InputFileRenderer.java

/*
 * Copyright 2011-2012 Blazebit
 */
package com.blazebit.blazefaces.component.inputfile;

import java.io.IOException;

import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.Part;

import com.blazebit.blazefaces.apt.JsfRenderer;
import com.blazebit.blazefaces.renderkit.OutputRenderer;
import com.blazebit.blazefaces.util.HTML5;
import com.blazebit.blazefaces.util.RendererUtils;

@JsfRenderer
public class InputFileRenderer extends OutputRenderer {

    @Override
    public void decode(FacesContext context, UIComponent component) {
        InputFile inputFile = (InputFile) component;
        
        if(!inputFile.isDisabled()) {
            String clientId = inputFile.getClientId(context);
            
            Part part = null;
            
            try {
                part = ((HttpServletRequest)context.getExternalContext().getRequest()).getPart(clientId);
            } catch (IOException ex) {
                throw new FacesException("Could not get the part", ex);
            } catch (ServletException ex) {
                throw new FacesException("Could not get the part", ex);
            }
            
            if(part != null) {
                if(part.getName().equals("")) {
                    inputFile.setSubmittedValue("");
                } else {
                    inputFile.setSubmittedValue(part);
                }
            }
        }
    }

    @Override
    public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
        String clientId = component.getClientId(context);
        InputFile inputFile = (InputFile) component;
        
        encodeMarkup(context, inputFile, clientId);
        encodeScript(context, inputFile, clientId);
    }
    
    public void encodeMarkup(FacesContext context, InputFile component, String clientId) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        writer.startElement("input", component);

        RendererUtils.encodeAttribute(writer, "id", clientId, null);
        RendererUtils.encodeAttribute(writer, "name", clientId, null);
        RendererUtils.encodeAttribute(writer, "type", "file", null);
        RendererUtils.encodeAttribute(writer, "class", component.getStyleClass(), null, "styleClass");
        RendererUtils.encodeBooleanAttribute(writer, "disabled", component.isDisabled(), false, "disabled");
        renderPassThruAttributes(context, component, HTML5.COMMON_ATTRIBUTES);
        renderPassThruAttributes(context, component, HTML5.COMMON_TAG_ATTRIBUTES);
        renderDataMapAttributes(context, component);
        writer.endElement("input");
    }
    
    public void encodeScript(FacesContext context, InputFile component, String clientId) throws IOException {
        StringBuilder scriptBuilder = new StringBuilder();
        
        scriptBuilder.append("");
        
        RendererUtils.addBodyBottomScript(context, scriptBuilder.toString());
    }
}