Mixed Parsing

This example uses SAXDOMIX to do mixed SAX-DOM parsing.

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The parsing starts in SAX mode, which means that SAX events are forwarded to the application for handling. Certain XML elements trigger the switch to DOM. Each such element will be the root of a DOM tree constructed by SAXDOMIX. All sub-elements, character data, processing instructions and comments that are contained directly or indirectly by a root element will be part of the DOM tree. After building a DOM tree, SAXDOMIX forwards it to the application for handling. Then, SAXDOMIX returns to SAX parsing automatically.

In the case of this example, the handling of the SAX events and DOM trees consists of printing them to the output console. The names of the elements that trigger the switch from SAX to DOM are given in the command line.

We have the following MixedParsing.xml file:

    <?xml version="1.0" encoding="utf-8"?>

    <!DOCTYPE root [
    <!ELEMENT root (elem1, elem2)>
    <!ELEMENT elem1 (elem11, elem12, elem13)>
    <!ELEMENT elem11 (#PCDATA)>
    <!ELEMENT elem12 (#PCDATA)>
    <!ELEMENT elem13 (elem131, elem132)>
    <!ELEMENT elem131 EMPTY>
    <!ELEMENT elem132 EMPTY>
    <!ELEMENT elem2 (elem21, elem22, elem23)>
    <!ELEMENT elem21 (#PCDATA)>
    <!ELEMENT elem22 (#PCDATA)>
    <!ELEMENT elem23 (#PCDATA)>
    ]>

    <root>
        <elem1>
            <!-- comment1 -->
            <elem11>text11</elem11>
            <elem12><![CDATA[cdata12]]></elem12>
            <elem13>
                <elem131/>
                <elem132/>
            </elem13>
            <?proc1 data?>
        </elem1>
        <elem2>
            <!-- comment2 -->
            <elem21>data21</elem21>
            <elem22><![CDATA[cdata22]]></elem22>
            <elem23>text23</elem23>
            <?proc2 data?>
        </elem2>
    </root>

Execute the following command to get the XML content of the elem1, elem21 and elem22 elements as DOM trees. The rest of the XML content is handled as SAX events.

    java com.devsphere.examples.xml.saxdomix.MixedParsing
    MixedParsing.xml -validation elem1 elem21 elem22

You'll get the following output:

    SAX setDocumentLocator

    SAX startDocument

        SAX startElement root

            DOM Tree
                Element elem1
                    Comment  comment1
                    Element elem11
                        Text text11
                    Element elem12
                        CDATASection cdata12
                    Element elem13
                        Element elem131
                        Element elem132
                    ProcessingInstruction proc1

            SAX startElement elem2

                DOM Tree
                    Element elem21
                        Text data21

                DOM Tree
                    Element elem22
                        CDATASection cdata22

                SAX startElement elem23

                    SAX characters text23

                SAX endElement elem23

                SAX processingInstruction proc2

            SAX endElement elem2

        SAX endElement root

    SAX endDocument