Eclipse Community Forums: Sapphire » XmlElement CDATA section

Help

Home

Home » Archived » Sapphire » XmlElement CDATA section

Show: Today's Messages :: Show Polls :: Message Navigator

XmlElement CDATA section [message #814562]

Tue, 06 March 2012 15:50

Greg Amerson

Messages: 119
Registered: March 2010

Senior Member

Hey everyone,

I have an xml file where I have a json String that is embedded in a xml element, like

<metadata>
   <![CDATA[{"xy":[50,50]}]]>
</metadata>

So what I'm currently doing is creating a ElementBindingImpl that will grab the XmlElement and read the contents of the CDATA section. Reading works fine, but the problem I'm having is when there is not a <metadata> element and I have to create one and then add a CDATA section. Is it possible to create a CDATA child node for a XmlElement

Report message to a moderator

Re: XmlElement CDATA section [message #814775 is a reply to message #814562]

Tue, 06 March 2012 22:00

Konstantin Komissarchik

Messages: 1077
Registered: July 2009

Senior Member

You would have to get the DOM node from the XmlElement convenience wrapper and use DOM API to create the CDATA section. Something like this:

XmlElement el = ...
Element domel = el.getDomNode();
CDATASection cdata = domel.getDocument().createCDATASection( "..." );
domel.insertBefore( cdata, null );

Report message to a moderator

Re: XmlElement CDATA section [message #814895 is a reply to message #814775]

Wed, 07 March 2012 01:27

Greg Amerson

Messages: 119
Registered: March 2010

Senior Member

Easy enough, thanks!

Report message to a moderator

Re: XmlElement CDATA section [message #1062726 is a reply to message #814895]

Mon, 10 June 2013 14:09

kon f

Messages: 152
Registered: March 2012

Senior Member

Could you please share your solution? I'm not sure where to place this wrapper code. Unfortunately, I couldn't find any CDATA example in the sample project. Thank you!

Report message to a moderator

Re: XmlElement CDATA section [message #1063022 is a reply to message #1062726]

Tue, 11 June 2013 20:00

Konstantin Komissarchik

Messages: 1077
Registered: July 2009

Senior Member

To bind to CDATA, you will need to implement XmlValueBindingImpl and use @CustomXmlValueBinding to attach it to the property. Take a look at the XmlValueBindingImpl API. The methods that you need to implement are read() and write(). Use xml() method to get a handle on XmlElement. Then see the code snippet shown previously for how to get access to DOM and manipulate CDATA nodes. See DOM API for more details on handling CDATA.

Report message to a moderator

Re: XmlElement CDATA section [message #1063118 is a reply to message #1063022]

Wed, 12 June 2013 11:50

kon f

Messages: 152
Registered: March 2012

Senior Member

Hey Konstantin,

thank you for the information. Here is my solution if anyone else should have the same issue.

import org.eclipse.sapphire.modeling.xml.XmlElement;
import org.eclipse.sapphire.modeling.xml.XmlValueBindingImpl;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

public class CDataXmlValueBindingImpl extends XmlValueBindingImpl {

    @Override
    public String read() {
        return xml(false).getText();
    }

    @Override
    public void write(String value) {
        XmlElement el = xml(false);
        Element domel = el.getDomNode();
        this.removeAllChildren(domel);
        Node newNode = getNode(value, domel);
        domel.insertBefore(newNode, null);
    }

    private void removeAllChildren(Element domel) {
        while (domel.hasChildNodes()) {
            domel.removeChild(domel.getFirstChild());
        }
    }

    private Node getNode(String value, Element domel) {
        if (!value.isEmpty()) {
            return domel.getOwnerDocument().createCDATASection(value);
        }

        return domel.getOwnerDocument().createTextNode(value);
    }
}

And here the property annotation:

...
@CustomXmlValueBinding(impl = CDataXmlValueBindingImpl.class)
ValueProperty PROP_SOURCE_CODE = new ValueProperty(TYPE, "SourceCode");
...

Thank you!

Kon

Report message to a moderator

Previous Topic:	Action Handler to move value binding to top/bottom of list
Next Topic:	License of the icons

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Sat Nov 09 02:00:44 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter