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Throwing errors #192

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3ac3159
Changed Document.root and Element.subscript to throwing
RCCoop Nov 9, 2025
7d95be3
Updated Unit Tests to Swift Testing
RCCoop Nov 9, 2025
44e528d
Added key to AEXMLError.elementNotFound
RCCoop Nov 9, 2025
3cb8d74
Updated demo view controller & readme
RCCoop Nov 10, 2025
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136 changes: 98 additions & 38 deletions Example/AEXMLDemo/ViewController.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -33,74 +33,134 @@ final class ViewController: UIViewController {
options.parserSettings.shouldReportNamespacePrefixes = false
options.parserSettings.shouldResolveExternalEntities = false

let xmlDoc: AEXMLDocument
let root: AEXMLElement
do {
let xmlDoc = try AEXMLDocument(xml: data, options: options)
xmlDoc = try AEXMLDocument(xml: data, options: options)
root = try xmlDoc.root
} catch {
print("Failed to parse doc and root:", error)
return
}

// prints the same XML structure as original
print(xmlDoc.xml)
// prints the same XML structure as original
print(xmlDoc.xml)

// prints cats, dogs
for child in xmlDoc.root.children {
print(child.name)
}
// prints cats, dogs
for child in root.children {
print(child.name)
}

// prints Optional("Tinna") (first element)
print(String(describing: xmlDoc.root["cats"]["cat"].value))
// prints Optional("Tinna") (first element)
do {
let tinna = try root["cats"]["cat"].value
print(String(describing: tinna))
} catch {
print(error)
}

// prints Tinna (first element)
print(xmlDoc.root["cats"]["cat"].string)
// prints Tinna (first element)
do {
let tinna = try root["cats"]["cat"].string
print(tinna)
} catch {
print(error)
}

// prints Optional("Kika") (last element)
print(String(describing: xmlDoc.root["dogs"]["dog"].last?.value))
// prints Optional("Kika") (last element)
do {
let kika = try root["dogs"]["dog"].last?.value
print(String(describing: kika))
} catch {
print(error)
}

// prints Betty (3rd element)
print(xmlDoc.root["dogs"].children[2].string)
// prints Betty (3rd element)
do {
let betty = try root["dogs"].children[2].string
print(betty)
} catch {
print(error)
}

// prints Tinna, Rose, Caesar
if let cats = xmlDoc.root["cats"]["cat"].all {
for cat in cats {
// prints Tinna, Rose, Caesar
do {
let cats = try root["cats"]["cat"]
if let allCats = cats.all {
for cat in allCats {
if let name = cat.value {
print(name)
}
}
}
} catch {
print(error)
}

// prints Villy, Spot
for dog in xmlDoc.root["dogs"]["dog"].all! {
// prints Villy, Spot
do {
let dogs = try root["dogs"]["dog"]
for dog in dogs.all! {
if let color = dog.attributes["color"] {
if color == "white" {
print(dog.string)
}
}
}
} catch {
print(error)
}

// prints Tinna
if let cats = xmlDoc.root["cats"]["cat"].all(withValue: "Tinna") {
for cat in cats {
// prints Tinna
do {
let cats = try root["cats"]["cat"]
if let tinna = cats.all(withValue: "Tinna") {
for cat in tinna {
print(cat.string)
}
}
} catch {
print(error)
}

// prints Caesar
if let cats = xmlDoc.root["cats"]["cat"].all(withAttributes: ["breed" : "Domestic", "color" : "yellow"]) {
for cat in cats {
// prints Caesar
do {
let cats = try root["cats"]["cat"]
if let caesar = cats.all(withAttributes: ["breed" : "Domestic", "color" : "yellow"]) {
for cat in caesar {
print(cat.string)
}
}
} catch {
print(error)
}

// prints 4
print(xmlDoc.root["cats"]["cat"].count)
// prints 4
do {
print(try root["cats"]["cat"].count)
} catch {
print(error)
}

// prints Siberian
print(xmlDoc.root["cats"]["cat"].attributes["breed"]!)
// prints Siberian
do {
print(try root["cats"]["cat"].attributes["breed"]!)
} catch {
print(error)
}

// prints <cat breed="Siberian" color="lightgray">Tinna</cat>
print(xmlDoc.root["cats"]["cat"].xmlCompact)
// prints <cat breed="Siberian" color="lightgray">Tinna</cat>
do {
print(try root["cats"]["cat"].xmlCompact)
} catch {
print(error)
}

// prints Optional(AEXML.AEXMLError.elementNotFound)
print(String(describing: xmlDoc["NotExistingElement"].error))
// prints Optional(AEXML.AEXMLError.elementNotFound)
do {
let _ = try xmlDoc["NotExistingElement"]
} catch {
print("\(error)")
print(error)
}
}

Expand All @@ -121,8 +181,8 @@ final class ViewController: UIViewController {
let document = try AEXMLDocument(xml: data)
var parsedText = String()
// parse known structure
for plant in document["CATALOG"]["PLANT"].all! {
parsedText += plant["COMMON"].string + "\n"
for plant in try document["CATALOG"]["PLANT"].all! {
parsedText += try plant["COMMON"].string + "\n"
}
textView.text = parsedText
} catch {
Expand Down Expand Up @@ -167,7 +227,7 @@ final class ViewController: UIViewController {
let document = try AEXMLDocument(xml: data)
var parsedText = String()
// parse unknown structure
for child in document.root.children {
for child in try document.root.children {
parsedText += child.xml + "\n"
}
textView.text = parsedText
Expand Down
161 changes: 111 additions & 50 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -63,75 +63,136 @@ guard let
let data = try? Data(contentsOf: URL(fileURLWithPath: xmlPath))
else { return }

let xmlDoc = try AEXMLDocument(xml: data, options: options)

let xmlDoc: AEXMLDocument
let root: AEXMLElement
do {
let xmlDoc = try AEXMLDocument(xml: data, options: options)

// prints the same XML structure as original
print(xmlDoc.xml)

// prints cats, dogs
for child in xmlDoc.root.children {
print(child.name)
}

// prints Optional("Tinna") (first element)
print(xmlDoc.root["cats"]["cat"].value)

// prints Tinna (first element)
print(xmlDoc.root["cats"]["cat"].string)

// prints Optional("Kika") (last element)
print(xmlDoc.root["dogs"]["dog"].last?.value)

// prints Betty (3rd element)
print(xmlDoc.root["dogs"].children[2].string)

// prints Tinna, Rose, Caesar
if let cats = xmlDoc.root["cats"]["cat"].all {
for cat in cats {
xmlDoc = try AEXMLDocument(xml: data, options: options)
root = try xmlDoc.root
} catch {
print("Failed to parse doc and root:", error)
return
}

// prints the same XML structure as original
print(xmlDoc.xml)

// prints cats, dogs
for child in root.children {
print(child.name)
}

// prints Optional("Tinna") (first element)
do {
let tinna = try root["cats"]["cat"].value
print(String(describing: tinna))
} catch {
print(error)
}

// prints Tinna (first element)
do {
let tinna = try root["cats"]["cat"].string
print(tinna)
} catch {
print(error)
}

// prints Optional("Kika") (last element)
do {
let kika = try root["dogs"]["dog"].last?.value
print(String(describing: kika))
} catch {
print(error)
}

// prints Betty (3rd element)
do {
let betty = try root["dogs"].children[2].string
print(betty)
} catch {
print(error)
}

// prints Tinna, Rose, Caesar
do {
let cats = try root["cats"]["cat"]
if let allCats = cats.all {
for cat in allCats {
if let name = cat.value {
print(name)
}
}
}

// prints Villy, Spot
for dog in xmlDoc.root["dogs"]["dog"].all! {
} catch {
print(error)
}

// prints Villy, Spot
do {
let dogs = try root["dogs"]["dog"]
for dog in dogs.all! {
if let color = dog.attributes["color"] {
if color == "white" {
print(dog.string)
}
}
}

// prints Tinna
if let cats = xmlDoc.root["cats"]["cat"].all(withValue: "Tinna") {
for cat in cats {
} catch {
print(error)
}

// prints Tinna
do {
let cats = try root["cats"]["cat"]
if let tinna = cats.all(withValue: "Tinna") {
for cat in tinna {
print(cat.string)
}
}

// prints Caesar
if let cats = xmlDoc.root["cats"]["cat"].all(withAttributes: ["breed" : "Domestic", "color" : "yellow"]) {
for cat in cats {
} catch {
print(error)
}

// prints Caesar
do {
let cats = try root["cats"]["cat"]
if let caesar = cats.all(withAttributes: ["breed" : "Domestic", "color" : "yellow"]) {
for cat in caesar {
print(cat.string)
}
}

// prints 4
print(xmlDoc.root["cats"]["cat"].count)

// prints Siberian
print(xmlDoc.root["cats"]["cat"].attributes["breed"]!)

// prints <cat breed="Siberian" color="lightgray">Tinna</cat>
print(xmlDoc.root["cats"]["cat"].xmlCompact)

// prints Optional(AEXML.AEXMLError.elementNotFound)
print(xmlDoc["NotExistingElement"].error)
} catch {
print(error)
}

// prints 4
do {
print(try root["cats"]["cat"].count)
} catch {
print(error)
}

// prints Siberian
do {
print(try root["cats"]["cat"].attributes["breed"]!)
} catch {
print(error)
}
catch {
print("\(error)")

// prints <cat breed="Siberian" color="lightgray">Tinna</cat>
do {
print(try root["cats"]["cat"].xmlCompact)
} catch {
print(error)
}

// prints Optional(AEXML.AEXMLError.elementNotFound)
do {
let _ = try xmlDoc["NotExistingElement"]
} catch {
print(error)
}
```

Expand Down
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