(Perl) XML SearchForAttribute Method

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>

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

$xml = chilkat::CkXml->new();

$success = $xml->LoadXmlFile("qa_data/xml/fruitSearch.xml");
if ($success != 1) {
    print $xml->lastErrorText() . "\r\n";
    exit;
}

# Search the sub-tree rooted at "searchRoot"
# xSearchRoot is a Xml
$xSearchRoot = $xml->FindChild("searchRoot");
if ($xml->get_LastMethodSuccess() == 0) {
    print "searchRoot not found, searching from root." . "\r\n";
    # xSearchRoot is a Xml
    $xSearchRoot = $xml->GetRoot();
}

# Search for all "fruit" nodes having a color attribute
# where the name of the color ends in "e"
# xBeginAfter is a Xml
$xBeginAfter = $xSearchRoot->GetSelf();
# xFound is a Xml
$xFound = $xSearchRoot->SearchForAttribute($xBeginAfter,"fruit","color","*e");
while (($xSearchRoot->get_LastMethodSuccess() == 1)) {

    print $xFound->content() . ": " . $xFound->getAttrValue("color") . "\r\n";

    # xBeginAfter is a Xml
    $xBeginAfter = $xFound;
    # xFound is a Xml
    $xFound = $xSearchRoot->SearchForAttribute($xBeginAfter,"fruit","color","*e");
}

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

print "--------------------------" . "\r\n";

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

# xBeginAfter is a Xml
$xBeginAfter = $xSearchRoot->GetSelf();
# xSearch is a Xml
$xSearch = $xSearchRoot->GetSelf();

$success = $xSearch->SearchForAttribute2($xBeginAfter,"fruit","color","*e");
while ($success == 1) {

    print $xSearch->content() . ": " . $xSearch->getAttrValue("color") . "\r\n";

    # Copy the internal references so that the next search
    # begins after the found node.
    $xBeginAfter->CopyRef($xSearch);
    $xSearch->CopyRef($xSearchRoot);

    $success = $xSearch->SearchForAttribute2($xBeginAfter,"fruit","color","*e");
}