com.sun.mojarra.scales.renderer.FileDownloadRenderer Maven / Gradle / Ivy

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This is the core for Mojarra Scales. It has everything that Scales offers minus the multi-file upload component dependencies due to their size.
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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 * 
 * Contributor(s):
 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

/**
 * 
 */
package com.sun.mojarra.scales.renderer;

import java.io.IOException;

import java.io.UnsupportedEncodingException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.servlet.http.HttpServletRequest;

import com.sun.mojarra.scales.component.FileDownload;
import com.sun.mojarra.scales.util.ScalesUtil;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import javax.el.ValueExpression;
import javax.faces.component.UIParameter;

/**
 * @author Jason Lee
 *
 */
public class FileDownloadRenderer extends AbstractRenderer {
    protected Object oldBinding = null;

    @Override
    public boolean getRendersChildren() {
        return false;
    }
    
    @Override
    public void encodeBegin(FacesContext context, UIComponent component) throws IOException {
        if (context == null) {
            throw new NullPointerException("param 'context' is null");
        }
        if (component == null) {
            throw new NullPointerException("param 'component' is null");
        }

        // suppress rendering if "rendered" property on the component is false.
        if (!component.isRendered()) {
            return;
        }
        FileDownload dl = (FileDownload) component;
        super.encodeBegin(context, component);
        Map attrs = dl.getAttributes();
        if ((attrs.get("urlVar") != null) || (component.getChildCount() > 0)){
            setElValue(context, dl);
        }
        if (FileDownload.METHOD_DOWNLOAD.equals(attrs.get("method"))) { // || (comp.getChildCount() == 0)) {
            renderLink(context, dl);
        }
    }
    
    protected void setElValue(FacesContext context, FileDownload comp) {
        ValueExpression ve = ScalesUtil.createValueExpression("#{"+(String)comp.getAttributes().get("urlVar")+"}", FileDownload.class);
        ve.setValue(context.getELContext(), generateUri(context, comp));
    }
    
    protected void resetElValue(FacesContext context, FileDownload comp) {
        ValueExpression ve = ScalesUtil.createValueExpression("#{"+(String)comp.getAttributes().get("urlVar")+"}", FileDownload.class);
        ve.setValue(context.getELContext(), null);
    }

    @Override
    public void encodeEnd(FacesContext context, UIComponent component) throws IOException {
        if (context == null) {
            throw new NullPointerException("param 'context' is null");
        }
        if (component == null) {
            throw new NullPointerException("param 'component' is null");
        }

        // suppress rendering if "rendered" property on the component is false.
        if (!component.isRendered()) {
            return;
        }
        FileDownload dl = (FileDownload) component;
        Map attrs = dl.getAttributes();
        if (FileDownload.METHOD_INLINE.equals((String)attrs.get("method"))) {
            renderInline(context, dl);
        } else if (FileDownload.METHOD_DOWNLOAD.equals((String)attrs.get("method"))) {
            ResponseWriter writer = context.getResponseWriter();
            writer.endElement("a"); // finsh up the link!
        }
        HttpServletRequest request = (HttpServletRequest) context.getExternalContext().getRequest();
        Map data = new HashMap();
        data.put ("filename", (String)attrs.get("fileName"));
        data.put ("method", (String)attrs.get("method"));
        data.put ("data", attrs.get("data"));
        data.put ("mimetype", (String)attrs.get("mimeType"));
        request.getSession().setAttribute("HtmlDownload-" + dl.getClientId(context), data);
        resetElValue(context, dl);
        super.encodeEnd(context, component);
    }

    protected void renderInline(FacesContext context, FileDownload comp) throws IOException {
//        String width = comp.getWidth();
//        String height = comp.getHeight();
        
        ResponseWriter writer = context.getResponseWriter();
        Map attrs = comp.getAttributes();
        String uri = context.getExternalContext().getRequestContextPath() +
                generateUri(context, comp);
        if (Boolean.TRUE.equals((Boolean)attrs.get("iframe"))) {
            writer.startElement("iframe", comp);
            writer.writeURIAttribute("src", uri, "src");
//            writer.writeAttribute("width", width, "width");
//            writer.writeAttribute("height", height, "height");
            ScalesUtil.renderPassThruAttributes(writer, comp);
            writer.endElement("iframe");
        } else {
            writer.startElement("object", comp);
            writer.writeURIAttribute("data", uri, "data");
            writer.writeAttribute("type", (String)attrs.get("mimeType"), "type");
//            writer.writeAttribute("width", width, "width");
//            writer.writeAttribute("height", height, "height");
            ScalesUtil.renderPassThruAttributes(writer, comp);
            writer.endElement("object");
        }
    }

    protected void renderLink(FacesContext context, FileDownload comp) throws IOException {
        ResponseWriter writer = context.getResponseWriter();

        writer.startElement("a", comp);
        writer.writeURIAttribute("href", context.getExternalContext().getRequestContextPath() +
                generateUri(context, comp), "data");
        ScalesUtil.renderPassThruAttributes(writer, comp);
        if (comp.getChildCount() > 0) {
            //
        } else {
            writer.writeText((String)comp.getAttributes().get("text"), null);
        }

    }

    protected String generateUri(FacesContext context, FileDownload comp) {
        StringBuilder url = new StringBuilder();
        url.append(ScalesUtil.createResourceUrl(context, comp.getClientId(context)))
                .append("&").append(FileDownload.FILE_DOWNLOAD_INDICATOR);
        for (UIComponent child : comp.getChildren()) {
            if (child instanceof UIParameter) {
                UIParameter param = (UIParameter) child;
                String name = param.getName();
                String value = "";
                try {
                    value = URLEncoder.encode(param.getValue().toString(), "UTF-8");
                } catch (UnsupportedEncodingException ex) {
                    Logger.getLogger(FileDownloadRenderer.class.getName()).log(Level.SEVERE, null, ex);
                }
                if ((name != null) && !"".equals(name)) {
                    url.append("&")
                        .append(name)
                        .append("=")
                        .append(value);
                }
            }
        }
        return url.toString();
    }
}