now we have the hashCode
b.add(Opcode.IRETURN);
b.setMaxLocals(1);
b.setMaxStack(1);
method.setCodeAttribute(b.toCodeAttribute());
return method;
}
/* MemberCodeGen overrides this method.
*/
protected void atClassObject2(String cname) throws CompileError {
int start = bytecode.currentPc();
bytecode.addLdc(cname);
bytecode.addInvokestatic("java.lang.Class", "forName", "(Ljava/lang/String;)Ljava/lang/Class;");
int end = bytecode.currentPc();
bytecode.addOpcode(Opcode.GOTO);
int pc = bytecode.currentPc();
bytecode.addIndex(0); // correct later
bytecode.addExceptionHandler(
start, end, bytecode.currentPc(), "java.lang.ClassNotFoundException");
/* -- the following code is for inlining a call to DotClass.fail().
int var = getMaxLocals();
incMaxLocals(1);
bytecode.growStack(1);
bytecode.addAstore(var);
bytecode.addNew("java.lang.NoClassDefFoundError");
bytecode.addOpcode(DUP);
bytecode.addAload(var);
bytecode.addInvokevirtual("java.lang.ClassNotFoundException",
"getMessage", "()Ljava/lang/String;");
bytecode.addInvokespecial("java.lang.NoClassDefFoundError", "<init>",
"(Ljava/lang/String;)V");
*/
bytecode.growStack(1);
bytecode.addInvokestatic(
"javassist.runtime.DotClass",
"fail",
"(Ljava/lang/ClassNotFoundException;)" + "Ljava/lang/NoClassDefFoundError;");
bytecode.addOpcode(ATHROW);
bytecode.write16bit(pc, bytecode.currentPc() - pc + 1);
}
public void atStringL(StringL s) throws CompileError {
exprType = CLASS;
arrayDim = 0;
className = jvmJavaLangString;
bytecode.addLdc(s.get());
}
