| private GetConstantPoolConstantType ( int index ) : ConstantType | ||
| index | int | |
| Résultat | ConstantType | |
private static bool IsLambdaAltMetafactory(ClassFile classFile, ClassFile.BootstrapMethod bsm)
{
ClassFile.ConstantPoolItemMethodHandle mh;
AltFlags flags;
int argpos = 4;
return bsm.ArgumentCount >= 4
&& (mh = classFile.GetConstantPoolConstantMethodHandle(bsm.BootstrapMethodIndex)).Kind == ClassFile.RefKind.invokeStatic
&& mh.Member != null
&& IsLambdaAltMetafactory(mh.Member)
&& classFile.GetConstantPoolConstantType(bsm.GetArgument(0)) == ClassFile.ConstantType.MethodType
&& classFile.GetConstantPoolConstantType(bsm.GetArgument(1)) == ClassFile.ConstantType.MethodHandle
&& classFile.GetConstantPoolConstantType(bsm.GetArgument(2)) == ClassFile.ConstantType.MethodType
&& classFile.GetConstantPoolConstantType(bsm.GetArgument(3)) == ClassFile.ConstantType.Integer
&& ((flags = (AltFlags)classFile.GetConstantPoolConstantInteger(bsm.GetArgument(3))) & ~AltFlags.Mask) == 0
&& ((flags & AltFlags.Markers) == 0 || CheckOptionalArgs(classFile, bsm, ClassFile.ConstantType.Class, ref argpos))
&& ((flags & AltFlags.Bridges) == 0 || CheckOptionalArgs(classFile, bsm, ClassFile.ConstantType.MethodType, ref argpos))
&& argpos == bsm.ArgumentCount;
}
private static bool CheckOptionalArgs(ClassFile classFile, ClassFile.BootstrapMethod bsm, ClassFile.ConstantType type, ref int argpos)
{
if (bsm.ArgumentCount - argpos < 1)
{
return false;
}
if (classFile.GetConstantPoolConstantType(bsm.GetArgument(argpos)) != ClassFile.ConstantType.Integer)
{
return false;
}
int count = classFile.GetConstantPoolConstantInteger(bsm.GetArgument(argpos++));
if (count < 0 || bsm.ArgumentCount - argpos < count)
{
return false;
}
for (int i = 0; i < count; i++)
{
if (classFile.GetConstantPoolConstantType(bsm.GetArgument(argpos++)) != type)
{
return false;
}
}
return true;
}
private static bool IsLambdaMetafactory(ClassFile classFile, ClassFile.BootstrapMethod bsm)
{
ClassFile.ConstantPoolItemMethodHandle mh;
return bsm.ArgumentCount == 3
&& classFile.GetConstantPoolConstantType(bsm.GetArgument(0)) == ClassFile.ConstantType.MethodType
&& classFile.GetConstantPoolConstantType(bsm.GetArgument(1)) == ClassFile.ConstantType.MethodHandle
&& classFile.GetConstantPoolConstantType(bsm.GetArgument(2)) == ClassFile.ConstantType.MethodType
&& (mh = classFile.GetConstantPoolConstantMethodHandle(bsm.BootstrapMethodIndex)).Kind == ClassFile.RefKind.invokeStatic
&& mh.Member != null
&& IsLambdaMetafactory(mh.Member);
}