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# Q3NetworkOperation Class Reference
[Qt3Support module]

The Q3NetworkOperation class provides common operations for network protocols. More...

     #include <Q3NetworkOperation>

This class is part of the Qt 3 support library. It is provided to keep old source code working. We strongly advise against using it in new code. See Porting to Qt 4 for more information.

Inherits QObject.

- List of all members, including inherited members

### Public Functions

- Q3NetworkOperation ( Q3NetworkProtocol::Operation operation, const QString & arg0, const QString & arg1, const QString & arg2 )
- Q3NetworkOperation ( Q3NetworkProtocol::Operation operation, const QByteArray & arg0, const QByteArray & arg1, const QByteArray & arg2 )
- ~Q3NetworkOperation ()
- QString arg ( int num ) const
- int errorCode () const
- void free ()
- Q3NetworkProtocol::Operation operation () const
- QString protocolDetail () const
- QByteArray rawArg ( int num ) const
- void setArg ( int num, const QString & arg )
- void setErrorCode ( int ec )
- void setProtocolDetail ( const QString & detail )
- void setRawArg ( int num, const QByteArray & arg )
- void setState ( Q3NetworkProtocol::State state )
- Q3NetworkProtocol::State state () const

- 29 public functions inherited from QObject

### Additional Inherited Members

- 1 property inherited from QObject
- 1 public slot inherited from QObject
- 1 signal inherited from QObject
- 5 static public members inherited from QObject
- 7 protected functions inherited from QObject

## Detailed Description

The Q3NetworkOperation class provides common operations for network protocols.

An object is created to describe the operation and the current state for each operation that a network protocol should process.

See also Q3NetworkProtocol.

## Member Function Documentation

### Q3NetworkOperation::Q3NetworkOperation ( Q3NetworkProtocol::Operation operation, const QString & arg0, const QString & arg1, const QString & arg2 )

Constructs a network operation object. operation is the type of the operation, and arg0, arg1 and arg2 are the first three arguments of the operation. The state is initialized to Q3NetworkProtocol::StWaiting.

See also Q3NetworkProtocol::Operation and Q3NetworkProtocol::State.

### Q3NetworkOperation::Q3NetworkOperation ( Q3NetworkProtocol::Operation operation, const QByteArray & arg0, const QByteArray & arg1, const QByteArray & arg2 )

Constructs a network operation object. operation is the type of the operation, and arg0, arg1 and arg2 are the first three raw data arguments of the operation. The state is initialized to Q3NetworkProtocol::StWaiting.

See also Q3NetworkProtocol::Operation and Q3NetworkProtocol::State.

### Q3NetworkOperation::~Q3NetworkOperation ()

Destructor.

### QString Q3NetworkOperation::arg ( int num ) const

Returns the operation's num-th argument. If this argument was not already set, an empty string is returned.

See also setArg().

### int Q3NetworkOperation::errorCode () const

Returns the error code for the last error that occurred.

See also setErrorCode().

### void Q3NetworkOperation::free ()

Sets this object to delete itself when it hasn't been used for one second.

Because Q3NetworkOperation pointers are passed around a lot the Q3NetworkProtocol generally does not have enough knowledge to delete these at the correct time. If a Q3NetworkProtocol doesn't need an operation any more it will call this function instead.

Note: you should never need to call the method yourself.

### Q3NetworkProtocol::Operation Q3NetworkOperation::operation () const

Returns the type of the operation.

### QString Q3NetworkOperation::protocolDetail () const

Returns a detailed error message for the last error. This must have been set using setProtocolDetail().

See also setProtocolDetail().

### QByteArray Q3NetworkOperation::rawArg ( int num ) const

Returns the operation's num-th raw data argument. If this argument was not already set, an empty bytearray is returned.

See also setRawArg().

### void Q3NetworkOperation::setArg ( int num, const QString & arg )

Sets the network operation's num-th argument to arg.

See also arg().

### void Q3NetworkOperation::setErrorCode ( int ec )

Sets the error code to ec.

If the operation failed, the protocol should set an error code to describe the error in more detail. If possible, one of the error codes defined in Q3NetworkProtocol should be used.

See also errorCode(), setProtocolDetail(), and Q3NetworkProtocol::Error.

### void Q3NetworkOperation::setProtocolDetail ( const QString & detail )

If the operation failed, the error message can be specified as detail.

See also protocolDetail().

### void Q3NetworkOperation::setRawArg ( int num, const QByteArray & arg )

Sets the network operation's num-th raw data argument to arg.

See also rawArg().

### void Q3NetworkOperation::setState ( Q3NetworkProtocol::State state )

Sets the state of the operation object. This should be done by the network protocol during processing; at the end it should be set to Q3NetworkProtocol::StDone or Q3NetworkProtocol::StFailed, depending on success or failure.

See also state() and Q3NetworkProtocol::State.

### Q3NetworkProtocol::State Q3NetworkOperation::state () const

Returns the state of the operation. You can determine whether an operation is still waiting to be processed, is being processed, has been processed successfully, or failed.

See also setState().