TextRenderer.java

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package j2meDemo.renderkit;

import javax.faces.component.UIComponent;
import javax.faces.component.ValueHolder;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.Renderer;

import java.io.IOException;
import java.net.URLEncoder;
import java.util.Map;

public class TextRenderer extends Renderer {
    public void encodeBegin(FacesContext context, UIComponent component)
          throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        String id = component.getId();
        String value = "" + ((ValueHolder) component).getValue();
        writer.write(id + "=" + URLEncoder.encode(value, "UTF8") + "\n");
    }

    public void decode(FacesContext context, UIComponent component) {
        if (context == null || component == null) {
            return;
        }

        String id = component.getId();
        Map requestMap
              = context.getExternalContext().getRequestParameterMap();
        if (requestMap.containsKey(id)
            && component instanceof ValueHolder) {
            String newValue = (String) requestMap.get(id);
            ((ValueHolder) component).setValue(newValue);
        }
    }
}