import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.util.Enumeration;

import java.util.Properties;

public class JavaPropertiesToC {

public static void main(String[] args) {

// Determine platform

String osname = System.getProperty("os.name");

boolean windows = false;

if (osname != null && osname.toLowerCase().startsWith("windows"))

windows = true;

// Evaluate arguments

String bundle = null;

File srcdir = new File(System.getProperty("user.dir"));

for (int i = 0; i < args.length; i++) {

if ("-bundle".equals(args[i])) {

if (i + 1 < args.length)

bundle = args[++i];

else

printUsage(args[0] + " option needs to be followed by a bundle name");

}

else if ("-srcdir".equals(args[i])) {

if (i + 1 < args.length)

srcdir = new File(args[++i]);

else

printUsage(args[0] + " option needs to be followed by a bundle name");

}

else {

printUsage(args[0] + " is not a valid option");

}

}

if (bundle == null)

printUsage("Required arguments are missing");

if (!srcdir.isDirectory() || !srcdir.canRead())

printUsage("Source directory " + srcdir + " is not a readable directory");

// Print required includes

String exportMacro = "EXPORT_DATA";

if (windows) {

System.out.println("#include <wchar.h>");

System.out.println("#define " + exportMacro + " __declspec(dllexport)");

}

else {

System.out.println("#define " + exportMacro);

}

System.out.println("#ifdef __cplusplus");

System.out.println("extern \"C\" {");

System.out.println("#endif");

// Iterate through <bundle name>*.properties files in source directory

String[] fileList = srcdir.list();

String fileExtension = ".properties";

for (int i = 0; i < fileList.length; i++) {

if (!fileList[i].startsWith(bundle) || !fileList[i].endsWith(fileExtension))

continue;

String locale = fileList[i].substring(bundle.length(), fileList[i].length() - fileExtension.length());

if (locale.length() > 0 && !locale.startsWith("_"))

continue;

// Load the file into a properties object

Properties props = new Properties();

FileInputStream fis = null;

try {

fis = new FileInputStream(new File(srcdir, fileList[i]));

props.load(fis);

}

catch (Exception e) {

printUsage(e.getMessage());

}

finally {

try {

if (fis != null)

fis.close();

}

catch (Throwable t) {}

}

// Write out the properties to as wchar_t arrays on Windows and

// UTF-8 on Unix platforms. We need to use UTF-8 on Unix platforms

// because the wc*to*mb and mb*to*wc functions assume that the

// content in the wchar_t array is the same encoding as the user's

// current encoding instead of being Unicode!

String prefix = bundle + locale + "_";

Enumeration enume = props.keys();

while (enume.hasMoreElements()) {

String key = (String)enume.nextElement();

String value = (String)props.getProperty(key);

if (windows)

System.out.print(exportMacro + " const wchar_t *" + prefix + key + "() { return L\"");

else

System.out.print(exportMacro + " const char *" + prefix + key + "() { return \"");

// Print each character in the value in hexadecimal format so

// no escape characters are required

if (value != null) {

if (windows) {

char[] chars = value.toCharArray();

for (int j = 0; j < chars.length; j++)

System.out.print("\\x" + Integer.toHexString(chars[j]));

}

else {

try {

byte[] bytes = value.getBytes("UTF8");

for (int j = 0; j < bytes.length; j++)

{

int k = bytes[j];

if (k < 0)

k += 256;

System.out.print("\\x" + Integer.toHexString(k));

}

}

catch (Exception e) {

e.printStackTrace();

System.exit(1);

}

}

}

System.out.println("\"; }");

}

}

System.out.println("#ifdef __cplusplus");

System.out.println("}");

System.out.println("#endif");

// If we made it this far, everything went OK

System.exit(0);

}

public static void printUsage(String msg) {

if (msg != null)

System.err.println(msg);

System.err.println(

"Usage: java -classpath " + System.getProperty("java.class.path") + " [-options] -bundle <ltresource bundle name>\n" +

"where -options include:\n" +

" -srcdir <directory to look for resource bundle>");

System.exit(1);

}

}