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JSF components and utilities that can be used with any JSF implementation. This library is compatible with both JSF1.1 and JSF1.2; however for JSF1.2 users there is an alternative build of Tomahawk available that takes advantage of JSF1.2 features to offer some additional benefits.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.myfaces.custom.fileupload;

import org.apache.myfaces.component.UserRoleUtils;
import org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HTML;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRenderer;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRendererUtils;
import org.apache.myfaces.webapp.filter.MultipartRequestWrapper;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.FacesException;
import javax.faces.context.ResponseWriter;
import javax.faces.context.ExternalContext;
import javax.faces.convert.ConverterException;
import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.IOException;
import java.util.Map;

/**
 * Renderer for the HtmlInputFileUpload component.
 * 

* See also class AbstractHtmlInputFileUpload. * * @JSFRenderer * renderKitId = "HTML_BASIC" * family = "javax.faces.Input" * type = "org.apache.myfaces.FileUpload" * * @author Manfred Geiler (latest modification by $Author: lu4242 $) * @version $Revision: 782515 $ $Date: 2009-06-07 22:28:42 -0500 (Sun, 07 Jun 2009) $ */ public class HtmlFileUploadRenderer extends HtmlRenderer { private static final Log log = LogFactory.getLog(HtmlFileUploadRenderer.class); public void encodeEnd(FacesContext facesContext, UIComponent uiComponent) throws IOException { super.encodeEnd(facesContext, uiComponent); //check for NP ResponseWriter writer = facesContext.getResponseWriter(); writer.startElement(HTML.INPUT_ELEM, uiComponent); writer.writeAttribute(HTML.TYPE_ATTR, HTML.FILE_ATTR, null); String clientId = uiComponent.getClientId(facesContext); renderId(facesContext, uiComponent); writer.writeAttribute(HTML.NAME_ATTR, clientId, null); UploadedFile value = (UploadedFile)((HtmlInputFileUpload)uiComponent).getValue(); if (value != null) { if( value.getName() != null ) { writer.writeAttribute(HTML.VALUE_ATTR, value.getName(), null); } } HtmlRendererUtils.renderHTMLAttributes(writer, uiComponent, HTML.INPUT_FILE_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED); if (isDisabled(facesContext, uiComponent)) { writer.writeAttribute(HTML.DISABLED_ATTR, Boolean.TRUE, null); } writer.endElement(HTML.INPUT_ELEM); } protected boolean isDisabled(FacesContext facesContext, UIComponent uiComponent) { if (!UserRoleUtils.isEnabledOnUserRole(uiComponent)) { //if the user is not enabled, the component is //disabled, so it should return true. return true; } else { if (uiComponent instanceof HtmlInputFileUpload) { return ((HtmlInputFileUpload)uiComponent).isDisabled(); } else { return RendererUtils.getBooleanAttribute(uiComponent, HTML.DISABLED_ATTR, false); } } } private void setSubmittedValueForImplementation( FacesContext facesContext, UIComponent uiComponent, FileItem fileItem) { try { UploadedFile upFile; String implementation = ((HtmlInputFileUpload)uiComponent).getStorage(); if (implementation == null || implementation.length() == 0) { implementation = "default"; } if (("memory").equals(implementation)) { upFile = new UploadedFileDefaultMemoryImpl(fileItem); } else if (("default").equals(implementation)) { if (fileItem.isInMemory()) { upFile = new UploadedFileDefaultMemoryImpl(fileItem); } else { upFile = new UploadedFileDefaultFileImpl(fileItem); } } else //"file" case { upFile = new UploadedFileDefaultFileImpl(fileItem); } ((HtmlInputFileUpload)uiComponent).setSubmittedValue(upFile); ((HtmlInputFileUpload)uiComponent).setValid(true); } catch (IOException ioe) { throw new FacesException( "Exception while processing file upload for file-input : " + uiComponent.getClientId(facesContext), ioe); } } /** * Handle the postback of a form containing a fileUpload component. *

* The browser request will have been in "multi-part-mime" format, where * the normal http post is in one part, and the file being uploaded is * in another. Hopefully JSF has been configured so that this special * request is wrapped in a custom ServletRequest that allows us to * fetch that extra data.... */ public void decode(FacesContext facesContext, UIComponent uiComponent) { super.decode(facesContext, uiComponent); //check for NP //MultipartWrapper might have been wrapped again by one or more additional //Filters. We try to find the MultipartWrapper, but if a filter has wrapped //the ServletRequest with a class other than HttpServletRequestWrapper //this will fail. Object request = facesContext.getExternalContext().getRequest(); if (!(request instanceof ServletRequest)) { ExternalContext externalContext = facesContext.getExternalContext(); Map fileItems = (Map)externalContext.getRequestMap(). get(MultipartRequestWrapper.UPLOADED_FILES_ATTRIBUTE); FileItem fileItem = null; if (fileItems != null) { String paramName = uiComponent.getClientId(facesContext); fileItem = (FileItem) fileItems.get(paramName); } if (fileItem != null) { setSubmittedValueForImplementation(facesContext, uiComponent, fileItem); } return; } if(facesContext.getExternalContext().getRequest() instanceof ServletRequest) { ServletRequest multipartRequest = (ServletRequest)facesContext.getExternalContext().getRequest(); while (multipartRequest != null && !(multipartRequest instanceof MultipartRequestWrapper)) { if (multipartRequest instanceof HttpServletRequestWrapper) { multipartRequest = ((HttpServletRequestWrapper)multipartRequest).getRequest(); } else { multipartRequest = null; } } if (multipartRequest != null) { MultipartRequestWrapper mpReq = (MultipartRequestWrapper)multipartRequest; String paramName = uiComponent.getClientId(facesContext); FileItem fileItem = mpReq.getFileItem(paramName); if (fileItem != null) { setSubmittedValueForImplementation(facesContext, uiComponent, fileItem); } } } } public Object getConvertedValue(FacesContext context, UIComponent component, Object submittedValue) throws ConverterException { if(submittedValue instanceof UploadedFile) { UploadedFile file = (UploadedFile) submittedValue; if(file.getSize()>0 && file.getName()!=null && file.getName().length()>0) { return file; } } return null; } }





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