instanceof()的源码在哪,我找半天没找到 1C

1.我在源文件src和api里面都找不到,这是怎么回事呢,还是说他属于哪个类呢?
2.一般api有两种搜索,一种是index,另一种是find 这两种分别是搜索什么呢?

1个回答

/*

  • Javassist, a Java-bytecode translator toolkit.
  • Copyright (C) 1999- Shigeru Chiba. All Rights Reserved. *
  • The contents of this file are subject to the Mozilla Public License Version
  • 1.1 (the "License"); you may not use this file except in compliance with
  • the License. Alternatively, the contents of this file may be used under
  • the terms of the GNU Lesser General Public License Version 2.1 or later,
  • or the Apache License Version 2.0. *
  • Software distributed under the License is distributed on an "AS IS" basis,
  • WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  • for the specific language governing rights and limitations under the
  • License. */

package javassist.expr;

import javassist.*;
import javassist.bytecode.*;
import javassist.compiler.*;
import javassist.compiler.ast.ASTList;

/**

  • Instanceof operator.
    /
    public class Instanceof extends Expr {
    /
    *

    • Undocumented constructor. Do not use; internal-use only. */ protected Instanceof(int pos, CodeIterator i, CtClass declaring, MethodInfo m) { super(pos, i, declaring, m); }

    /**

    • Returns the method or constructor containing the instanceof
    • expression represented by this object. */ public CtBehavior where() { return super.where(); }

    /**

    • Returns the line number of the source line containing the
    • instanceof expression. *
    • @return -1 if this information is not available. */ public int getLineNumber() { return super.getLineNumber(); }

    /**

    • Returns the source file containing the
    • instanceof expression. *
    • @return null if this information is not available. */ public String getFileName() { return super.getFileName(); }

    /**

    • Returns the CtClass object representing
    • the type name on the right hand side
    • of the instanceof operator. */ public CtClass getType() throws NotFoundException { ConstPool cp = getConstPool(); int pos = currentPos; int index = iterator.u16bitAt(pos + 1); String name = cp.getClassInfo(index); return thisClass.getClassPool().getCtClass(name); }

    /**

    • Returns the list of exceptions that the expression may throw.
    • This list includes both the exceptions that the try-catch statements
    • including the expression can catch and the exceptions that
    • the throws declaration allows the method to throw. */ public CtClass[] mayThrow() { return super.mayThrow(); }

    /**

    • Replaces the instanceof operator with the bytecode derived from
    • the given source text. *
    • $0 is available but the value is null. *

    • @param statement a Java statement except try-catch.
      */
      public void replace(String statement) throws CannotCompileException {
      thisClass.getClassFile(); // to call checkModify().
      ConstPool constPool = getConstPool();
      int pos = currentPos;
      int index = iterator.u16bitAt(pos + 1);

      Javac jc = new Javac(thisClass);
      ClassPool cp = thisClass.getClassPool();
      CodeAttribute ca = iterator.get();

      try {
      CtClass[] params
      = new CtClass[] { cp.get(javaLangObject) };
      CtClass retType = CtClass.booleanType;

      int paramVar = ca.getMaxLocals();
      jc.recordParams(javaLangObject, params, true, paramVar,
                      withinStatic());
      int retVar = jc.recordReturnType(retType, true);
      jc.recordProceed(new ProceedForInstanceof(index));
      
      // because $type is not the return type...
      jc.recordType(getType());
      
      /* Is $_ included in the source code?
       */
      checkResultValue(retType, statement);
      
      Bytecode bytecode = jc.getBytecode();
      storeStack(params, true, paramVar, bytecode);
      jc.recordLocalVariables(ca, pos);
      
      bytecode.addConstZero(retType);
      bytecode.addStore(retVar, retType);     // initialize $_
      
      jc.compileStmnt(statement);
      bytecode.addLoad(retVar, retType);
      
      replace0(pos, bytecode, 3);
      

      }
      catch (CompileError e) { throw new CannotCompileException(e); }
      catch (NotFoundException e) { throw new CannotCompileException(e); }
      catch (BadBytecode e) {
      throw new CannotCompileException("broken method");
      }
      }

    /* boolean $proceed(Object obj)
    */
    static class ProceedForInstanceof implements ProceedHandler {
    int index;

    ProceedForInstanceof(int i) {
        index = i;
    }
    
    public void doit(JvstCodeGen gen, Bytecode bytecode, ASTList args)
        throws CompileError
    {
        if (gen.getMethodArgsLength(args) != 1)
            throw new CompileError(Javac.proceedName
                    + "() cannot take more than one parameter "
                    + "for instanceof");
    
        gen.atMethodArgs(args, new int[1], new int[1], new String[1]);
        bytecode.addOpcode(Opcode.INSTANCEOF);
        bytecode.addIndex(index);
        gen.setType(CtClass.booleanType);
    }
    
    public void setReturnType(JvstTypeChecker c, ASTList args)
        throws CompileError
    {
        c.atMethodArgs(args, new int[1], new int[1], new String[1]);
        c.setType(CtClass.booleanType);
    }
    

    }
    }

Pfeffer
Pfeffer 能把文件的位置告诉我吗
大约 2 年之前 回复
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500分寻求一个效果,找了半天没找到.
效果如下面网址所演示的那样。必须是循环无间断的。网上的,都是有间断的。rn如果分不够,可以再加.rnrnhttp://www.flasherclub.com/admin/manage/newsadmin/pub_dir/UploadFiles/200451322232353.swf
半天也没找到ERWin的中文资料, 谁有?
发到: wsgarden@163.comrnrnthx
搜索了半天没找到解释,高手来帮忙。
程序遭遇内存AV。想问下,rnAccess violation at address rnin module rnRead/Write of address rn第1个地址是偏移量,很好理解。rn想问一下,第2个地址是什么意思?rn另外,Read/Write有什么区别!!
这是标题啊,找了半天没找到
这里写自定义目录标题学以致用悟寻龙破而后立训练学习什么不重要,重要的是找到问题干掉它幸福是什么做好公司的一颗螺丝钉创作开发健康博文在瞎写嘛?主题呢?团队协作干项目插入链接与图片KaTeX数学公式新的甘特图功能,丰富你的文章UML 图表FLowchart流程图导出与导入导出导入 学以致用 太极:学以致用 两仪:效率、产品(产能、产出) 三才:生活、工作、价值(成就感、喜悦感、幸福感) 四象:太阴、太...
有关 “总线” 问题,找了半天也没找到。
ISA,STD,MCA,EISA,VESA,PCI,这些总线中,哪些是串行的?哪些是并行的?串行,并行总线有什么区别?rnrn 小弟不才,找了半天也没找到,恳请学长多指点!!!
看了半天的帮助没找到方法,急了!
从别人的动态库里读到一个BMP结构的的位图数据(能得到的是BMP里的文件头、位图信息头、rn调色板和位图数据中的最后一部分位图数据) 我怎么通过BITMAP把图象还原出来放到IMAGE上?
网上搜索了半天居然没找到这个软件!
是个做无盘用到的,3Com DABS 1.01(dabs101_install.exe).在3COM主页都没找到.有谁能发个给我吗?langlu_zhuo@163.com
最基本的行转列问题,找了半天也没找到
表TestrnYear_rep Item_name moneyrn2004 项目一 100.00rn2004 项目二 200.00rn2005 项目一 300.00rnrn项目 2004 2005rn项目一 100.00 300.00rn项目二 200.00 0rnrn
SQLSERVER JDBC在哪找啊。我想要
SQLSERVER JDBC在哪找啊。我想要
java.long.* ;java.util.* 在哪呢? 也就是java基础类在哪?? 找jdk没找到 !!
java.long.* ;java.util.* 这些类在哪呢? 也就是java基础类在哪?? 找jdk没找到 !!
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