General mechanism for mapping an XML node to an S4 object

This generic function and its methods recursively process an XML node and its child nodes ( and theirs and so on) to map the nodes to S4 objects.

This is the run-time function that corresponds to the makeClassTemplate function.

xmlToS4(node, obj = new(xmlName(node)), ...)

Arguments

node

the top-level XML node to convert to an S4 object

obj

the object whose slots are to be filled from the information in the XML node

...

additional parameters for methods

Value

The object obj whose slots have been modified.

Author

Duncan Temple Lang

See also

makeClassTemplate

Examples

 txt = paste0("<doc><part><name>ABC</name><type>XYZ</type>',
              <cost>3.54</cost><status>available</status></part></doc>")
 doc = xmlParse(txt)

 setClass("part", representation(name = "character",
                                 type = "character",
                                 cost = "numeric",
                                 status= "character"))
 xmlToS4(xmlRoot(doc)[["part"]])
#> An object of class "part"
#> Slot "name":
#> [1] "ABC"
#> 
#> Slot "type":
#> [1] "XYZ"
#> 
#> Slot "cost":
#> [1] 3.54
#> 
#> Slot "status":
#> [1] "available"
#>