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// FileRenderer.java
package com.sun.faces.renderkit.html_basic;
import com.sun.faces.renderkit.RenderKitUtils;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import javax.faces.FacesException;
import javax.faces.application.FacesMessage;
import javax.faces.application.ProjectStage;
import javax.faces.component.UIComponent;
import javax.faces.component.UIForm;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.convert.ConverterException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.Part;
public class FileRenderer extends TextRenderer {
// ---------------------------------------------------------- Public Methods
@Override
public void decode(FacesContext context, UIComponent component) {
rendererParamsNotNull(context, component);
if (!shouldDecode(component)) {
return;
}
String clientId = decodeBehaviors(context, component);
if (clientId == null) {
clientId = component.getClientId(context);
}
assert(clientId != null);
ExternalContext externalContext = context.getExternalContext();
Map<String, String> requestMap = externalContext.getRequestParameterMap();
if (requestMap.containsKey(clientId)) {
setSubmittedValue(component, requestMap.get(clientId));
}
HttpServletRequest request = (HttpServletRequest) externalContext.getRequest();
try {
Collection<Part> parts = request.getParts();
for (Part cur : parts) {
if (clientId.equals(cur.getName())) {
component.setTransient(true);
setSubmittedValue(component, cur);
}
}
} catch (IOException ioe) {
throw new FacesException(ioe);
} catch (ServletException se) {
throw new FacesException(se);
}
}
// If we are in Project Stage Development mode, the parent form
// must have an enctype of "multipart/form-data" for this component.
// If not, produce a message.
@Override
public void encodeBegin(FacesContext context, UIComponent component)
throws IOException {
if (context.isProjectStage(ProjectStage.Development)) {
boolean produceMessage = false;
UIForm form = RenderKitUtils.getForm(component, context);
if (null != form) {
String encType = (String)form.getAttributes().get("enctype");
if (null == encType || !encType.equals("multipart/form-data")) {
produceMessage = true;
}
} else {
produceMessage = true;
}
if (produceMessage) {
FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_WARN,
"File upload component requires a form with an enctype of multipart/form-data",
"File upload component requires a form with an enctype of multipart/form-data");
context.addMessage(component.getClientId(context), message);
}
}
super.encodeBegin(context, component);
}
@Override
public Object getConvertedValue(FacesContext context, UIComponent component, Object submittedValue) throws ConverterException {
if (submittedValue instanceof Part) {
Part part = (Part) submittedValue;
if ((part.getHeader("content-disposition") == null || part.getHeader("content-disposition").endsWith("filename=\"\"")) && part.getSize() <= 0) {
return null;
}
}
return submittedValue;
}
}