OMElement.declareDefaultNamespace() declares empty namespace for child element.
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Key: AXIS2-3156
URL: https://issues.apache.org/jira/browse/AXIS2-3156
Project: Axis 2.0 (Axis2)
Issue Type: Bug
Components: om
Affects Versions: 1.3
Environment: Microsoft Windows 2003 Server, Java 1.5.0_11. Axis2
version 1.3 (uses AXIOM version 1.2.5).
Reporter: Yechiel Mondrowitz
Fix For: 1.3
When calling declareDefaultNamespace() on a parent node, AXIOM assignes a blank
namespace on the first level's child element. So if XML is passed to AXIOM
that looks like this:
<outerTag>
<innerTag>
<node1>Hello</node1>
<node2>Hello</node2>
</innerTag>
</outerTag>
And then declareDefaultNamespace() of "http://someNamespace"; is called on the
<outerTag>, the resulting XML will be this:
<outerTag xmlns="http://someNamespace";>
<innerTag xmlns="">
<node1>Hello</node1>
<node2>Hello</node2>
</innerTag>
</outerTag>
Notice the xmlns="" declared in the <innerTag>. According to my understanding
of XML namespaces, the <innerTag> and its child nodes will no longer belong to
the parent namespace of "http://someNamespace";, since it explicitly overrides
it with an empty namespace. So <innerTag> and its child nodes will in fact not
belong to any namespace! Here is a small program to illustrate:
import org.apache.axiom.om.*;
import org.apache.axiom.om.impl.llom.util.*;
public class Test2 {
public static void main(String [] args) {
try {
String xmlString =
"<outerTag>" +
"<innerTag>" +
"<node1>Hello</node1>" +
"<node2>Hello</node2>" +
"</innerTag>" +
"</outerTag>";
OMElement elem = AXIOMUtil.stringToOM(xmlString);
elem.declareDefaultNamespace("http://someNamespace";);
System.out.println(elem.toString());
}
catch(Exception e) {
e.printStackTrace();
}
}
}
The output of this program is this (I added line breaks in the XML for easier
readability):
<outerTag xmlns="http://someNamespace";>
<innerTag xmlns="">
<node1>Hello</node1>
<node2>Hello</node2>
</innerTag>
</outerTag>
As you can see, the <innerTag> was assigned xmlns="" by AXIOM.
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