poi/xmlbeans/docs/guide/conUsingBookmarksToAnnotateXML.html
2018-02-16 22:41:27 +00:00

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<title>Using Bookmarks to Annotate XML</title>
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<p class=Title>Using Bookmarks to Annotate XML</p>
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<p>You can use a cursor to insert bookmarks that annotate XML with markers containing
information you design. These bookmarks aren't written into the XML itself,
but in a sense "hang" from the location where it was inserted. In this way
you can associate arbitrary pieces of information with specific parts of the
XML.</p>
<P>You design your own bookmark classes by extending <span class="langinline"><a href="../reference/org/apache/xmlbeans/XmlCursor.XmlBookmark.html">XmlBookmark</a></span>,
a nested class of <span class="langinline"><a href="../reference/org/apache/xmlbeans/XmlCursor.html">XmlCursor</a></span>.
You can design your bookmark class to contain information specific to your
needs. </P>
<P>In the following example, <span class="langinline">OrderBookmark</span> is
an inner class that extends <span class="langinline">XmlCursor.XmlBookmark</span>.
It merely stores a piece of text.</P>
<PRE>
/*
* The OrderBookmark class includes a constructor through which you will
* insert your bookmark's content. It also includes get and set methods
* you can use to retrieve and change the content.
*/
static class OrderBookmark extends XmlCursor.XmlBookmark {
public OrderBookmark (String text) { TEXT = text; }
public String TEXT;
public String getText() { return TEXT; }
public void setText(String newText) { TEXT = newText; }
}
</PRE>
<p>You can use instances of this class to store bookmarks at places in your
XML. The following excerpt of code creates a cursor and an instance of the
<span class="langinline">OrderBookmark</span> class. Then it uses the cursor
to insert the bookmark at the cursor's current location.</p>
<pre>
XmlCursor orderCursor = xmlDoc.newCursor();
OrderBookmark thisBookmark = new OrderBookmark("foo");
orderCursor.setBookmark(thisAnnotation);
</pre>
<p class=relatedtopics>Related Topics</p>
<p><a href="conNavigatingXMLwithCursors.html">Navigating XML with Cursors</a></p>
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