[GROOVY-2570] Support the multiple namespaces with NamespaceBuilderSupport

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.5.7, 1.6-beta-2
• Fix Version/s: 1.6-rc-1, 1.7-beta-1
• Component/s: XML Processing
• Assignee: Paul King
• Reporter: Denver Dino
• Created: 03/Feb/08 03:16
• Updated: 23/Dec/08 05:58
• Resolved: 23/Nov/08 02:15

Description

The major limitation when using the BuilderSupport is it doesn't support the multiple namespaces which is very common.

E.g. I want to create the XML message to invoke Google calendar

<entry xmlns='http://www.w3.org/2005/Atom' xmlns:gCal='http://schemas.google.com/gCal/2005'>
  <content type="html">Tennis with John April 11 3pm-3:30pm</content>
  <gCal:quickadd value="true"/>
</entry>

I cannot build the message with current NamespaceBuilderSupport for there is only one namespace could be specified.

So, I create one NamespaceBuilderSupport then I can create the message in Groovy.

def builder = new NamespaceBuilderSupport (DOMBuilder.newInstance());
builder.namespace('http://www.w3.org/2005/Atom');
builder.namespace('http://schemas.google.com/gCal/2005', 'gCal')

def data = builder.entry {
  "gCal:quickadd"(value:"true")
  title("Tennis with John")
  content(type:'html', "Tennis with wen Bing in PKU on February 5 3pm-3:30pm")
}

And the reference impl is as following.

public class NamespaceBuilderSupport extends BuilderSupport{

    private Map<String, String> nsMap = new HashMap<String, String>();

    public NamespaceBuilderSupport(BuilderSupport builder) {
        super(builder);
    }
	
    protected NamespaceBuilderSupport namespace(String namespaceURI) {
        nsMap.put("", namespaceURI);
        return this;
    }
	
    protected NamespaceBuilderSupport namespace(String namespaceURI, String prefix) {
        nsMap.put(prefix, namespaceURI);
        return this;
    }
	
    protected Object getName(String methodName) {
        String prefix = "";
        String localPart = methodName;
        int idx = methodName.indexOf(':');
        if (idx > 0 ) {
            prefix = methodName.substring(0, idx);
            localPart = methodName.substring(idx + 1);
        }
        String namespaceURI = nsMap.get(prefix);
        if (namespaceURI == null) {
            namespaceURI = "";
            prefix = "";
        }
        return new QName(namespaceURI, localPart, prefix);
    }

    @Override
    protected Object createNode(Object name) {
        return name;
    }

    @Override
    protected Object createNode(Object name, Object obj1) {
        return name;
    }

    @Override
    protected Object createNode(Object name, Map map) {
        return name;
    }

    @Override
    protected Object createNode(Object name, Map map, Object obj1) {
        return name;
    }

    @Override
    protected void setParent(Object obj, Object obj1) { }

}

Thanks in advance. I hope it could be helpful.