javassist.bytecode.Bytecode.<init>()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中javassist.bytecode.Bytecode.<init>()方法的一些代码示例，展示了Bytecode.<init>()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Bytecode.<init>()方法的具体详情如下：
包路径：javassist.bytecode.Bytecode
类名称：Bytecode
方法名：<init>

Bytecode.<init>介绍

[英]Constructs a Bytecode object with an empty bytecode sequence. The initial values of max_stack and max_locals are zero.
[中]用空字节码序列构造Bytecode对象。max_stack和max_locals的初始值为零。

代码示例

代码示例来源：origin: redisson/redisson

/**
 * Constructs a compiler.
 *
 * @param thisClass         the class that a compiled method/field
 *                          belongs to.
 */
public Javac(CtClass thisClass) {
  this(new Bytecode(thisClass.getClassFile2().getConstPool(), 0, 0),
     thisClass);
}

代码示例来源：origin: redisson/redisson

protected void makeCode(CtClass[] paramTypes, ConstPool cp) {
  Bytecode save = new Bytecode(cp, 0, 0);
  Bytecode load = new Bytecode(cp, 0, 0);
  int var = maxLocals;
  int len = (paramTypes == null) ? 0 : paramTypes.length;
  load.addAload(var);
  makeCode2(save, load, 0, len, paramTypes, var + 1);
  save.addAstore(var);
  saveCode = save.get();
  loadCode = load.get();
}

代码示例来源：origin: org.javassist/javassist

/**
 * Constructs a compiler.
 *
 * @param thisClass         the class that a compiled method/field
 *                          belongs to.
 */
public Javac(CtClass thisClass) {
  this(new Bytecode(thisClass.getClassFile2().getConstPool(), 0, 0),
     thisClass);
}

代码示例来源：origin: org.javassist/javassist

protected void makeCode(CtClass[] paramTypes, ConstPool cp) {
  Bytecode save = new Bytecode(cp, 0, 0);
  Bytecode load = new Bytecode(cp, 0, 0);
  int var = maxLocals;
  int len = (paramTypes == null) ? 0 : paramTypes.length;
  load.addAload(var);
  makeCode2(save, load, 0, len, paramTypes, var + 1);
  save.addAstore(var);
  saveCode = save.get();
  loadCode = load.get();
}

代码示例来源：origin: redisson/redisson

private MethodInfo makeDelegator(Method meth, String desc,
      ConstPool cp, Class declClass, String delegatorName) {
  MethodInfo delegator = new MethodInfo(cp, delegatorName, desc);
  delegator.setAccessFlags(Modifier.FINAL | Modifier.PUBLIC
      | (meth.getModifiers() & ~(Modifier.PRIVATE
                    | Modifier.PROTECTED
                    | Modifier.ABSTRACT
                    | Modifier.NATIVE
                    | Modifier.SYNCHRONIZED)));
  setThrows(delegator, cp, meth);
  Bytecode code = new Bytecode(cp, 0, 0);
  code.addAload(0);
  int s = addLoadParameters(code, meth.getParameterTypes(), 1);
  Class targetClass = invokespecialTarget(declClass);
  code.addInvokespecial(targetClass.isInterface(), cp.addClassInfo(targetClass.getName()),
             meth.getName(), desc);
  addReturn(code, meth.getReturnType());
  code.setMaxLocals(++s);
  delegator.setCodeAttribute(code.toCodeAttribute());
  return delegator;
}

代码示例来源：origin: redisson/redisson

public CtConstructor makeClassInitializer()
  throws CannotCompileException
{
  CtConstructor clinit = getClassInitializer();
  if (clinit != null)
    return clinit;
  checkModify();
  ClassFile cf = getClassFile2();
  Bytecode code = new Bytecode(cf.getConstPool(), 0, 0);
  modifyClassConstructor(cf, code, 0, 0);
  return getClassInitializer();
}

代码示例来源：origin: redisson/redisson

static Bytecode makeBody(CtClass clazz, ClassFile classfile,
             CtMethod wrappedBody,
             CtClass[] parameters,
             CtClass returnType,
             ConstParameter cparam)
  throws CannotCompileException
{
  boolean isStatic = Modifier.isStatic(wrappedBody.getModifiers());
  Bytecode code = new Bytecode(classfile.getConstPool(), 0, 0);
  int stacksize = makeBody0(clazz, classfile, wrappedBody, isStatic,
               parameters, returnType, cparam, code);
  code.setMaxStack(stacksize);
  code.setMaxLocals(isStatic, parameters, 0);
  return code;
}

代码示例来源：origin: redisson/redisson

private static void addGetter(String classname, ClassFile cf, ConstPool cp)
  throws CannotCompileException
{
  MethodInfo minfo = new MethodInfo(cp, HANDLER_GETTER,
                   HANDLER_GETTER_TYPE);
  minfo.setAccessFlags(AccessFlag.PUBLIC);
  Bytecode code = new Bytecode(cp, 1, 1);
  code.addAload(0);
  code.addGetfield(classname, HANDLER, HANDLER_TYPE);
  code.addOpcode(Bytecode.ARETURN);
  minfo.setCodeAttribute(code.toCodeAttribute());
  cf.addMethod(minfo);
}

代码示例来源：origin: org.javassist/javassist

@Override
public CtConstructor makeClassInitializer()
  throws CannotCompileException
{
  CtConstructor clinit = getClassInitializer();
  if (clinit != null)
    return clinit;
  checkModify();
  ClassFile cf = getClassFile2();
  Bytecode code = new Bytecode(cf.getConstPool(), 0, 0);
  modifyClassConstructor(cf, code, 0, 0);
  return getClassInitializer();
}

代码示例来源：origin: redisson/redisson

private void modifyConstructors(ClassFile cf)
  throws CannotCompileException, NotFoundException
{
  if (fieldInitializers == null)
    return;
  ConstPool cp = cf.getConstPool();
  List list = cf.getMethods();
  int n = list.size();
  for (int i = 0; i < n; ++i) {
    MethodInfo minfo = (MethodInfo)list.get(i);
    if (minfo.isConstructor()) {
      CodeAttribute codeAttr = minfo.getCodeAttribute();
      if (codeAttr != null)
        try {
          Bytecode init = new Bytecode(cp, 0,
                      codeAttr.getMaxLocals());
          CtClass[] params
            = Descriptor.getParameterTypes(
                      minfo.getDescriptor(),
                      classPool);
          int stacksize = makeFieldInitializer(init, params);
          insertAuxInitializer(codeAttr, init, stacksize);
          minfo.rebuildStackMapIf6(classPool, cf);
        }
        catch (BadBytecode e) {
          throw new CannotCompileException(e);
        }
    }
  }
}

代码示例来源：origin: org.javassist/javassist

static Bytecode makeBody(CtClass clazz, ClassFile classfile,
             CtMethod wrappedBody,
             CtClass[] parameters,
             CtClass returnType,
             ConstParameter cparam)
  throws CannotCompileException
{
  boolean isStatic = Modifier.isStatic(wrappedBody.getModifiers());
  Bytecode code = new Bytecode(classfile.getConstPool(), 0, 0);
  int stacksize = makeBody0(clazz, classfile, wrappedBody, isStatic,
               parameters, returnType, cparam, code);
  code.setMaxStack(stacksize);
  code.setMaxLocals(isStatic, parameters, 0);
  return code;
}

代码示例来源：origin: redisson/redisson

private static void addSetter(String classname, ClassFile cf, ConstPool cp)
  throws CannotCompileException
{
  MethodInfo minfo = new MethodInfo(cp, HANDLER_SETTER,
                   HANDLER_SETTER_TYPE);
  minfo.setAccessFlags(AccessFlag.PUBLIC);
  Bytecode code = new Bytecode(cp, 2, 2);
  code.addAload(0);
  code.addAload(1);
  code.addPutfield(classname, HANDLER, HANDLER_TYPE);
  code.addOpcode(Bytecode.RETURN);
  minfo.setCodeAttribute(code.toCodeAttribute());
  cf.addMethod(minfo);
}

代码示例来源：origin: hibernate/hibernate-orm

/**
 * Declares a constructor that takes no parameter.
 *
 * @param classfile The class descriptor
 *
 * @throws CannotCompileException Indicates trouble with the underlying Javassist calls
 */
private void addDefaultConstructor(ClassFile classfile) throws CannotCompileException {
  final ConstPool constPool = classfile.getConstPool();
  final String constructorSignature = "()V";
  final MethodInfo constructorMethodInfo = new MethodInfo( constPool, MethodInfo.nameInit, constructorSignature );
  final Bytecode code = new Bytecode( constPool, 0, 1 );
  // aload_0
  code.addAload( 0 );
  // invokespecial
  code.addInvokespecial( BulkAccessor.class.getName(), MethodInfo.nameInit, constructorSignature );
  // return
  code.addOpcode( Opcode.RETURN );
  constructorMethodInfo.setCodeAttribute( code.toCodeAttribute() );
  constructorMethodInfo.setAccessFlags( AccessFlag.PUBLIC );
  classfile.addMethod( constructorMethodInfo );
}

代码示例来源：origin: redisson/redisson

private void modifyClassConstructor(ClassFile cf)
  throws CannotCompileException, NotFoundException
{
  if (fieldInitializers == null)
    return;
  Bytecode code = new Bytecode(cf.getConstPool(), 0, 0);
  Javac jv = new Javac(code, this);
  int stacksize = 0;
  boolean doInit = false;
  for (FieldInitLink fi = fieldInitializers; fi != null; fi = fi.next) {
    CtField f = fi.field;
    if (Modifier.isStatic(f.getModifiers())) {
      doInit = true;
      int s = fi.init.compileIfStatic(f.getType(), f.getName(),
                      code, jv);
      if (stacksize < s)
        stacksize = s;
    }
  }
  if (doInit)    // need an initializer for static fileds.
    modifyClassConstructor(cf, code, stacksize, 0);
}

代码示例来源：origin: redisson/redisson

private static MethodInfo makeWriteReplace(ConstPool cp) {
    MethodInfo minfo = new MethodInfo(cp, "writeReplace", "()Ljava/lang/Object;");
    String[] list = new String[1];
    list[0] = "java.io.ObjectStreamException";
    ExceptionsAttribute ea = new ExceptionsAttribute(cp);
    ea.setExceptions(list);
    minfo.setExceptionsAttribute(ea);
    Bytecode code = new Bytecode(cp, 0, 1);
    code.addAload(0);
    code.addInvokestatic("javassist.util.proxy.RuntimeSupport",
               "makeSerializedProxy",
               "(Ljava/lang/Object;)Ljavassist/util/proxy/SerializedProxy;");
    code.addOpcode(Opcode.ARETURN);
    minfo.setCodeAttribute(code.toCodeAttribute());
    return minfo;
  }
}

代码示例来源：origin: org.javassist/javassist

private static void addGetter(String classname, ClassFile cf, ConstPool cp)
  throws CannotCompileException
{
  MethodInfo minfo = new MethodInfo(cp, HANDLER_GETTER,
                   HANDLER_GETTER_TYPE);
  minfo.setAccessFlags(AccessFlag.PUBLIC);
  Bytecode code = new Bytecode(cp, 1, 1);
  code.addAload(0);
  code.addGetfield(classname, HANDLER, HANDLER_TYPE);
  code.addOpcode(Bytecode.ARETURN);
  minfo.setCodeAttribute(code.toCodeAttribute());
  cf.addMethod(minfo);
}

代码示例来源：origin: org.javassist/javassist

private static void addSetter(String classname, ClassFile cf, ConstPool cp)
  throws CannotCompileException
{
  MethodInfo minfo = new MethodInfo(cp, HANDLER_SETTER,
                   HANDLER_SETTER_TYPE);
  minfo.setAccessFlags(AccessFlag.PUBLIC);
  Bytecode code = new Bytecode(cp, 2, 2);
  code.addAload(0);
  code.addAload(1);
  code.addPutfield(classname, HANDLER, HANDLER_TYPE);
  code.addOpcode(Bytecode.RETURN);
  minfo.setCodeAttribute(code.toCodeAttribute());
  cf.addMethod(minfo);
}

代码示例来源：origin: org.javassist/javassist

private static MethodInfo makeWriteReplace(ConstPool cp) {
    MethodInfo minfo = new MethodInfo(cp, "writeReplace", "()Ljava/lang/Object;");
    String[] list = new String[1];
    list[0] = "java.io.ObjectStreamException";
    ExceptionsAttribute ea = new ExceptionsAttribute(cp);
    ea.setExceptions(list);
    minfo.setExceptionsAttribute(ea);
    Bytecode code = new Bytecode(cp, 0, 1);
    code.addAload(0);
    code.addInvokestatic("javassist.util.proxy.RuntimeSupport",
               "makeSerializedProxy",
               "(Ljava/lang/Object;)Ljavassist/util/proxy/SerializedProxy;");
    code.addOpcode(Opcode.ARETURN);
    minfo.setCodeAttribute(code.toCodeAttribute());
    return minfo;
  }
}

代码示例来源：origin: redisson/redisson

/**
 * Creates a default (public) constructor.
 *
 * <p>The created constructor takes no parameter.  It calls
 * <code>super()</code>.
 */
public static CtConstructor defaultConstructor(CtClass declaring)
  throws CannotCompileException
{
  CtConstructor cons = new CtConstructor((CtClass[])null, declaring);
  ConstPool cp = declaring.getClassFile2().getConstPool();
  Bytecode code = new Bytecode(cp, 1, 1);
  code.addAload(0);
  try {
    code.addInvokespecial(declaring.getSuperclass(),
               "<init>", "()V");
  }
  catch (NotFoundException e) {
    throw new CannotCompileException(e);
  }
  code.add(Bytecode.RETURN);
  // no need to construct a stack map table.
  cons.getMethodInfo2().setCodeAttribute(code.toCodeAttribute());
  return cons;
}

代码示例来源：origin: redisson/redisson

(ExceptionsAttribute)eattr.copy(cp, null));
Bytecode code = new Bytecode(cp, 0, 0);
boolean isStatic = Modifier.isStatic(delegate.getModifiers());
CtClass deleClass = delegate.getDeclaringClass();

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