(PureBasic) 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 PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkXml.pb"

Procedure ChilkatExample()

    xml.i = CkXml::ckCreate()
    If xml.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    xSearchRoot.i
    xBeginAfter.i
    xFound.i

    success.i = CkXml::ckLoadXmlFile(xml,"qa_data/xml/fruitSearch.xml")
    If success <> 1
        Debug CkXml::ckLastErrorText(xml)
        CkXml::ckDispose(xml)
        ProcedureReturn
    EndIf

    ; Search the sub-tree rooted at "searchRoot"
    xSearchRoot = CkXml::ckFindChild(xml,"searchRoot")
    If CkXml::ckLastMethodSuccess(xml) = 0
        Debug "searchRoot not found, searching from root."
        xSearchRoot = CkXml::ckGetRoot(xml)
    EndIf

    ; Search for all "fruit" nodes having a color attribute
    ; where the name of the color ends in "e"
    xBeginAfter = CkXml::ckGetSelf(xSearchRoot)
    xFound = CkXml::ckSearchForAttribute(xSearchRoot,xBeginAfter,"fruit","color","*e")
    While (CkXml::ckLastMethodSuccess(xSearchRoot) = 1)

        Debug CkXml::ckContent(xFound) + ": " + CkXml::ckGetAttrValue(xFound,"color")

        CkXml::ckDispose(xBeginAfter)

        xBeginAfter = xFound
        xFound = CkXml::ckSearchForAttribute(xSearchRoot,xBeginAfter,"fruit","color","*e")
    Wend

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

    CkXml::ckDispose(xBeginAfter)

    Debug "--------------------------"

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

    xBeginAfter = CkXml::ckGetSelf(xSearchRoot)
    xSearch = CkXml::ckGetSelf(xSearchRoot)

    success = CkXml::ckSearchForAttribute2(xSearch,xBeginAfter,"fruit","color","*e")
    While success = 1

        Debug CkXml::ckContent(xSearch) + ": " + CkXml::ckGetAttrValue(xSearch,"color")

        ; Copy the internal references so that the next search
        ; begins after the found node.
        CkXml::ckCopyRef(xBeginAfter,xSearch)
        CkXml::ckCopyRef(xSearch,xSearchRoot)

        success = CkXml::ckSearchForAttribute2(xSearch,xBeginAfter,"fruit","color","*e")
    Wend

    CkXml::ckDispose(xSearch)

    CkXml::ckDispose(xBeginAfter)

    CkXml::ckDispose(xSearchRoot)



    CkXml::ckDispose(xml)


    ProcedureReturn
EndProcedure