[Gambas-user] Edit XML

[Caveat]

Hi Benoit,

Yes, indeed this provides a "simple XML interface".

The project is attached herewith.  I've tried to make the documentation
as complete as possible.

Regards,
Caveat

On Mon, 2010-11-22 at 11:25 +0100, Benoît Minisini wrote:
> > Hi Fabien
> > 
> > The code I have written acts as a kind of generic interface between the
> > existing Gambas XMLReader and XMLWriter.  The question is, does this go
> > some way to "completing xmldoc"?
> > 
> > The code consists of:
> > XMLParserToModel
> > XMLContainer
> > XMLRewriter
> > 
> > The important thing to note here is that my XMLParserToModel should be
> > able to read *ANY* XML and create an internal model of it, in a set of
> > XMLContainers.  I have tried it with hand-written XML, and with examples
> > from t'internet.
> > 
> > The XMLContainer object I've created is capable of holding a
> > hierarchical structure with XMLContainers that themselves hold
> > Collections of XMLContainer objects.  Each XMLContainer also holds the
> > Node Text (if applicable) and any Attributes for that Node.  When
> > created, an XMLContainer knows its parent XMLContainer but as the object
> > model is built, the XMLContainers morph into children of their parents.
> > 
> > The XMLRewriter is really just a demonstration class to show how, using
> > the XMLParserToModel to build a model of your XML and the XMLContainer's
> > built-in searching to inspect and alter your XML, you can create edits
> > which alter specific elements of your original XML.  Any changed XML can
> > be seen as a String (use toXMLString on an XMLContainer) or written to a
> > new XML file (use writeXML in the XMLRewriter class, which calls out to
> > writeSelf on the root XMLContainer).
> > 
> > Here's a transcript of a session paying with the new objects, I think
> > they are quite powerful.  Remember there's NO code in the 3 classes
> > described above that knows anything about orders or priorities, or CDs
> > or catalogs, or heroes or villains etc.
> > 
> > *************** Provide some sample XML as a String ***************
> > inputString = <?xml version="1.0"
> > encoding="ISO-8859-1"?><?xml-stylesheet type = "text/css" href =
> > "cd_catalog.css"?><all_orders><order
> > priority="rush"><id>20101120123</id><desc>rubber
> > duck</desc></order><order priority="normal"><id>20101120123</id><desc>s
> > ponge</desc></order></all_orders>
> > *************** Now parse the XML *********************************
> > parserToModel.parseInputString(inputString)
> > *************** Get the model out of the parserToModel object and ask it
> > to represent itself as XML ***************
> > parserToModel.getModel().toXMLString()
> > 
> > <all_orders>
> > <order priority="rush">
> > <id>20101120123</id>
> > <desc>rubber duck</desc></order>
> > <order priority="normal">
> > <id>20101120123</id>
> > <desc>sponge</desc></order></all_orders>
> > ***************************************************************************
> > ****************************************
> > 
> > *************** Now read sample XML from a file (from
> > http://www.w3schools.com/xml/cd_catalog.xml) ***************
> > parserToModel.parseInputFile(User.Home &/ "dev" &/ "cd_catalog.xml")
> > *************** Pick out the Node(s) containing an ARTIST text entity
> > with the text Kim Larsen ***************
> > parserToModel.getModel().findSuperNodesByText("Kim Larsen", "ARTIST",
> > selectArtists, NULL)
> > *************** Ask them to represent themselves as XML strings
> > ***************
> > FOR EACH selectArtists
> >   PRINT selectArtists[selectArtists.Key].toXMLString()
> > NEXT
> > 
> > <CD>
> > <TITLE>Midt om natten</TITLE>
> > <ARTIST>Kim Larsen</ARTIST>
> > <COUNTRY>EU</COUNTRY>
> > <COMPANY>Medley</COMPANY>
> > <PRICE>7.80</PRICE>
> > <YEAR>1983</YEAR></CD>
> > ***************************************************************************
> > **** *************** Pick out the Node(s) containing a COUNTRY text entity
> > with the text EU ***************
> > parserToModel.getModel().findSuperNodesByText("EU", "COUNTRY",
> > selectArtists, NULL)
> > *************** Ask them to represent themselves as XML strings
> > ***************
> > FOR EACH selectArtists
> >   PRINT selectArtists[selectArtists.Key].toXMLString()
> > NEXT
> > 
> > <CD>
> > <TITLE>Eros</TITLE>
> > <ARTIST>Eros Ramazzotti</ARTIST>
> > <COUNTRY>EU</COUNTRY>
> > <COMPANY>BMG</COMPANY>
> > <PRICE>9.90</PRICE>
> > <YEAR>1997</YEAR></CD>
> > 
> > <CD>
> > <TITLE>Romanza</TITLE>
> > <ARTIST>Andrea Bocelli</ARTIST>
> > <COUNTRY>EU</COUNTRY>
> > <COMPANY>Polydor</COMPANY>
> > <PRICE>10.80</PRICE>
> > <YEAR>1996</YEAR></CD>
> > 
> > <CD>
> > <TITLE>Black angel</TITLE>
> > <ARTIST>Savage Rose</ARTIST>
> > <COUNTRY>EU</COUNTRY>
> > <COMPANY>Mega</COMPANY>
> > <PRICE>10.90</PRICE>
> > <YEAR>1995</YEAR></CD>
> > 
> > <CD>
> > <TITLE>Midt om natten</TITLE>
> > <ARTIST>Kim Larsen</ARTIST>
> > <COUNTRY>EU</COUNTRY>
> > <COMPANY>Medley</COMPANY>
> > <PRICE>7.80</PRICE>
> > <YEAR>1983</YEAR></CD>
> > 
> > <CD>
> > <TITLE>Picture book</TITLE>
> > <ARTIST>Simply Red</ARTIST>
> > <COUNTRY>EU</COUNTRY>
> > <COMPANY>Elektra</COMPANY>
> > <PRICE>7.20</PRICE>
> > <YEAR>1985</YEAR></CD>
> > ***************************************************************************
> > **** **************************************************************
> > *************** Read the original Heroes input XML (See
> > http://pastebin.com/aR11N5uc) ***************
> > parserToModel.parseInputFile(User.home &/ "Heroes.xml")
> > *************** Look at the original XML we have in our internal data
> > model ***************
> > parserToModel.getModel().toXMLString()
> > 
> > <all_characters>
> > <characters series="Heroes">
> > <heroe id="1", name="Claire Bennet">
> > <name>Claire Bennet</name>
> > <played_by>Hayden Panettiere</played_by>
> > <ability>Rapid cellular regeneration</ability></heroe>
> > <heroe id="2", name="Hiro Nakamura">
> > <name>Hiro Nakamura</name>
> > <played_by>Masi Oka</played_by>
> > <ability>Space-time manipulation: teleportation & time
> > travel</ability></heroe>
> > <villain id="1", name=" Gabriel Sylar">
> > <name>Gabriel Sylar</name>
> > <played_by>Zachary Quinto</played_by>
> > <ability>Understand how things work and multiple other abilities
> > acquired</ability></villain></characters>
> > <characters series="Banana Splits">
> > <heroe id="1", name="Graham">
> > <name>Graham</name>
> > <played_by>Graham Bell</played_by>
> > <ability>Being silly</ability></heroe>
> > <heroe id="2", name="Bill">
> > <name>Bill</name>
> > <played_by>Bill Odie</played_by>
> > <ability>Being very silly</ability></heroe>
> > <heroe id="3", name="Tim">
> > <name>Tim</name>
> > <played_by>Tim Brook Taylor</played_by>
> > <ability>Being very very
> > silly</ability></heroe></characters></all_characters>
> > ***************************************************************************
> > **************** *************** All existing Text Entities
> > in /all_characters/characters/heroe/name with current value "Claire
> > Bennet" will be updated to "Banana Pudding" ***************
> > rewriter.updateTextByPath("/all_characters/characters/heroe/name",
> > "Claire Bennet", "Banana Pudding")
> > *************** All existing Text Entities
> > in /all_characters/characters/villain/played_by will be updated to
> > "Someone evil" regardless of the current content
> > rewriter.updateTextByPath("/all_characters/characters/villain/played_by",
> > NULL, "Someone evil") *************** All Text Entities with the value
> > "Being silly" get updated to "Being a complete donut brain"
> > rewriter.updateTextByValue("Being silly", "Being a complete donut
> > brain")
> > *************** Change the value of the attribute named "id" to "h1" on
> > all Entities having an Attribute named "name" with a value of "Claire
> > Bennet"
> > rewriter.changeAttribute("/all_characters/characters/heroe", "name",
> > "Claire Bennet", "id", "h1")
> > *************** Change the value of the attribute named "id" to "h2" on
> > all Entities having an Attribute named "name" with a value of "Hiro
> > Nakamura"
> > rewriter.changeAttribute("/all_characters/characters/heroe", "name",
> > "Hiro Nakamura", "id", "h2")
> > *************** First correct a fault in the XML (Attribute called
> > "name" has an erroneous space at the front of the value)
> > *************** So this will change the value of the Attribute named
> > "name" to "Gabriel Sylar" on all Entities having an Attribute named
> > "name" with a value of " Gabriel Sylar" (note the leading space)
> > rewriter.changeAttribute("/all_characters/characters/villain", "name", "
> > Gabriel Sylar", "name", "Gabriel Sylar")
> > *************** Now continue updating the ids
> > *************** Write out the new XML from the changed internal data
> > model (See http://pastebin.com/T0S96xiS)
> > rewriter.writeXML(User.home &/ "dev" &/ "NewHeroes.xml", TRUE, "UTF-8")
> > *************** Look at the new XML from the changed internal data model
> > ***************
> > parserToModel.getModel().toXMLString()
> > 
> > <all_characters>
> > <characters series="Heroes">
> > <heroe id="h1", name="Claire Bennet">
> > <name>Banana Pudding</name>
> > <played_by>Hayden Panettiere</played_by>
> > <ability>Rapid cellular regeneration</ability></heroe>
> > <heroe id="h2", name="Hiro Nakamura">
> > <name>Hiro Nakamura</name>
> > <played_by>Masi Oka</played_by>
> > <ability>Space-time manipulation: teleportation & time
> > travel</ability></heroe>
> > <villain id="v1", name="Gabriel Sylar">
> > <name>Gabriel Sylar</name>
> > <played_by>Someone evil</played_by>
> > <ability>Understand how things work and multiple other abilities
> > acquired</ability></villain></characters>
> > <characters series="Banana Splits">
> > <heroe id="b1", name="Graham">
> > <name>Graham</name>
> > <played_by>Graham Bell</played_by>
> > <ability>Being a complete donut brain</ability></heroe>
> > <heroe id="b2", name="Bill">
> > <name>Bill</name>
> > <played_by>Bill Odie</played_by>
> > <ability>Being very silly</ability></heroe>
> > <heroe id="b3", name="Tim">
> > <name>Tim</name>
> > <played_by>Tim Brook Taylor</played_by>
> > <ability>Being very very
> > silly</ability></heroe></characters></all_characters>
> > ***************************************************************************
> > *************
> > 
> > Let me know whether you think this approach is worth pursuing...
> > 
> > Regards,
> > Caveat
> > 
> 
> It is sort of a "simple XML interface" ?
> 

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