Thank you. So can you provide me with a snippet that has a String to be sent
and then read back for example:
String alfa = ..... write the GeoJSON
then I send alfa as a string over the network
String beta = received string
String result = read beta as GeoJSON ?
I would appreciate it if you could help me in this :)
On Mon, May 2, 2011 at 4:13 AM, Jody Garnett <[email protected]> wrote:
> I think you may want to back up and think about what is involved in
> transfer over the network. We are focused on the spatial side of the
> problem; as such we can give you code snippets that show how to use these
> geospatial classes with normal Java facilities such as a Writer and Reader.
>
> However what is involved to transfer over the network? Only you know what
> you are doing for your application; personally I try to use Spring remoting;
> you may be working with SOAP? Or perhaps just Java HTTP support? I am not
> sure ...
>
> But yes Reader and Writer allow you to write to and from a Java String
> (when using StringWriter and StringReader). If that helps you so much the
> better; if your choice of remoting software allows you to accept an stream
> of input then it is often preferable to use a Reader directly (so you that
> you can display results to your users as contents are read in).
>
> --
> Jody Garnett
>
> On Saturday, 30 April 2011 at 5:09 AM, mounir younes wrote:
>
> Also if someone can help me figure out what happens after reading and
> writing geoJSON ! is features simply transformed into strings? and then when
> read new features with the attributes read are being built ?
>
> So can I simply implement my own format and maybe send the IDs of the
> features over the network if the data is present at both ends ? Thank you
>
> On Fri, Apr 29, 2011 at 12:12 PM, mounir younes
> <[email protected]>wrote:
>
> question 1: What does the assertEquals() and strip() methods do ?
> And I want to send a feature collection with an OutputStream
> (DataOutputStream or ObjectOutputStream) so should I do the following?
>
>
> FeatureJSON fjson = new FeatureJSON();
>
> StringWriter writer = new StringWriter();
> fjson.writeFeatureCollection(collection(), writer); //question 2 - does this
> take the collection
> and return it as a string and put it in string writer ? If yes ! does this
> mean that
> I can simply send it as a string over the network ?
>
>
> at the other end what should I read and how?
> fjson.readFeatureCollection() ?
> should I implement the collectionText() method ? if yes what does the
> withBounds parameter mean ?
>
> Thank you :) I hope the answer for these questions would help others :)
>
>
> On Mon, Apr 25, 2011 at 11:34 AM, Andrea Aime <
> [email protected]> wrote:
>
> On Mon, Apr 25, 2011 at 6:13 AM, Jody Garnett <[email protected]>
> wrote:
> > The work with a java Writer; use your http connection and wrap it up as a
> > writer on one end; and a reader on the other; and use these two methods
> as
> > shown above:
> >
> > - readFeatureCollection( reader )
> >
> > - writeFeatureCollection( featureCollection, writer )
> >
> > Or send a string over the wire (using whatever remoting software you are
> > happy with ) and use a StringWriter as shown in the test case to generate
> > your string on one side; and a StringReader on the other end.
>
> To send over http you can use either commons http or use the built in Java
> abilities. If you go for the latter the bits of code in the
> resourceToStream method
> in this class might be of help (this is the receiving end, the other
> half is similar),
> in particular if the network is slow it shows how to use http 1.1 gzip
> compression
> to speed up the transfer:
>
>
> http://svn.osgeo.org/geotools/trunk/modules/unsupported/sfs/src/main/java/org/geotools/data/sfs/SFSDataStore.java
>
> Cheers
> Andrea
>
>
> --
> -------------------------------------------------------
> Ing. Andrea Aime
> GeoSolutions S.A.S.
> Tech lead
>
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
>
> phone: +39 0584 962313
> fax: +39 0584 962313
>
> http://www.geo-solutions.it
> http://geo-solutions.blogspot.com/
> http://www.youtube.com/user/GeoSolutionsIT
> http://www.linkedin.com/in/andreaaime
> http://twitter.com/geowolf
>
> -------------------------------------------------------
>
>
>
>
>
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