(Objective-C) XML Sort by Content

Demonstrates the SortByContent method.

The input XML, available at http://www.chilkatsoft.com/data/fruitSort2.xml, is this:

<root>
    <fruits>
        <apples>
            <apple>fuji</apple>
            <apple>gala</apple>
            <apple>granny smith</apple>
            <apple>honeycrisp</apple>
            <apple>mcintosh</apple>
        </apples>
        <fruit>banana</fruit>
        <fruit>blackberry</fruit>
        <fruit>blueberry</fruit>
        <fruit>orange</fruit>
        <fruit>pear</fruit>
    </fruits>
</root>

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#import <CkoXml.h>

CkoXml *xml = [[CkoXml alloc] init];
CkoXml *xSortRoot = 0;

BOOL success;
// The sample input XML is available at http://www.chilkatsoft.com/data/fruitSort2.xml
success = [xml LoadXmlFile: @"fruitSort2.xml"];
if (success != YES) {
    NSLog(@"%@",xml.LastErrorText);
    return;
}

// Sort the direct children under the "fruits" node by tag:
xSortRoot = [xml FindChild: @"fruits"];

// Sort in ascending order.
BOOL bAscending = YES;
[xSortRoot SortByContent: bAscending];

// Show the result:
NSLog(@"%@",[xml GetXml]);

// Note:  The "apples" node contains child nodes, but its 
// text content is 0-length (empty).  Therefore, when sorting in
// ascending order, it will be positioned before the direct
// children containing non-empty content.

// <root>
//     <fruits>
//         <apples>
//             <apple>granny smith</apple>
//             <apple>gala</apple>
//             <apple>fuji</apple>
//             <apple>mcintosh</apple>
//             <apple>honeycrisp</apple>
//         </apples>
//         <fruit>banana</fruit>
//         <fruit>blackberry</fruit>
//         <fruit>blueberry</fruit>
//         <fruit>orange</fruit>
//         <fruit>pear</fruit>
//     </fruits>
// </root>

// Sort the direct children under the "apples" node:
success = [xSortRoot FindChild2: @"apples"];

[xSortRoot SortByContent: bAscending];
NSLog(@"%@",[xml GetXml]);

// <root>
//     <fruits>
//         <apples>
//             <apple>fuji</apple>
//             <apple>gala</apple>
//             <apple>granny smith</apple>
//             <apple>honeycrisp</apple>
//             <apple>mcintosh</apple>
//         </apples>
//         <fruit>banana</fruit>
//         <fruit>blackberry</fruit>
//         <fruit>blueberry</fruit>
//         <fruit>orange</fruit>
//         <fruit>pear</fruit>
//     </fruits>
// </root>