Zig

Remove an XML Subtree

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Demonstrates how to remove an XML subtree from an XML document. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    const xml = try chilkat.Xml.init();
    defer xml.deinit();

    try xml.loadXmlFile("qa_data/xml/osszes.xml");

    // The XML file we're loading contains this:

    // <?xml version="1.0" encoding="iso-8859-2" ?>
    // <EXAMPLE>
    //     <OSSZES>
    //         <ROW TYPE="INS">477953
    //             <NUMBER>05107003972</NUMBER>
    //         </ROW>
    //         <ROW TYPE="INS">477954
    //             <NUMBER>05107001342</NUMBER>
    //         </ROW>
    //         <ROW TYPE="INS">477955
    //             <NUMBER>05107001342</NUMBER>
    //         </ROW>
    //         <ROW TYPE="INS">477956
    //             <NUMBER>05107000017</NUMBER>
    //         </ROW>**
    //         <ROW TYPE="INS">477957
    //             <NUMBER>05107002182</NUMBER>
    //         </ROW>
    //     </OSSZES>
    // </EXAMPLE>
    //

    // We wish to remove this subtree:

    // <ROW TYPE="INS">477956
    //     <NUMBER>05107000017</NUMBER>
    // </ROW>

    // Get another reference to the XML document.
    const xml2 = try xml.getSelf();
    defer xml2.deinit();

    // Navigate to the node that is the root of the subtree to be deleted.
    // In this case, we wish to find the node having tag "ROW" with content "477956"
    _ = try xml2.chilkatPath(alloc, "OSSZES|/C/ROW,*477956*|$");

    // Examine the xml2, it should be just the subtree.
    std.debug.print("{s}\n", .{try xml2.getXml(alloc)});

    // Now detach xml2 from the it's XML document.
    // xml2 will now be it's own XML document.
    xml2.removeFromTree();

    // Examine our original XML document.  The subtree is removed:
    std.debug.print("{s}\n", .{try xml.getXml(alloc)});
}