Rust

XML SearchForAttribute Method

See more XML Examples

Demonstrates the SearchForAttribute method.

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

<root>
    <searchRoot>
        <fruit color="red">apple</fruit>
        <fruit color="green">pear</fruit>
        <veg color="orange">carrot</veg>
        <meat animal="cow">beef</meat>
        <xyz>
            <fruit color="blue">blueberry</fruit>
            <veg color="green">broccoli</veg>
        </xyz>
        <fruit color="purple">grape</fruit>
        <cheese color="yellow">cheddar</cheese>
    </searchRoot>
    <fruit color="red">strawberry</fruit>
    <fruit color="orange">peach</fruit>
</root>

Rust

let mut success = false;

let xml = chilkat::Xml::new();

success = xml.load_xml_file("qa_data/xml/fruitSearch.xml").is_ok();
if !success {
    println!("{}", xml.last_error_text());
    return;
}

// Search the sub-tree rooted at "searchRoot";
let mut x_search_root = xml.find_child("searchRoot").unwrap();
if !xml.last_method_success() {
    println!("searchRoot not found, searching from root.");
    x_search_root = xml.get_root().unwrap();
}

// Search for all "fruit" nodes having a color attribute
// where the name of the color ends in "e";
let mut x_begin_after = x_search_root.get_self().unwrap();
let mut x_found = x_search_root.search_for_attribute(Some(&x_begin_after), "fruit", "color", "*e").unwrap();
while x_search_root.last_method_success() {

    println!("{}: {}", x_found.content(), x_found.get_attr_value("color").unwrap_or_default());

    x_begin_after = x_found;
    x_found = x_search_root.search_for_attribute(Some(&x_begin_after), "fruit", "color", "*e").unwrap();
}

// The correct output is:
// grape: purple
// blueberry: blue

println!("--------------------------");

// ---------------------------------------------------------------------------------
// Now do the same, but instead use SearchForAttribute2
// which updates the internal reference of the caller instead
// of returning the found node.

x_begin_after = x_search_root.get_self().unwrap();
let x_search = x_search_root.get_self().unwrap();

success = x_search.search_for_attribute2(Some(&x_begin_after), "fruit", "color", "*e").is_ok();
while success {

    println!("{}: {}", x_search.content(), x_search.get_attr_value("color").unwrap_or_default());

    // Copy the internal references so that the next search
    // begins after the found node.
    x_begin_after.copy_ref(&x_search);
    x_search.copy_ref(&x_search_root);

    success = x_search.search_for_attribute2(Some(&x_begin_after), "fruit", "color", "*e").is_ok();
}