com.alibaba.hotswap.processor.jdk.reflect.modifier.GetXModifier.java Source code

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Here is the source code for com.alibaba.hotswap.processor.jdk.reflect.modifier.GetXModifier.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.jdk.reflect.modifier;

import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.Method;

import com.alibaba.hotswap.processor.basic.BaseMethodAdapter;
import com.alibaba.hotswap.processor.jdk.helper.FieldReflectHelper;

/**
 * @author zhuyong 2012-6-26
 */
public class GetXModifier extends BaseMethodAdapter {

    private String desc;

    public GetXModifier(MethodVisitor mv, int access, String name, String desc) {
        super(mv, access, name, desc);
        this.desc = desc;
    }

    @Override
    public void visitCode() {
        super.visitCode();

        loadArg(0);
        loadThis();
        invokeStatic(Type.getType(FieldReflectHelper.class),
                new Method("isInHotswapFieldHolder", "(Ljava/lang/Object;Ljava/lang/reflect/Field;)Z"));
        Label old = newLabel();
        ifZCmp(EQ, old);

        loadArg(0);
        loadThis();

        invokeStatic(Type.getType(FieldReflectHelper.class), new Method("getHotswapFieldHolderValue",
                "(Ljava/lang/Object;Ljava/lang/reflect/Field;)Ljava/lang/Object;"));
        unbox(Type.getReturnType(desc));
        returnValue();
        mark(old);
    }
}