package org.nutz.aop.asm;
import org.nutz.repo.org.objectweb.asm.MethodVisitor;
import org.nutz.repo.org.objectweb.asm.Opcodes;
import org.nutz.repo.org.objectweb.asm.Type;
/**
* @author wendal(wendal1985@gmail.com)
*/
abstract class NormalMethodAdapter {
final String desc;
final int access;
final MethodVisitor mv;
/**
* Argument types of the method visited by this adapter.
*/
final Type[] argumentTypes;
NormalMethodAdapter(MethodVisitor mv, String desc, int access) {
this.mv = mv;
this.desc = desc;
this.access = access;
argumentTypes = Type.getArgumentTypes(this.desc);
}
abstract void visitCode();
/**
* Generates the instructions to load all the method arguments on the stack.
*/
void loadArgs() {
loadArgs(0, argumentTypes.length);
}
void loadArgs(final int arg, final int count) {
int index = 1;
for (int i = 0; i < count; ++i) {
Type t = argumentTypes[arg + i];
loadInsn(t, index);
index += t.getSize();
}
}
/**
* Generates the instruction to push a local variable on the stack.
*
* @param type
* the type of the local variable to be loaded.
* @param index
* an index in the frame's local variables array.
*/
void loadInsn(final Type type, final int index) {
mv.visitVarInsn(type.getOpcode(Opcodes.ILOAD), index);
}
}