(Ruby) XML SearchForTag Method

Demonstrates the SearchForTag and SearchForTag2 methods.

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></root>
</root>

Downloads for Windows/Linux and Install Instructions

require 'chilkat'

xml = Chilkat::CkXml.new()

#  The sample input XML is available at http://www.chilkatsoft.com/data/fruitSearch.xml
success = xml.LoadXmlFile("fruitSearch.xml")
if (success != true)
    print xml.lastErrorText() + "\n";
    exit
end

#  Search the sub-tree rooted at "searchRoot"
# xSearchRoot is a CkXml
xSearchRoot = xml.FindChild("searchRoot")

#  Search for all nodes having the tag "fruit"
# xBeginAfter is a CkXml
xBeginAfter = nil
# xFound is a CkXml
xFound = xSearchRoot.SearchForTag(xBeginAfter,"fruit")
while !(xFound == nil )

    print xFound.content() + "\n";

    # xBeginAfter is a CkXml
    xBeginAfter = xFound
    # xFound is a CkXml
    xFound = xSearchRoot.SearchForTag(xBeginAfter,"fruit")
end

print "--------------------------" + "\n";

#  ---------------------------------------------------------------------------------
#  Now do the same, but instead use SearchForTag2
#  which updates the internal reference of the caller instead
#  of returning the found node.

# xBeginAfter is a CkXml
xBeginAfter = xSearchRoot.GetSelf()
# xSearch is a CkXml
xSearch = xSearchRoot.GetSelf()

success = xSearch.SearchForTag2(xBeginAfter,"fruit")
while success == true

    print xSearch.content() + "\n";

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

    success = xSearch.SearchForTag2(xBeginAfter,"fruit")
end