/* ********************************************************************** **
** Copyright notice **
** **
** (c) 2005-2009 RSSOwl Development Team **
** http://www.rssowl.org/ **
** **
** All rights reserved **
** **
** This program and the accompanying materials are made available under **
** the terms of the Eclipse Public License v1.0 which accompanies this **
** distribution, and is available at: **
** http://www.rssowl.org/legal/epl-v10.html **
** **
** A copy is found in the file epl-v10.html and important notices to the **
** license from the team is found in the textfile LICENSE.txt distributed **
** in this package. **
** **
** This copyright notice MUST APPEAR in all copies of the file! **
** **
** Contributors: **
** RSSOwl Development Team - initial API and implementation **
** **
** ********************************************************************** */
package org.rssowl.core.internal.interpreter;
import org.jdom.Attribute;
import org.jdom.Document;
import org.jdom.Element;
import org.rssowl.core.Owl;
import org.rssowl.core.persist.IFeed;
import org.rssowl.core.persist.IImage;
import org.rssowl.core.persist.INews;
import org.rssowl.core.persist.ITextInput;
import org.rssowl.core.util.URIUtils;
import java.net.URI;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
/**
* Interpreter for all RDF Formats.
*
* @author bpasero
*/
public class RDFInterpreter extends BasicInterpreter {
private int fNewsCounter;
/*
* @see org.rssowl.core.interpreter.IFormatInterpreter#interpret(org.jdom.Document,
* org.rssowl.core.interpreter.types.IFeed)
*/
public void interpret(Document document, IFeed feed) {
Element root = document.getRootElement();
setDefaultNamespaceUri(root.getNamespace().getURI());
setRootElementName(root.getName());
feed.setFormat("RDF"); //$NON-NLS-1$
processFeed(root, feed);
}
private void processFeed(Element element, IFeed feed) {
/* Interpret Attributes */
processNamespaceAttributes(element, feed);
/* Interpret Children */
List< ? > feedChildren = element.getChildren();
for (Iterator< ? > iter = feedChildren.iterator(); iter.hasNext();) {
Element child = (Element) iter.next();
String name = child.getName().toLowerCase();
/* Check wether this Element is to be processed by a Contribution */
if (processElementExtern(child, feed))
continue;
/* Process Channel */
else if ("channel".equals(name)) //$NON-NLS-1$
processChannel(child, feed);
/* Process Item */
else if ("item".equals(name)) //$NON-NLS-1$
processItem(child, feed);
/* Process Image */
else if ("image".equals(name)) //$NON-NLS-1$
processImage(child, feed);
/* Process TextInput */
else if ("textinput".equals(name)) //$NON-NLS-1$
processTextInput(child, feed);
}
}
private void processChannel(Element element, IFeed feed) {
/* Interpret Attributes */
processNamespaceAttributes(element, feed);
/* Interpret Children */
List< ? > channelChildren = element.getChildren();
for (Iterator< ? > iter = channelChildren.iterator(); iter.hasNext();) {
Element child = (Element) iter.next();
String name = child.getName().toLowerCase();
/* Check wether this Element is to be processed by a Contribution */
if (processElementExtern(child, feed))
continue;
/* Title */
else if ("title".equals(name)) { //$NON-NLS-1$
feed.setTitle(child.getText());
processNamespaceAttributes(child, feed);
}
/* Link */
else if ("link".equals(name)) { //$NON-NLS-1$
URI uri = URIUtils.createURI(child.getText());
if (uri != null)
feed.setHomepage(uri);
processNamespaceAttributes(child, feed);
}
/* Description */
else if ("description".equals(name)) { //$NON-NLS-1$
feed.setDescription(child.getText());
processNamespaceAttributes(child, feed);
}
/* Process Image */
else if ("image".equals(name)) //$NON-NLS-1$
processImage(child, feed);
/* Process TextInput */
else if ("textinput".equals(name)) //$NON-NLS-1$
processTextInput(child, feed);
}
}
private void processTextInput(Element element, IFeed feed) {
ITextInput input = Owl.getModelFactory().createTextInput(feed);
/* Check wether the Attributes are to be processed by a Contribution */
processNamespaceAttributes(element, input);
/* Interpret Children */
List< ? > inputChilds = element.getChildren();
for (Iterator< ? > iter = inputChilds.iterator(); iter.hasNext();) {
Element child = (Element) iter.next();
String name = child.getName().toLowerCase();
/* Check wether this Element is to be processed by a Contribution */
if (processElementExtern(child, input))
continue;
/* Title */
else if ("title".equals(name)) { //$NON-NLS-1$
input.setTitle(child.getText());
processNamespaceAttributes(child, input);
}
/* Description */
else if ("description".equals(name)) { //$NON-NLS-1$
input.setDescription(child.getText());
processNamespaceAttributes(child, input);
}
/* Name */
else if ("name".equals(name)) { //$NON-NLS-1$
input.setName(child.getText());
processNamespaceAttributes(child, input);
}
/* Link */
else if ("link".equals(name)) { //$NON-NLS-1$
URI uri = URIUtils.createURI(child.getText());
if (uri != null)
input.setLink(uri);
processNamespaceAttributes(child, input);
}
}
}
private void processImage(Element element, IFeed feed) {
IImage image = Owl.getModelFactory().createImage(feed);
/* Check wether the Attributes are to be processed by a Contribution */
processNamespaceAttributes(element, image);
/* Interpret Children */
List< ? > imageChilds = element.getChildren();
for (Iterator< ? > iter = imageChilds.iterator(); iter.hasNext();) {
Element child = (Element) iter.next();
String name = child.getName().toLowerCase();
/* Check wether this Element is to be processed by a Contribution */
if (processElementExtern(child, image))
continue;
/* URL */
else if ("url".equals(name)) { //$NON-NLS-1$
URI uri = URIUtils.createURI(child.getText());
if (uri != null)
image.setLink(uri);
processNamespaceAttributes(child, image);
}
/* Title */
else if ("title".equals(name)) { //$NON-NLS-1$
image.setTitle(child.getText());
processNamespaceAttributes(child, image);
}
/* Link */
else if ("link".equals(name)) { //$NON-NLS-1$
URI uri = URIUtils.createURI(child.getText());
if (uri != null)
image.setHomepage(uri);
processNamespaceAttributes(child, image);
}
}
}
private void processItem(Element element, IFeed feed) {
INews news = Owl.getModelFactory().createNews(null, feed, new Date(System.currentTimeMillis() - (fNewsCounter++ * 1)));
news.setBase(feed.getBase());
/* Interpret Attributes */
List<?> itemAttributes = element.getAttributes();
for (Iterator<?> iter = itemAttributes.iterator(); iter.hasNext();) {
Attribute attribute = (Attribute) iter.next();
String name = attribute.getName().toLowerCase();
/* Check wether this Attribute is to be processed by a Contribution */
if (processAttributeExtern(attribute, news))
continue;
/* About */
else if ("about".equals(name)) //$NON-NLS-1$
Owl.getModelFactory().createGuid(news, attribute.getValue(), true);
}
/* Interpret Children */
List<?> newsChilds = element.getChildren();
for (Iterator<?> iter = newsChilds.iterator(); iter.hasNext();) {
Element child = (Element) iter.next();
String name = child.getName().toLowerCase();
/* Check wether this Element is to be processed by a Contribution */
if (processElementExtern(child, news))
continue;
/* Title */
else if ("title".equals(name)) { //$NON-NLS-1$
news.setTitle(child.getText());
processNamespaceAttributes(child, news);
}
/* Link */
else if ("link".equals(name)) { //$NON-NLS-1$
if (child.getText().length() > 0) {
URI uri = URIUtils.createURI(child.getText());
if (uri != null)
news.setLink(uri);
}
processNamespaceAttributes(child, news);
}
/* Description */
else if ("description".equals(name)) { //$NON-NLS-1$
news.setDescription(child.getText());
processNamespaceAttributes(child, news);
}
}
}
}