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This object is used to contain an XML tree. The JavaScript equivalent is DOMParser().
The roXMLElement object is created with no parameters:
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CreateObject("roXMLElement") |
The following examples illustrate how XML elements are parsed in BrightScript:
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<tag1>This is example text</tag1> |
Name = tag1
Attributes = Invalid
Body = roString containing "This is example text"
...
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<tag2 caveman="barney"/> |
Name = tag2
Attributes = roAssociativeArray with one entry,
{caveman, barney}Body = Invalid
...
If the tag contains other tags, the body will be of type roXMLList.
To generate XML content, create an roXMLElement and call the SetBody() and SetName() methods to build it–then call the GenXML() method to generate it.
Example
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...
root.SetName("myroot")
root.AddAttribute("key1","value1")
root.AddAttribute("key2","value2")
ne=root.AddBodyElement()
ne.SetName("sub")
ne.SetBody("this is the sub1 text")
ne=root.AddBodyElement()
ne.SetName("subelement2")
ne.SetBody("more sub text")
ne.AddAttribute("k","v")
ne=root.AddElement("subelement3")
ne.SetBody("more sub text 3")
root.AddElementWithBody("sub","another sub (#4)")
PrintXML(root, 0)
print root.GenXML(false) |
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ifXMLElement
GetBody() As Object
GetAttributes() As Object
GetName() As String
GetText() As String
GetChildElements() As Object
GetNamedElements(a As String) As Object
GetNamedElementsCi(a As String) As Object
SetBody(a As Object)
Generates an roXMLList for the body if needed. The method then adds the passed item (which should be an roXMLElement tag).
AddBodyElement() As Object
AddElement(a As String) As Object
AddElementWithBody(a As String, b As Object) As Object
AddAttribute(a As String, b As String)
SetName(a As String)
Parse(a As String) As Boolean
Parses the XML content passed to it. In the event of failure, this method returns False. However, it also populates roXMLElement with whatever text could be successfully parsed. To avoid passing along erroneous strings, it is always best to have the script check the return value of Parse() before using them.
GenXML(a As
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Boolean) As String
Generates XML content. This method takes a single Boolean parameter, indicating whether or not the XML should have an <?xml …> tag at the top.
Clear() As Void
GenXMLHdr(a As String) As String
IsName(a As String) As Boolean
HasAttribute(a As String) As Boolean
ParseFile(a As String) As Boolean
...
Example
This subroutine example prints out the contents of an roXMLElement tree:
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PrintXML(root, 0)
Sub PrintXML(element As Object, depth As Integer)
print tab(depth*3);"Name: ";element.GetName()
if not element.GetAttributes().IsEmpty() then
print tab(depth*3);"Attributes: ";
for each a in element.GetAttributes()
print a;"=";left(element.GetAttributes()[a], 20);
if element.GetAttributes().IsNext() then print ", ";
end for
print
end if
if element.GetText()<>invalid then
print tab(depth*3);"Contains Text: ";left(element.GetText(), 40)
end if
if element.GetChildElements()<>invalid
print tab(depth*3);"Contains roXMLList:"
for each e in element.GetChildElements()
PrintXML(e, depth+1)
end for
end if
print
end sub |
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