This question has been asked several times:
How can I generate a web.xml out of *.gwt.xml module files.
Here is a simple class that solved the problem for us:
package com.ifbag.gwtbase.base;
import java.io.*;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.dev.cfg.ModuleDef;
import com.google.gwt.dev.cfg.ModuleDefLoader;
import com.google.gwt.dev.util.log.PrintWriterTreeLogger;
@SuppressWarnings("nls")
public class GWTModule2WebXml {
private String moduleFile;
private String webXml;
private BufferedWriter os;
public GWTModule2WebXml() {
super();
}
public String getModuleFile() {
return moduleFile;
}
public void setModuleFile(String aModule) {
this.moduleFile = aModule;
}
public void setWebXml(String aFilename) {
this.webXml = aFilename;
}
public String getWebXml() {
return webXml;
}
public void setOs(BufferedWriter aOs) {
this.os = aOs;
}
public BufferedWriter getOs() {
return os;
}
/**
*
* @param args
*/
public static void main(String[] args) {
try {
GWTModule2WebXml g = new GWTModule2WebXml();
g.setWebXml("web.xml");
g.setModuleFile("com.ifbag.gwttest.base.GWTTest");
g.execute();
}
catch (Exception e) {
e.printStackTrace();
}
}
public void execute() throws Exception {
try {
// GWT lädt die Klasse über den ContextClassLoader !
// in ant ist dieser aber nicht gesetzt
ClassLoader classLoader = getClass().getClassLoader();
Thread.currentThread().setContextClassLoader(classLoader);
FileOutputStream fos = new
FileOutputStream(getWebXml());
BufferedWriter bw = new BufferedWriter(new
PrintWriter(fos));
setOs(bw);
ModuleDef module = readModule();
generateWebXml(module);
bw.close();
}
catch (Exception e) {
e.printStackTrace();
throw e;
}
}
private ModuleDef readModule() throws FileNotFoundException,
UnableToCompleteException {
PrintWriter out = new PrintWriter(new
FileOutputStream("module.log"));
TreeLogger logger = new PrintWriterTreeLogger(out);
try {
ModuleDef module =
ModuleDefLoader.loadFromClassPath(logger,
getModuleFile());
return module;
}
finally {
out.close();
}
}
private void generateWebXml(ModuleDef module) throws IOException {
writeHead();
writeBody(module);
writeFooter();
}
private void writeBody(ModuleDef module) throws IOException {
String[] servletPaths = module.getServletPaths();
for (int i = 0; i < servletPaths.length; i++) {
String path = servletPaths[i];
String servlet = module.findServletForPath(path);
writeServlet(path, servlet);
}
for (int i = 0; i < servletPaths.length; i++) {
String path = servletPaths[i];
String servlet = module.findServletForPath(path);
writeServletMapping(path, servlet);
}
writeln("");
}
private void writeServlet(String path, String servlet) throws
IOException {
writeln("\t<servlet>");
writeln("\t\t<servlet-name>" + path + "</servlet-name>");
writeln("\t\t<servlet-class>");
writeln("\t\t\t" + servlet);
writeln("\t\t</servlet-class>");
writeln("\t</servlet>");
}
private void writeServletMapping(String path, String servlet) throws
IOException {
writeln("\t<servlet-mapping>");
writeln("\t\t<servlet-name>" + path + "</servlet-name>");
writeln("\t\t<url-pattern>");
writeln("\t\t\t/" + getModuleFile() + path);
writeln("\t\t</url-pattern>");
writeln("\t</servlet-mapping>");
}
private void writeFooter() throws IOException {
writeln("\t<welcome-file-list>");
String jspFile = getModuleFile() + "/" + getModuleName();
writeln("\t\t<welcome-file>" + jspFile + ".jsp</welcome-file>");
writeln("\t</welcome-file-list>");
writeln("");
writeln("</web-app>");
}
private String getModuleName() {
String moduleFile2 = getModuleFile();
int lastIndexOf = moduleFile2.lastIndexOf('.');
return moduleFile2.substring(lastIndexOf + 1);
}
private void writeln(String line) throws IOException {
getOs().write(line + "\n");
}
private void writeHead() throws IOException {
writeln("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
writeln("<web-app id=\"WebApp_ID\" version=\"2.4\"");
writeln("\t\txmlns=\"http://java.sun.com/xml/ns/j2ee\"";);
writeln("\t\txmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance
\"");
writeln("\t\txsi:schemaLocation=\"http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd\";>");
// <display-name>GWTTest</display-name>
writeln("");
}
}
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