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https://issues.apache.org/jira/browse/OODT-449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13271120#comment-13271120
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Ross Laidlaw commented on OODT-449:
-----------------------------------
I've been experimenting with some ideas to implement Paul's suggestion for
namespaces. I have a solution that appears to be working. Here are the steps
I took:
1) Added Paul's namespace tags to the georss-config.xml file, as follows:
{code}
<namespace prefix="geo" uri="http://www.w3.org/2003/01/geo/wgs84_pos#"; />
<namespace prefix="georss" uri="http://www.georss.org/georss"; />
<namespace prefix="gml" uri="http://www.opengis.net/gml"; />
{code}
2) Created a new RSSNamespace class, which is very similar to the RSSTag class:
{code}
package org.apache.oodt.cas.product.rss;
public class RSSNamespace
{
private String prefix;
private String uri;
public RSSNamespace() { }
public String getPrefix() { return prefix; }
public void setPrefix(String prefix) { this.prefix = prefix;}
public String getUri() { return uri; }
public void setUri(String uri) { this.uri = uri; }
}
{code}
3) Modified the RSSConfig class to add a list to store namespaces:
* added new instance variable namespaces:
{code}
private List<RSSNamespace> namespaces;
{code}
* added assignment to the constructor:
{code}
this.namespaces = new Vector<RSSNamespace>();
{code}
* added getter and setter methods for the namespaces instance variable:
{code}
public List<RSSNamespace> getNamespaces() { return namespaces; }
public void setNamespaces(List<RSSNamespace> namespaces) { this.namespaces =
namespaces; }
{code}
4) Added new constants to the RSSConfigReaderMetKeys interface:
{code}
public static final String NAMESPACE_TAG = "namespace";
public static final String NAMESPACE_ATTR_PREFIX = "prefix";
public static final String NAMESPACE_ATTR_URI = "uri";
{code}
5) Updated the RSSConfigReader class to read in the namespace tags:
* added readNamespaces() method to RSSConfigReader
{code}
protected static void readNamespaces(Element root, RSSConfig conf) {
NodeList namespaceList = root.getElementsByTagName(NAMESPACE_TAG);
if (namespaceList != null && namespaceList.getLength() > 0) {
for (int i = 0; i < namespaceList.getLength(); i++) {
Element namespaceElem = (Element) namespaceList.item(i);
RSSNamespace namespace = new RSSNamespace();
namespace.setPrefix(namespaceElem.getAttribute(NAMESPACE_ATTR_PREFIX));
namespace.setUri(namespaceElem.getAttribute(NAMESPACE_ATTR_URI));
conf.getNamespaces().add(namespace);
}
}
}
{code}
* added call to readNamespaces before the call to readTags in the readConfig
method
{code}
public static RSSConfig readConfig(File file) throws FileNotFoundException {
...
readNamespaces(rootElem, conf);
readTags(rootElem, conf);
...
}
{code}
6) Updated the doIt() method in the RSSProductServlet class to process the list
of namespace tags and add any namespaces to the rss tag of the output:
{code}
public void doIt(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, java.io.IOException
{
...
if (products != null && products.size() > 0)
{
...
try
{
...
Element rss = XMLUtils.addNode(doc, doc, "rss");
XMLUtils.addAttribute(doc, rss, "version", "2.0");
XMLUtils.addAttribute(doc, rss, "xmlns:cas", (String) NS_MAP.get("cas"));
for (RSSNamespace namespace : this.conf.getNamespaces())
{
XMLUtils.addAttribute(doc, rss, "xmlns:" + namespace.getPrefix(),
namespace.getUri());
}
...
}
}
}
{code}
7) Tested the output:
The results showed that the namespaces defined in georss-config.xml are now
being added to the 'rss' tag of the output, as follows:
{code}
<rss xmlns:cas="http://oodt.jpl.nasa.gov/1.0/cas";
xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#";
xmlns:georss="http://www.georss.org/georss";
xmlns:gml="http://www.opengis.net/gml"; version="2.0">
{code}
> Create a default GeoRSS configuration file for the fmprod web application
> -------------------------------------------------------------------------
>
> Key: OODT-449
> URL: https://issues.apache.org/jira/browse/OODT-449
> Project: OODT
> Issue Type: Sub-task
> Components: file manager
> Reporter: Ross Laidlaw
> Labels: gsoc2012
> Fix For: 0.5
>
>
> Create a default GeoRSS configuration file for the fmprod web application of
> the File Manager component.
> The GeoRSS configuration file will contain all of the information from the
> default RSS configuration file. In addition, it will also contain
> definitions for latitude and longitude GeoRSS XML tags.
> Name the file 'georss-config.xml' and add the file to
> http://svn.apache.org/repos/asf/oodt/trunk/webapp/fmprod/src/main/resources
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