XML DECODE

Home

4D v20 R7

XML

XML DECODE


XML DECODE ( xmlValue ; 4Dvar )

Parameter	Type	Description
xmlValue	Text	Text type value coming from an XML structure
4Dvar	Field, Variable	4D variable or field receiving the converted XML value

Description

The XML DECODE command converts a value stored as an XML string into a 4D typed value. The conversion is carried out automatically according to the following rules:

Value	Examples	Conversion on English system
number	<Price>8,5</Price><Price>8.5</Price>	Real: 8.5
Boolean	<Double>1</Double> <Double>0</Double> or <Double>true</Double> <Double>false</Double>	Boolean: True/False
BLOB		Base64 decoding
Picture		Base64 decoding + BLOB to picture command
Dates	2009-10-25T01:03:20+01:00	!10/25/2009! -> Deletion of time part as well as time zone
Time	2009-10-25T01:03:20+01:00	?01:03:20? -> Deletion of date part. Warning: time zone is taken into account if different from local time. For example: "2009-10-25T01:03:20+05:00" will be decoded ?21:03:20? in UTC+1 local time

If the 4Dvar parameter type is not defined, the text type is used by default.

Example

Importing data from an XML document in which values are stored as attributes.
Example of XML document:

<CD Date="2003-01-01T00:00:00Z" 
Description="This double CD reissued by EMI in 1995 combines 4 Stabat mater hymns. One by Rossini interpreted by the Berlin Symphony Orchestra, directed by Karl Forster. Followed by a work of Verdi, by the Philharmonic Orchestra, directed by Carlo Maria Giulini. On the second CD, you will find Francis Poulenc interpreted by Régine Crespin. This compilation ends with a little-known version, that of the Polish composer Karol Szymanowski. Polish National Radio Symphony Orchestra directed by Antoni Wit"
Double="true"
Duration="7246"
Type="Sacred music"
CD_ID="5" Performer="Various"
Price="8.5"
Title="4 Stabat mater"/>

 Repeat

    MyEvent:=SAX Get XML node(DocRef)

 

    Case of

       :(MyEvent=XML Start Element)

          ARRAY TEXT(arrAttrNames;0)

          ARRAY TEXT(arrAttrValues;0)

          SAX GET XML ELEMENT(DocRef;vName;vPrefix;arrAttrNames;arrAttrValues)

          If(vName="CD")

             CREATE RECORD([CD])

             For($i;1;Size of array(arrAttrNames))

                $attrName:=arrAttrNames{$i}

                Case of

                   :($attrName="CD_ID")

                      XML DECODE(arrAttrValues{$i};[CD]CD_ID)

                   :($attrName="Title")

                      [CD]Work:=arrAttrValues{$i}

                   :($attrName="Price")

                      XML DECODE(arrAttrValues{$i};[CD]Price)

                   :($attrName="Date")

                      XML DECODE(arrAttrValues{$i};[CD]Date entered)

                   :($attrName="Duration")

                      XML DECODE(arrAttrValues{$i};[CD]Total_duration)

                   :($attrName="Double")

                      XML DECODE(arrAttrValues{$i};[CD]Double_CD)

                End case

             End for

          End if

          ...

    End case

 Until(MyEvent=XML End Document)