com.alibaba.hotswap.processor.constructor.modifier.ConstructorInvokeModifier.java Source code

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Here is the source code for com.alibaba.hotswap.processor.constructor.modifier.ConstructorInvokeModifier.java

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/*
 * Copyright 2012 Alibaba.com All right reserved. This software is the
 * confidential and proprietary information of Alibaba.com ("Confidential
 * Information"). You shall not disclose such Confidential Information and shall
 * use it only in accordance with the terms of the license agreement you entered
 * into with Alibaba.com.
 */
package com.alibaba.hotswap.processor.constructor.modifier;

import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;

import com.alibaba.hotswap.constant.HotswapConstants;
import com.alibaba.hotswap.meta.ClassMeta;
import com.alibaba.hotswap.meta.MethodMeta;
import com.alibaba.hotswap.processor.basic.BaseMethodAdapter;
import com.alibaba.hotswap.runtime.HotswapRuntime;
import com.alibaba.hotswap.util.HotswapMethodUtil;

/**
 * @author zhuyong 2012-7-3
 */
public class ConstructorInvokeModifier extends BaseMethodAdapter {

    public ConstructorInvokeModifier(MethodVisitor mv, int access, String name, String desc) {
        super(mv, access, name, desc);
    }

    @Override
    public void visitMethodInsn(int opcode, String owner, String name, String desc) {
        if (opcode == Opcodes.INVOKESPECIAL && name.equals(HotswapConstants.INIT)) {
            if (HotswapRuntime.hasClassMeta(owner)) {
                // Try to reload owner.
                ClassMeta classMeta = HotswapRuntime.getClassMeta(owner);
                String mk = HotswapMethodUtil.getMethodKey(name, desc);
                MethodMeta mm = classMeta.initMetas.get(mk);
                if (mm != null && mm.isAdded()) {
                    Type[] argsType = Type.getArgumentTypes(desc);
                    push(argsType.length);
                    newArray(Type.getType(Object.class));

                    for (int i = argsType.length - 1; i >= 0; i--) {
                        Type type = argsType[i];
                        swap();
                        box(type);
                        push(i);
                        swap();
                        // arrayStore(Type.getType(Object.class));
                        mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(HotswapMethodUtil.class),
                                "processConstructorArgs",
                                "([Ljava/lang/Object;ILjava/lang/Object;)[Ljava/lang/Object;");
                    }

                    mv.visitLdcInsn(Opcodes.ACONST_NULL);
                    swap();
                    mv.visitLdcInsn(mm.getIndex());
                    swap();
                    super.visitMethodInsn(opcode, owner, name, HotswapConstants.UNIFORM_CONSTRUCTOR_DESC);

                    return;
                }
            }
        }
        super.visitMethodInsn(opcode, owner, name, desc);
    }
}

// mv.visitLdcInsn(owner);
// mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(HotswapRuntime.class), "hasClassMeta",
// "(Ljava/lang/String;)Z");
// Label old = newLabel();
// ifZCmp(EQ, old);
//
// int methodIndex = HotswapMethodIndexHolder.getMethodIndex(owner, name, desc);
// Type[] argsType = Type.getArgumentTypes(desc);
//
// push(argsType.length);
// newArray(Type.getType(Object.class));
//
// for (int i = argsType.length - 1; i >= 0; i--) {
// Type type = argsType[i];
// swap();
// box(type);
// push(i);
// mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(HotswapMethodUtil.class),
// "processConstructorArgs",
// "([Ljava/lang/Object;Ljava/lang/Object;I)[Ljava/lang/Object;");
// }
//
// mv.visitLdcInsn(Opcodes.ACONST_NULL);
// swap();
// mv.visitLdcInsn(methodIndex);
// swap();
// super.visitMethodInsn(opcode, owner, name, HotswapConstants.UNIFORM_CONSTRUCTOR_DESC);
// Label end = newLabel();
// goTo(end);
// mark(old);
// super.visitMethodInsn(opcode, owner, name, desc);
// mark(end);
// return;