yweathernamespacecontext.java

yahoo 所使用的 天气预报的解析代码

/*
 * YWeatherNamespaceContext.java
 *
 * Created on May 25, 2007, 2:34 PM
 *
 */

package yweatherbeta;

import java.util.Iterator;
import javax.xml.XMLConstants;
import javax.xml.namespace.NamespaceContext;

/**
 *
 * @author BEN
 */
public class YWeatherNamespaceContext implements NamespaceContext {
    
    public String getNamespaceURI(String prefix) {
        if (prefix == null) throw new NullPointerException("Null prefix");
        else if ("yweather".equals(prefix)) return "http://xml.weather.yahoo.com/ns/rss/1.0";
        else if ("geo".equals(prefix)) return "http://www.w3.org/2003/01/geo/wgs84_pos#";
        else if ("xml".equals(prefix)) return XMLConstants.XML_NS_URI;
        return XMLConstants.NULL_NS_URI;
    }
    
    // This method isn't necessary for XPath processing.
    public String getPrefix(String uri) {
        throw new UnsupportedOperationException();
    }
    
    // This method isn't necessary for XPath processing either.
    public Iterator getPrefixes(String uri) {
        throw new UnsupportedOperationException();
    }
    
}