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org.primefaces.component.export.XMLExporter Maven / Gradle / Ivy
/*
* Copyright 2009-2013 PrimeTek.
*
* Licensed 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.primefaces.component.export;
import java.io.*;
import java.util.Collections;
import java.util.List;
import javax.el.MethodExpression;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import org.primefaces.component.api.DynamicColumn;
import org.primefaces.component.api.UIColumn;
import org.primefaces.component.datatable.DataTable;
import org.primefaces.util.Constants;
public class XMLExporter extends Exporter {
@Override
public void export(FacesContext context, DataTable table, String filename, boolean pageOnly, boolean selectionOnly, String encodingType, MethodExpression preProcessor, MethodExpression postProcessor) throws IOException {
ExternalContext externalContext = context.getExternalContext();
configureResponse(externalContext, filename);
OutputStream os = externalContext.getResponseOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os, encodingType);
PrintWriter writer = new PrintWriter(osw);
writer.write("\n");
writer.write("<" + table.getId() + ">\n");
if(pageOnly) {
exportPageOnly(context, table, writer);
}
else if(selectionOnly) {
exportSelectionOnly(context, table, writer);
}
else {
exportAll(context, table, writer);
}
writer.write("");
table.setRowIndex(-1);
writer.flush();
writer.close();
externalContext.responseFlushBuffer();
}
@Override
protected void preRowExport(DataTable table, Object document) {
((PrintWriter) document).write("\t<" + table.getVar() + ">\n");
}
@Override
protected void postRowExport(DataTable table, Object document) {
((PrintWriter) document).write("\t\n");
}
@Override
protected void exportCells(DataTable table, Object document) {
PrintWriter writer = (PrintWriter) document;
for(UIColumn col : table.getColumns()) {
if(!col.isRendered()) {
continue;
}
if(col instanceof DynamicColumn) {
((DynamicColumn) col).applyModel();
}
if(col.isExportable()) {
String columnTag = getColumnTag(col);
try {
addColumnValue(writer, col.getChildren(), columnTag);
}
catch (IOException ex) {
throw new FacesException(ex);
}
}
}
}
protected String getColumnTag(UIColumn column) {
String headerText = column.getHeaderText();
UIComponent facet = column.getFacet("header");
if(headerText != null) {
return headerText.toLowerCase();
}
else if(facet != null) {
return exportValue(FacesContext.getCurrentInstance(), facet).toLowerCase();
}
else {
throw new FacesException("No suitable xml tag found for " + column);
}
}
protected void addColumnValue(Writer writer, List components, String tag) throws IOException {
FacesContext context = FacesContext.getCurrentInstance();
StringBuilder builder = new StringBuilder();
writer.write("\t\t<" + tag + ">");
for(UIComponent component : components) {
if(component.isRendered()) {
String value = exportValue(context, component);
builder.append(value);
}
}
writer.write(builder.toString());
writer.write("\n");
}
protected void configureResponse(ExternalContext externalContext, String filename) {
externalContext.setResponseContentType("text/xml");
externalContext.setResponseHeader("Expires", "0");
externalContext.setResponseHeader("Cache-Control","must-revalidate, post-check=0, pre-check=0");
externalContext.setResponseHeader("Pragma", "public");
externalContext.setResponseHeader("Content-disposition", "attachment;filename="+ filename + ".xml");
externalContext.addResponseCookie(Constants.DOWNLOAD_COOKIE, "true", Collections.emptyMap());
}
}