Blackberry HttpConnection Connector.open modes

This may be a stupid question, however I've never really put much thought into the purpose of a connector mode and just used the default (READ_WRITE). What are the differences between calling Connector.open with its three different modes.

1) Connector.READ 2)开发者_StackOverflow社区 Connector.WRITE 3) Connector.READ_WRITE (Really only 1/2 since this is obviously both)

Also, what does the "Set end to end required/desired" mean. I am fairly sure I know but the documentation is hazy.

Thanks

What are the differences between calling Connector.open with its three different modes.

Obviously you can not write to connection if it's opened with Connector.READ and vice versa.

There's also another point, check this: Maximum number of simultaneous connections. I remember I read somewhere that when you use Connector.READ_WRITE, then system uses 2 connection handles versus the only.

Also, what does the "Set end to end required/desired" mean.

Sorry, not sure what you mean here.

UPDATE:

Also, what does the "Set end to end required/desired" mean.

Check the API for javax.microedition.io.Connector. It was used by all developers before RIM rolled out the ConnectionFactory in API 5.0. There is an explanation about end-to-end flag:

TLS connections SSL or TLS can be set up in one of two modes:
1. Proxy mode
2. End-to-end mode

For example if u perform file operation.Connector.READ- is used to only read from file,Connector.WRITE-is used to write to file,Connector.READ_WRITE-is used read as well as write into file.