1.I need to transfer a complex type with an array variable member in a
Java-IDL based program. But if the array is empty, the program will
report a java.lang.NullPointerException.
Is there any solution to it except block the request in client side?
The following is my idl:
#ifndef __SAMPLE_IDL__
#define __SAMPLE_IDL__
typedef sequence <octet> ByteArray;
struct ComplexType {
ByteArray data;
string info;
};
interface Sample {
void doSomething(in ComplexType value);
};
#endif // __SAMPLE_IDL__
And the following is a snippet from the client program:
ComplexType value = new ComplexType();
// leave data field to be NULL
value.info = "Hello, World! ";
xxx.doSomething(value);
If I provide an empty data field for ComplexType, it will fail to
serialize the parameter value.
And the following is part of the autogenerated class ByteArrayHelper:
public static void write (org.omg.CORBA.portable.OutputStream
ostream, byte[] value)
{
ostream.write_long (value.length);
ostream.write_octet_array (value, 0, value.length);
}
It always throws java.lang.NullPointerException at the line:
ostream.write_long (value.length);
2.If I have another method:
void echoString(in string info);
If the client call this method with a null parameter, ORB will
complain too. But sometimes, it 's reasonable requirement. Is it any
solution to this? Redefine a method:
void echoString();
or block such kind of request by client?
There must be a better solution. But what is it?
------解决方案--------------------
好像不可以，你只能传空对象。
------解决方案--------------------
你试一下IDL类型定义为any，调试一下java和c++分别怎么处理