(Lianja) 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>

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loXml = createobject("CkXml")

llSuccess = loXml.LoadXmlFile("qa_data/xml/fruitSearch.xml")
if (llSuccess <> .T.) then
    ? loXml.LastErrorText
    release loXml
    return
endif

// Search the sub-tree rooted at "searchRoot"
loXSearchRoot = loXml.FindChild("searchRoot")
if (loXml.LastMethodSuccess = .F.) then
    ? "searchRoot not found, searching from root."
    loXSearchRoot = loXml.GetRoot()
endif

// Search for all "fruit" nodes having a color attribute
// where the name of the color ends in "e"
loXBeginAfter = loXSearchRoot.GetSelf()
loXFound = loXSearchRoot.SearchForAttribute(loXBeginAfter,"fruit","color","*e")
do while (loXSearchRoot.LastMethodSuccess = .T.)

    ? loXFound.Content + ": " + loXFound.GetAttrValue("color")

    release loXBeginAfter
    loXBeginAfter = loXFound
    loXFound = loXSearchRoot.SearchForAttribute(loXBeginAfter,"fruit","color","*e")
enddo

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

release loXBeginAfter

? "--------------------------"

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

loXBeginAfter = loXSearchRoot.GetSelf()
loXSearch = loXSearchRoot.GetSelf()

llSuccess = loXSearch.SearchForAttribute2(loXBeginAfter,"fruit","color","*e")
do while llSuccess = .T.

    ? loXSearch.Content + ": " + loXSearch.GetAttrValue("color")

    // Copy the internal references so that the next search
    // begins after the found node.
    loXBeginAfter.CopyRef(loXSearch)
    loXSearch.CopyRef(loXSearchRoot)

    llSuccess = loXSearch.SearchForAttribute2(loXBeginAfter,"fruit","color","*e")
enddo

release loXSearch
release loXBeginAfter

release loXSearchRoot


release loXml