Cloning ChartServer to replicate template info

[User (Legacy)]

Hi. We're thinking about using ChartFX in our product and I have a technical

question.

We want to keep templates on disk in XML. However, we dson't want to incur

the hit of reading the XML from disk and parsing it every time we want to

create a chart. My idea is to create a single ChartServer and read in the

XML once and then store it in session (we're in J2EE). Then, when we want to

create a map, clone() the ChartServer, set the data and other variable

properties, and create a chart. Will this work? Is there a better solution?

Thanks,

Derek Richardson

Appian Corporation

[User (Legacy)]

> create a map, clone() the ChartServer, set the data and other variable

Whoops, "map" should be "chart"

"Derek Richardson" <derek.richardson@appiancorp.com> wrote in message

news:unEbDHZoEHA.3352@webserver3.softwarefx.com...

> Hi. We're thinking about using ChartFX in our product and I have a

technical

> question.

>

> We want to keep templates on disk in XML. However, we dson't want to incur

> the hit of reading the XML from disk and parsing it every time we want to

> create a chart. My idea is to create a single ChartServer and read in the

> XML once and then store it in session (we're in J2EE). Then, when we want

to

> create a map, clone() the ChartServer, set the data and other variable

> properties, and create a chart. Will this work? Is there a better

solution?

>

> Thanks,

>

> Derek Richardson

> Appian Corporation

>

>

[Software FX]

Dear Derek,

Cloning is not the best solution for you.

Niether do we work well on the native java serialize engine (Externalizable, 

Serializeable...).

The best thing for you to do is use the internal serialize option within 

chartfx.

The way you do this is very simple:

Using the CFX for Java export function export to a binary stream and save 

that stream in session as you suggest.

Then create a new ChartServer object, seek to the beginning of the stream

and then use the import form a binary stream and boom you have your state 

restored.

Pseudo Code:

  ByteArrayOutputStream outStream = new ByteArrayOutputStream();

  _chart.exportChart(FileFormat.BINARY, outStream);

  outStream.close();

  byte [] byteArray  = outStream.toByteArray();

// store this byteArray for later then issue import!

  ByteArrayInputStream inStream = new ByteArrayInputStream(byteArray);

  _chart.importChart(FileFormat.BINARY, inStream);

Before issuing the import/export you might want to only export certain 

information. Please see the FileMask API.

-cjs

"Derek Richardson" <derek.richardson@appiancorp.com> wrote in message 

news:unEbDHZoEHA.3352@webserver3.softwarefx.com...

> Hi. We're thinking about using ChartFX in our product and I have a 

> technical

> question.

>

> We want to keep templates on disk in XML. However, we dson't want to incur

> the hit of reading the XML from disk and parsing it every time we want to

> create a chart. My idea is to create a single ChartServer and read in the

> XML once and then store it in session (we're in J2EE). Then, when we want 

> to

> create a map, clone() the ChartServer, set the data and other variable

> properties, and create a chart. Will this work? Is there a better 

> solution?

>

> Thanks,

>

> Derek Richardson

> Appian Corporation

>

>