/*
* Copyright 2004-2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
package components.renderkit;
import components.components.MapComponent;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import java.io.IOException;
/**
* <p>Renderer for {@link MapComponent} in an HTML environment.</p>
*/
public class MapRenderer extends BaseRenderer {
// -------------------------------------------------------- Renderer Methods
/**
* <p>Decode the incoming request parameters to determine which
* hotspot (if any) has been selected.</p>
*
* @param context <code>FacesContext</code>for the current request
* @param component <code>UIComponent</code> to be decoded
*/
public void decode(FacesContext context, UIComponent component) {
if ((context == null) || (component == null)) {
throw new NullPointerException();
}
MapComponent map = (MapComponent) component;
String key = getName(context, map);
String value = (String)
context.getExternalContext().getRequestParameterMap().get(key);
if (value != null) {
map.setCurrent(value);
}
}
/**
* <p>Encode the beginning of this component.</p>
*
* @param context <code>FacesContext</code>for the current request
* @param component <code>UIComponent</code> to be decoded
*/
public void encodeBegin(FacesContext context, UIComponent component)
throws IOException {
if ((context == null) || (component == null)) {
throw new NullPointerException();
}
MapComponent map = (MapComponent) component;
ResponseWriter writer = context.getResponseWriter();
writer.startElement("map", map);
writer.writeAttribute("name", map.getId(), "id");
}
/**
* <p>Encode the children of this component.</p>
*
* @param context <code>FacesContext</code>for the current request
* @param component <code>UIComponent</code> to be decoded
*/
public void encodeChildren(FacesContext context, UIComponent component)
throws IOException {
if ((context == null) || (component == null)) {
throw new NullPointerException();
}
}
/**
* <p>Encode the ending of this component.</p>
*
* @param context <code>FacesContext</code>for the current request
* @param component <code>UIComponent</code> to be decoded
*/
public void encodeEnd(FacesContext context, UIComponent component)
throws IOException {
if ((context == null) || (component == null)) {
throw new NullPointerException();
}
MapComponent map = (MapComponent) component;
ResponseWriter writer = context.getResponseWriter();
writer.startElement("input", map);
writer.writeAttribute("type", "hidden", null);
writer.writeAttribute("name", getName(context, map), "clientId");
writer.endElement("input");
writer.endElement("map");
}
// --------------------------------------------------------- Private Methods
/**
* <p>Return the calculated name for the hidden input field.</p>
*
* @param context Context for the current request
* @param component Component we are rendering
*/
private String getName(FacesContext context, UIComponent component) {
return (component.getId() + "_current");
}
/**
* <p>Return the context-relative path for the current page.</p>
*
* @param context Context for the current request
*/
private String getURI(FacesContext context) {
StringBuffer sb = new StringBuffer();
sb.append(context.getExternalContext().getRequestContextPath());
// PENDING(craigmcc) - will need to change if this is generalized
sb.append("/faces");
sb.append(context.getViewRoot().getViewId());
return (sb.toString());
}
}